sync

fitness-tui/.kilocode/mcp.json

@@ -1,23 +0,0 @@
-{
-  "mcpServers": {
-    "context7": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "@upstash/context7-mcp"
-      ],
-      "env": {
-        "DEFAULT_MINIMUM_TOKENS": ""
-      }
-    },
-    "penpot": {
-      "command": "uvx",
-      "args": ["penpot-mcp"],
-      "env": {
-        "PENPOT_API_URL": "https://design.penpot.app/api",
-        "PENPOT_USERNAME": "stuart.stent@gmail.com",
-        "PENPOT_PASSWORD": "Upriver!Magnetize!Bling2"
-      }
-    }
-  }
-}

fitness-tui/go.mod

@@ -1,53 +0,0 @@
-module github.com/sstent/fitness-tui
-
-go 1.24.2
-
-require (
-	github.com/charmbracelet/bubbles v0.21.0
-	github.com/charmbracelet/bubbletea v1.3.9
-	github.com/charmbracelet/lipgloss v1.1.0
-	github.com/go-resty/resty/v2 v2.16.5
-	github.com/spf13/cobra v1.8.0
-	github.com/spf13/viper v1.21.0
-	github.com/stretchr/testify v1.11.1
-)
-
-require github.com/sony/gobreaker v1.0.0
-
-require (
-	github.com/atotto/clipboard v0.1.4 // indirect
-	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
-	github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc // indirect
-	github.com/charmbracelet/x/ansi v0.10.1 // indirect
-	github.com/charmbracelet/x/cellbuf v0.0.13-0.20250311204145-2c3ea96c31dd // indirect
-	github.com/charmbracelet/x/term v0.2.1 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f // indirect
-	github.com/fsnotify/fsnotify v1.9.0 // indirect
-	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
-	github.com/inconshreveable/mousetrap v1.1.0 // indirect
-	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
-	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/mattn/go-localereader v0.0.1 // indirect
-	github.com/mattn/go-runewidth v0.0.16 // indirect
-	github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 // indirect
-	github.com/muesli/cancelreader v0.2.2 // indirect
-	github.com/muesli/termenv v0.16.0 // indirect
-	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/rivo/uniseg v0.4.7 // indirect
-	github.com/sagikazarmark/locafero v0.11.0 // indirect
-	github.com/sahilm/fuzzy v0.1.1 // indirect
-	github.com/sourcegraph/conc v0.3.1-0.20240121214520-5f936abd7ae8 // indirect
-	github.com/spf13/afero v1.15.0 // indirect
-	github.com/spf13/cast v1.10.0 // indirect
-	github.com/spf13/pflag v1.0.10 // indirect
-	github.com/subosito/gotenv v1.6.0 // indirect
-	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
-	go.yaml.in/yaml/v3 v3.0.4 // indirect
-	golang.org/x/net v0.33.0 // indirect
-	golang.org/x/sys v0.36.0 // indirect
-	golang.org/x/text v0.28.0 // indirect
-	gopkg.in/yaml.v3 v3.0.1
-)
-

