# -*- coding: utf-8 -*-
from __future__ import annotations

from typing import Any

from flask import Flask

from app.config import Config
from app.db import init_db, seed_if_empty
from app.routes import register_routes


def _fmt_price(value: Any, digits: int = 3) -> str:
    """价格展示：固定小数位，避免浮点尾巴。"""
    if value is None or value == "":
        return "—"
    try:
        return f"{float(value):.{int(digits)}f}"
    except (TypeError, ValueError):
        return str(value)


def _fmt_money(value: Any, digits: int = 2) -> str:
    if value is None or value == "":
        return "—"
    try:
        return f"{float(value):.{int(digits)}f}"
    except (TypeError, ValueError):
        return str(value)


def create_app() -> Flask:
    app = Flask(__name__, template_folder="templates", static_folder="static")
    app.config.from_object(Config)
    app.secret_key = Config.SECRET_KEY

    app.jinja_env.filters["fmt_price"] = _fmt_price
    app.jinja_env.filters["fmt_money"] = _fmt_money

    init_db()
    seed_if_empty()
    register_routes(app)
    return app