"""Update management API endpoints.

Refactored to use UpdateService for all business logic.
Endpoints are now thin adapters that convert HTTP requests/responses.
"""
from typing import Optional
from fastapi import APIRouter, HTTPException
from pydantic import BaseModel

from ..services.container import container
from ..managers.ble_manager import get_ble_manager, NotificationType


router = APIRouter()


class UpdateCheckResponse(BaseModel):
    """Response model for update check."""
    update_available: bool
    current_version: str
    latest_version: Optional[str] = None
    release_date: Optional[str] = None
    changelog: Optional[str] = None
    is_prerelease: bool = False
    download_size: Optional[int] = None
    message: Optional[str] = None


class UpdateProgressResponse(BaseModel):
    """Response model for update progress."""
    status: str
    current_version: str
    available_version: Optional[str] = None
    download_progress: float = 0.0
    error_message: Optional[str] = None
    last_check: Optional[str] = None


class ReleaseNotesRequest(BaseModel):
    """Request model for release notes."""
    version: Optional[str] = None


def _service_error_to_http_status(error_code: str) -> int:
    """Map service error codes to HTTP status codes.

    Args:
        error_code: Service error code

    Returns:
        HTTP status code
    """
    codes = {
        "update_check_error": 500,
        "no_update_available": 400,
        "download_failed": 500,
        "update_download_error": 500,
        "no_update_downloaded": 400,
        "installation_failed": 500,
        "update_install_error": 500,
        "progress_error": 500,
        "release_notes_error": 500,
        "check_download_error": 500,
        "full_update_error": 500,
    }
    return codes.get(error_code, 500)


@router.get("/check", response_model=UpdateCheckResponse)
async def check_for_updates():
    """Check for available updates.

    Uses UpdateService for business logic.
    """
    result = await container.update_service.check_for_updates()

    if not result.success:
        raise HTTPException(
            status_code=_service_error_to_http_status(result.error.code),
            detail=result.error.message
        )

    # Send BLE notification if update is available
    if result.data.get("update_available"):
        try:
            ble_manager = get_ble_manager()
            await ble_manager.send_notification(
                NotificationType.UPDATE_AVAILABLE,
                f"Update available: v{result.data['latest_version']}",
                {"version": result.data["latest_version"]}
            )
        except Exception:
            # BLE notification failure shouldn't affect the response
            pass

    return UpdateCheckResponse(**result.data)


@router.get("/progress", response_model=UpdateProgressResponse)
async def get_update_progress():
    """Get current update progress.

    Uses UpdateService for business logic.
    """
    result = await container.update_service.get_progress()

    if not result.success:
        raise HTTPException(
            status_code=_service_error_to_http_status(result.error.code),
            detail=result.error.message
        )

    return UpdateProgressResponse(**result.data)


@router.post("/download")
async def download_update():
    """Download the available update.

    Uses UpdateService for business logic.
    """
    result = await container.update_service.download_update()

    if not result.success:
        raise HTTPException(
            status_code=_service_error_to_http_status(result.error.code),
            detail=result.error.message
        )

    return {"message": result.data["message"]}


@router.post("/install")
async def install_update():
    """Install the downloaded update.

    Uses UpdateService for business logic.
    """
    result = await container.update_service.install_update()

    if not result.success:
        raise HTTPException(
            status_code=_service_error_to_http_status(result.error.code),
            detail=result.error.message
        )

    # Send BLE notification
    try:
        ble_manager = get_ble_manager()
        await ble_manager.send_notification(
            NotificationType.UPDATE_COMPLETE,
            "Update installed successfully",
            {"restart_required": True}
        )
    except Exception:
        # BLE notification failure shouldn't affect the response
        pass

    return {
        "message": result.data["message"],
        "restart_required": result.data.get("requires_restart", True)
    }


@router.post("/release-notes", response_model=dict)
async def get_release_notes(request: ReleaseNotesRequest):
    """Get release notes for a specific version.

    Uses UpdateService for business logic.

    Args:
        request: Version to get notes for (latest if not specified)
    """
    result = await container.update_service.get_release_notes(request.version)

    if not result.success:
        raise HTTPException(
            status_code=_service_error_to_http_status(result.error.code),
            detail=result.error.message
        )

    return {
        "version": result.data["version"],
        "notes": result.data["release_notes"]
    }


@router.get("/current-version")
async def get_current_version():
    """Get current system version.

    Uses UpdateService for business logic.
    """
    result = await container.update_service.get_progress()

    if not result.success:
        raise HTTPException(
            status_code=_service_error_to_http_status(result.error.code),
            detail=result.error.message
        )

    return {
        "version": result.data["current_version"],
        "last_check": result.data["last_check"]
    }