"""Job-related domain models — used by services, storage, and API."""

from __future__ import annotations

import enum
import uuid
from datetime import datetime, timezone
from typing import Any, List, Optional

from pydantic import BaseModel, Field


class JobKind(str, enum.Enum):
    DETECTION = "detection"
    RECOGNITION = "recognition"
    SEARCH = "search"               # scrape + reverse image search
    IMAGE_ANALYSIS = "image_analysis"
    METADATA = "metadata"
    FORENSICS = "forensics"
    OCR = "ocr"
    OBJECT_DETECTION = "object_detection"
    SCENE_RECOGNITION = "scene_recognition"
    NSFW_DETECTION = "nsfw_detection"
    AI_IMAGE_DETECTION = "ai_image_detection"
    EMBEDDING = "embedding"
    FULL_PIPELINE = "full_pipeline"  # all capabilities


class JobStatus(str, enum.Enum):
    PENDING = "pending"
    QUEUED = "queued"
    RUNNING = "running"
    COMPLETED = "completed"
    FAILED = "failed"
    CANCELLED = "cancelled"
    TIMEOUT = "timeout"


class JobRequest(BaseModel):
    """Inbound request to create a job."""
    kind: Optional[JobKind] = None
    image_url: Optional[str] = None
    image_base64: Optional[str] = None
    providers: List[str] = Field(
        default_factory=list,
        description="Optional whitelist of provider names. Empty = use all enabled.",
    )
    options: dict = Field(default_factory=dict)

    def has_image_input(self) -> bool:
        return bool(self.image_url or self.image_base64)


class Job(BaseModel):
    """Persisted job record."""
    id: str = Field(default_factory=lambda: str(uuid.uuid4()))
    kind: JobKind
    status: JobStatus = JobStatus.PENDING
    created_at: datetime = Field(default_factory=lambda: datetime.now(timezone.utc))
    started_at: Optional[datetime] = None
    completed_at: Optional[datetime] = None
    request: JobRequest
    image_hash: Optional[str] = None
    error: Optional[str] = None

    def mark_running(self) -> None:
        self.status = JobStatus.RUNNING
        self.started_at = datetime.now(timezone.utc)

    def mark_completed(self) -> None:
        self.status = JobStatus.COMPLETED
        self.completed_at = datetime.now(timezone.utc)

    def mark_failed(self, error: str) -> None:
        self.status = JobStatus.FAILED
        self.completed_at = datetime.now(timezone.utc)
        self.error = error

    def mark_timeout(self) -> None:
        self.status = JobStatus.TIMEOUT
        self.completed_at = datetime.now(timezone.utc)
        self.error = "Job exceeded timeout"


class JobResult(BaseModel):
    """The output of a completed job — wraps a UnifiedFaceReport."""
    job_id: str
    status: JobStatus
    report: Optional[Any] = None  # UnifiedFaceReport (avoid circular import)
    error: Optional[str] = None
    elapsed_ms: float = 0.0