from typing import List, Optional, Dict, Any, ClassVar
from datetime import datetime
from pydantic import BaseModel, Field, HttpUrl

class ImageBase(BaseModel):
    """Base schema for image data"""
    description: Optional[str] = Field(None, description="Image description", max_length=500)
    tags: List[str] = Field(default=[], description="Image tags")

class ImageUpload(ImageBase):
    """Schema for uploading an image"""
    # Note: The file itself is handled by FastAPI's UploadFile
    pass

class ImageUpdate(BaseModel):
    """Schema for updating an image"""
    description: Optional[str] = Field(None, description="Image description", max_length=500)
    tags: Optional[List[str]] = Field(None, description="Image tags")
    metadata: Optional[Dict[str, Any]] = Field(None, description="Image metadata")

class ImageResponse(ImageBase):
    """Schema for image response"""
    id: str
    filename: str
    original_filename: str
    file_size: int
    content_type: str
    public_url: Optional[HttpUrl] = None
    team_id: str
    uploader_id: str
    upload_date: datetime
    last_accessed: Optional[datetime] = None
    metadata: Dict[str, Any] = Field(default={})
    has_embedding: bool = False
    
    model_config: ClassVar[dict] = {
        "from_attributes": True,
        "json_schema_extra": {
            "example": {
                "id": "507f1f77bcf86cd799439011",
                "filename": "1234567890abcdef.jpg",
                "original_filename": "sunset.jpg",
                "file_size": 1024000,
                "content_type": "image/jpeg",
                "public_url": "https://storage.googleapis.com/bucket/1234567890abcdef.jpg",
                "team_id": "507f1f77bcf86cd799439022",
                "uploader_id": "507f1f77bcf86cd799439033",
                "upload_date": "2023-10-20T10:00:00",
                "last_accessed": "2023-10-21T10:00:00",
                "description": "Beautiful sunset over the mountains",
                "tags": ["sunset", "mountains", "nature"],
                "metadata": {
                    "width": 1920,
                    "height": 1080,
                    "location": "Rocky Mountains"
                },
                "has_embedding": True
            }
        }
    }

class ImageListResponse(BaseModel):
    """Schema for image list response"""
    images: List[ImageResponse]
    total: int
    page: int
    page_size: int
    total_pages: int
    
    model_config: ClassVar[dict] = {
        "json_schema_extra": {
            "example": {
                "images": [
                    {
                        "id": "507f1f77bcf86cd799439011",
                        "filename": "1234567890abcdef.jpg",
                        "original_filename": "sunset.jpg",
                        "file_size": 1024000,
                        "content_type": "image/jpeg",
                        "public_url": "https://storage.googleapis.com/bucket/1234567890abcdef.jpg",
                        "team_id": "507f1f77bcf86cd799439022",
                        "uploader_id": "507f1f77bcf86cd799439033",
                        "upload_date": "2023-10-20T10:00:00",
                        "last_accessed": "2023-10-21T10:00:00",
                        "description": "Beautiful sunset over the mountains",
                        "tags": ["sunset", "mountains", "nature"],
                        "metadata": {
                            "width": 1920,
                            "height": 1080,
                            "location": "Rocky Mountains"
                        },
                        "has_embedding": True
                    }
                ],
                "total": 1,
                "page": 1,
                "page_size": 10,
                "total_pages": 1
            }
        }
    }

class ImageSearchQuery(BaseModel):
    """Schema for image search query"""
    query: str = Field(..., description="Search query", min_length=1)
    limit: int = Field(10, description="Maximum number of results", ge=1, le=100)
    
    model_config: ClassVar[dict] = {
        "json_schema_extra": {
            "example": {
                "query": "mountain sunset",
                "limit": 10
            }
        }
    }

class ImageSearchResult(BaseModel):
    """Schema for image search result"""
    image: ImageResponse
    score: float
    
    model_config: ClassVar[dict] = {
        "json_schema_extra": {
            "example": {
                "image": {
                    "id": "507f1f77bcf86cd799439011",
                    "filename": "1234567890abcdef.jpg",
                    "original_filename": "sunset.jpg",
                    "file_size": 1024000,
                    "content_type": "image/jpeg",
                    "public_url": "https://storage.googleapis.com/bucket/1234567890abcdef.jpg",
                    "team_id": "507f1f77bcf86cd799439022",
                    "uploader_id": "507f1f77bcf86cd799439033",
                    "upload_date": "2023-10-20T10:00:00",
                    "last_accessed": "2023-10-21T10:00:00",
                    "description": "Beautiful sunset over the mountains",
                    "tags": ["sunset", "mountains", "nature"],
                    "metadata": {
                        "width": 1920,
                        "height": 1080,
                        "location": "Rocky Mountains"
                    },
                    "has_embedding": True
                },
                "score": 0.95
            }
        }
    }

class ImageSearchResponse(BaseModel):
    """Schema for image search response"""
    results: List[ImageSearchResult]
    total: int
    query: str
    
    model_config: ClassVar[dict] = {
        "json_schema_extra": {
            "example": {
                "results": [
                    {
                        "image": {
                            "id": "507f1f77bcf86cd799439011",
                            "filename": "1234567890abcdef.jpg",
                            "original_filename": "sunset.jpg",
                            "file_size": 1024000,
                            "content_type": "image/jpeg",
                            "public_url": "https://storage.googleapis.com/bucket/1234567890abcdef.jpg",
                            "team_id": "507f1f77bcf86cd799439022",
                            "uploader_id": "507f1f77bcf86cd799439033",
                            "upload_date": "2023-10-20T10:00:00",
                            "last_accessed": "2023-10-21T10:00:00",
                            "description": "Beautiful sunset over the mountains",
                            "tags": ["sunset", "mountains", "nature"],
                            "metadata": {
                                "width": 1920,
                                "height": 1080,
                                "location": "Rocky Mountains"
                            },
                            "has_embedding": True
                        },
                        "score": 0.95
                    }
                ],
                "total": 1,
                "query": "mountain sunset"
            }
        }
    }