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

from app.core.database import get_db
from app.crud import audit as audit_crud
from app.crud import part_colour as part_colour_crud
from app.deps import require_permission
from app.models.user import User
from app.schemas.part_colour import PartColourCreate, PartColourRead, PartColourUpdate

router = APIRouter()


@router.get("", response_model=list[PartColourRead])
async def list_part_colours(
    skip: int = 0,
    limit: int = 100,
    db: AsyncSession = Depends(get_db),
    _: User = Depends(require_permission("part_colours:read")),
):
    return await part_colour_crud.list_all(db, skip=skip, limit=limit)


@router.post("", response_model=PartColourRead, status_code=status.HTTP_201_CREATED)
async def create_part_colour(
    payload: PartColourCreate,
    db: AsyncSession = Depends(get_db),
    actor: User = Depends(require_permission("part_colours:write")),
):
    pc = await part_colour_crud.create(db, name=payload.name)
    await audit_crud.log(
        db,
        actor=actor,
        action="create",
        resource_type="PartColour",
        resource_id=pc.id,
        description=audit_crud.describe_create("PartColour", pc.id, pc.name),
    )
    return pc


@router.get("/{part_colour_id}", response_model=PartColourRead)
async def get_part_colour(
    part_colour_id: int,
    db: AsyncSession = Depends(get_db),
    _: User = Depends(require_permission("part_colours:read")),
):
    pc = await part_colour_crud.get(db, part_colour_id)
    if pc is None:
        raise HTTPException(status_code=404, detail="Part colour not found")
    return pc


@router.patch("/{part_colour_id}", response_model=PartColourRead)
async def update_part_colour(
    part_colour_id: int,
    payload: PartColourUpdate,
    db: AsyncSession = Depends(get_db),
    actor: User = Depends(require_permission("part_colours:write")),
):
    pc = await part_colour_crud.get(db, part_colour_id)
    if pc is None:
        raise HTTPException(status_code=404, detail="Part colour not found")
    changes = payload.model_dump(exclude_unset=True)
    pc = await part_colour_crud.update(db, pc, changes)
    await audit_crud.log(
        db,
        actor=actor,
        action="update",
        resource_type="PartColour",
        resource_id=pc.id,
        description=audit_crud.describe_update("PartColour", pc.id, changes),
    )
    return pc


@router.delete("/{part_colour_id}", status_code=status.HTTP_204_NO_CONTENT)
async def delete_part_colour(
    part_colour_id: int,
    db: AsyncSession = Depends(get_db),
    actor: User = Depends(require_permission("part_colours:delete")),
):
    pc = await part_colour_crud.get(db, part_colour_id)
    if pc is None:
        raise HTTPException(status_code=404, detail="Part colour not found")
    name = pc.name
    await part_colour_crud.delete(db, pc)
    await audit_crud.log(
        db,
        actor=actor,
        action="delete",
        resource_type="PartColour",
        resource_id=part_colour_id,
        description=audit_crud.describe_delete("PartColour", part_colour_id, name),
    )