import pytest
from pydantic import ValidationError
from schemas import AdminLogin, CodeItem, CouponUploadItem, CouponUpload

class TestAdminLoginSchema:
    """Test cases for AdminLogin schema"""
    
    def test_valid_admin_login(self):
        """Test valid admin login data"""
        data = {
            "username": "testadmin",
            "password": "testpassword123"
        }
        
        admin_login = AdminLogin(**data)
        
        assert admin_login.username == "testadmin"
        assert admin_login.password == "testpassword123"
    
    def test_admin_login_missing_username(self):
        """Test admin login with missing username"""
        data = {
            "password": "testpassword123"
        }
        
        with pytest.raises(ValidationError) as exc_info:
            AdminLogin(**data)
        
        errors = exc_info.value.errors()
        assert len(errors) == 1
        assert errors[0]["loc"] == ("username",)
        assert errors[0]["type"] == "missing"
    
    def test_admin_login_missing_password(self):
        """Test admin login with missing password"""
        data = {
            "username": "testadmin"
        }
        
        with pytest.raises(ValidationError) as exc_info:
            AdminLogin(**data)
        
        errors = exc_info.value.errors()
        assert len(errors) == 1
        assert errors[0]["loc"] == ("password",)
        assert errors[0]["type"] == "missing"
    
    def test_admin_login_empty_username(self):
        """Test admin login with empty username"""
        data = {
            "username": "",
            "password": "testpassword123"
        }
        
        admin_login = AdminLogin(**data)
        assert admin_login.username == ""
    
    def test_admin_login_empty_password(self):
        """Test admin login with empty password"""
        data = {
            "username": "testadmin",
            "password": ""
        }
        
        admin_login = AdminLogin(**data)
        assert admin_login.password == ""
    
    def test_admin_login_whitespace_values(self):
        """Test admin login with whitespace values"""
        data = {
            "username": "   ",
            "password": "   "
        }
        
        admin_login = AdminLogin(**data)
        assert admin_login.username == "   "
        assert admin_login.password == "   "
    
    def test_admin_login_long_values(self):
        """Test admin login with long values"""
        long_username = "a" * 1000
        long_password = "b" * 1000
        
        data = {
            "username": long_username,
            "password": long_password
        }
        
        admin_login = AdminLogin(**data)
        assert admin_login.username == long_username
        assert admin_login.password == long_password
    
    def test_admin_login_special_characters(self):
        """Test admin login with special characters"""
        data = {
            "username": "admin@test.com",
            "password": "pass@word#123!"
        }
        
        admin_login = AdminLogin(**data)
        assert admin_login.username == "admin@test.com"
        assert admin_login.password == "pass@word#123!"
    
    def test_admin_login_unicode_characters(self):
        """Test admin login with unicode characters"""
        data = {
            "username": "admin_测试",
            "password": "password_测试"
        }
        
        admin_login = AdminLogin(**data)
        assert admin_login.username == "admin_测试"
        assert admin_login.password == "password_测试"
    
    def test_admin_login_model_dump(self):
        """Test admin login model serialization"""
        data = {
            "username": "testadmin",
            "password": "testpassword123"
        }
        
        admin_login = AdminLogin(**data)
        dumped = admin_login.model_dump()
        
        assert dumped == data
    
    def test_admin_login_model_json(self):
        """Test admin login model JSON serialization"""
        data = {
            "username": "testadmin",
            "password": "testpassword123"
        }
        
        admin_login = AdminLogin(**data)
        json_str = admin_login.model_dump_json()
        
        # Check for presence of fields in JSON (order may vary)
        assert "testadmin" in json_str
        assert "testpassword123" in json_str


class TestCodeItemSchema:
    """Test cases for CodeItem schema"""
    
    def test_valid_code_item(self):
        """Test valid code item data"""
        data = {
            "code": "TEST123",
            "usage": 0
        }
        
        code_item = CodeItem(**data)
        
        assert code_item.code == "TEST123"
        assert code_item.usage == 0
    
    def test_code_item_missing_code(self):
        """Test code item with missing code"""
        data = {
            "usage": 0
        }
        
        with pytest.raises(ValidationError) as exc_info:
            CodeItem(**data)
        
        errors = exc_info.value.errors()
        assert len(errors) == 1
        assert errors[0]["loc"] == ("code",)
        assert errors[0]["type"] == "missing"
    
    def test_code_item_missing_usage(self):
        """Test code item with missing usage"""
        data = {
            "code": "TEST123"
        }
        
        with pytest.raises(ValidationError) as exc_info:
            CodeItem(**data)
        
        errors = exc_info.value.errors()
        assert len(errors) == 1
        assert errors[0]["loc"] == ("usage",)
        assert errors[0]["type"] == "missing"
    
    def test_code_item_negative_usage(self):
        """Test code item with negative usage"""
        data = {
            "code": "TEST123",
            "usage": -5
        }
        