fitness-tui/go.sum

@@ -1,116 +0,0 @@
-github.com/atotto/clipboard v0.1.4 h1:EH0zSVneZPSuFR11BlR9YppQTVDbh5+16AmcJi4g1z4=
-github.com/atotto/clipboard v0.1.4/go.mod h1:ZY9tmq7sm5xIbd9bOK4onWV4S6X0u6GY7Vn0Yu86PYI=
-github.com/aymanbagabas/go-osc52/v2 v2.0.1 h1:HwpRHbFMcZLEVr42D4p7XBqjyuxQH5SMiErDT4WkJ2k=
-github.com/aymanbagabas/go-osc52/v2 v2.0.1/go.mod h1:uYgXzlJ7ZpABp8OJ+exZzJJhRNQ2ASbcXHWsFqH8hp8=
-github.com/aymanbagabas/go-udiff v0.2.0 h1:TK0fH4MteXUDspT88n8CKzvK0X9O2xu9yQjWpi6yML8=
-github.com/aymanbagabas/go-udiff v0.2.0/go.mod h1:RE4Ex0qsGkTAJoQdQQCA0uG+nAzJO/pI/QwceO5fgrA=
-github.com/charmbracelet/bubbles v0.21.0 h1:9TdC97SdRVg/1aaXNVWfFH3nnLAwOXr8Fn6u6mfQdFs=
-github.com/charmbracelet/bubbles v0.21.0/go.mod h1:HF+v6QUR4HkEpz62dx7ym2xc71/KBHg+zKwJtMw+qtg=
-github.com/charmbracelet/bubbletea v1.3.9 h1:OBYdfRo6QnlIcXNmcoI2n1NNS65Nk6kI2L2FO1puS/4=
-github.com/charmbracelet/bubbletea v1.3.9/go.mod h1:ORQfo0fk8U+po9VaNvnV95UPWA1BitP1E0N6xJPlHr4=
-github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc h1:4pZI35227imm7yK2bGPcfpFEmuY1gc2YSTShr4iJBfs=
-github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc/go.mod h1:X4/0JoqgTIPSFcRA/P6INZzIuyqdFY5rm8tb41s9okk=
-github.com/charmbracelet/lipgloss v1.1.0 h1:vYXsiLHVkK7fp74RkV7b2kq9+zDLoEU4MZoFqR/noCY=
-github.com/charmbracelet/lipgloss v1.1.0/go.mod h1:/6Q8FR2o+kj8rz4Dq0zQc3vYf7X+B0binUUBwA0aL30=
-github.com/charmbracelet/x/ansi v0.10.1 h1:rL3Koar5XvX0pHGfovN03f5cxLbCF2YvLeyz7D2jVDQ=
-github.com/charmbracelet/x/ansi v0.10.1/go.mod h1:3RQDQ6lDnROptfpWuUVIUG64bD2g2BgntdxH0Ya5TeE=
-github.com/charmbracelet/x/cellbuf v0.0.13-0.20250311204145-2c3ea96c31dd h1:vy0GVL4jeHEwG5YOXDmi86oYw2yuYUGqz6a8sLwg0X8=
-github.com/charmbracelet/x/cellbuf v0.0.13-0.20250311204145-2c3ea96c31dd/go.mod h1:xe0nKWGd3eJgtqZRaN9RjMtK7xUYchjzPr7q6kcvCCs=
-github.com/charmbracelet/x/exp/golden v0.0.0-20241011142426-46044092ad91 h1:payRxjMjKgx2PaCWLZ4p3ro9y97+TVLZNaRZgJwSVDQ=
-github.com/charmbracelet/x/exp/golden v0.0.0-20241011142426-46044092ad91/go.mod h1:wDlXFlCrmJ8J+swcL/MnGUuYnqgQdW9rhSD61oNMb6U=
-github.com/charmbracelet/x/term v0.2.1 h1:AQeHeLZ1OqSXhrAWpYUtZyX1T3zVxfpZuEQMIQaGIAQ=
-github.com/charmbracelet/x/term v0.2.1/go.mod h1:oQ4enTYFV7QN4m0i9mzHrViD7TQKvNEEkHUMCmsxdUg=
-github.com/cpuguy83/go-md2man/v2 v2.0.3/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f h1:Y/CXytFA4m6baUTXGLOoWe4PQhGxaX0KpnayAqC48p4=
-github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f/go.mod h1:vw97MGsxSvLiUE2X8qFplwetxpGLQrlU1Q9AUEIzCaM=
-github.com/frankban/quicktest v1.14.6 h1:7Xjx+VpznH+oBnejlPUj8oUpdxnVs4f8XU8WnHkI4W8=
-github.com/frankban/quicktest v1.14.6/go.mod h1:4ptaffx2x8+WTWXmUCuVU6aPUX1/Mz7zb5vbUoiM6w0=
-github.com/fsnotify/fsnotify v1.9.0 h1:2Ml+OJNzbYCTzsxtv8vKSFD9PbJjmhYF14k/jKC7S9k=
-github.com/fsnotify/fsnotify v1.9.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
-github.com/go-resty/resty/v2 v2.16.5 h1:hBKqmWrr7uRc3euHVqmh1HTHcKn99Smr7o5spptdhTM=
-github.com/go-resty/resty/v2 v2.16.5/go.mod h1:hkJtXbA2iKHzJheXYvQ8snQES5ZLGKMwQ07xAwp/fiA=
-github.com/go-viper/mapstructure/v2 v2.4.0 h1:EBsztssimR/CONLSZZ04E8qAkxNYq4Qp9LvH92wZUgs=
-github.com/go-viper/mapstructure/v2 v2.4.0/go.mod h1:oJDH3BJKyqBA2TXFhDsKDGDTlndYOZ6rGS0BRZIxGhM=
-github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
-github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
-github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
-github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
-github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
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-github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
-github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
-github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
-github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69Aj6K7nkY=
-github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
-github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
-github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
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-github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
-github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
-github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
-github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
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-github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
-github.com/spf13/pflag v1.0.10 h1:4EBh2KAYBwaONj6b2Ye1GiHfwjqyROoF4RwYO+vPwFk=
-github.com/spf13/pflag v1.0.10/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
-github.com/spf13/viper v1.21.0 h1:x5S+0EU27Lbphp4UKm1C+1oQO+rKx36vfCoaVebLFSU=
-github.com/spf13/viper v1.21.0/go.mod h1:P0lhsswPGWD/1lZJ9ny3fYnVqxiegrlNrEmgLjbTCAY=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
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-github.com/subosito/gotenv v1.6.0/go.mod h1:Dk4QP5c2W3ibzajGcXpNraDfq2IrhjMIvMSWPKKo0FU=
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-github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e/go.mod h1:RbqR21r5mrJuqunuUZ/Dhy/avygyECGrLceyNeo4LiM=
-go.yaml.in/yaml/v3 v3.0.4 h1:tfq32ie2Jv2UxXFdLJdh3jXuOzWiL1fo0bu/FbuKpbc=
-go.yaml.in/yaml/v3 v3.0.4/go.mod h1:DhzuOOF2ATzADvBadXxruRBLzYTpT36CKvDb3+aBEFg=
-golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561 h1:MDc5xs78ZrZr3HMQugiXOAkSZtfTpbJLDr/lwfgO53E=
-golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561/go.mod h1:cyybsKvd6eL0RnXn6p/Grxp8F5bW7iYuBgsNCOHpMYE=
-golang.org/x/net v0.33.0 h1:74SYHlV8BIgHIFC/LrYkOGIwL19eTYXQ5wc6TBuO36I=
-golang.org/x/net v0.33.0/go.mod h1:HXLR5J+9DxmrqMwG9qjGCxZ+zKXxBru04zlTvWlWuN4=
-golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.36.0 h1:KVRy2GtZBrk1cBYA7MKu5bEZFxQk4NIDV6RLVcC8o0k=
-golang.org/x/sys v0.36.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
-golang.org/x/text v0.28.0 h1:rhazDwis8INMIwQ4tpjLDzUhx6RlXqZNPEM0huQojng=
-golang.org/x/text v0.28.0/go.mod h1:U8nCwOR8jO/marOQ0QbDiOngZVEBB7MAiitBuMjXiNU=
-golang.org/x/time v0.6.0 h1:eTDhh4ZXt5Qf0augr54TN6suAUudPcawVZeIAPU7D4U=
-golang.org/x/time v0.6.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
-gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
-gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

