from flask import Blueprint, render_template, request, url_for, flash, redirect, session
import os
import sqlite3
import psycopg2, json, hashlib

study_bp = Blueprint('study', __name__)

# pgdb_conn
# 读取json文件
with open('/var/open-ww3-project-ww3-tw/config/study/db_config.json', 'r') as file:
    data = json.load(file)
    print(data)
    # 设定数据库连接配置
    conn_params = {
    "dbname" : data['dbname'],
    "user" : data['user'],
    "password": data['password'],
    "host": data['host'],
    "port": data['port']
    }

def get_db_conn():
    conn = sqlite3.connect('/var/open-ww3-project-ww3-tw/databases/database.db')
    conn.row_factory = sqlite3.Row
    return conn

def get_posts(posts_id):
    conn = get_db_conn()
    posts = conn.execute("SELECT *, datetime(created, '+8 hours') AS created_8 FROM posts WHERE id = ?", (posts_id,)).fetchone()
    conn.close()
    return posts

@study_bp.route('/')
def home():
    conn = get_db_conn()
    sql = "SELECT *, datetime(created, '+8 hours') AS created_8 FROM posts;"
    posts = conn.execute(sql).fetchall()
    conn.close()
    return render_template('study/home.html', posts=posts[::-1])

@study_bp.route('/about/')
def about():
    return render_template('study/about.html')

@study_bp.route('/posts/<int:posts_id>')
def show_posts_id(posts_id):
    conn = get_db_conn()
    posts = get_posts(posts_id)
    if posts is None:
        return '抱歉，未查到该文章'

    return render_template('study/posts.html', posts=posts)

@study_bp.route('/posts/new/', methods=('GET', 'POST'))
def new():
    if request.method == "POST":
        title = request.form['title']
        content = request.form['content']

        if not title:
            flash('标题不能为空')
        elif not content:
            flash('内容不能为空')
        else:
            conn = get_db_conn()
            conn.execute('insert into posts (title, content) values (?, ?)', (title, content))
            conn.commit()
            conn.close()
            flash('文章发布成功')
            return redirect(url_for('study.home'))
            
    return render_template('study/new.html')

@study_bp.route('/posts/<int:posts_id>/edit', methods=('GET', 'POST'))
def edit_posts_id(posts_id):
    posts = get_posts(posts_id)
    if request.method == "POST":
        title = request.form['title']
        content = request.form['content']

        if not title:
            flash('标题不能为空')
        elif not content:
            flash('内容不能为空')
        else:
            conn = get_db_conn()
            conn.execute('update posts set title= ?, content = ? where id = ?', (title, content, posts_id))
            conn.commit()
            conn.close()
            return redirect(url_for('study.home'))
    
    return render_template('study/edit.html', posts=posts)

@study_bp.route('/posts/<int:posts_id>/delete/', methods=['POST' , 'GET'])
def delete_posts_id(posts_id):
    if request.method == "POST":
        posts = get_posts(posts_id)
        conn = get_db_conn()
        conn.execute('DELETE FROM posts WHERE id = ?', (posts_id,))
        conn.commit()
        conn.close()
        flash('删除成功')
        return redirect(url_for('study.home'))
    
    elif request.method == "GET":
        posts = get_posts(posts_id)
        conn = get_db_conn()
        conn.execute('DELETE FROM posts WHERE id = ?', (posts_id,))
        conn.commit()
        conn.close()
        return render_template('study/delete.html', posts=posts)

@study_bp.route('/bbs/', methods=['POST' , 'GET'])
def pgdb():
    # 连接数据库
    try:
        conn = psycopg2.connect(**conn_params)
        print("连接没问题！！！")
        cur = conn.cursor()
        # cur.execute("select * from study_pg;")
        # db_cur = cur.fetchone()
        cur.close()
        conn.close()
        # return  f"连接没问题！！！<br>数据库内容: {db_cur}"
        return render_template("study/bbs.html")
        # , db_cur = db_cur)
    except Exception as e:
        print(f"出现了一点状况: {e}")
        cur = conn.cursor()
        cur.close()
        conn.close()
        return  f"出现了一点状况: {e}"

@study_bp.route('/bbs/register/', methods=['POST' , 'GET'])
def pgdb_register():
    if request.method == "GET":
        return  render_template('study/register.html')
    
    if request.method == "POST":
        username = request.form.get('username')
        passwd = request.form.get('passwd')
        age = request.form.get('age')
        hash_obj = hashlib.sha256()
        hash_obj.update(passwd.encode())
        passwd_hash = hash_obj.hexdigest()
        nbsp = "&nbsp;" *4
        
        # 数据库操作
        conn = psycopg2.connect(**conn_params)
        cur = conn.cursor()
        sql_check = f"select username from user_temp where username = '{username}';"  
        cur.execute(sql_check)
        sql_name = cur.fetchone()
        # cur.close()
        # conn.close()
        if sql_name == None:
            sql_insert = f"insert into user_temp (username, passwd, age) values ('{username}', '{passwd_hash}', '{age}');"
            cur.execute(sql_insert)
            conn.commit()
            conn.close()
            return "名字没问题允许注册" \
            "用户名: " f"{nbsp}" f"{username}" "<br>" \
            "密码: " f"{nbsp}" f"{passwd}" "<br>" \
            "年龄: " f"{nbsp}" "**" "<br>" "<br>" \
            "<b>密码为哈希存储，只会展示一次<br>" \
            "如果忘记密码了，建议重新注册</b>" \
            # "<br>" "<br>" f"{sql_name}"
        else:
            conn.close()
            return "名字大错特错！！！不允许注册<br><a href='./'>返回注册页面</a>"
        # sql_insert = f"insert into user_temp (username, passwd, age) values ('{username}', '{passwd_hash}', '{age}');"
        # cur.execute(sql_insert)
        # conn.commit()
        # cur.close()
        # conn.close()
        

@study_bp.route('/bbs/login/', methods=['POST', 'GET'])
def pgdb_login():
    if request.method == "GET":
        return render_template('study/login.html')

    if request.method == "POST":
        username = request.form.get('username', '')
        passwd = request.form.get('passwd', '')

        if not username or not passwd:
            return "用户名或密码不能空<br><a href='./'>返回重登</a>"

        hash_passwd = hashlib.sha256(passwd.encode()).hexdigest()

        conn = psycopg2.connect(**conn_params)
        cur = conn.cursor()
        cur.execute(
            "SELECT id, passwd FROM user_temp WHERE username = %s",
            (username,)
        )
        row = cur.fetchone()
        cur.close()
        conn.close()

        if row and row[1] == hash_passwd:
            session['user_id'] = row[0]
            return "登录成功<br>"
        else:
            return "登录失败了.....<br><a href='./'>点击重新登录</a>"