        code_item = CodeItem(**data)
        assert code_item.usage == -5
    
    def test_code_item_large_usage(self):
        """Test code item with large usage value"""
        data = {
            "code": "TEST123",
            "usage": 999999
        }
        
        code_item = CodeItem(**data)
        assert code_item.usage == 999999
    
    def test_code_item_zero_usage(self):
        """Test code item with zero usage"""
        data = {
            "code": "TEST123",
            "usage": 0
        }
        
        code_item = CodeItem(**data)
        assert code_item.usage == 0
    
    def test_code_item_empty_code(self):
        """Test code item with empty code"""
        data = {
            "code": "",
            "usage": 0
        }
        
        code_item = CodeItem(**data)
        assert code_item.code == ""
    
    def test_code_item_whitespace_code(self):
        """Test code item with whitespace code"""
        data = {
            "code": "  TEST123  ",
            "usage": 0
        }
        
        code_item = CodeItem(**data)
        assert code_item.code == "  TEST123  "
    
    def test_code_item_special_characters(self):
        """Test code item with special characters"""
        data = {
            "code": "TEST-123_ABC@456",
            "usage": 0
        }
        
        code_item = CodeItem(**data)
        assert code_item.code == "TEST-123_ABC@456"
    
    def test_code_item_unicode_characters(self):
        """Test code item with unicode characters"""
        data = {
            "code": "TEST测试123",
            "usage": 0
        }
        
        code_item = CodeItem(**data)
        assert code_item.code == "TEST测试123"
    
    def test_code_item_model_dump(self):
        """Test code item model serialization"""
        data = {
            "code": "TEST123",
            "usage": 5
        }
        
        code_item = CodeItem(**data)
        dumped = code_item.model_dump()
        
        assert dumped == data


class TestCouponUploadItemSchema:
    """Test cases for CouponUploadItem schema"""
    
    def test_valid_coupon_upload_item(self):
        """Test valid coupon upload item data"""
        data = {
            "code": "TEST123",
            "usage": 0
        }
        
        upload_item = CouponUploadItem(**data)
        
        assert upload_item.code == "TEST123"
        assert upload_item.usage == 0
    
    def test_coupon_upload_item_default_usage(self):
        """Test coupon upload item with default usage"""
        data = {
            "code": "TEST123"
            # usage not specified, should default to 0
        }
        
        upload_item = CouponUploadItem(**data)
        
        assert upload_item.code == "TEST123"
        assert upload_item.usage == 0
    
    def test_coupon_upload_item_missing_code(self):
        """Test coupon upload item with missing code"""
        data = {
            "usage": 0
        }
        
        with pytest.raises(ValidationError) as exc_info:
            CouponUploadItem(**data)
        
        errors = exc_info.value.errors()
        assert len(errors) == 1
        assert errors[0]["loc"] == ("code",)
        assert errors[0]["type"] == "missing"
    
    def test_coupon_upload_item_negative_usage(self):
        """Test coupon upload item with negative usage"""
        data = {
            "code": "TEST123",
            "usage": -10
        }
        
        upload_item = CouponUploadItem(**data)
        assert upload_item.usage == -10
    
    def test_coupon_upload_item_large_usage(self):
        """Test coupon upload item with large usage value"""
        data = {
            "code": "TEST123",
            "usage": 999999
        }
        
        upload_item = CouponUploadItem(**data)
        assert upload_item.usage == 999999
    
    def test_coupon_upload_item_empty_code(self):
        """Test coupon upload item with empty code"""
        data = {
            "code": "",
            "usage": 0
        }
        
        upload_item = CouponUploadItem(**data)
        assert upload_item.code == ""
    
    def test_coupon_upload_item_whitespace_code(self):
        """Test coupon upload item with whitespace code"""
        data = {
            "code": "  TEST123  ",
            "usage": 0
        }
        
        upload_item = CouponUploadItem(**data)
        assert upload_item.code == "  TEST123  "
    
    def test_coupon_upload_item_special_characters(self):
        """Test coupon upload item with special characters"""
        data = {
            "code": "TEST-123_ABC@456",
            "usage": 0
        }
        
        upload_item = CouponUploadItem(**data)
        assert upload_item.code == "TEST-123_ABC@456"
    
    def test_coupon_upload_item_model_dump(self):
        """Test coupon upload item model serialization"""
        data = {
            "code": "TEST123",
            "usage": 5
        }
        
        upload_item = CouponUploadItem(**data)
        dumped = upload_item.model_dump()
        
        assert dumped == data


class TestCouponUploadSchema:
    """Test cases for CouponUpload schema"""
    
    def test_valid_coupon_upload(self):
        """Test valid coupon upload data"""
        data = {
            "codes": [
                {"code": "TEST123", "usage": 0},
                {"code": "TEST456", "usage": 1}
            ]
        }
        
        upload = CouponUpload(**data)
        
        assert len(upload.codes) == 2
        assert upload.codes[0].code == "TEST123"
        assert upload.codes[0].usage == 0
        assert upload.codes[1].code == "TEST456"
        assert upload.codes[1].usage == 1
    
