"""Currency routes — list, create, update, delete."""

from __future__ import annotations

import uuid

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

from app.core.auth import check_permission
from app.core.db import get_db
from app.deps import get_current_user
from app.schemas.currency import CurrencyCreate, CurrencyUpdate
from app.services import currency_service

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


@router.get("")
async def list_currencies(
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(get_current_user),
):
    """List all currencies for the current tenant."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
    return await currency_service.list_currencies(db, tenant_id)


@router.post("", status_code=status.HTTP_201_CREATED)
async def create_currency(
    body: CurrencyCreate,
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(get_current_user),
):
    """Create a currency. Requires admin permission."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
    user_id = uuid.UUID(current_user["user_id"])
    role = current_user.get("role", "viewer")

    if not check_permission(role, "settings", "create"):
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail={"detail": "Insufficient permissions", "code": "forbidden"},
        )

    data = body.model_dump()
    return await currency_service.create_currency(db, tenant_id, user_id, data)


@router.patch("/{currency_id}")
async def update_currency(
    currency_id: str,
    body: CurrencyUpdate,
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(get_current_user),
):
    """Update a currency. Requires admin permission."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
    user_id = uuid.UUID(current_user["user_id"])
    role = current_user.get("role", "viewer")

    if not check_permission(role, "settings", "update"):
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail={"detail": "Insufficient permissions", "code": "forbidden"},
        )

    try:
        cid = uuid.UUID(currency_id)
    except ValueError:
        raise HTTPException(400, detail={"detail": "Invalid currency_id", "code": "invalid_id"}) from None

    data = body.model_dump(exclude_unset=True)
    result = await currency_service.update_currency(db, tenant_id, user_id, cid, data)
    if result is None:
        raise HTTPException(404, detail={"detail": "Currency not found", "code": "not_found"})
    return result


@router.delete("/{currency_id}", status_code=status.HTTP_204_NO_CONTENT)
async def delete_currency(
    currency_id: str,
    db: AsyncSession = Depends(get_db),
    current_user: dict = Depends(get_current_user),
):
    """Delete a currency. Requires admin permission."""
    tenant_id = uuid.UUID(current_user["tenant_id"])
    user_id = uuid.UUID(current_user["user_id"])
    role = current_user.get("role", "viewer")

    if not check_permission(role, "settings", "delete"):
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail={"detail": "Insufficient permissions", "code": "forbidden"},
        )

    try:
        cid = uuid.UUID(currency_id)
    except ValueError:
        raise HTTPException(400, detail={"detail": "Invalid currency_id", "code": "invalid_id"}) from None

    deleted = await currency_service.delete_currency(db, tenant_id, user_id, cid)
    if not deleted:
        raise HTTPException(404, detail={"detail": "Currency not found", "code": "not_found"})