fitness-tui/internal/circuitbreaker/circuitbreaker.go

@@ -1,69 +0,0 @@
-package circuitbreaker
-
-import (
-	"log"
-	"sync"
-	"time"
-)
-
-type CircuitBreaker struct {
-	state        string // "closed", "open", "half-open"
-	failures     int
-	maxFailures  int
-	resetTimeout time.Duration
-	lastFailure  time.Time
-	mu           sync.Mutex
-}
-
-func New(maxFailures int, resetTimeout time.Duration) *CircuitBreaker {
-	return &CircuitBreaker{
-		state:        "closed",
-		maxFailures:  maxFailures,
-		resetTimeout: resetTimeout,
-	}
-}
-
-func (cb *CircuitBreaker) AllowRequest() bool {
-	cb.mu.Lock()
-	defer cb.mu.Unlock()
-
-	now := time.Now()
-	if cb.state == "open" {
-		if now.Sub(cb.lastFailure) < cb.resetTimeout {
-			return false
-		}
-		// Timeout expired, transition to half-open
-		cb.state = "half-open"
-		log.Printf("Circuit breaker transitioning to half-open state")
-	}
-	return true
-}
-
-func (cb *CircuitBreaker) RecordSuccess() {
-	cb.mu.Lock()
-	defer cb.mu.Unlock()
-
-	if cb.state == "half-open" {
-		log.Printf("Circuit breaker test request succeeded, closing circuit")
-	}
-	cb.state = "closed"
-	cb.failures = 0
-}
-
-func (cb *CircuitBreaker) RecordFailure() {
-	cb.mu.Lock()
-	defer cb.mu.Unlock()
-
-	now := time.Now()
-	cb.failures++
-	cb.lastFailure = now
-
-	if cb.state == "half-open" {
-		// Immediately open the circuit on failure in half-open state
-		log.Printf("Circuit breaker test request failed, reopening circuit")
-		cb.state = "open"
-	} else if cb.failures >= cb.maxFailures {
-		log.Printf("Circuit breaker opened due to %d consecutive failures", cb.failures)
-		cb.state = "open"
-	}
-}

fitness-tui/internal/tui/components/chart.go

@@ -1,232 +0,0 @@
-package components
-
-import (
-	"fmt"
-	"math"
-	"strings"
-	"time"
-
-	"github.com/charmbracelet/lipgloss"
-	"github.com/sstent/fitness-tui/internal/types"
-)
-
-// Chart represents an ASCII chart component
-type Chart struct {
-	Data        []float64
-	Title       string
-	Width       int
-	Height      int
-	Color       lipgloss.Color
-	Min, Max    float64
-	Downsampled []types.DownsampledPoint
-	Unit        string
-	Mode        string // "bar" or "sparkline"
-	XLabels     []string
-	YMax        float64
-}
-
-// NewChart creates a new chart instance
-func NewChart(data []float64, title, unit string, width, height int, color lipgloss.Color) *Chart {
-	c := &Chart{
-		Data:   data,
-		Title:  title,
-		Width:  width,
-		Height: height,
-		Color:  color,
-		Unit:   unit,
-		Mode:   "sparkline",
-	}
-
-	if len(data) > 0 {
-		// Use downsampled data for min/max to improve performance
-		// Using empty timestamps array since we only need value downsampling
-		downsampled := types.DownsampleLTTB(data, make([]time.Time, len(data)), width)
-		c.Downsampled = downsampled
-		values := make([]float64, len(downsampled))
-		for i, point := range downsampled {
-			values[i] = point.Value
-		}
-		c.Min, c.Max = minMax(values)
-	}
-	return c
-}
-
-// NewBarChart creates a bar chart with axis labels
-func NewBarChart(data []float64, title string, width, height int, color lipgloss.Color, xLabels []string, yMax float64) *Chart {
-	c := NewChart(data, title, "", width, height, color)
-	c.Mode = "bar"
-	c.XLabels = xLabels
-	c.YMax = yMax
-	return c
-}
-
-// View renders the chart
-func (c *Chart) View() string {
-	if len(c.Data) == 0 {
-		return c.renderNoData()
-	}
-
-	if c.Width <= 10 || c.Height <= 4 {
-		return c.renderTooSmall()
-	}
-
-	if c.Mode == "bar" && c.YMax == 0 {
-		return c.renderNoData()
-	}
-
-	// Recalculate if dimensions changed
-	if len(c.Downsampled) != c.Width {
-		c.Downsampled = types.DownsampleLTTB(c.Data, make([]time.Time, len(c.Data)), c.Width)
-		values := make([]float64, len(c.Downsampled))
-		for i, point := range c.Downsampled {
-			values[i] = point.Value
-		}
-		c.Min, c.Max = minMax(values)
-	}
-
-	return lipgloss.NewStyle().
-		MaxWidth(c.Width).
-		Render(c.renderTitle() + "\n" + c.renderChart())
-}
-
-func (c *Chart) renderTitle() string {
-	return lipgloss.NewStyle().
-		Bold(true).
-		Foreground(c.Color).
-		Render(c.Title)
-}
-
-func (c *Chart) renderChart() string {
-	if c.Max == c.Min && c.Mode != "bar" {
-		return c.renderConstantData()
-	}
-
-	if c.Mode == "bar" {
-		return c.renderBarChart()
-	}
-	return c.renderSparkline()
-}
-
-func (c *Chart) renderBarChart() string {
-	var sb strings.Builder
-	chartHeight := c.Height - 3 // Reserve space for title and labels
-
-	// Calculate scaling factor
-	maxValue := c.YMax
-	if maxValue == 0 {
-		maxValue = c.Max
-	}
-	scale := float64(chartHeight-1) / maxValue
-
-	// Y-axis labels
-	yIncrement := maxValue / float64(chartHeight-1)
-	for i := chartHeight - 1; i >= 0; i-- {
-		label := fmt.Sprintf("%3.0f │", maxValue-(yIncrement*float64(i)))
-		sb.WriteString(label)
-		if i == 0 {
-			sb.WriteString(" " + strings.Repeat("─", c.Width))
-			break
-		}
-
-		// Draw bars
-		for _, point := range c.Downsampled {
-			barHeight := int(math.Round(point.Value * scale))
-			if barHeight >= i {
-				sb.WriteString("#")
-			} else {
-				sb.WriteString(" ")
-			}
-		}
-		sb.WriteString("\n")
-	}
-
-	// X-axis labels
-	sb.WriteString("\n    ")
-	for i, label := range c.XLabels {
-		if i >= len(c.Downsampled) {
-			break
-		}
-		if i == 0 {
-			sb.WriteString(" ")
-		}
-		sb.WriteString(fmt.Sprintf("%-*s", c.Width/len(c.XLabels), label))
-	}
-
-	return sb.String()
-}
-
-func (c *Chart) renderSparkline() string {
-	var sb strings.Builder
-	chartHeight := c.Height - 3 // Reserve rows for title and labels
-
-	minLabel := fmt.Sprintf("%.0f%s", c.Min, c.Unit)
-	maxLabel := fmt.Sprintf("%.0f%s", c.Max, c.Unit)
-	sb.WriteString(fmt.Sprintf("%5s ", maxLabel))
-
-	for i, point := range c.Downsampled {
-		if i >= c.Width {
-			break
-		}
-
-		normalized := (point.Value - c.Min) / (c.Max - c.Min)
-		barHeight := int(math.Round(normalized * float64(chartHeight-1)))
-		sb.WriteString(c.renderBar(barHeight, chartHeight))
-	}
-	sb.WriteString("\n")
-
-	// Add X axis with min label
-	sb.WriteString(fmt.Sprintf("%5s ", minLabel))
-	sb.WriteString(strings.Repeat("─", c.Width))
-	return sb.String()
-}
-
-func (c *Chart) renderBar(height, maxHeight int) string {
-	if height <= 0 {
-		return " "
-	}
-
-	// Use Unicode block characters for better resolution
-	blocks := []string{" ", "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█"}
-	index := int(float64(height) / float64(maxHeight) * 8)
-	if index >= len(blocks) {
-		index = len(blocks) - 1
-	}
-
-	return lipgloss.NewStyle().
-		Foreground(c.Color).
-		Render(blocks[index])
-}
-
-func (c *Chart) renderNoData() string {
-	return lipgloss.NewStyle().
-		Foreground(lipgloss.Color("240")).
-		Render(fmt.Sprintf("%s: No data", c.Title))
-}
-
-func (c *Chart) renderTooSmall() string {
-	return lipgloss.NewStyle().
-		Foreground(lipgloss.Color("196")).
-		Render(fmt.Sprintf("%s: Terminal too small", c.Title))
-}
-
-func (c *Chart) renderConstantData() string {
-	return lipgloss.NewStyle().
-		Foreground(lipgloss.Color("214")).
-		Render(fmt.Sprintf("%s: Constant value %.2f", c.Title, c.Data[0]))
-}
-
-func minMax(data []float64) (min, max float64) {
-	if len(data) == 0 {
-		return 0, 0
-	}
-	min, max = data[0], data[0]
-	for _, v := range data {
-		if v < min {
-			min = v
-		}
-		if v > max {
-			max = v
-		}
-	}
-	return min, max
-}

