"""Supplier API routes."""
from flask_restx import Namespace, Resource, fields
from app.services.supplier_service import SupplierService
from app.utils.auth_decorator import require_auth

supplier_ns = Namespace('suppliers', description='供应商管理接口')

# API models for Swagger documentation
supplier_model = supplier_ns.model('Supplier', {
    'id': fields.Integer(readonly=True, description='供应商ID'),
    'name': fields.String(required=True, description='供应商名称'),
    'created_at': fields.String(readonly=True, description='创建时间'),
    'updated_at': fields.String(readonly=True, description='更新时间')
})

supplier_input = supplier_ns.model('SupplierInput', {
    'name': fields.String(required=True, description='供应商名称')
})

supplier_update = supplier_ns.model('SupplierUpdate', {
    'id': fields.Integer(required=True, description='供应商ID'),
    'name': fields.String(description='供应商名称')
})

supplier_delete = supplier_ns.model('SupplierDelete', {
    'id': fields.Integer(required=True, description='供应商ID')
})

# Response models
success_response = supplier_ns.model('SuccessResponse', {
    'success': fields.Boolean(description='操作是否成功'),
    'data': fields.Raw(description='返回数据'),
    'message': fields.String(description='消息')
})

error_response = supplier_ns.model('ErrorResponse', {
    'success': fields.Boolean(description='操作是否成功'),
    'error': fields.String(description='错误信息'),
    'code': fields.String(description='错误代码')
})


@supplier_ns.route('')
class SupplierList(Resource):
    """Resource for listing all suppliers."""
    
    @supplier_ns.doc('list_suppliers')
    @supplier_ns.response(200, 'Success', success_response)
    @require_auth
    def get(self):
        """获取所有供应商列表"""
        suppliers = SupplierService.get_all()
        return {
            'success': True,
            'data': suppliers,
            'message': 'Suppliers retrieved successfully'
        }, 200


@supplier_ns.route('/<int:id>')
@supplier_ns.param('id', '供应商ID')
class SupplierDetail(Resource):
    """Resource for getting a single supplier."""
    
    @supplier_ns.doc('get_supplier')
    @supplier_ns.response(200, 'Success', success_response)
    @supplier_ns.response(404, 'Supplier not found', error_response)
    @require_auth
    def get(self, id):
        """根据ID获取供应商信息"""
        supplier, error = SupplierService.get_by_id(id)
        if error:
            return {
                'success': False,
                'error': error,
                'code': 'NOT_FOUND'
            }, 404
        
        return {
            'success': True,
            'data': supplier,
            'message': 'Supplier retrieved successfully'
        }, 200


@supplier_ns.route('/create')
class SupplierCreate(Resource):
    """Resource for creating a supplier."""
    
    @supplier_ns.doc('create_supplier')
    @supplier_ns.expect(supplier_input)
    @supplier_ns.response(200, 'Success', success_response)
    @supplier_ns.response(400, 'Validation error', error_response)
    @require_auth
    def post(self):
        """创建新供应商"""
        data = supplier_ns.payload
        name = data.get('name', '')
        
        supplier, error = SupplierService.create(name)
        if error:
            code = 'DUPLICATE_NAME' if '已存在' in error else 'VALIDATION_ERROR'
            return {
                'success': False,
                'error': error,
                'code': code
            }, 400
        
        return {
            'success': True,
            'data': supplier,
            'message': 'Supplier created successfully'
        }, 200


@supplier_ns.route('/update')
class SupplierUpdate(Resource):
    """Resource for updating a supplier."""
    
    @supplier_ns.doc('update_supplier')
    @supplier_ns.expect(supplier_update)
    @supplier_ns.response(200, 'Success', success_response)
    @supplier_ns.response(400, 'Validation error', error_response)
    @supplier_ns.response(404, 'Supplier not found', error_response)
    @require_auth
    def post(self):
        """更新供应商信息"""
        data = supplier_ns.payload
        supplier_id = data.get('id')
        name = data.get('name')
        
        if not supplier_id:
            return {
                'success': False,
                'error': 'Supplier ID is required',
                'code': 'VALIDATION_ERROR'
            }, 400
        
        supplier, error = SupplierService.update(supplier_id, name)
        if error:
            if '未找到' in error:
                return {
                    'success': False,
                    'error': error,
                    'code': 'NOT_FOUND'
                }, 404
            code = 'DUPLICATE_NAME' if '已存在' in error else 'VALIDATION_ERROR'
            return {
                'success': False,
                'error': error,
                'code': code
            }, 400
        
        return {
            'success': True,
            'data': supplier,
            'message': 'Supplier updated successfully'
        }, 200


@supplier_ns.route('/delete')
class SupplierDelete(Resource):
    """Resource for deleting a supplier."""
    
    @supplier_ns.doc('delete_supplier')
    @supplier_ns.expect(supplier_delete)
    @supplier_ns.response(200, 'Success', success_response)
    @supplier_ns.response(400, 'Cannot delete', error_response)
    @supplier_ns.response(404, 'Supplier not found', error_response)
    @require_auth
    def post(self):
        """删除供应商"""
        data = supplier_ns.payload
        supplier_id = data.get('id')
        
        if not supplier_id:
            return {
                'success': False,
                'error': 'Supplier ID is required',
                'code': 'VALIDATION_ERROR'
            }, 400
        
        success, error = SupplierService.delete(supplier_id)
        if error:
            if '未找到' in error:
                return {
                    'success': False,
                    'error': error,
                    'code': 'NOT_FOUND'
                }, 404
            return {
                'success': False,
                'error': error,
                'code': 'FOREIGN_KEY_VIOLATION'
            }, 400
        
        return {
            'success': True,
            'data': None,
            'message': 'Supplier deleted successfully'
        }, 200