"""
Cloudflare Accounts Management Routes
"""
from flask import Blueprint, request, jsonify
from app.models import db, CloudflareAccount, AuditLog
from app.routes.auth import token_required
from app.config import Config
from functools import wraps

cf_accounts_bp = Blueprint('cf_accounts', __name__)

def internal_api_required(f):
    """Decorator for internal API endpoints (requires internal API key)"""
    @wraps(f)
    def decorated_function(*args, **kwargs):
        api_key = request.headers.get('X-Internal-API-Key')
        if not api_key or api_key != Config.CUSTOMER_API_INTERNAL_KEY:
            return jsonify({'error': 'Unauthorized - Invalid internal API key'}), 401
        return f(*args, **kwargs)
    return decorated_function

@cf_accounts_bp.route('', methods=['GET'])
@token_required
def get_cf_accounts(current_admin):
    """Get all CF accounts"""
    try:
        accounts = CloudflareAccount.query.order_by(CloudflareAccount.created_at.desc()).all()
        return jsonify({
            'status': 'success',
            'accounts': [acc.to_dict() for acc in accounts]
        }), 200
    except Exception as e:
        return jsonify({'error': str(e)}), 500

@cf_accounts_bp.route('/<int:account_id>', methods=['GET'])
@token_required
def get_cf_account(current_admin, account_id):
    """Get single CF account"""
    try:
        account = CloudflareAccount.query.get(account_id)
        if not account:
            return jsonify({'error': 'Account not found'}), 404
        
        return jsonify({
            'status': 'success',
            'account': account.to_dict(include_token=True)
        }), 200
    except Exception as e:
        return jsonify({'error': str(e)}), 500

@cf_accounts_bp.route('', methods=['POST'])
@token_required
def create_cf_account(current_admin):
    """Create new CF account"""
    try:
        data = request.get_json()
        
        required = ['name', 'email', 'api_token']
        for field in required:
            if not data.get(field):
                return jsonify({'error': f'{field} is required'}), 400
        
        account = CloudflareAccount(
            name=data['name'],
            email=data['email'],
            api_token=data['api_token'],  # TODO: Encrypt this
            max_domains=data.get('max_domains', 100),
            notes=data.get('notes'),
            is_active=data.get('is_active', True),
            use_for_verification=data.get('use_for_verification', True)
        )
        
        db.session.add(account)
        db.session.commit()
        
        # Log action
        log = AuditLog(
            admin_id=current_admin.id,
            action='create_cf_account',
            resource_type='cf_account',
            resource_id=account.id,
            details={'account_name': account.name},
            ip_address=request.remote_addr
        )
        db.session.add(log)
        db.session.commit()
        
        return jsonify({
            'status': 'success',
            'message': 'CF account created successfully',
            'account': account.to_dict()
        }), 201
        
    except Exception as e:
        db.session.rollback()
        return jsonify({'error': str(e)}), 500

@cf_accounts_bp.route('/<int:account_id>', methods=['PUT'])
@token_required
def update_cf_account(current_admin, account_id):
    """Update CF account"""
    try:
        account = CloudflareAccount.query.get(account_id)
        if not account:
            return jsonify({'error': 'Account not found'}), 404
        
        data = request.get_json()
        
        if 'name' in data:
            account.name = data['name']
        if 'email' in data:
            account.email = data['email']
        if 'api_token' in data and data['api_token']:
            account.api_token = data['api_token']  # TODO: Encrypt
        if 'max_domains' in data:
            account.max_domains = data['max_domains']
        if 'notes' in data:
            account.notes = data['notes']
        if 'is_active' in data:
            account.is_active = data['is_active']
        if 'use_for_verification' in data:
            account.use_for_verification = data['use_for_verification']
        
        db.session.commit()
        
        # Log action
        log = AuditLog(
            admin_id=current_admin.id,
            action='update_cf_account',
            resource_type='cf_account',
            resource_id=account.id,
            details={'account_name': account.name},
            ip_address=request.remote_addr
        )
        db.session.add(log)
        db.session.commit()
        
        return jsonify({
            'status': 'success',
            'message': 'CF account updated successfully',
            'account': account.to_dict()
        }), 200
        
    except Exception as e:
        db.session.rollback()
        return jsonify({'error': str(e)}), 500

@cf_accounts_bp.route('/<int:account_id>', methods=['DELETE'])
@token_required
def delete_cf_account(current_admin, account_id):
    """Delete CF account"""
    try:
        account = CloudflareAccount.query.get(account_id)
        if not account:
            return jsonify({'error': 'Account not found'}), 404
        
        if account.current_domains > 0:
            return jsonify({'error': 'Cannot delete account with active domains'}), 400
        
        account_name = account.name
        db.session.delete(account)
        db.session.commit()
        