fitness-tui/internal/types/downsample.go

@@ -1,84 +0,0 @@
-package types
-
-import "time"
-
-type DownsampledPoint struct {
-	Timestamp time.Time
-	Value     float64
-}
-
-// DownsampleLTTB implements the Largest Triangle Three Buckets algorithm
-// for time series downsampling. This is a corrected version that properly
-// uses the current module path.
-func DownsampleLTTB(data []float64, timestamps []time.Time, threshold int) []DownsampledPoint {
-	if len(data) != len(timestamps) {
-		panic("data and timestamps must be same length")
-	}
-
-	if threshold >= len(data) || threshold <= 0 {
-		result := make([]DownsampledPoint, len(data))
-		for i := range data {
-			result[i] = DownsampledPoint{
-				Timestamp: timestamps[i],
-				Value:     data[i],
-			}
-		}
-		return result
-	}
-
-	sampled := make([]DownsampledPoint, threshold)
-	sampled[0] = DownsampledPoint{Timestamp: timestamps[0], Value: data[0]}
-
-	bucketSize := float64(len(data)-2) / float64(threshold-2)
-	a := 0
-
-	for i := 0; i < threshold-2; i++ {
-		avgRangeStart := int(float64(i+1)*bucketSize) + 1
-		avgRangeEnd := int(float64(i+2)*bucketSize) + 1
-		if avgRangeEnd > len(data) {
-			avgRangeEnd = len(data)
-		}
-
-		var avgRange float64
-		for j := avgRangeStart; j < avgRangeEnd; j++ {
-			avgRange += data[j]
-		}
-		avgRange /= float64(avgRangeEnd - avgRangeStart)
-
-		rangeOffs := int(float64(i)*bucketSize) + 1
-		rangeTo := int(float64(i+1)*bucketSize) + 1
-		if rangeTo > len(data) {
-			rangeTo = len(data)
-		}
-
-		maxArea := -1.0
-		nextAAt := 0
-		for j := rangeOffs; j < rangeTo; j++ {
-			area := areaSize(
-				data[a],
-				data[j],
-				avgRange,
-			)
-			if area > maxArea {
-				maxArea = area
-				nextAAt = j
-			}
-		}
-
-		sampled[i+1] = DownsampledPoint{
-			Timestamp: timestamps[nextAAt],
-			Value:     data[nextAAt],
-		}
-		a = nextAAt
-	}
-
-	sampled[threshold-1] = DownsampledPoint{
-		Timestamp: timestamps[len(timestamps)-1],
-		Value:     data[len(data)-1],
-	}
-	return sampled
-}
-
-func areaSize(a, b, avg float64) float64 {
-	return (a-avg)*(a-avg) + (b-avg)*(b-avg)
-}

go.mod

@@ -2,4 +2,52 @@ module github.com/sstent/fitness-tui
 
 go 1.24.2
 
-require github.com/sony/gobreaker v1.0.0 // indirect
+require (
+	github.com/charmbracelet/bubbles v0.21.0
+	github.com/charmbracelet/bubbletea v1.3.9
+	github.com/charmbracelet/lipgloss v1.1.0
+	github.com/go-resty/resty/v2 v2.16.5
+	github.com/spf13/cobra v1.8.0
+	github.com/spf13/viper v1.21.0
+	github.com/stretchr/testify v1.11.1
+)
+
+require github.com/sony/gobreaker v1.0.0
+
+require (
+	github.com/atotto/clipboard v0.1.4 // indirect
+	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
+	github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc // indirect
+	github.com/charmbracelet/x/ansi v0.10.1 // indirect
+	github.com/charmbracelet/x/cellbuf v0.0.13-0.20250311204145-2c3ea96c31dd // indirect
+	github.com/charmbracelet/x/term v0.2.1 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f // indirect
+	github.com/fsnotify/fsnotify v1.9.0 // indirect
+	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-localereader v0.0.1 // indirect
+	github.com/mattn/go-runewidth v0.0.16 // indirect
+	github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 // indirect
+	github.com/muesli/cancelreader v0.2.2 // indirect
+	github.com/muesli/termenv v0.16.0 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/rivo/uniseg v0.4.7 // indirect
+	github.com/sagikazarmark/locafero v0.11.0 // indirect
+	github.com/sahilm/fuzzy v0.1.1 // indirect
+	github.com/sourcegraph/conc v0.3.1-0.20240121214520-5f936abd7ae8 // indirect
+	github.com/spf13/afero v1.15.0 // indirect
+	github.com/spf13/cast v1.10.0 // indirect
+	github.com/spf13/pflag v1.0.10 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
+	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
+	go.yaml.in/yaml/v3 v3.0.4 // indirect
+	golang.org/x/net v0.33.0 // indirect
+	golang.org/x/sys v0.36.0 // indirect
+	golang.org/x/text v0.28.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1
+)
+

