"""
Schémas Pydantic — validation et sérialisation des réponses API
"""
from datetime import datetime
from typing import Any, List, Optional
from pydantic import BaseModel, ConfigDict
from app.models.image import ProcessingStatus


# ─────────────────────────────────────────────────────────────
# Sous-schémas imbriqués
# ─────────────────────────────────────────────────────────────

class ExifGPS(BaseModel):
    latitude: Optional[float] = None
    longitude: Optional[float] = None
    altitude: Optional[float] = None
    has_gps: bool = False


class ExifCamera(BaseModel):
    make: Optional[str] = None
    model: Optional[str] = None
    lens: Optional[str] = None
    iso: Optional[int] = None
    aperture: Optional[str] = None
    shutter_speed: Optional[str] = None
    focal_length: Optional[str] = None
    flash: Optional[bool] = None
    orientation: Optional[int] = None
    software: Optional[str] = None
    taken_at: Optional[datetime] = None


class ExifData(BaseModel):
    camera: ExifCamera
    gps: ExifGPS
    raw: Optional[dict[str, Any]] = None


class OcrData(BaseModel):
    text: Optional[str] = None
    language: Optional[str] = None
    confidence: Optional[float] = None
    has_text: bool = False


class AiData(BaseModel):
    model_config = ConfigDict(protected_namespaces=())
    description: Optional[str] = None
    tags: Optional[List[str]] = None
    confidence: Optional[float] = None
    model_used: Optional[str] = None
    processed_at: Optional[datetime] = None
    prompt_tokens: Optional[int] = None
    output_tokens: Optional[int] = None


class ProcessingInfo(BaseModel):
    status: ProcessingStatus
    error: Optional[str] = None
    started_at: Optional[datetime] = None
    done_at: Optional[datetime] = None


# ─────────────────────────────────────────────────────────────
# Réponses principales
# ─────────────────────────────────────────────────────────────

class ImageBase(BaseModel):
    model_config = ConfigDict(from_attributes=True)

    id: int
    uuid: str
    original_name: str
    mime_type: Optional[str] = None
    file_size: Optional[int] = None
    width: Optional[int] = None
    height: Optional[int] = None
    uploaded_at: Optional[datetime] = None
    processing_status: ProcessingStatus


class ImageSummary(ImageBase):
    """Version allégée pour les listes."""
    ai_tags: Optional[List[str]] = None
    ai_description: Optional[str] = None
    thumbnail_path: Optional[str] = None


class ImageDetail(ImageBase):
    """Version complète avec toutes les données collectées."""
    exif: ExifData
    ocr: OcrData
    ai: AiData
    processing: ProcessingInfo

    @classmethod
    def from_orm_full(cls, img) -> "ImageDetail":
        return cls(
            id=img.id,
            uuid=img.uuid,
            original_name=img.original_name,
            mime_type=img.mime_type,
            file_size=img.file_size,
            width=img.width,
            height=img.height,
            uploaded_at=img.uploaded_at,
            processing_status=img.processing_status,
            thumbnail_path=img.thumbnail_path,
            exif=ExifData(
                camera=ExifCamera(
                    make=img.exif_make,
                    model=img.exif_model,
                    lens=img.exif_lens,
                    iso=img.exif_iso,
                    aperture=img.exif_aperture,
                    shutter_speed=img.exif_shutter,
                    focal_length=img.exif_focal,
                    flash=img.exif_flash,
                    orientation=img.exif_orientation,
                    software=img.exif_software,
                    taken_at=img.exif_taken_at,
                ),
                gps=ExifGPS(
                    latitude=img.exif_gps_lat,
                    longitude=img.exif_gps_lon,
                    altitude=img.exif_altitude,
                    has_gps=img.has_gps,
                ),
                raw=img.exif_raw,
            ),
            ocr=OcrData(
                text=img.ocr_text,
                language=img.ocr_language,
                confidence=img.ocr_confidence,
                has_text=img.ocr_has_text or False,
            ),
            ai=AiData(
                description=img.ai_description,
                tags=img.ai_tags,
                confidence=img.ai_confidence,
                model_used=img.ai_model_used,
                processed_at=img.ai_processed_at,
                prompt_tokens=img.ai_prompt_tokens,
                output_tokens=img.ai_output_tokens,
            ),
            processing=ProcessingInfo(
                status=img.processing_status,
                error=img.processing_error,
                started_at=img.processing_started_at,
                done_at=img.processing_done_at,
            ),
        )


class UploadResponse(BaseModel):
    id: int
    uuid: str
    original_name: str
    status: ProcessingStatus
    message: str = "Image uploadée — traitement AI en cours"


class StatusResponse(BaseModel):
    id: int
    uuid: str
    status: ProcessingStatus
    error: Optional[str] = None
    started_at: Optional[datetime] = None
    done_at: Optional[datetime] = None


class PaginatedImages(BaseModel):
    total: int
    page: int
    page_size: int
    pages: int
    items: List[ImageSummary]
    # Quota tracking
    storage_used_mb: Optional[float] = None
    storage_quota_mb: Optional[int] = None
    quota_pct: Optional[float] = None


class DeleteResponse(BaseModel):
    deleted_id: int
    message: str = "Image supprimée avec succès"


class TagsResponse(BaseModel):
    tags: List[str]
    total: int


class ReprocessResponse(BaseModel):
    id: int
    message: str = "Traitement AI relancé"


# ─────────────────────────────────────────────────────────────
# AI — Endpoints externes (résumé URL, rédaction)
# ─────────────────────────────────────────────────────────────

class SummarizeRequest(BaseModel):
    url: str
    language: str = "français"


class SummarizeResponse(BaseModel):
    url: str
    title: Optional[str] = None
    summary: str
    tags: List[str]
    model: str


class DraftTaskRequest(BaseModel):
    description: str
    context: Optional[str] = None
    language: str = "français"


class DraftTaskResponse(BaseModel):
    title: str
    description: str
    steps: List[str]
    estimated_time: Optional[str] = None
    priority: Optional[str] = None