from flask import Blueprint, render_template, request, redirect, url_for, flash
from flask_login import login_required, login_user, logout_user, current_user
from werkzeug.security import generate_password_hash, check_password_hash
from database import JSONDatabase
import os
import math

main = Blueprint('main', __name__)
db = JSONDatabase(os.path.join(os.path.dirname(__file__), 'data'))

@main.route('/')
def home():
    gangs = db.get_all_gangs()[:3]  # Get latest 3 gangs
    blogs = db.get_all_blogs()[:3]  # Get latest 3 blogs
    return render_template('home.html', gangs=gangs, blogs=blogs)

@main.route('/gangs')
def gangs():
    page = request.args.get('page', 1, type=int)
    per_page = 6  # Number of gangs per page
    
    all_gangs = db.get_all_gangs()
    total_gangs = len(all_gangs)
    total_pages = math.ceil(total_gangs / per_page)
    
    # Calculate start and end indices for the current page
    start_idx = (page - 1) * per_page
    end_idx = start_idx + per_page
    
    # Get gangs for current page
    gangs_page = all_gangs[start_idx:end_idx]
    
    pagination = {
        'page': page,
        'per_page': per_page,
        'total': total_gangs,
        'pages': total_pages,
        'has_prev': page > 1,
        'has_next': page < total_pages
    }
    
    return render_template('gangs.html', gangs=gangs_page, pagination=pagination)

@main.route('/gang/<int:gang_id>')
def gang_detail(gang_id):
    gang = db.get_gang(gang_id)
    if gang is None:
        flash('Gang not found!', 'error')
        return redirect(url_for('main.gangs'))
    return render_template('gang_detail.html', gang=gang)

@main.route('/blogs')
def blogs():
    page = request.args.get('page', 1, type=int)
    per_page = 6  # Number of blogs per page
    
    all_blogs = db.get_all_blogs()
    total_blogs = len(all_blogs)
    total_pages = math.ceil(total_blogs / per_page)
    
    # Calculate start and end indices for the current page
    start_idx = (page - 1) * per_page
    end_idx = start_idx + per_page
    
    # Get blogs for current page
    blogs_page = all_blogs[start_idx:end_idx]
    
    pagination = {
        'page': page,
        'per_page': per_page,
        'total': total_blogs,
        'pages': total_pages,
        'has_prev': page > 1,
        'has_next': page < total_pages
    }
    
    return render_template('blogs.html', blogs=blogs_page, pagination=pagination)

@main.route('/blog/<int:blog_id>')
def blog_detail(blog_id):
    blog = db.get_blog(blog_id)
    if blog is None:
        flash('Blog not found!', 'error')
        return redirect(url_for('main.blogs'))
    return render_template('blog_detail.html', blog=blog)

@main.route('/login', methods=['GET', 'POST'])
def login():
    if current_user.is_authenticated:
        return redirect(url_for('admin.index'))
        
    if request.method == 'POST':
        username = request.form.get('username')
        password = request.form.get('password')
        
        # Check against environment variables
        if username == os.getenv('ADMIN_USERNAME') and password == os.getenv('ADMIN_PASSWORD'):
            user = db.get_user(username)
            login_user(user)
            flash('Logged in successfully.')
            return redirect(url_for('admin.index'))
        flash('Invalid username or password')
    return render_template('login.html')

@main.route('/logout')
@login_required
def logout():
    logout_user()
    flash('Logged out successfully.')
    return redirect(url_for('main.home'))