"""Evidence API — AP0.9b."""

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 evidence as evidence_service
from tenant_context import TenantContext

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


class EvidenceUpdateRequest(BaseModel):
    title: Optional[str] = Field(default=None, min_length=1, max_length=255)
    description: Optional[str] = None
    status: Optional[Literal["submitted", "accepted", "rejected"]] = None
    action_id: Optional[str] = None
    milestone_id: Optional[str] = None
    clear_action_id: bool = False
    clear_milestone_id: bool = False


@router.get("/{evidence_id}")
def get_evidence(
    evidence_id: str,
    ctx: TenantContext = Depends(require_capability("kairo.evidence.read")),
):
    item = evidence_service.get_evidence(tenant_id=ctx.tenant_id, evidence_id=evidence_id)
    if not item:
        raise HTTPException(status_code=404, detail="Evidence nicht gefunden")
    return item


@router.patch("/{evidence_id}")
def update_evidence(
    evidence_id: str,
    body: EvidenceUpdateRequest,
    ctx: TenantContext = Depends(require_capability("kairo.evidence.manage")),
):
    try:
        item = evidence_service.update_evidence(
            tenant_id=ctx.tenant_id,
            evidence_id=evidence_id,
            user_id=ctx.user_id,
            title=body.title,
            description=body.description,
            status=body.status,
            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="Evidence nicht gefunden")
    return item


@router.delete("/{evidence_id}", status_code=204)
def delete_evidence(
    evidence_id: str,
    ctx: TenantContext = Depends(require_capability("kairo.evidence.manage")),
):
    if not evidence_service.delete_evidence(
        tenant_id=ctx.tenant_id, evidence_id=evidence_id, user_id=ctx.user_id
    ):
        raise HTTPException(status_code=404, detail="Evidence nicht gefunden")