# File and media management
# app/api/v1/vendor/media.py
"""
Vendor media and file management endpoints.

Vendor Context: Uses token_vendor_id from JWT token (authenticated vendor API pattern)
"""

import logging

from fastapi import APIRouter, Depends, File, Query, UploadFile
from sqlalchemy.orm import Session

from app.api.deps import get_current_vendor_api
from app.core.database import get_db
from app.exceptions import InvalidTokenException
from app.services.vendor_service import vendor_service
from models.database.user import User

router = APIRouter(prefix="/media")
logger = logging.getLogger(__name__)


def _get_vendor_from_token(current_user: User, db: Session):
    """Helper to get vendor from JWT token."""
    if not hasattr(current_user, "token_vendor_id"):
        raise InvalidTokenException("Token missing vendor information. Please login again.")
    return vendor_service.get_vendor_by_id(db, current_user.token_vendor_id)


@router.get("")
def get_media_library(
    skip: int = Query(0, ge=0),
    limit: int = Query(100, ge=1, le=1000),
    media_type: str | None = Query(None, description="image, video, document"),
    search: str | None = Query(None),
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Get vendor media library.

    TODO: Implement in Slice 3
    - Get all media files for vendor
    - Filter by type (image, video, document)
    - Search by filename
    - Support pagination
    - Return file URLs, sizes, metadata
    """
    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
    return {
        "media": [],
        "total": 0,
        "skip": skip,
        "limit": limit,
        "message": "Media library coming in Slice 3",
    }


@router.post("/upload")
async def upload_media(
    file: UploadFile = File(...),
    folder: str | None = Query(None, description="products, general, etc."),
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Upload media file.

    TODO: Implement in Slice 3
    - Accept file upload
    - Validate file type and size
    - Store file (local or cloud storage)
    - Generate thumbnails for images
    - Save metadata to database
    - Return file URL
    """
    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
    return {
        "file_url": None,
        "thumbnail_url": None,
        "message": "Media upload coming in Slice 3",
    }


@router.post("/upload/multiple")
async def upload_multiple_media(
    files: list[UploadFile] = File(...),
    folder: str | None = Query(None),
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Upload multiple media files at once.

    TODO: Implement in Slice 3
    - Accept multiple files
    - Process each file
    - Return list of uploaded file URLs
    - Handle errors gracefully
    """
    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
    return {
        "uploaded_files": [],
        "failed_files": [],
        "message": "Multiple upload coming in Slice 3",
    }


@router.get("/{media_id}")
def get_media_details(
    media_id: int,
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Get media file details.

    TODO: Implement in Slice 3
    - Get file metadata
    - Return file URL
    - Return usage information (which products use this file)
    """
    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
    return {"message": "Media details coming in Slice 3"}


@router.put("/{media_id}")
def update_media_metadata(
    media_id: int,
    metadata: dict,
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Update media file metadata.

    TODO: Implement in Slice 3
    - Update filename
    - Update alt text
    - Update tags/categories
    - Update description
    """
    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
    return {"message": "Media update coming in Slice 3"}


@router.delete("/{media_id}")
def delete_media(
    media_id: int,
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Delete media file.

    TODO: Implement in Slice 3
    - Verify file belongs to vendor
    - Check if file is in use by products
    - Delete file from storage
    - Delete database record
    - Return success/error
    """
    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
    return {"message": "Media deletion coming in Slice 3"}


@router.get("/{media_id}/usage")
def get_media_usage(
    media_id: int,
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Get where this media file is being used.

    TODO: Implement in Slice 3
    - Check products using this media
    - Check other entities using this media
    - Return list of usage
    """
    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
    return {
        "products": [],
        "other_usage": [],
        "message": "Media usage tracking coming in Slice 3",
    }


@router.post("/optimize/{media_id}")
def optimize_media(
    media_id: int,
    current_user: User = Depends(get_current_vendor_api),
    db: Session = Depends(get_db),
):
    """
    Optimize media file (compress, resize, etc.).

    TODO: Implement in Slice 3
    - Optimize image (compress, resize)
    - Generate multiple sizes
    - Keep original
    - Update database with new versions
    """
    vendor = _get_vendor_from_token(current_user, db)  # noqa: F841 - vendor will be used when implemented
    return {"message": "Media optimization coming in Slice 3"}