from typing import Optional

from fastapi import APIRouter, HTTPException
from pydantic import BaseModel

from garminsync.database import Activity, DaemonConfig, SyncLog, get_session

router = APIRouter(prefix="/api")


class ScheduleConfig(BaseModel):
    enabled: bool
    cron_schedule: str


@router.get("/status")
async def get_status():
    """Get current daemon status"""
    session = get_session()
    try:
        config = session.query(DaemonConfig).first()

        # Get recent logs
        logs = session.query(SyncLog).order_by(SyncLog.timestamp.desc()).limit(10).all()

        # Convert to dictionaries to avoid session issues
        daemon_data = {
            "running": config.status == "running" if config else False,
            "next_run": config.next_run if config else None,
            "schedule": config.schedule_cron if config else None,
            "last_run": config.last_run if config else None,
            "enabled": config.enabled if config else False,
        }

        log_data = []
        for log in logs:
            log_data.append(
                {
                    "timestamp": log.timestamp,
                    "operation": log.operation,
                    "status": log.status,
                    "message": log.message,
                    "activities_processed": log.activities_processed,
                    "activities_downloaded": log.activities_downloaded,
                }
            )

        return {"daemon": daemon_data, "recent_logs": log_data}
    finally:
        session.close()


@router.post("/schedule")
async def update_schedule(config: ScheduleConfig):
    """Update daemon schedule configuration"""
    session = get_session()
    try:
        daemon_config = session.query(DaemonConfig).first()

        if not daemon_config:
            daemon_config = DaemonConfig()
            session.add(daemon_config)

        daemon_config.enabled = config.enabled
        daemon_config.schedule_cron = config.cron_schedule
        session.commit()

        return {"message": "Configuration updated successfully"}
    except Exception as e:
        session.rollback()
        raise HTTPException(
            status_code=500, detail=f"Failed to update configuration: {str(e)}"
        )
    finally:
        session.close()


@router.post("/sync/trigger")
async def trigger_sync():
    """Manually trigger a sync operation"""
    try:
        # Import here to avoid circular imports
        import os
        from datetime import datetime
        from pathlib import Path

        from garminsync.database import Activity, sync_database
        from garminsync.garmin import GarminClient

        # Create client and sync
        client = GarminClient()
        sync_database(client)

        # Download missing activities
        session = get_session()
        try:
            missing_activities = (
                session.query(Activity).filter_by(downloaded=False).all()
            )
            downloaded_count = 0

            data_dir = Path(os.getenv("DATA_DIR", "data"))
            data_dir.mkdir(parents=True, exist_ok=True)

            for activity in missing_activities:
                try:
                    fit_data = client.download_activity_fit(activity.activity_id)

                    timestamp = activity.start_time.replace(":", "-").replace(" ", "_")
                    filename = f"activity_{activity.activity_id}_{timestamp}.fit"
                    filepath = data_dir / filename

                    with open(filepath, "wb") as f:
                        f.write(fit_data)

                    activity.filename = str(filepath)
                    activity.downloaded = True
                    activity.last_sync = datetime.now().isoformat()
                    downloaded_count += 1
                    session.commit()

                except Exception as e:
                    print(f"Failed to download activity {activity.activity_id}: {e}")
                    session.rollback()

            return {
                "message": f"Sync completed successfully. Downloaded {downloaded_count} activities."
            }
        finally:
            session.close()

    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Sync failed: {str(e)}")


@router.get("/activities/stats")
async def get_activity_stats():
    """Get activity statistics"""
    from garminsync.database import get_offline_stats

    return get_offline_stats()


@router.get("/logs")
async def get_logs(
    status: str = None,
    operation: str = None,
    date: str = None,
    page: int = 1,
    per_page: int = 20,
):
    """Get sync logs with filtering and pagination"""
    session = get_session()
    try:
        query = session.query(SyncLog)

        # Apply filters
        if status:
            query = query.filter(SyncLog.status == status)
        if operation:
            query = query.filter(SyncLog.operation == operation)
        if date:
            # Filter by date (assuming ISO format)
            query = query.filter(SyncLog.timestamp.like(f"{date}%"))

        # Get total count for pagination
        total = query.count()

        # Apply pagination
        logs = (
            query.order_by(SyncLog.timestamp.desc())
            .offset((page - 1) * per_page)
            .limit(per_page)
            .all()
        )

        log_data = []
        for log in logs:
            log_data.append(
                {
                    "id": log.id,
                    "timestamp": log.timestamp,
                    "operation": log.operation,
                    "status": log.status,
                    "message": log.message,
                    "activities_processed": log.activities_processed,
                    "activities_downloaded": log.activities_downloaded,
                }
            )

        return {"logs": log_data, "total": total, "page": page, "per_page": per_page}
    finally:
        session.close()


@router.post("/daemon/start")
async def start_daemon():
    """Start the daemon process"""
    from garminsync.daemon import daemon_instance

    try:
        # Start the daemon in a separate thread to avoid blocking
        import threading

        daemon_thread = threading.Thread(target=daemon_instance.start)
        daemon_thread.daemon = True
        daemon_thread.start()

        # Update daemon status in database
        session = get_session()
        config = session.query(DaemonConfig).first()
        if not config:
            config = DaemonConfig()
            session.add(config)
        config.status = "running"
        session.commit()

        return {"message": "Daemon started successfully"}
    except Exception as e:
        session.rollback()
        raise HTTPException(status_code=500, detail=f"Failed to start daemon: {str(e)}")
    finally:
        session.close()


