"""
Customer Routes - Domain Management
Customer-specific endpoints with isolation
"""
from flask import Blueprint, request, jsonify
from app.models.domain import db, Domain, DNSRecord
from app.models.user import Customer
from app.services.auth_service import token_required
from app.services.admin_api_service import AdminAPIService
from datetime import datetime

customer_bp = Blueprint('customer', __name__, url_prefix='/api/customer')


@customer_bp.route('/domains', methods=['GET'])
@token_required
def get_domains(current_user):
    """Get all domains for the current customer"""
    try:
        # Get customer
        customer = current_user.customer
        if not customer:
            return jsonify({'error': 'Customer profile not found'}), 404
        
        # Get domains with customer isolation
        domains = Domain.query.filter_by(customer_id=customer.id).all()

        # Fetch CF account names from Admin Panel (batch)
        cf_account_names = {}
        if domains:
            # Get unique CF account IDs
            cf_account_ids = set(
                d.cf_account_id for d in domains
                if d.cf_account_type == 'company' and d.cf_account_id
            )

            if cf_account_ids:
                admin_api = AdminAPIService()
                accounts_result = admin_api.get_available_cf_accounts()

                if accounts_result['status'] == 'success':
                    for acc in accounts_result.get('accounts', []):
                        cf_account_names[acc['id']] = acc['name']

        # Add CF account info
        result = []
        for domain in domains:
            domain_dict = domain.to_dict()

            # Add CF account name if using company account
            if domain.cf_account_type == 'company' and domain.cf_account_id:
                domain_dict['cf_account_name'] = cf_account_names.get(
                    domain.cf_account_id,
                    f'CF Account #{domain.cf_account_id}'
                )
            else:
                domain_dict['cf_account_name'] = 'Own Account'

            # Add DNS record count
            domain_dict['dns_record_count'] = len(domain.dns_records)

            result.append(domain_dict)
        
        return jsonify({
            'domains': result,
            'total': len(result),
            'limit': customer.max_domains
        }), 200
        
    except Exception as e:
        return jsonify({'error': str(e)}), 500


@customer_bp.route('/domains/<int:domain_id>', methods=['GET'])
@token_required
def get_domain(current_user, domain_id):
    """Get specific domain details"""
    try:
        customer = current_user.customer
        if not customer:
            return jsonify({'error': 'Customer profile not found'}), 404
        
        # Get domain with customer isolation
        domain = Domain.query.filter_by(
            id=domain_id,
            customer_id=customer.id
        ).first()
        
        if not domain:
            return jsonify({'error': 'Domain not found'}), 404
        
        domain_dict = domain.to_dict()

        # Add CF account info from Admin Panel
        if domain.cf_account_type == 'company' and domain.cf_account_id:
            admin_api = AdminAPIService()
            account_result = admin_api.get_cf_account(domain.cf_account_id)

            if account_result['status'] == 'success':
                domain_dict['cf_account_name'] = account_result['account']['name']
            else:
                domain_dict['cf_account_name'] = f'CF Account #{domain.cf_account_id}'
        else:
            domain_dict['cf_account_name'] = 'Own Account'

        # Add DNS records
        domain_dict['dns_records'] = [record.to_dict() for record in domain.dns_records]

        return jsonify(domain_dict), 200
        
    except Exception as e:
        return jsonify({'error': str(e)}), 500


@customer_bp.route('/domains', methods=['POST'])
@token_required
def create_domain(current_user):
    """Create a new domain"""
    try:
        customer = current_user.customer
        if not customer:
            return jsonify({'error': 'Customer profile not found'}), 404
        
        data = request.get_json()
        
        # Validate required fields
        if not data.get('domain_name'):
            return jsonify({'error': 'domain_name is required'}), 400
        
        domain_name = data['domain_name'].lower().strip()
        
        # Check domain limit
        current_count = Domain.query.filter_by(customer_id=customer.id).count()
        if current_count >= customer.max_domains:
            return jsonify({
                'error': f'Domain limit reached. Maximum {customer.max_domains} domains allowed.'
            }), 403
        
        # Check if domain already exists
        existing = Domain.query.filter_by(domain_name=domain_name).first()
        if existing:
            return jsonify({'error': 'Domain already exists'}), 409
        