go.sum

@@ -1,6 +1,116 @@
+github.com/atotto/clipboard v0.1.4 h1:EH0zSVneZPSuFR11BlR9YppQTVDbh5+16AmcJi4g1z4=
+github.com/atotto/clipboard v0.1.4/go.mod h1:ZY9tmq7sm5xIbd9bOK4onWV4S6X0u6GY7Vn0Yu86PYI=
+github.com/aymanbagabas/go-osc52/v2 v2.0.1 h1:HwpRHbFMcZLEVr42D4p7XBqjyuxQH5SMiErDT4WkJ2k=
+github.com/aymanbagabas/go-osc52/v2 v2.0.1/go.mod h1:uYgXzlJ7ZpABp8OJ+exZzJJhRNQ2ASbcXHWsFqH8hp8=
+github.com/aymanbagabas/go-udiff v0.2.0 h1:TK0fH4MteXUDspT88n8CKzvK0X9O2xu9yQjWpi6yML8=
+github.com/aymanbagabas/go-udiff v0.2.0/go.mod h1:RE4Ex0qsGkTAJoQdQQCA0uG+nAzJO/pI/QwceO5fgrA=
+github.com/charmbracelet/bubbles v0.21.0 h1:9TdC97SdRVg/1aaXNVWfFH3nnLAwOXr8Fn6u6mfQdFs=
+github.com/charmbracelet/bubbles v0.21.0/go.mod h1:HF+v6QUR4HkEpz62dx7ym2xc71/KBHg+zKwJtMw+qtg=
+github.com/charmbracelet/bubbletea v1.3.9 h1:OBYdfRo6QnlIcXNmcoI2n1NNS65Nk6kI2L2FO1puS/4=
+github.com/charmbracelet/bubbletea v1.3.9/go.mod h1:ORQfo0fk8U+po9VaNvnV95UPWA1BitP1E0N6xJPlHr4=
+github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc h1:4pZI35227imm7yK2bGPcfpFEmuY1gc2YSTShr4iJBfs=
+github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc/go.mod h1:X4/0JoqgTIPSFcRA/P6INZzIuyqdFY5rm8tb41s9okk=
+github.com/charmbracelet/lipgloss v1.1.0 h1:vYXsiLHVkK7fp74RkV7b2kq9+zDLoEU4MZoFqR/noCY=
+github.com/charmbracelet/lipgloss v1.1.0/go.mod h1:/6Q8FR2o+kj8rz4Dq0zQc3vYf7X+B0binUUBwA0aL30=
+github.com/charmbracelet/x/ansi v0.10.1 h1:rL3Koar5XvX0pHGfovN03f5cxLbCF2YvLeyz7D2jVDQ=
+github.com/charmbracelet/x/ansi v0.10.1/go.mod h1:3RQDQ6lDnROptfpWuUVIUG64bD2g2BgntdxH0Ya5TeE=
+github.com/charmbracelet/x/cellbuf v0.0.13-0.20250311204145-2c3ea96c31dd h1:vy0GVL4jeHEwG5YOXDmi86oYw2yuYUGqz6a8sLwg0X8=
+github.com/charmbracelet/x/cellbuf v0.0.13-0.20250311204145-2c3ea96c31dd/go.mod h1:xe0nKWGd3eJgtqZRaN9RjMtK7xUYchjzPr7q6kcvCCs=
+github.com/charmbracelet/x/exp/golden v0.0.0-20241011142426-46044092ad91 h1:payRxjMjKgx2PaCWLZ4p3ro9y97+TVLZNaRZgJwSVDQ=
+github.com/charmbracelet/x/exp/golden v0.0.0-20241011142426-46044092ad91/go.mod h1:wDlXFlCrmJ8J+swcL/MnGUuYnqgQdW9rhSD61oNMb6U=
+github.com/charmbracelet/x/term v0.2.1 h1:AQeHeLZ1OqSXhrAWpYUtZyX1T3zVxfpZuEQMIQaGIAQ=
+github.com/charmbracelet/x/term v0.2.1/go.mod h1:oQ4enTYFV7QN4m0i9mzHrViD7TQKvNEEkHUMCmsxdUg=
+github.com/cpuguy83/go-md2man/v2 v2.0.3/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f h1:Y/CXytFA4m6baUTXGLOoWe4PQhGxaX0KpnayAqC48p4=
+github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f/go.mod h1:vw97MGsxSvLiUE2X8qFplwetxpGLQrlU1Q9AUEIzCaM=
+github.com/frankban/quicktest v1.14.6 h1:7Xjx+VpznH+oBnejlPUj8oUpdxnVs4f8XU8WnHkI4W8=
+github.com/frankban/quicktest v1.14.6/go.mod h1:4ptaffx2x8+WTWXmUCuVU6aPUX1/Mz7zb5vbUoiM6w0=
+github.com/fsnotify/fsnotify v1.9.0 h1:2Ml+OJNzbYCTzsxtv8vKSFD9PbJjmhYF14k/jKC7S9k=
+github.com/fsnotify/fsnotify v1.9.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
+github.com/go-resty/resty/v2 v2.16.5 h1:hBKqmWrr7uRc3euHVqmh1HTHcKn99Smr7o5spptdhTM=
+github.com/go-resty/resty/v2 v2.16.5/go.mod h1:hkJtXbA2iKHzJheXYvQ8snQES5ZLGKMwQ07xAwp/fiA=
+github.com/go-viper/mapstructure/v2 v2.4.0 h1:EBsztssimR/CONLSZZ04E8qAkxNYq4Qp9LvH92wZUgs=
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internal/circuitbreaker/circuitbreaker.go

@@ -1,69 +1,69 @@
 package circuitbreaker
 
 import (
-	"context"
+	"log"
+	"sync"
 	"time"
-
-	"github.com/sony/gobreaker"
 )
 
