"""ABAC policy routes — attribute-based access control management."""

from __future__ import annotations

import uuid

from fastapi import APIRouter, Depends, HTTPException, status
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.db import get_db
from app.deps import require_permission
from app.schemas.policy import PolicyCreate, PolicyUpdate
from app.services import policy_service

router = APIRouter(prefix="/api/v1/policies", tags=["policies"])


@router.get("/{entity_type}")
async def list_policies(
    entity_type: str,
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(require_permission("policies:read")),
):
    """List all ABAC policies for a given entity type."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
    try:
        items = await policy_service.list_policies(db, tenant_id, entity_type)
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e)) from e
    return {"items": items, "total": len(items)}


@router.post("", status_code=status.HTTP_201_CREATED)
async def create_policy(
    body: PolicyCreate,
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(require_permission("policies:write")),
):
    """Create a new ABAC policy."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
    try:
        return await policy_service.create_policy(
            db,
            tenant_id,
            name=body.name,
            entity_type=body.entity_type,
            principal_type=body.principal_type,
            principal_id=body.principal_id,
            effect=body.effect,
            conditions=body.conditions,
            priority=body.priority,
        )
    except ValueError as e:
        raise HTTPException(status_code=400, detail=str(e)) from e


@router.put("/{policy_id}")
async def update_policy(
    policy_id: str,
    body: PolicyUpdate,
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(require_permission("policies:write")),
):
    """Update an existing ABAC policy."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
    try:
        return await policy_service.update_policy(
            db,
            tenant_id,
            policy_id,
            name=body.name,
            entity_type=body.entity_type,
            principal_type=body.principal_type,
            principal_id=body.principal_id,
            effect=body.effect,
            conditions=body.conditions,
            priority=body.priority,
            enabled=body.enabled,
        )
    except ValueError as e:
        raise HTTPException(status_code=404, detail=str(e)) from e


@router.delete("/{policy_id}", status_code=status.HTTP_204_NO_CONTENT)
async def delete_policy(
    policy_id: str,
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(require_permission("policies:write")),
):
    """Delete an ABAC policy."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
    try:
        await policy_service.delete_policy(db, tenant_id, policy_id)
    except ValueError as e:
        raise HTTPException(status_code=404, detail=str(e)) from e