        # Log action
        log = AuditLog(
            admin_id=current_admin.id,
            action='delete_cf_account',
            resource_type='cf_account',
            resource_id=account_id,
            details={'account_name': account_name},
            ip_address=request.remote_addr
        )
        db.session.add(log)
        db.session.commit()
        
        return jsonify({
            'status': 'success',
            'message': 'CF account deleted successfully'
        }), 200
        
    except Exception as e:
        db.session.rollback()
        return jsonify({'error': str(e)}), 500


# Internal API Endpoints (for Customer Panel)
@cf_accounts_bp.route('/internal/available', methods=['GET'])
@internal_api_required
def get_available_cf_accounts_internal():
    """
    Internal API endpoint for Customer Panel to fetch available CF accounts
    Requires X-Internal-API-Key header
    """
    try:
        # Get active CF accounts that are enabled for verification
        accounts = CloudflareAccount.query.filter_by(
            is_active=True,
            use_for_verification=True
        ).order_by(CloudflareAccount.created_at.desc()).all()

        result = []
        for account in accounts:
            account_dict = account.to_dict(include_token=False)
            # Calculate available capacity
            account_dict['available_capacity'] = account.max_domains - account.current_domains
            account_dict['is_full'] = account.current_domains >= account.max_domains
            result.append(account_dict)

        return jsonify({
            'status': 'success',
            'accounts': result,
            'total': len(result)
        }), 200

    except Exception as e:
        return jsonify({
            'status': 'error',
            'error': str(e)
        }), 500


@cf_accounts_bp.route('/internal/<int:account_id>', methods=['GET'])
@internal_api_required
def get_cf_account_internal(account_id):
    """
    Internal API endpoint to get specific CF account with API token
    Requires X-Internal-API-Key header
    """
    try:
        account = CloudflareAccount.query.get(account_id)
        if not account:
            return jsonify({
                'status': 'error',
                'error': 'Account not found'
            }), 404

        if not account.is_active or not account.use_for_verification:
            return jsonify({
                'status': 'error',
                'error': 'Account not available for verification'
            }), 403

        # Return account with API token (for internal use)
        account_dict = account.to_dict(include_token=True)

        return jsonify({
            'status': 'success',
            'account': account_dict
        }), 200

    except Exception as e:
        return jsonify({
            'status': 'error',
            'error': str(e)
        }), 500


@cf_accounts_bp.route('/internal/<int:account_id>/increment', methods=['POST'])
@internal_api_required
def increment_domain_count_internal(account_id):
    """
    Internal API endpoint to increment domain count
    Called when Customer Panel creates a domain using this CF account
    Requires X-Internal-API-Key header
    """
    try:
        account = CloudflareAccount.query.get(account_id)
        if not account:
            return jsonify({
                'status': 'error',
                'error': 'Account not found'
            }), 404

        if not account.is_active:
            return jsonify({
                'status': 'error',
                'error': 'Account is not active'
            }), 400

        # Check capacity
        if account.current_domains >= account.max_domains:
            return jsonify({
                'status': 'error',
                'error': f'Account is full ({account.current_domains}/{account.max_domains})'
            }), 400

        # Increment domain count
        old_count = account.current_domains
        account.current_domains += 1
        db.session.commit()

        return jsonify({
            'status': 'success',
            'message': 'Domain count incremented',
            'account_id': account.id,
            'old_count': old_count,
            'new_count': account.current_domains,
            'available_capacity': account.max_domains - account.current_domains
        }), 200

    except Exception as e:
        db.session.rollback()
        return jsonify({
            'status': 'error',
            'error': str(e)
        }), 500


@cf_accounts_bp.route('/internal/<int:account_id>/decrement', methods=['POST'])
@internal_api_required
def decrement_domain_count_internal(account_id):
    """
    Internal API endpoint to decrement domain count
    Called when Customer Panel deletes a domain using this CF account
    Requires X-Internal-API-Key header
    """
    try:
        account = CloudflareAccount.query.get(account_id)
        if not account:
            return jsonify({
                'status': 'error',
                'error': 'Account not found'
            }), 404

        # Decrement domain count (prevent negative)
        old_count = account.current_domains
        account.current_domains = max(0, account.current_domains - 1)
        db.session.commit()

        return jsonify({
            'status': 'success',
            'message': 'Domain count decremented',
            'account_id': account.id,
            'old_count': old_count,
            'new_count': account.current_domains,
            'available_capacity': account.max_domains - account.current_domains
        }), 200

    except Exception as e:
        db.session.rollback()
        return jsonify({
            'status': 'error',
            'error': str(e)
        }), 500