"""Review API — AP0.9d."""

from __future__ import annotations

from datetime import datetime
from typing import Literal, Optional

from capabilities import require_capability
from fastapi import APIRouter, Depends, HTTPException
from pydantic import BaseModel, Field
from services import reviews as review_service
from tenant_context import TenantContext

router = APIRouter(prefix="/api/reviews", tags=["reviews"])


class ReviewUpdateRequest(BaseModel):
    title: Optional[str] = Field(default=None, min_length=1, max_length=255)
    summary: Optional[str] = None
    status: Optional[Literal["planned", "completed", "skipped"]] = None
    due_at: Optional[str] = None
    clear_due_at: bool = False
    action_id: Optional[str] = None
    milestone_id: Optional[str] = None
    clear_action_id: bool = False
    clear_milestone_id: bool = False


def _parse_due_at(value: Optional[str]) -> Optional[datetime]:
    if value is None:
        return None
    try:
        return datetime.fromisoformat(value.replace("Z", "+00:00"))
    except ValueError as exc:
        raise HTTPException(status_code=400, detail="Ungültiges due_at") from exc


@router.get("/{review_id}")
def get_review(
    review_id: str,
    ctx: TenantContext = Depends(require_capability("kairo.review.read")),
):
    item = review_service.get_review(tenant_id=ctx.tenant_id, review_id=review_id)
    if not item:
        raise HTTPException(status_code=404, detail="Review nicht gefunden")
    return item


@router.patch("/{review_id}")
def update_review(
    review_id: str,
    body: ReviewUpdateRequest,
    ctx: TenantContext = Depends(require_capability("kairo.review.manage")),
):
    due_at = _parse_due_at(body.due_at) if body.due_at is not None else None
    try:
        item = review_service.update_review(
            tenant_id=ctx.tenant_id,
            review_id=review_id,
            user_id=ctx.user_id,
            title=body.title,
            summary=body.summary,
            status=body.status,
            due_at=due_at,
            clear_due_at=body.clear_due_at,
            action_id=body.action_id,
            milestone_id=body.milestone_id,
            clear_action_id=body.clear_action_id,
            clear_milestone_id=body.clear_milestone_id,
        )
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc)) from exc
    if not item:
        raise HTTPException(status_code=404, detail="Review nicht gefunden")
    return item


@router.delete("/{review_id}", status_code=204)
def delete_review(
    review_id: str,
    ctx: TenantContext = Depends(require_capability("kairo.review.manage")),
):
    if not review_service.delete_review(
        tenant_id=ctx.tenant_id, review_id=review_id, user_id=ctx.user_id
    ):
        raise HTTPException(status_code=404, detail="Review nicht gefunden")