# models/schema/media.py
"""
Media/file management Pydantic schemas for API validation and responses.

This module provides schemas for:
- Media library listing
- File upload responses
- Media metadata operations
- Media usage tracking
"""

from datetime import datetime
from typing import Any

from pydantic import BaseModel, Field

# ============================================================================
# SHARED RESPONSE SCHEMAS
# ============================================================================


class MessageResponse(BaseModel):
    """Generic message response for simple operations."""

    message: str


# ============================================================================
# MEDIA ITEM SCHEMAS
# ============================================================================


class MediaItemResponse(BaseModel):
    """Single media item response."""

    id: int
    filename: str
    original_filename: str | None = None
    file_url: str
    thumbnail_url: str | None = None
    media_type: str  # image, video, document
    mime_type: str | None = None
    file_size: int | None = None  # bytes
    width: int | None = None  # for images/videos
    height: int | None = None  # for images/videos
    alt_text: str | None = None
    description: str | None = None
    folder: str | None = None
    metadata: dict[str, Any] | None = None
    created_at: datetime
    updated_at: datetime | None = None

    model_config = {"from_attributes": True}


class MediaListResponse(BaseModel):
    """Paginated list of media items."""

    media: list[MediaItemResponse] = []
    total: int = 0
    skip: int = 0
    limit: int = 100
    message: str | None = None


# ============================================================================
# UPLOAD RESPONSE SCHEMAS
# ============================================================================


class MediaUploadResponse(BaseModel):
    """Response for single file upload."""

    id: int | None = None
    file_url: str | None = None
    thumbnail_url: str | None = None
    filename: str | None = None
    file_size: int | None = None
    media_type: str | None = None
    message: str | None = None


class UploadedFileInfo(BaseModel):
    """Information about a successfully uploaded file."""

    id: int
    filename: str
    file_url: str
    thumbnail_url: str | None = None


class FailedFileInfo(BaseModel):
    """Information about a failed file upload."""

    filename: str
    error: str


class MultipleUploadResponse(BaseModel):
    """Response for multiple file upload."""

    uploaded_files: list[UploadedFileInfo] = []
    failed_files: list[FailedFileInfo] = []
    total_uploaded: int = 0
    total_failed: int = 0
    message: str | None = None


# ============================================================================
# MEDIA DETAIL SCHEMAS
# ============================================================================


class MediaDetailResponse(BaseModel):
    """Detailed media item response with usage info."""

    id: int | None = None
    filename: str | None = None
    original_filename: str | None = None
    file_url: str | None = None
    thumbnail_url: str | None = None
    media_type: str | None = None
    mime_type: str | None = None
    file_size: int | None = None
    width: int | None = None
    height: int | None = None
    alt_text: str | None = None
    description: str | None = None
    folder: str | None = None
    metadata: dict[str, Any] | None = None
    created_at: datetime | None = None
    updated_at: datetime | None = None
    message: str | None = None

    model_config = {"from_attributes": True}


# ============================================================================
# MEDIA UPDATE SCHEMAS
# ============================================================================


class MediaMetadataUpdate(BaseModel):
    """Request model for updating media metadata."""

    filename: str | None = Field(None, max_length=255)
    alt_text: str | None = Field(None, max_length=500)
    description: str | None = None
    folder: str | None = Field(None, max_length=100)
    metadata: dict[str, Any] | None = None


# ============================================================================
# MEDIA USAGE SCHEMAS
# ============================================================================


class ProductUsageInfo(BaseModel):
    """Information about product using this media."""

    product_id: int
    product_name: str
    usage_type: str  # main_image, gallery, variant, etc.


class MediaUsageResponse(BaseModel):
    """Response showing where media is being used."""

    media_id: int | None = None
    products: list[ProductUsageInfo] = []
    other_usage: list[dict[str, Any]] = []
    total_usage_count: int = 0
    message: str | None = None


# ============================================================================
# MEDIA OPTIMIZATION SCHEMAS
# ============================================================================


class OptimizationResultResponse(BaseModel):
    """Response for media optimization operation."""

    media_id: int | None = None
    original_size: int | None = None
    optimized_size: int | None = None
    savings_percent: float | None = None
    optimized_url: str | None = None
    message: str | None = None