from flask import render_template, request, session, redirect, url_for, flash
from .models import User
from . import db

# Settings module logic
import sqlite3
import os
def ensure_roles_table():
    instance_folder = os.path.abspath(os.path.join(os.path.dirname(__file__), '../../instance'))
    if not os.path.exists(instance_folder):
        os.makedirs(instance_folder)
    db_path = os.path.join(instance_folder, 'users.db')
    conn = sqlite3.connect(db_path)
    cursor = conn.cursor()
    cursor.execute("""
        CREATE TABLE IF NOT EXISTS roles (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            name TEXT UNIQUE NOT NULL,
            access_level TEXT NOT NULL,
            description TEXT
        )
    """)
    cursor.execute("""
        INSERT OR IGNORE INTO roles (name, access_level, description)
        VALUES (?, ?, ?)
    """, ('superadmin', 'full', 'Full access to all app areas and functions'))
    conn.commit()
    conn.close()
# List of roles (should match your app's roles)
ROLES = [
    'superadmin', 'admin', 'manager', 'warehouse_manager', 'warehouse_worker', 'quality_manager', 'quality_worker'
]

# Helper to check if current user is superadmin
def is_superadmin():
    return session.get('role') == 'superadmin'

# Route handler for editing access roles
def edit_access_roles_handler():
    if not is_superadmin():
        flash('Access denied: Superadmin only.')
        return redirect(url_for('main.dashboard'))
    ensure_roles_table()
    return render_template('edit_access_roles.html', roles=ROLES)

# Handler for updating role access (stub, to be implemented)
def update_role_access_handler(role):
    if not is_superadmin():
        flash('Access denied: Superadmin only.')
        return redirect(url_for('main.dashboard'))
    if role == 'superadmin':
        flash('Superadmin access cannot be changed.')
        return redirect(url_for('main.edit_access_roles'))
    access_level = request.form.get('access_level')
    # TODO: Save access_level for the role in the database or config
    flash(f'Access for role {role} updated to {access_level}.')
    return redirect(url_for('main.edit_access_roles'))

def settings_handler():
    if 'role' not in session or session['role'] != 'superadmin':
        flash('Access denied: Superadmin only.')
        return redirect(url_for('main.dashboard'))
    users = User.query.all()
    # Load external database settings from the instance folder
    external_settings = {}
    import os
    from flask import current_app
    settings_file = os.path.join(current_app.instance_path, 'external_server.conf')
    if os.path.exists(settings_file):
        with open(settings_file, 'r') as f:
            for line in f:
                key, value = line.strip().split('=', 1)
                external_settings[key] = value
    return render_template('settings.html', users=users, external_settings=external_settings)

# Add more settings-related functions here as needed