-// CircuitBreaker wraps gobreaker.CircuitBreaker with context support
 type CircuitBreaker struct {
-	cb *gobreaker.CircuitBreaker
+	state        string // "closed", "open", "half-open"
+	failures     int
+	maxFailures  int
+	resetTimeout time.Duration
+	lastFailure  time.Time
+	mu           sync.Mutex
 }
 
-// New creates a new CircuitBreaker with the given name and settings
+func New(maxFailures int, resetTimeout time.Duration) *CircuitBreaker {
-func New(name string, st gobreaker.Settings) *CircuitBreaker {
 	return &CircuitBreaker{
-		cb: gobreaker.NewCircuitBreaker(st),
+		state:        "closed",
+		maxFailures:  maxFailures,
+		resetTimeout: resetTimeout,
 	}
 }
 
-// Execute runs the given function with circuit breaker protection
+func (cb *CircuitBreaker) AllowRequest() bool {
-func (c *CircuitBreaker) Execute(ctx context.Context, req func() (interface{}, error)) (interface{}, error) {
+	cb.mu.Lock()
-	// Check if context is already canceled
+	defer cb.mu.Unlock()
-	select {
-	case <-ctx.Done():
-		return nil, ctx.Err()
-	default:
-	}
 
-	resultChan := make(chan interface{}, 1)
+	now := time.Now()
-	errChan := make(chan error, 1)
+	if cb.state == "open" {
-
+		if now.Sub(cb.lastFailure) < cb.resetTimeout {
-	go func() {
+			return false
-		res, err := c.cb.Execute(func() (interface{}, error) {
-			return req()
-		})
-		if err != nil {
-			errChan <- err
-			return
 		}
-		resultChan <- res
+		// Timeout expired, transition to half-open
-	}()
+		cb.state = "half-open"
-
+		log.Printf("Circuit breaker transitioning to half-open state")
-	select {
-	case res := <-resultChan:
-		return res, nil
-	case err := <-errChan:
-		return nil, err
-	case <-ctx.Done():
-		return nil, ctx.Err()
 	}
+	return true
 }
 
-// DefaultSettings returns sensible default circuit breaker settings
+func (cb *CircuitBreaker) RecordSuccess() {
-func DefaultSettings(name string) gobreaker.Settings {
+	cb.mu.Lock()
-	return gobreaker.Settings{
+	defer cb.mu.Unlock()
-		Name:        name,
+
-		MaxRequests: 3,
+	if cb.state == "half-open" {
-		Interval:    30 * time.Second,
+		log.Printf("Circuit breaker test request succeeded, closing circuit")
-		Timeout:     60 * time.Second,
+	}
-		ReadyToTrip: func(counts gobreaker.Counts) bool {
+	cb.state = "closed"
-			return counts.ConsecutiveFailures > 5
+	cb.failures = 0
-		},
+}
-		OnStateChange: func(name string, from gobreaker.State, to gobreaker.State) {
+
-			// Log state changes for monitoring
+func (cb *CircuitBreaker) RecordFailure() {
-		},
+	cb.mu.Lock()
+	defer cb.mu.Unlock()
+
+	now := time.Now()
+	cb.failures++
+	cb.lastFailure = now
+
+	if cb.state == "half-open" {
+		// Immediately open the circuit on failure in half-open state
+		log.Printf("Circuit breaker test request failed, reopening circuit")
+		cb.state = "open"
+	} else if cb.failures >= cb.maxFailures {
+		log.Printf("Circuit breaker opened due to %d consecutive failures", cb.failures)
+		cb.state = "open"
 	}
 }

internal/tui/components/chart.go

@@ -4,9 +4,10 @@ import (
 	"fmt"
 	"math"
 	"strings"
+	"time"
 
 	"github.com/charmbracelet/lipgloss"
-	"github.com/sstent/aicyclingcoach-go/fitness-tui/internal/types"
+	"github.com/sstent/fitness-tui/internal/types"
 )
 
 // Chart represents an ASCII chart component
@@ -16,112 +17,209 @@ type Chart struct {
 	Width       int
 	Height      int
 	Color       lipgloss.Color
-	downsampler *types.Downsampler
+	Min, Max    float64
+	Downsampled []types.DownsampledPoint
+	Unit        string
+	Mode        string // "bar" or "sparkline"
+	XLabels     []string
+	YMax        float64
 }
 
-// NewChart creates a new Chart instance
+// NewChart creates a new chart instance
-func NewChart(data []float64, title string) *Chart {
+func NewChart(data []float64, title, unit string, width, height int, color lipgloss.Color) *Chart {
-	return &Chart{
+	c := &Chart{
-		Data:        data,
+		Data:   data,
-		Title:       title,
+		Title:  title,
-		Width:       0, // Will be set based on terminal size
+		Width:  width,
-		Height:      10,
+		Height: height,
-		Color:       lipgloss.Color("39"), // Default blue
+		Color:  color,
-		downsampler: types.NewDownsampler(),
+		Unit:   unit,
+		Mode:   "sparkline",
 	}
-}
 
-// WithSize sets the chart dimensions
+	if len(data) > 0 {
-func (c *Chart) WithSize(width, height int) *Chart {
+		// Use downsampled data for min/max to improve performance
-	c.Width = width
+		// Using empty timestamps array since we only need value downsampling
-	c.Height = height
+		downsampled := types.DownsampleLTTB(data, make([]time.Time, len(data)), width)
+		c.Downsampled = downsampled
+		values := make([]float64, len(downsampled))
+		for i, point := range downsampled {
+			values[i] = point.Value
+		}
+		c.Min, c.Max = minMax(values)
+	}
 	return c
 }
 
-// WithColor sets the chart color
+// NewBarChart creates a bar chart with axis labels
-func (c *Chart) WithColor(color lipgloss.Color) *Chart {
+func NewBarChart(data []float64, title string, width, height int, color lipgloss.Color, xLabels []string, yMax float64) *Chart {
-	c.Color = color
+	c := NewChart(data, title, "", width, height, color)
+	c.Mode = "bar"
+	c.XLabels = xLabels
+	c.YMax = yMax
 	return c
 }
 