        # Validate CF account if using company account
        cf_account_id = data.get('cf_account_id')
        cf_account_type = data.get('cf_account_type', 'company')
        cf_account_data = None

        if cf_account_type == 'company':
            # Fetch available CF accounts from Admin Panel
            admin_api = AdminAPIService()

            # Otomatik hesap seçimi - cf_account_id verilmemişse en uygun hesabı seç
            if not cf_account_id:
                accounts_result = admin_api.get_available_cf_accounts()

                if accounts_result['status'] != 'success' or not accounts_result.get('accounts'):
                    return jsonify({
                        'error': 'No available Cloudflare account found. Please contact administrator.'
                    }), 404

                # En az dolu hesabı seç
                available_accounts = [
                    acc for acc in accounts_result['accounts']
                    if not acc.get('is_full', True)
                ]

                if not available_accounts:
                    return jsonify({
                        'error': 'All Cloudflare accounts are full. Please contact administrator.'
                    }), 404

                # En az dolu olanı seç
                cf_account_data = min(available_accounts, key=lambda x: x.get('current_domains', 0))
                cf_account_id = cf_account_data['id']
            else:
                # Manuel seçim yapılmışsa o hesabı Admin Panel'den çek
                account_result = admin_api.get_cf_account(cf_account_id)

                if account_result['status'] != 'success':
                    return jsonify({
                        'error': account_result.get('error', 'Cloudflare account not found')
                    }), 404

                cf_account_data = account_result['account']

            # Validate account
            if cf_account_data.get('is_full', True):
                return jsonify({
                    'error': f'Cloudflare account is full ({cf_account_data.get("max_domains", 0)} domains max)'
                }), 400
        
        # Create zone in Cloudflare if using company account
        cf_zone_id = None
        cf_nameservers = []
        cf_api_token = None

        if cf_account_type == 'company' and cf_account_id:
            # Get CF account with API token from Admin Panel
            admin_api = AdminAPIService()
            account_result = admin_api.get_cf_account(cf_account_id)

            if account_result['status'] != 'success':
                return jsonify({
                    'error': f"Failed to get CF account: {account_result.get('error')}"
                }), 500

            cf_api_token = account_result['account'].get('api_token')
            if not cf_api_token:
                return jsonify({
                    'error': 'CF account API token not found'
                }), 500

            # Create zone in Cloudflare
            from app.services.cloudflare_service import CloudflareService
            cf_service = CloudflareService(cf_api_token)
            zone_result = cf_service.create_zone(domain_name)

            if zone_result['status'] != 'success':
                return jsonify({
                    'error': f"Failed to create Cloudflare zone: {zone_result.get('message', 'Unknown error')}"
                }), 500

            cf_zone_id = zone_result['zone_id']
            cf_nameservers = zone_result.get('nameservers', [])

        # Create domain in database
        domain = Domain(
            domain_name=domain_name,
            customer_id=customer.id,
            created_by=current_user.id,
            project_name=data.get('project_name'),
            use_cloudflare=data.get('use_cloudflare', True),
            cf_account_type=cf_account_type,
            cf_account_id=cf_account_id if cf_account_type == 'company' else None,
            cf_zone_id=cf_zone_id,
            cf_proxy_enabled=data.get('cf_proxy_enabled', True),
            status='pending'
        )

        # If using own CF account, save encrypted token
        if cf_account_type == 'own' and data.get('cf_api_token'):
            domain.set_cf_api_token(data['cf_api_token'])

        db.session.add(domain)
        db.session.commit()

        # Increment domain count in Admin Panel if using company account
        if cf_account_type == 'company' and cf_account_id:
            admin_api = AdminAPIService()
            increment_result = admin_api.increment_domain_count(cf_account_id)

            if increment_result['status'] != 'success':
                # Log warning but don't fail the request
                # Domain is already created in customer DB
                print(f"Warning: Failed to increment domain count in Admin Panel: {increment_result.get('error')}")

        return jsonify({
            'message': 'Domain created successfully',
            'domain': domain.to_dict(),
            'cf_account_name': cf_account_data.get('name') if cf_account_data else None,
            'nameservers': cf_nameservers
        }), 201

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


@customer_bp.route('/domains/<int:domain_id>', methods=['PUT'])
@token_required
def update_domain(current_user, domain_id):
    """Update domain"""
    try:
        customer = current_user.customer
        if not customer:
            return jsonify({'error': 'Customer profile not found'}), 404

