from flask import Flask, jsonify, request, render_template, redirect, url_for
# from flask_oauthlib.client import OAuth
from flask_login import LoginManager, UserMixin, login_user, login_required, logout_user, current_user
import secrets
from modules import storage
import os

def init_app():
    app = Flask(__name__, template_folder='../templates', static_folder='../static')
    app.config['SECRET_KEY'] = 'your-secret-key'
    login_manager = LoginManager(app)
    login_manager.login_view = 'login'

    # oauth = OAuth(app)
    # google = oauth.remote_app(
    #     'google',
    #     consumer_key='YOUR_GOOGLE_CLIENT_ID',
    #     consumer_secret='YOUR_GOOGLE_CLIENT_SECRET',
    #     request_token_params={
    #         'scope': 'email'
    #     },
    #     base_url='https://www.googleapis.com/oauth2/v1/',
    #     request_token_url=None,
    #     access_token_method='POST',
    #     access_token_url='https://accounts.google.com/o/oauth2/token',
    #     authorize_url='https://accounts.google.com/o/oauth2/auth',
    # )


    login_manager = LoginManager()
    login_manager.init_app(app)
    
    @app.route('/login/google/authorized')
    def authorized():
        # resp = google.authorized_response()
        # if resp is None or resp.get('access_token') is None:
        #     return 'Access denied: reason={} error={}'.format(
        #         request.args['error_reason'],
        #         request.args['error_description']
        #     )
        # session['google_token'] = (resp['access_token'], '')
        # user_info = google.get('userinfo')
        # user = storage.get_or_create_user(user_info.data['email'], user_info.data['id'])
        # login_user(user)
        return redirect(url_for('index'))
    
    
    class User(UserMixin):
        def __init__(self, id, username, email):
            self.id = id
            self.username = username
            self.email = email

    @login_manager.user_loader
    def load_user(user_id):
        user_data = storage.get_user_by_id(user_id)
        if user_data:
            return User(id=user_data['id'], username=user_data['username'], email=user_data['email'])
        return None

    @app.route('/')
    def index():
        return render_template('index.html')

    @app.route('/login', methods=['GET', 'POST'])
    def login():
        if request.method == 'POST':
            username = request.form.get('username')
            password = request.form.get('password')
            user = storage.authenticate_user(username, password)
            if user:
                login_user(User(id=user['id'], username=user['username'], email=user['email']))
                return redirect(url_for('dashboard'))
            else:
                return render_template('login.html', error='Invalid credentials')
        elif request.args.get('google'):
            return google.authorize(callback=url_for('authorized', _external=True))
        return render_template('login.html')

    @app.route('/logout')
    @login_required
    def logout():
        logout_user()
        return redirect(url_for('index'))

    @app.route('/dashboard')
    @login_required
    def dashboard():
        return render_template('dashboard.html')

    @app.route('/generate_api_key', methods=['POST'])
    @login_required
    def generate_api_key():
        api_key = secrets.token_urlsafe(32)
        storage.store_api_key(current_user.id, api_key)
        return jsonify({'api_key': api_key})

    @app.route('/wallet/<int:wallet_id>/transactions', methods=['GET'])
    @login_required
    def get_transactions(wallet_id):
        transactions = storage.get_transactions(wallet_id)
        return jsonify(transactions)

    @app.route('/wallet/<int:wallet_id>/holdings', methods=['GET'])
    @login_required
    def get_holdings(wallet_id):
        holdings = storage.get_holdings(wallet_id)
        return jsonify(holdings)

# Implement other routes for reports, price alerts, following accounts, etc.

    return app