@router.post("/daemon/stop")
async def stop_daemon():
    """Stop the daemon process"""
    from garminsync.daemon import daemon_instance

    try:
        # Stop the daemon
        daemon_instance.stop()

        # Update daemon status in database
        session = get_session()
        config = session.query(DaemonConfig).first()
        if config:
            config.status = "stopped"
            session.commit()

        return {"message": "Daemon stopped successfully"}
    except Exception as e:
        session.rollback()
        raise HTTPException(status_code=500, detail=f"Failed to stop daemon: {str(e)}")
    finally:
        session.close()


@router.delete("/logs")
async def clear_logs():
    """Clear all sync logs"""
    session = get_session()
    try:
        session.query(SyncLog).delete()
        session.commit()
        return {"message": "Logs cleared successfully"}
    except Exception as e:
        session.rollback()
        raise HTTPException(status_code=500, detail=f"Failed to clear logs: {str(e)}")
    finally:
        session.close()


@router.get("/activities")
async def get_activities(
    page: int = 1,
    per_page: int = 50,
    activity_type: str = None,
    date_from: str = None,
    date_to: str = None,
):
    """Get paginated activities with filtering"""
    session = get_session()
    try:
        query = session.query(Activity)

        # Apply filters
        if activity_type:
            query = query.filter(Activity.activity_type == activity_type)
        if date_from:
            query = query.filter(Activity.start_time >= date_from)
        if date_to:
            query = query.filter(Activity.start_time <= date_to)

        # Get total count for pagination
        total = query.count()

        # Apply pagination
        activities = (
            query.order_by(Activity.start_time.desc())
            .offset((page - 1) * per_page)
            .limit(per_page)
            .all()
        )

        activity_data = []
        for activity in activities:
            activity_data.append(
                {
                    "activity_id": activity.activity_id,
                    "start_time": activity.start_time,
                    "activity_type": activity.activity_type,
                    "duration": activity.duration,
                    "distance": activity.distance,
                    "max_heart_rate": activity.max_heart_rate,
                    "avg_power": activity.avg_power,
                    "calories": activity.calories,
                    "filename": activity.filename,
                    "downloaded": activity.downloaded,
                    "created_at": activity.created_at,
                    "last_sync": activity.last_sync,
                }
            )

        return {
            "activities": activity_data,
            "total": total,
            "page": page,
            "per_page": per_page,
        }
    finally:
        session.close()


@router.get("/activities/{activity_id}")
async def get_activity_details(activity_id: int):
    """Get detailed activity information"""
    session = get_session()
    try:
        activity = (
            session.query(Activity).filter(Activity.activity_id == activity_id).first()
        )
        if not activity:
            raise HTTPException(
                status_code=404, detail=f"Activity with ID {activity_id} not found"
            )

        return {
            "id": activity.activity_id,
            "name": activity.filename or "Unnamed Activity",
            "distance": activity.distance,
            "duration": activity.duration,
            "start_time": activity.start_time,
            "activity_type": activity.activity_type,
            "max_heart_rate": activity.max_heart_rate,
            "avg_power": activity.avg_power,
            "calories": activity.calories,
            "filename": activity.filename,
            "downloaded": activity.downloaded,
            "created_at": activity.created_at,
            "last_sync": activity.last_sync,
        }
    finally:
        session.close()


@router.get("/dashboard/stats")
async def get_dashboard_stats():
    """Get comprehensive dashboard statistics"""
    from garminsync.database import get_offline_stats

    return get_offline_stats()


@router.get("/api/activities")
async def get_api_activities(page: int = 1, per_page: int = 10):
    """Get paginated activities for API"""
    session = get_session()
    try:
        # Use the existing get_paginated method from Activity class
        pagination = Activity.get_paginated(page, per_page)
        activities = pagination.items
        total_pages = pagination.pages
        current_page = pagination.page
        total_items = pagination.total

        if not activities and page > 1:
            raise HTTPException(
                status_code=404, detail=f"No activities found for page {page}"
            )

        if not activities and page == 1 and total_items == 0:
            raise HTTPException(status_code=404, detail="No activities found")

        if not activities:
            raise HTTPException(status_code=404, detail="No activities found")

        return {
            "activities": [
                {
                    "id": activity.activity_id,
                    "name": activity.filename or "Unnamed Activity",
                    "distance": activity.distance,
                    "duration": activity.duration,
                    "start_time": activity.start_time,
                    "activity_type": activity.activity_type,
                    "max_heart_rate": activity.max_heart_rate,
                    "avg_power": activity.avg_power,
                    "calories": activity.calories,
                    "downloaded": activity.downloaded,
                    "created_at": activity.created_at,
                    "last_sync": activity.last_sync,
                    "device": activity.device or "Unknown",
                    "intensity": activity.intensity or "Unknown",
                    "average_speed": activity.average_speed,
                    "elevation_gain": activity.elevation_gain,
                    "heart_rate_zones": activity.heart_rate_zones or [],
                    "power_zones": activity.power_zones or [],
                    "training_effect": activity.training_effect or 0,
                    "training_effect_label": activity.training_effect_label
                    or "Unknown",
                }
                for activity in activities
            ],
            "total_pages": total_pages,
            "current_page": current_page,
            "total_items": total_items,
            "page_size": per_page,
            "status": "success",
        }
    except Exception as e:
        raise HTTPException(
            status_code=500,
            detail=f"An error occurred while fetching activities: {str(e)}",
        )
    finally:
        session.close()