    def test_coupon_upload_empty_list(self):
        """Test coupon upload with empty codes list"""
        data = {
            "codes": []
        }
        
        upload = CouponUpload(**data)
        
        assert len(upload.codes) == 0
    
    def test_coupon_upload_missing_codes(self):
        """Test coupon upload with missing codes"""
        data = {}
        
        with pytest.raises(ValidationError) as exc_info:
            CouponUpload(**data)
        
        errors = exc_info.value.errors()
        assert len(errors) == 1
        assert errors[0]["loc"] == ("codes",)
        assert errors[0]["type"] == "missing"
    
    def test_coupon_upload_single_code(self):
        """Test coupon upload with single code"""
        data = {
            "codes": [
                {"code": "TEST123", "usage": 0}
            ]
        }
        
        upload = CouponUpload(**data)
        
        assert len(upload.codes) == 1
        assert upload.codes[0].code == "TEST123"
        assert upload.codes[0].usage == 0
    
    def test_coupon_upload_many_codes(self):
        """Test coupon upload with many codes"""
        codes_data = []
        for i in range(100):
            codes_data.append({"code": f"TEST{i:03d}", "usage": i % 3})
        
        data = {
            "codes": codes_data
        }
        
        upload = CouponUpload(**data)
        
        assert len(upload.codes) == 100
        for i, code_item in enumerate(upload.codes):
            assert code_item.code == f"TEST{i:03d}"
            assert code_item.usage == i % 3
    
    def test_coupon_upload_with_default_usage(self):
        """Test coupon upload with codes using default usage"""
        data = {
            "codes": [
                {"code": "TEST123"},  # usage not specified
                {"code": "TEST456", "usage": 5}
            ]
        }
        
        upload = CouponUpload(**data)
        
        assert len(upload.codes) == 2
        assert upload.codes[0].code == "TEST123"
        assert upload.codes[0].usage == 0  # Default value
        assert upload.codes[1].code == "TEST456"
        assert upload.codes[1].usage == 5
    
    def test_coupon_upload_duplicate_codes(self):
        """Test coupon upload with duplicate codes (should be allowed in schema)"""
        data = {
            "codes": [
                {"code": "TEST123", "usage": 0},
                {"code": "TEST123", "usage": 1}  # Duplicate code
            ]
        }
        
        upload = CouponUpload(**data)
        
        assert len(upload.codes) == 2
        assert upload.codes[0].code == "TEST123"
        assert upload.codes[0].usage == 0
        assert upload.codes[1].code == "TEST123"
        assert upload.codes[1].usage == 1
    
    def test_coupon_upload_special_characters(self):
        """Test coupon upload with special characters in codes"""
        data = {
            "codes": [
                {"code": "TEST-123", "usage": 0},
                {"code": "TEST_456", "usage": 1},
                {"code": "TEST@789", "usage": 2}
            ]
        }
        
        upload = CouponUpload(**data)
        
        assert len(upload.codes) == 3
        assert upload.codes[0].code == "TEST-123"
        assert upload.codes[1].code == "TEST_456"
        assert upload.codes[2].code == "TEST@789"
    
    def test_coupon_upload_unicode_characters(self):
        """Test coupon upload with unicode characters"""
        data = {
            "codes": [
                {"code": "TEST测试123", "usage": 0},
                {"code": "TEST测试456", "usage": 1}
            ]
        }
        
        upload = CouponUpload(**data)
        
        assert len(upload.codes) == 2
        assert upload.codes[0].code == "TEST测试123"
        assert upload.codes[1].code == "TEST测试456"
    
    def test_coupon_upload_model_dump(self):
        """Test coupon upload model serialization"""
        data = {
            "codes": [
                {"code": "TEST123", "usage": 0},
                {"code": "TEST456", "usage": 1}
            ]
        }
        
        upload = CouponUpload(**data)
        dumped = upload.model_dump()
        
        assert dumped == data
    
    def test_coupon_upload_model_json(self):
        """Test coupon upload model JSON serialization"""
        data = {
            "codes": [
                {"code": "TEST123", "usage": 0},
                {"code": "TEST456", "usage": 1}
            ]
        }
        
        upload = CouponUpload(**data)
        json_str = upload.model_dump_json()
        
        # Check for presence of fields in JSON (order may vary)
        assert "TEST123" in json_str
        assert "TEST456" in json_str
        assert "0" in json_str
        assert "1" in json_str
    
    def test_coupon_upload_invalid_code_item(self):
        """Test coupon upload with invalid code item"""
        data = {
            "codes": [
                {"code": "TEST123", "usage": 0},
                {"usage": 1}  # Missing code field
            ]
        }
        
        with pytest.raises(ValidationError) as exc_info:
            CouponUpload(**data)
        
        errors = exc_info.value.errors()
        assert len(errors) >= 1
        # Should have error for missing code field in second item