from __future__ import annotations

from fastapi import APIRouter, Depends
from sqlalchemy import select
from sqlalchemy.orm import Session

from iti.auth import require_permission
from iti.db import get_db
from iti.responses import ok, page

from iti_system.models import SysConfig
from iti_system.schemas import ConfigCreate, ConfigQuery, ConfigUpdate
from iti_system.services import apply_keyword, dump_config, get_or_404, paginate_query


router = APIRouter(prefix="/sys/config", tags=["system.config"])


@router.get("/list", dependencies=[Depends(require_permission("system:config:list"))])
def list_config(query: ConfigQuery = Depends(), db: Session = Depends(get_db)):
    return ok([dump_config(item) for item in db.scalars(_query_configs(query)).all()])


@router.get("/page", dependencies=[Depends(require_permission("system:config:list"))])
def page_config(query: ConfigQuery = Depends(), db: Session = Depends(get_db)):
    result = paginate_query(db, _query_configs(query), page=query.page, size=query.size)
    return page([dump_config(item) for item in result["items"]], result["page"])


@router.post("", dependencies=[Depends(require_permission("system:config:create"))])
def create_config(payload: ConfigCreate, db: Session = Depends(get_db)):
    item = SysConfig(**payload.model_dump())
    db.add(item)
    db.commit()
    db.refresh(item)
    return ok(dump_config(item))


@router.put("/{id}", dependencies=[Depends(require_permission("system:config:edit"))])
def update_config(id: str, payload: ConfigUpdate, db: Session = Depends(get_db)):
    item = get_or_404(db, SysConfig, id, "配置不存在")
    for key, value in payload.model_dump(exclude_unset=True).items():
        setattr(item, key, value)
    db.commit()
    db.refresh(item)
    return ok(dump_config(item))


@router.delete("/{id}", dependencies=[Depends(require_permission("system:config:delete"))])
def delete_config(id: str, db: Session = Depends(get_db)):
    item = get_or_404(db, SysConfig, id, "配置不存在")
    db.delete(item)
    db.commit()
    return ok()


def _query_configs(query: ConfigQuery):
    stmt = select(SysConfig).order_by(SysConfig.sort, SysConfig.created_at.desc())
    stmt = apply_keyword(stmt, query.keyword, SysConfig.name, SysConfig.code, SysConfig.value)
    if query.type:
        stmt = stmt.where(SysConfig.type == query.type)
    if query.code:
        stmt = stmt.where(SysConfig.code.like(f"%{query.code}%"))
    if query.status:
        stmt = stmt.where(SysConfig.status == query.status)
    return stmt