 // View renders the chart
 func (c *Chart) View() string {
 	if len(c.Data) == 0 {
-		return fmt.Sprintf("%s\nNo data available", c.Title)
+		return c.renderNoData()
 	}
 
-	// Downsample data if needed
+	if c.Width <= 10 || c.Height <= 4 {
-	processedData := c.downsampler.Process(c.Data, c.Width)
+		return c.renderTooSmall()
+	}
 
-	// Normalize data to chart height
+	if c.Mode == "bar" && c.YMax == 0 {
-	min, max := minMax(processedData)
+		return c.renderNoData()
-	normalized := normalize(processedData, min, max, c.Height-1)
+	}
 
-	// Build chart
+	// Recalculate if dimensions changed
+	if len(c.Downsampled) != c.Width {
+		c.Downsampled = types.DownsampleLTTB(c.Data, make([]time.Time, len(c.Data)), c.Width)
+		values := make([]float64, len(c.Downsampled))
+		for i, point := range c.Downsampled {
+			values[i] = point.Value
+		}
+		c.Min, c.Max = minMax(values)
+	}
+
+	return lipgloss.NewStyle().
+		MaxWidth(c.Width).
+		Render(c.renderTitle() + "\n" + c.renderChart())
+}
+
+func (c *Chart) renderTitle() string {
+	return lipgloss.NewStyle().
+		Bold(true).
+		Foreground(c.Color).
+		Render(c.Title)
+}
+
+func (c *Chart) renderChart() string {
+	if c.Max == c.Min && c.Mode != "bar" {
+		return c.renderConstantData()
+	}
+
+	if c.Mode == "bar" {
+		return c.renderBarChart()
+	}
+	return c.renderSparkline()
+}
+
+func (c *Chart) renderBarChart() string {
 	var sb strings.Builder
-	sb.WriteString(c.Title + "\n")
+	chartHeight := c.Height - 3 // Reserve space for title and labels
 
-	// Create Y-axis labels
+	// Calculate scaling factor
-	yLabels := createYAxisLabels(min, max, c.Height-1)
+	maxValue := c.YMax
+	if maxValue == 0 {
+		maxValue = c.Max
+	}
+	scale := float64(chartHeight-1) / maxValue
 
-	for i := c.Height - 1; i >= 0; i-- {
+	// Y-axis labels
+	yIncrement := maxValue / float64(chartHeight-1)
+	for i := chartHeight - 1; i >= 0; i-- {
+		label := fmt.Sprintf("%3.0f │", maxValue-(yIncrement*float64(i)))
+		sb.WriteString(label)
 		if i == 0 {
-			sb.WriteString("└") // Bottom-left corner
+			sb.WriteString(" " + strings.Repeat("─", c.Width))
-		} else if i == c.Height-1 {
+			break
-			sb.WriteString("↑") // Top axis indicator
-		} else {
-			sb.WriteString("│") // Y-axis line
 		}
 
-		// Add Y-axis label
+		// Draw bars
-		if i < len(yLabels) {
+		for _, point := range c.Downsampled {
-			sb.WriteString(yLabels[i])
+			barHeight := int(math.Round(point.Value * scale))
-		} else {
+			if barHeight >= i {
-			sb.WriteString(" ")
+				sb.WriteString("#")
-		}
-
-		// Add chart bars
-		for j := 0; j < len(normalized); j++ {
-			if i == 0 {
-				sb.WriteString("─") // X-axis
 			} else {
-				if normalized[j] >= float64(i) {
+				sb.WriteString(" ")
-					sb.WriteString("█") // Full block
-				} else {
-					// Gradient blocks based on fractional part
-					frac := normalized[j] - math.Floor(normalized[j])
-					if normalized[j] >= float64(i-1) && frac > 0.75 {
-						sb.WriteString("▇")
-					} else if normalized[j] >= float64(i-1) && frac > 0.5 {
-						sb.WriteString("▅")
-					} else if normalized[j] >= float64(i-1) && frac > 0.25 {
-						sb.WriteString("▃")
-					} else if normalized[j] >= float64(i-1) && frac > 0 {
-						sb.WriteString("▁")
-					} else {
-						sb.WriteString(" ")
-					}
-				}
 			}
 		}
 		sb.WriteString("\n")
 	}
 
-	// Add X-axis title
+	// X-axis labels
-	sb.WriteString(" " + strings.Repeat(" ", len(yLabels[0])+1) + "→ Time\n")
+	sb.WriteString("\n    ")
+	for i, label := range c.XLabels {
+		if i >= len(c.Downsampled) {
+			break
+		}
+		if i == 0 {
+			sb.WriteString(" ")
+		}
+		sb.WriteString(fmt.Sprintf("%-*s", c.Width/len(c.XLabels), label))
+	}
 
-	// Apply color styling
+	return sb.String()
-	style := lipgloss.NewStyle().Foreground(c.Color)
+}
-	return style.Render(sb.String())
+
+func (c *Chart) renderSparkline() string {
+	var sb strings.Builder
+	chartHeight := c.Height - 3 // Reserve rows for title and labels
+
+	minLabel := fmt.Sprintf("%.0f%s", c.Min, c.Unit)
+	maxLabel := fmt.Sprintf("%.0f%s", c.Max, c.Unit)
+	sb.WriteString(fmt.Sprintf("%5s ", maxLabel))
+
+	for i, point := range c.Downsampled {
+		if i >= c.Width {
+			break
+		}
+
+		normalized := (point.Value - c.Min) / (c.Max - c.Min)
+		barHeight := int(math.Round(normalized * float64(chartHeight-1)))
+		sb.WriteString(c.renderBar(barHeight, chartHeight))
+	}
+	sb.WriteString("\n")
+
+	// Add X axis with min label
+	sb.WriteString(fmt.Sprintf("%5s ", minLabel))
+	sb.WriteString(strings.Repeat("─", c.Width))
+	return sb.String()
+}
+
+func (c *Chart) renderBar(height, maxHeight int) string {
+	if height <= 0 {
+		return " "
+	}
+
+	// Use Unicode block characters for better resolution
+	blocks := []string{" ", "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█"}
+	index := int(float64(height) / float64(maxHeight) * 8)
+	if index >= len(blocks) {
+		index = len(blocks) - 1
+	}
+
+	return lipgloss.NewStyle().
+		Foreground(c.Color).
+		Render(blocks[index])
+}
+
+func (c *Chart) renderNoData() string {
+	return lipgloss.NewStyle().
+		Foreground(lipgloss.Color("240")).
+		Render(fmt.Sprintf("%s: No data", c.Title))
+}
+
+func (c *Chart) renderTooSmall() string {
+	return lipgloss.NewStyle().
+		Foreground(lipgloss.Color("196")).
+		Render(fmt.Sprintf("%s: Terminal too small", c.Title))
+}
+
+func (c *Chart) renderConstantData() string {
+	return lipgloss.NewStyle().
+		Foreground(lipgloss.Color("214")).
+		Render(fmt.Sprintf("%s: Constant value %.2f", c.Title, c.Data[0]))
 }
 
