from flask import Blueprint, request, jsonify, g
from app import db
from app.models.folder import Folder
from app.models.audit_log import AuditLog
from app.services.auth_service import require_jwt

folders_bp = Blueprint('folders', __name__)


def _client_ip():
    from flask import request as _req
    return _req.headers.get('X-Forwarded-For', _req.remote_addr or '').split(',')[0].strip()


@folders_bp.route('', methods=['GET'])
@require_jwt
def list_folders():
    folders = Folder.query.filter_by(user_id=g.current_user_id).order_by(Folder.name.asc()).all()
    return jsonify([f.to_dict() for f in folders]), 200


@folders_bp.route('', methods=['POST'])
@require_jwt
def create_folder():
    data = request.get_json(silent=True) or {}
    name = (data.get('name') or '').strip()
    if not name:
        return jsonify({'error': 'name is required'}), 400

    folder = Folder(user_id=g.current_user_id, name=name)
    db.session.add(folder)
    db.session.flush()  # populate folder.id before logging
    AuditLog.log(
        user_id=g.current_user_id,
        action='folder.create',
        resource_type='folder',
        resource_id=folder.id,
        detail=f'Created folder: "{name}"',
        ip_address=_client_ip(),
    )
    db.session.commit()
    return jsonify(folder.to_dict()), 201


@folders_bp.route('/<int:folder_id>', methods=['PUT'])
@require_jwt
def update_folder(folder_id):
    folder = Folder.query.filter_by(id=folder_id, user_id=g.current_user_id).first()
    if not folder:
        return jsonify({'error': 'Folder not found'}), 404

    data = request.get_json(silent=True) or {}
    name = (data.get('name') or '').strip()
    if not name:
        return jsonify({'error': 'name is required'}), 400
    old_name = folder.name
    folder.name = name
    AuditLog.log(
        user_id=g.current_user_id,
        action='folder.update',
        resource_type='folder',
        resource_id=folder.id,
        detail=f'Renamed folder: "{old_name}" → "{name}"',
        ip_address=_client_ip(),
    )
    db.session.commit()
    return jsonify(folder.to_dict()), 200


@folders_bp.route('/<int:folder_id>', methods=['DELETE'])
@require_jwt
def delete_folder(folder_id):
    folder = Folder.query.filter_by(id=folder_id, user_id=g.current_user_id).first()
    if not folder:
        return jsonify({'error': 'Folder not found'}), 404
    folder_name = folder.name
    folder_id = folder.id
    db.session.delete(folder)
    db.session.flush()
    AuditLog.log(
        user_id=g.current_user_id,
        action='folder.delete',
        resource_type='folder',
        resource_id=folder_id,
        detail=f'Deleted folder: "{folder_name}"',
        ip_address=_client_ip(),
    )
    db.session.commit()
    return jsonify({'message': 'Folder deleted'}), 200