# app/tasks/celery_tasks/export.py
"""
Celery tasks for product export operations.

Handles exporting vendor products to various formats (e.g., Letzshop CSV).
"""

import logging
import os
from datetime import UTC, datetime
from pathlib import Path

from app.core.celery_config import celery_app
from app.tasks.celery_tasks.base import DatabaseTask
from models.database.vendor import Vendor

logger = logging.getLogger(__name__)


@celery_app.task(
    bind=True,
    base=DatabaseTask,
    name="app.tasks.celery_tasks.export.export_vendor_products_to_folder",
    max_retries=3,
    default_retry_delay=60,
)
def export_vendor_products_to_folder(
    self,
    vendor_id: int,
    triggered_by: str,
    include_inactive: bool = False,
):
    """
    Export all 3 languages (en, fr, de) to disk asynchronously.

    Args:
        vendor_id: ID of the vendor to export
        triggered_by: User identifier who triggered the export
        include_inactive: Whether to include inactive products

    Returns:
        dict: Export results per language with file paths
    """
    from app.services.letzshop_export_service import letzshop_export_service

    languages = ["en", "fr", "de"]
    results = {}
    export_dir = None

    with self.get_db() as db:
        # Get vendor info
        vendor = db.query(Vendor).filter(Vendor.id == vendor_id).first()
        if not vendor:
            logger.error(f"Vendor {vendor_id} not found for export")
            return {"error": f"Vendor {vendor_id} not found"}

        vendor_code = vendor.vendor_code

        # Create export directory
        export_dir = Path(f"exports/letzshop/{vendor_code}")
        export_dir.mkdir(parents=True, exist_ok=True)

        started_at = datetime.now(UTC)
        logger.info(f"Starting product export for vendor {vendor_code} (ID: {vendor_id})")

        for lang in languages:
            try:
                # Generate CSV content
                csv_content = letzshop_export_service.export_vendor_products(
                    db=db,
                    vendor_id=vendor_id,
                    language=lang,
                    include_inactive=include_inactive,
                )

                # Write to file
                file_name = f"{vendor_code}_products_{lang}.csv"
                file_path = export_dir / file_name

                with open(file_path, "w", encoding="utf-8") as f:
                    f.write(csv_content)

                results[lang] = {
                    "success": True,
                    "path": str(file_path),
                    "file_name": file_name,
                }

                logger.info(f"Exported {lang} products to {file_path}")

            except Exception as e:
                logger.error(f"Error exporting {lang} products for vendor {vendor_id}: {e}")
                results[lang] = {
                    "success": False,
                    "error": str(e),
                }

        # Log the export
        completed_at = datetime.now(UTC)
        duration = (completed_at - started_at).total_seconds()
        success_count = sum(1 for r in results.values() if r.get("success"))

        try:
            letzshop_export_service.log_export(
                db=db,
                vendor_id=vendor_id,
                triggered_by=triggered_by,
                records_processed=len(languages),
                records_succeeded=success_count,
                records_failed=len(languages) - success_count,
                duration_seconds=duration,
            )
            db.commit()
        except Exception as e:
            logger.error(f"Failed to log export: {e}")

        logger.info(
            f"Product export complete for vendor {vendor_code}: "
            f"{success_count}/{len(languages)} languages exported in {duration:.2f}s"
        )

        return {
            "vendor_id": vendor_id,
            "vendor_code": vendor_code,
            "export_dir": str(export_dir),
            "results": results,
            "duration_seconds": duration,
            "triggered_by": triggered_by,
        }


@celery_app.task(
    bind=True,
    base=DatabaseTask,
    name="app.tasks.celery_tasks.export.export_marketplace_products",
    max_retries=3,
    default_retry_delay=60,
)
def export_marketplace_products(
    self,
    language: str = "en",
    triggered_by: str = "system",
):
    """
    Export all marketplace products (admin use).

    Args:
        language: Language code for export (en, fr, de)
        triggered_by: User identifier who triggered the export

    Returns:
        dict: Export result with file path
    """
    from app.services.letzshop_export_service import letzshop_export_service

    with self.get_db() as db:
        started_at = datetime.now(UTC)
        logger.info(f"Starting marketplace product export ({language})")

        try:
            # Create export directory
            export_dir = Path("exports/marketplace")
            export_dir.mkdir(parents=True, exist_ok=True)

            # Generate CSV content
            csv_content = letzshop_export_service.export_marketplace_products(
                db=db,
                language=language,
            )

            # Write to file
            timestamp = started_at.strftime("%Y%m%d_%H%M%S")
            file_name = f"marketplace_products_{language}_{timestamp}.csv"
            file_path = export_dir / file_name

            with open(file_path, "w", encoding="utf-8") as f:
                f.write(csv_content)

            completed_at = datetime.now(UTC)
            duration = (completed_at - started_at).total_seconds()

            logger.info(f"Marketplace export complete: {file_path} ({duration:.2f}s)")

            return {
                "success": True,
                "path": str(file_path),
                "file_name": file_name,
                "language": language,
                "duration_seconds": duration,
                "triggered_by": triggered_by,
            }

        except Exception as e:
            logger.error(f"Error exporting marketplace products: {e}")
            return {
                "success": False,
                "error": str(e),
                "language": language,
            }