import os

import click
from flask import Flask
from flask.cli import with_appcontext

from app.config import Config
from app.extensions import db, login_manager
from app.models import AdminUser
from app.routes.apply import apply_bp, restore_bp, settings_bp
from app.routes.auth import auth_bp
from app.routes.main import main_bp
from app.routes.mirrors import mirrors_bp
from app.routes.profiles import profiles_bp
from app.seed import seed_all
from app.services.applier import (
    ensure_initial_backup,
    emergency_restore_last_apply,
    restore_initial,
)
from app.services.backup import get_latest_apply_backup, restore_backup
from app.services.scheduler import init_scheduler


def create_app(config_class=Config) -> Flask:
    app = Flask(__name__)
    app.config.from_object(config_class)
    Config.ensure_dirs()

    db.init_app(app)
    login_manager.init_app(app)

    app.register_blueprint(auth_bp)
    app.register_blueprint(main_bp)
    app.register_blueprint(mirrors_bp)
    app.register_blueprint(profiles_bp)
    app.register_blueprint(apply_bp)
    app.register_blueprint(restore_bp)
    app.register_blueprint(settings_bp)

    with app.app_context():
        db.create_all()
        seed_all()
        _ensure_admin_user()
        ensure_initial_backup()

    if not app.config.get("TESTING") and not os.environ.get("DISABLE_SCHEDULER"):
        init_scheduler(app)

    _register_cli(app)
    return app


def _ensure_admin_user() -> None:
    if AdminUser.query.first():
        return
    user = AdminUser(username=Config.ADMIN_USERNAME)
    user.set_password(Config.ADMIN_PASSWORD)
    db.session.add(user)
    db.session.commit()


def _register_cli(app: Flask) -> None:
    @app.cli.command("init-db")
    @with_appcontext
    def init_db():
        db.create_all()
        seed_all()
        _ensure_admin_user()
        ensure_initial_backup()
        click.echo("Database initialized.")

    @app.cli.command("create-admin")
    @click.argument("username")
    @click.argument("password")
    @with_appcontext
    def create_admin(username, password):
        user = AdminUser.query.filter_by(username=username).first()
        if not user:
            user = AdminUser(username=username)
            db.session.add(user)
        user.set_password(password)
        db.session.commit()
        click.echo(f"Admin user '{username}' ready.")


@click.group()
def cli():
    """Mirror Manager CLI — قابل استفاده از SSH"""


@cli.command()
@click.option("--initial", is_flag=True, help="بازگردانی تنظیمات اولیه")
@click.option("--last", is_flag=True, help="آخرین backup قبل از apply")
@click.option("--backup", default=None, help="مسیر backup مشخص")
def restore(initial, backup, last):
    os.environ["DISABLE_SCHEDULER"] = "1"
    if not os.environ.get("HOST_ROOT"):
        os.environ.setdefault("HOST_ROOT", "/")
    if not os.environ.get("DATA_DIR"):
        os.environ.setdefault("DATA_DIR", "/var/lib/mirror-manager/data")
    app = create_app()
    with app.app_context():
        if initial:
            result = restore_initial()
        elif last:
            path = get_latest_apply_backup()
            if not path:
                click.echo("backup قبل از apply یافت نشد.")
                return
            click.echo(f"بازگردانی از: {path}")
            result = restore_backup(path)
        elif backup:
            result = restore_backup(backup)
        else:
            click.echo("یکی از --initial، --last یا --backup را مشخص کنید.")
            return
        if result.get("success"):
            click.echo("بازگردانی موفق:")
            for item in result.get("restored", []):
                click.echo(f"  - {item}")
        else:
            click.echo(f"خطا: {result.get('error')}")


@cli.command("emergency-restore")
def emergency_restore_cmd():
    """بازگردانی فوری آخرین backup قبل از apply — یک دستور"""
    os.environ["DISABLE_SCHEDULER"] = "1"
    if not os.environ.get("HOST_ROOT"):
        os.environ.setdefault("HOST_ROOT", "/")
    if not os.environ.get("DATA_DIR"):
        os.environ.setdefault("DATA_DIR", "/var/lib/mirror-manager/data")
    app = create_app()
    with app.app_context():
        result = emergency_restore_last_apply()
        if result.get("success"):
            click.echo(f"بازگردانی فوری موفق از: {result.get('backup_path', '')}")
            for item in result.get("restored", []):
                click.echo(f"  - {item}")
        else:
            click.echo(f"خطا: {result.get('error')}")


@cli.command()
def disable():
    container = os.environ.get("MIRROR_CONTAINER_NAME", "mirror-manager")
    import subprocess

    result = subprocess.run(["docker", "stop", container], capture_output=True, text=True)
    if result.returncode == 0:
        click.echo(f"سرویس {container} متوقف شد.")
    else:
        click.echo(f"خطا: {result.stderr or result.stdout}")
        click.echo("دستی: docker stop mirror-manager")


@cli.command()
def enable():
    container = os.environ.get("MIRROR_CONTAINER_NAME", "mirror-manager")
    import subprocess

    result = subprocess.run(["docker", "start", container], capture_output=True, text=True)
    if result.returncode == 0:
        click.echo(f"سرویس {container} راه‌اندازی شد.")
    else:
        click.echo(f"خطا: {result.stderr or result.stdout}")
        click.echo("دستی: docker compose up -d")


@cli.command()
def status():
    os.environ["DISABLE_SCHEDULER"] = "1"
    app = create_app()
    with app.app_context():
        from app.services.applier import get_system_status

        info = get_system_status()
        click.echo(f"Ubuntu: {info.get('ubuntu_description')}")
        click.echo(f"Host root: {info.get('host_root')}")


if __name__ == "__main__":
    cli()