"""
Standalone unit tests for Configuration Service Logic

Tests core configuration logic without requiring full package imports.
This focuses on testing the business logic that would be used by the
configuration service components.
"""

import pytest
import json
from unittest.mock import Mock, AsyncMock
from typing import Dict, Any


class MockConfigurationLogic:
    """Mock implementation of configuration logic for testing"""
    
    def __init__(self):
        self.data = {}
    
    def parse_key(self, full_key: str) -> tuple[str, str]:
        """Parse 'type.key' format into (type, key)"""
        if '.' not in full_key:
            raise ValueError(f"Invalid key format: {full_key}")
        type_name, key = full_key.split('.', 1)
        return type_name, key
    
    def validate_schema_json(self, schema_json: str) -> bool:
        """Validate that schema JSON is properly formatted"""
        try:
            schema = json.loads(schema_json)
            
            # Check required fields
            if "fields" not in schema:
                return False
                
            for field in schema["fields"]:
                if "name" not in field or "type" not in field:
                    return False
                    
                # Validate field type
                valid_types = ["string", "integer", "float", "boolean", "timestamp", "date", "time", "uuid"]
                if field["type"] not in valid_types:
                    return False
                    
            return True
        except (json.JSONDecodeError, KeyError):
            return False
    
    def put_values(self, values: Dict[str, str]) -> Dict[str, bool]:
        """Store configuration values, return success status for each"""
        results = {}
        
        for full_key, value in values.items():
            try:
                type_name, key = self.parse_key(full_key)
                
                # Validate schema if it's a schema type
                if type_name == "schema" and not self.validate_schema_json(value):
                    results[full_key] = False
                    continue
                
                # Store the value
                if type_name not in self.data:
                    self.data[type_name] = {}
                self.data[type_name][key] = value
                results[full_key] = True
                
            except Exception:
                results[full_key] = False
                
        return results
    
    def get_values(self, keys: list[str]) -> Dict[str, str | None]:
        """Retrieve configuration values"""
        results = {}
        
        for full_key in keys:
            try:
                type_name, key = self.parse_key(full_key)
                value = self.data.get(type_name, {}).get(key)
                results[full_key] = value
            except Exception:
                results[full_key] = None
                
        return results
    
    def delete_values(self, keys: list[str]) -> Dict[str, bool]:
        """Delete configuration values"""
        results = {}
        
        for full_key in keys:
            try:
                type_name, key = self.parse_key(full_key)
                if type_name in self.data and key in self.data[type_name]:
                    del self.data[type_name][key]
                    results[full_key] = True
                else:
                    results[full_key] = False
            except Exception:
                results[full_key] = False
                
        return results
    
    def list_keys(self, type_name: str) -> list[str]:
        """List all keys for a given type"""
        return list(self.data.get(type_name, {}).keys())
    
    def get_type_values(self, type_name: str) -> Dict[str, str]:
        """Get all key-value pairs for a type"""
        return dict(self.data.get(type_name, {}))
    
    def get_all_data(self) -> Dict[str, Dict[str, str]]:
        """Get all configuration data"""
        return dict(self.data)


class TestConfigurationLogic:
    """Test cases for configuration business logic"""
    
    @pytest.fixture
    def config_logic(self):
        return MockConfigurationLogic()
    
    @pytest.fixture
    def sample_schema_json(self):
        return json.dumps({
            "name": "customer_records",
            "description": "Customer information schema",
            "fields": [
                {
                    "name": "customer_id",
                    "type": "string",
                    "primary_key": True,
                    "required": True,
                    "indexed": True,
                    "description": "Unique customer identifier"
                },
                {
                    "name": "name",
                    "type": "string",
                    "required": True,
                    "description": "Customer full name"
                },
                {
                    "name": "email",
                    "type": "string",
                    "required": True,
                    "indexed": True,
                    "description": "Customer email address"
                }
            ]
        })
    
    def test_parse_key_valid(self, config_logic):
        """Test parsing valid configuration keys"""
        # Act & Assert
        type_name, key = config_logic.parse_key("schema.customer_records")
        assert type_name == "schema"
        assert key == "customer_records"
        
        type_name, key = config_logic.parse_key("flows.processing_flow")
        assert type_name == "flows"
        assert key == "processing_flow"
    
    def test_parse_key_invalid(self, config_logic):
        """Test parsing invalid configuration keys"""
        with pytest.raises(ValueError):
            config_logic.parse_key("invalid_key")
    
    def test_validate_schema_json_valid(self, config_logic, sample_schema_json):
        """Test validation of valid schema JSON"""
        assert config_logic.validate_schema_json(sample_schema_json) is True
    
    def test_validate_schema_json_invalid(self, config_logic):
        """Test validation of invalid schema JSON"""
        # Invalid JSON
        assert config_logic.validate_schema_json("not json") is False
        
