# app/modules/marketplace/services/marketplace_widgets.py
"""
Marketplace dashboard widget provider.

Provides widgets for marketplace-related data on store and admin dashboards.
Implements the DashboardWidgetProviderProtocol.

Widgets provided:
- recent_imports: List of recent import jobs with status
"""

import logging

from sqlalchemy.orm import Session

from app.modules.contracts.widgets import (
    BreakdownWidget,
    DashboardWidget,
    ListWidget,
    WidgetBreakdownItem,
    WidgetContext,
    WidgetListItem,
)

logger = logging.getLogger(__name__)


class MarketplaceWidgetProvider:
    """
    Widget provider for marketplace module.

    Provides dashboard widgets for import jobs and other marketplace data.
    """

    @property
    def widgets_category(self) -> str:
        return "marketplace"

    def _map_status_to_display(self, status: str) -> str:
        """Map job status to widget status indicator."""
        status_map = {
            "pending": "neutral",
            "processing": "warning",
            "completed": "success",
            "completed_with_errors": "warning",
            "failed": "error",
        }
        return status_map.get(status, "neutral")

    def get_store_widgets(
        self,
        db: Session,
        store_id: int,
        context: WidgetContext | None = None,
    ) -> list[DashboardWidget]:
        """
        Get marketplace widgets for a store dashboard.

        Args:
            db: Database session
            store_id: ID of the store
            context: Optional filtering/scoping context

        Returns:
            List of DashboardWidget objects for the store
        """
        from app.modules.marketplace.models import MarketplaceImportJob

        limit = context.limit if context else 5

        # Get recent imports for this store
        jobs = (
            db.query(MarketplaceImportJob)
            .filter(MarketplaceImportJob.store_id == store_id)
            .order_by(MarketplaceImportJob.created_at.desc())
            .limit(limit)
            .all()
        )

        items = [
            WidgetListItem(
                id=job.id,
                title=f"Import #{job.id}",
                subtitle=f"{job.marketplace} - {job.language.upper()}",
                status=self._map_status_to_display(job.status),
                timestamp=job.created_at,
                url=f"/store/marketplace/imports/{job.id}",
                metadata={
                    "total_processed": job.total_processed or 0,
                    "imported_count": job.imported_count or 0,
                    "error_count": job.error_count or 0,
                    "status": job.status,
                },
            )
            for job in jobs
        ]

        # Get total count for "view all" indicator
        total_count = (
            db.query(MarketplaceImportJob)
            .filter(MarketplaceImportJob.store_id == store_id)
            .count()
        )

        return [
            DashboardWidget(
                key="marketplace.recent_imports",
                widget_type="list",
                title="Recent Imports",
                category="marketplace",
                data=ListWidget(
                    items=items,
                    total_count=total_count,
                    view_all_url="/store/marketplace/imports",
                ),
                icon="download",
                description="Latest product import jobs",
                order=20,
            )
        ]

    def get_platform_widgets(
        self,
        db: Session,
        platform_id: int,
        context: WidgetContext | None = None,
    ) -> list[DashboardWidget]:
        """
        Get marketplace widgets for the admin/platform dashboard.

        Args:
            db: Database session
            platform_id: ID of the platform
            context: Optional filtering/scoping context

        Returns:
            List of DashboardWidget objects for the platform
        """
        from sqlalchemy.orm import joinedload

        from app.modules.marketplace.models import MarketplaceImportJob
        from app.modules.tenancy.services.platform_service import platform_service

        limit = context.limit if context else 5

        # Get store IDs for this platform via platform service
        store_ids = platform_service.get_store_ids_for_platform(db, platform_id)

        # Get recent imports across all stores in the platform
        jobs = (
            db.query(MarketplaceImportJob)
            .options(joinedload(MarketplaceImportJob.store))
            .filter(MarketplaceImportJob.store_id.in_(store_ids))
            .order_by(MarketplaceImportJob.created_at.desc())
            .limit(limit)
            .all()
        )

        items = [
            WidgetListItem(
                id=job.id,
                title=f"Import #{job.id}",
                subtitle=job.store.name if job.store else "Unknown Store",
                status=self._map_status_to_display(job.status),
                timestamp=job.created_at,
                url=f"/admin/marketplace/imports/{job.id}",
                metadata={
                    "store_id": job.store_id,
                    "store_code": job.store.store_code if job.store else None,
                    "marketplace": job.marketplace,
                    "total_processed": job.total_processed or 0,
                    "imported_count": job.imported_count or 0,
                    "error_count": job.error_count or 0,
                    "status": job.status,
                },
            )
            for job in jobs
        ]

        # Get total count for platform
        total_count = (
            db.query(MarketplaceImportJob)
            .filter(MarketplaceImportJob.store_id.in_(store_ids_subquery))
            .count()
        )

        widgets = [
            DashboardWidget(
                key="marketplace.recent_imports",
                widget_type="list",
                title="Recent Imports",
                category="marketplace",
                data=ListWidget(
                    items=items,
                    total_count=total_count,
                    view_all_url="/admin/marketplace/letzshop",
                ),
                icon="download",
                description="Latest product import jobs across all stores",
                order=20,
            )
        ]

        # Add marketplace breakdown widget
        breakdown_widget = self._get_marketplace_breakdown_widget(db)
        if breakdown_widget:
            widgets.append(breakdown_widget)

        return widgets

    def _get_marketplace_breakdown_widget(
        self,
        db: Session,
    ) -> DashboardWidget | None:
        """
        Get a breakdown widget showing statistics per marketplace.

        Returns:
            DashboardWidget with BreakdownWidget data, or None if no data
        """
        from sqlalchemy import func

        from app.modules.marketplace.models import MarketplaceProduct

        try:
            marketplace_stats = (
                db.query(
                    MarketplaceProduct.marketplace,
                    func.count(MarketplaceProduct.id).label("total_products"),
                    func.count(func.distinct(MarketplaceProduct.store_name)).label(
                        "unique_stores"
                    ),
                    func.count(func.distinct(MarketplaceProduct.brand)).label(
                        "unique_brands"
                    ),
                )
                .filter(MarketplaceProduct.marketplace.isnot(None))
                .group_by(MarketplaceProduct.marketplace)
                .all()
            )

            if not marketplace_stats:
                return None

            total_products = sum(stat.total_products for stat in marketplace_stats)

            breakdown_items = [
                WidgetBreakdownItem(
                    label=stat.marketplace or "Unknown",
                    value=stat.total_products,
                    secondary_value=stat.unique_stores,
                    percentage=(
                        round(stat.total_products / total_products * 100, 1)
                        if total_products > 0
                        else 0
                    ),
                    icon="globe",
                )
                for stat in marketplace_stats
            ]

            return DashboardWidget(
                key="marketplace.breakdown",
                widget_type="breakdown",
                title="Products by Marketplace",
                category="marketplace",
                data=BreakdownWidget(
                    items=breakdown_items,
                    total=total_products,
                ),
                icon="chart-pie",
                description="Product distribution across marketplaces",
                order=30,
            )

        except Exception as e:
            logger.warning(f"Failed to get marketplace breakdown widget: {e}")
            return None


# Singleton instance
marketplace_widget_provider = MarketplaceWidgetProvider()

__all__ = ["MarketplaceWidgetProvider", "marketplace_widget_provider"]