-// minMax finds min and max values in a slice
 func minMax(data []float64) (min, max float64) {
 	if len(data) == 0 {
 		return 0, 0
 	}
-	min = data[0]
+	min, max = data[0], data[0]
-	max = data[0]
 	for _, v := range data {
 		if v < min {
 			min = v
@@ -132,34 +230,3 @@ func minMax(data []float64) (min, max float64) {
 	}
 	return min, max
 }
-
-// normalize scales values to fit within chart height
-func normalize(data []float64, min, max float64, height int) []float64 {
-	if max == min || height <= 0 {
-		return make([]float64, len(data))
-	}
-
-	scale := float64(height) / (max - min)
-	normalized := make([]float64, len(data))
-	for i, v := range data {
-		normalized[i] = (v - min) * scale
-	}
-	return normalized
-}
-
-// createYAxisLabels creates labels for Y-axis
-func createYAxisLabels(min, max float64, height int) []string {
-	labels := make([]string, height+1)
-	step := (max - min) / float64(height)
-
-	for i := 0; i <= height; i++ {
-		value := min + float64(i)*step
-		label := fmt.Sprintf("%.0f", value)
-		// Pad to consistent width (5 characters)
-		if len(label) < 5 {
-			label = strings.Repeat(" ", 5-len(label)) + label
-		}
-		labels[height-i] = label
-	}
-	return labels
-}

internal/types/downsample.go

@@ -1,63 +1,84 @@
 package types
 
-// Downsampler implements the Largest-Triangle-Three-Buckets algorithm
+import "time"
-type Downsampler struct{}
 
-// NewDownsampler creates a new Downsampler instance
+type DownsampledPoint struct {
-func NewDownsampler() *Downsampler {
+	Timestamp time.Time
-	return &Downsampler{}
+	Value     float64
 }
 
-// Process downsamples data using Largest-Triangle-Three-Buckets algorithm
+// DownsampleLTTB implements the Largest Triangle Three Buckets algorithm
-func (d *Downsampler) Process(data []float64, threshold int) []float64 {
+// for time series downsampling. This is a corrected version that properly
-	if len(data) <= threshold || threshold <= 0 {
+// uses the current module path.
-		return data
+func DownsampleLTTB(data []float64, timestamps []time.Time, threshold int) []DownsampledPoint {
+	if len(data) != len(timestamps) {
+		panic("data and timestamps must be same length")
 	}
 
-	sampled := make([]float64, 0, threshold)
+	if threshold >= len(data) || threshold <= 0 {
-	sampled = append(sampled, data[0]) // First point
+		result := make([]DownsampledPoint, len(data))
+		for i := range data {
+			result[i] = DownsampledPoint{
+				Timestamp: timestamps[i],
+				Value:     data[i],
+			}
+		}
+		return result
+	}
+
+	sampled := make([]DownsampledPoint, threshold)
+	sampled[0] = DownsampledPoint{Timestamp: timestamps[0], Value: data[0]}
 
 	bucketSize := float64(len(data)-2) / float64(threshold-2)
+	a := 0
 
-	for i := 1; i < threshold-1; i++ {
+	for i := 0; i < threshold-2; i++ {
-		bucketStart := int(float64(i-1)*bucketSize) + 1
+		avgRangeStart := int(float64(i+1)*bucketSize) + 1
-		bucketEnd := int(float64(i)*bucketSize) + 1
+		avgRangeEnd := int(float64(i+2)*bucketSize) + 1
+		if avgRangeEnd > len(data) {
+			avgRangeEnd = len(data)
+		}
 
-		if bucketEnd >= len(data) {
+		var avgRange float64
-			bucketEnd = len(data) - 1
+		for j := avgRangeStart; j < avgRangeEnd; j++ {
+			avgRange += data[j]
+		}
+		avgRange /= float64(avgRangeEnd - avgRangeStart)
+
+		rangeOffs := int(float64(i)*bucketSize) + 1
+		rangeTo := int(float64(i+1)*bucketSize) + 1
+		if rangeTo > len(data) {
+			rangeTo = len(data)
 		}
 
 		maxArea := -1.0
-		selectedPoint := data[bucketStart]
+		nextAAt := 0
-
+		for j := rangeOffs; j < rangeTo; j++ {
-		for j := bucketStart; j < bucketEnd; j++ {
+			area := areaSize(
-			area := triangleArea(
+				data[a],
-				data[bucketStart-1],
 				data[j],
-				data[bucketEnd],
+				avgRange,
 			)
-
 			if area > maxArea {
 				maxArea = area
-				selectedPoint = data[j]
+				nextAAt = j
 			}
 		}
 
-		sampled = append(sampled, selectedPoint)
+		sampled[i+1] = DownsampledPoint{
+			Timestamp: timestamps[nextAAt],
+			Value:     data[nextAAt],
+		}
+		a = nextAAt
 	}
 
-	sampled = append(sampled, data[len(data)-1]) // Last point
+	sampled[threshold-1] = DownsampledPoint{
+		Timestamp: timestamps[len(timestamps)-1],
+		Value:     data[len(data)-1],
+	}
 	return sampled
 }
 
-// triangleArea calculates the area of a triangle formed by three points
+func areaSize(a, b, avg float64) float64 {
-func triangleArea(a, b, c float64) float64 {
+	return (a-avg)*(a-avg) + (b-avg)*(b-avg)
-	return abs((a-b)*(c-b)-(b-c)*(a-c)) / 2
-}
-
-func abs(x float64) float64 {
-	if x < 0 {
-		return -x
-	}
-	return x
 }