"""Blocker API — AP0.8b."""

from __future__ import annotations

from typing import Literal, Optional

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

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


class BlockerCreateRequest(BaseModel):
    title: str = Field(min_length=1, max_length=255)
    description: str = ""
    status: Literal["open", "in_progress", "resolved", "accepted_risk", "dismissed"] = "open"
    action_id: Optional[str] = None
    set_action_blocked: bool = False


class BlockerUpdateRequest(BaseModel):
    title: Optional[str] = Field(default=None, min_length=1, max_length=255)
    description: Optional[str] = None
    status: Optional[
        Literal["open", "in_progress", "resolved", "accepted_risk", "dismissed"]
    ] = None
    action_id: Optional[str] = None
    clear_action_id: bool = False


@router.get("/{blocker_id}")
def get_blocker(
    blocker_id: str,
    ctx: TenantContext = Depends(require_capability("kairo.blocker.read")),
):
    item = blocker_service.get_blocker(tenant_id=ctx.tenant_id, blocker_id=blocker_id)
    if not item:
        raise HTTPException(status_code=404, detail="Blocker nicht gefunden")
    return item


@router.patch("/{blocker_id}")
def update_blocker(
    blocker_id: str,
    body: BlockerUpdateRequest,
    ctx: TenantContext = Depends(require_capability("kairo.blocker.manage")),
):
    try:
        item = blocker_service.update_blocker(
            tenant_id=ctx.tenant_id,
            blocker_id=blocker_id,
            user_id=ctx.user_id,
            title=body.title,
            description=body.description,
            status=body.status,
            action_id=body.action_id,
            clear_action_id=body.clear_action_id,
        )
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc)) from exc
    if not item:
        raise HTTPException(status_code=404, detail="Blocker nicht gefunden")
    return item


@router.delete("/{blocker_id}", status_code=204)
def delete_blocker(
    blocker_id: str,
    ctx: TenantContext = Depends(require_capability("kairo.blocker.manage")),
):
    if not blocker_service.delete_blocker(
        tenant_id=ctx.tenant_id, blocker_id=blocker_id, user_id=ctx.user_id
    ):
        raise HTTPException(status_code=404, detail="Blocker nicht gefunden")