import os
import sys
import click
import config


from flask import Flask, render_template, request, redirect, url_for, flash,session,g
from flask_migrate import Migrate
from exts import db, mail
from blueprints.user import bp as user_bp
from blueprints.Display import bp as display_bp
from blueprints.emojis import bp as emojis_bp
from blueprints.admin import bp as admin_bp
from models import UserModel





app = Flask(__name__)
# 绑定配置文件
app.config.from_object(config)
# 传入实例
db.init_app(app)
mail.init_app(app)
# 注册蓝图
app.register_blueprint(user_bp)
app.register_blueprint(display_bp)
app.register_blueprint(emojis_bp)
app.register_blueprint(admin_bp)

@app.context_processor
def my_context_processor():
    return {"user": g.user}



Migrate(app, db)


# ORM模型映射成表的三步：
# 1.flask db init  这步只需要在项目刚开始时执行一次
# 2.flask db migrate  这步是识别ORM模型的改变，生成迁移脚本
# 3.flask db updata 运行迁移脚本，同步到数据库中

# 此种方式来映射无法时刻跟随表的改变
# with app.app_context():#请求上下文
#     db.create_all()

# before_request/ before_first_request/ after_request
# hook
@app.before_request
def my_before_request():
    user_id = session.get("user_id")
    if user_id:
        user = UserModel.query.get(user_id)
        setattr(g, "user", user)
    else:
        setattr(g, "user", None)








if __name__ == '__main__':
    app.run()