        # Get domain with customer isolation
        domain = Domain.query.filter_by(
            id=domain_id,
            customer_id=customer.id
        ).first()

        if not domain:
            return jsonify({'error': 'Domain not found'}), 404

        data = request.get_json()

        # Update allowed fields
        if 'project_name' in data:
            domain.project_name = data['project_name']

        if 'cf_proxy_enabled' in data:
            domain.cf_proxy_enabled = data['cf_proxy_enabled']

        if 'status' in data and data['status'] in ['pending', 'active', 'suspended', 'error']:
            domain.status = data['status']

        domain.updated_at = datetime.utcnow()
        db.session.commit()

        return jsonify({
            'message': 'Domain updated successfully',
            'domain': domain.to_dict()
        }), 200

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


@customer_bp.route('/domains/<int:domain_id>', methods=['DELETE'])
@token_required
def delete_domain(current_user, domain_id):
    """Delete domain"""
    try:
        customer = current_user.customer
        if not customer:
            return jsonify({'error': 'Customer profile not found'}), 404

        # Get domain with customer isolation
        domain = Domain.query.filter_by(
            id=domain_id,
            customer_id=customer.id
        ).first()

        if not domain:
            return jsonify({'error': 'Domain not found'}), 404

        # Store CF account info before deletion
        cf_account_id = domain.cf_account_id
        cf_account_type = domain.cf_account_type

        # Delete domain
        db.session.delete(domain)
        db.session.commit()

        # Decrement domain count in Admin Panel if using company account
        if cf_account_type == 'company' and cf_account_id:
            admin_api = AdminAPIService()
            decrement_result = admin_api.decrement_domain_count(cf_account_id)

            if decrement_result['status'] != 'success':
                # Log warning but don't fail the request
                # Domain is already deleted from customer DB
                print(f"Warning: Failed to decrement domain count in Admin Panel: {decrement_result.get('error')}")

        return jsonify({'message': 'Domain deleted successfully'}), 200

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


@customer_bp.route('/domains/<int:domain_id>/dns', methods=['GET'])
@token_required
def get_domain_dns(current_user, domain_id):
    """Get DNS records for a domain"""
    try:
        customer = current_user.customer
        if not customer:
            return jsonify({'error': 'Customer profile not found'}), 404

        # Get domain with customer isolation
        domain = Domain.query.filter_by(
            id=domain_id,
            customer_id=customer.id
        ).first()

        if not domain:
            return jsonify({'error': 'Domain not found'}), 404

        records = [record.to_dict() for record in domain.dns_records]

        return jsonify({
            'domain': domain.domain_name,
            'records': records,
            'total': len(records)
        }), 200

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


@customer_bp.route('/cloudflare-accounts', methods=['GET'])
@token_required
def get_cloudflare_accounts(current_user):
    """Get available Cloudflare accounts from Admin Panel API"""
    try:
        # Fetch CF accounts from Admin Panel API
        admin_api = AdminAPIService()
        result = admin_api.get_available_cf_accounts()

        if result['status'] == 'error':
            return jsonify({
                'error': result.get('error', 'Failed to fetch CF accounts from Admin Panel'),
                'accounts': [],
                'total': 0
            }), 500

        return jsonify({
            'accounts': result.get('accounts', []),
            'total': result.get('total', 0)
        }), 200

    except Exception as e:
        return jsonify({
            'error': str(e),
            'accounts': [],
            'total': 0
        }), 500


@customer_bp.route('/stats', methods=['GET'])
@token_required
def get_customer_stats(current_user):
    """Get customer statistics"""
    try:
        customer = current_user.customer
        if not customer:
            return jsonify({'error': 'Customer profile not found'}), 404

        # Count domains by status
        total_domains = Domain.query.filter_by(customer_id=customer.id).count()
        active_domains = Domain.query.filter_by(customer_id=customer.id, status='active').count()
        pending_domains = Domain.query.filter_by(customer_id=customer.id, status='pending').count()

        return jsonify({
            'total_domains': total_domains,
            'active_domains': active_domains,
            'pending_domains': pending_domains,
            'max_domains': customer.max_domains,
            'available_slots': customer.max_domains - total_domains,
            'subscription_plan': customer.subscription_plan
        }), 200

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