        # Missing fields
        assert config_logic.validate_schema_json('{"name": "test"}') is False
        
        # Invalid field type
        invalid_schema = json.dumps({
            "fields": [{"name": "test", "type": "invalid_type"}]
        })
        assert config_logic.validate_schema_json(invalid_schema) is False
        
        # Missing field name
        invalid_schema2 = json.dumps({
            "fields": [{"type": "string"}]
        })
        assert config_logic.validate_schema_json(invalid_schema2) is False
    
    def test_put_values_success(self, config_logic, sample_schema_json):
        """Test storing configuration values successfully"""
        # Arrange
        values = {
            "schema.customer_records": sample_schema_json,
            "flows.test_flow": '{"steps": []}',
            "schema.product_catalog": json.dumps({
                "fields": [{"name": "sku", "type": "string"}]
            })
        }
        
        # Act
        results = config_logic.put_values(values)
        
        # Assert
        assert all(results.values())  # All should succeed
        assert len(results) == 3
        
        # Verify data was stored
        assert "schema" in config_logic.data
        assert "customer_records" in config_logic.data["schema"]
        assert config_logic.data["schema"]["customer_records"] == sample_schema_json
    
    def test_put_values_with_invalid_schema(self, config_logic):
        """Test storing values with invalid schema"""
        # Arrange
        values = {
            "schema.valid": json.dumps({"fields": [{"name": "id", "type": "string"}]}),
            "schema.invalid": "not valid json",
            "flows.test": '{"steps": []}'  # Non-schema should still work
        }
        
        # Act
        results = config_logic.put_values(values)
        
        # Assert
        assert results["schema.valid"] is True
        assert results["schema.invalid"] is False
        assert results["flows.test"] is True
        
        # Only valid values should be stored
        assert "valid" in config_logic.data.get("schema", {})
        assert "invalid" not in config_logic.data.get("schema", {})
        assert "test" in config_logic.data.get("flows", {})
    
    def test_get_values(self, config_logic, sample_schema_json):
        """Test retrieving configuration values"""
        # Arrange
        config_logic.data = {
            "schema": {"customer_records": sample_schema_json},
            "flows": {"test_flow": '{"steps": []}'}
        }
        
        keys = ["schema.customer_records", "schema.nonexistent", "flows.test_flow"]
        
        # Act
        results = config_logic.get_values(keys)
        
        # Assert
        assert results["schema.customer_records"] == sample_schema_json
        assert results["schema.nonexistent"] is None
        assert results["flows.test_flow"] == '{"steps": []}'
    
    def test_delete_values(self, config_logic, sample_schema_json):
        """Test deleting configuration values"""
        # Arrange
        config_logic.data = {
            "schema": {
                "customer_records": sample_schema_json,
                "product_catalog": '{"fields": []}'
            }
        }
        
        keys = ["schema.customer_records", "schema.nonexistent"]
        
        # Act
        results = config_logic.delete_values(keys)
        
        # Assert
        assert results["schema.customer_records"] is True
        assert results["schema.nonexistent"] is False
        
        # Verify deletion
        assert "customer_records" not in config_logic.data["schema"]
        assert "product_catalog" in config_logic.data["schema"]  # Should remain
    
    def test_list_keys(self, config_logic):
        """Test listing keys for a type"""
        # Arrange
        config_logic.data = {
            "schema": {"customer_records": "...", "product_catalog": "..."},
            "flows": {"flow1": "...", "flow2": "..."}
        }
        
        # Act
        schema_keys = config_logic.list_keys("schema")
        flow_keys = config_logic.list_keys("flows")
        empty_keys = config_logic.list_keys("nonexistent")
        
        # Assert
        assert set(schema_keys) == {"customer_records", "product_catalog"}
        assert set(flow_keys) == {"flow1", "flow2"}
        assert empty_keys == []
    
    def test_get_type_values(self, config_logic, sample_schema_json):
        """Test getting all values for a type"""
        # Arrange
        config_logic.data = {
            "schema": {
                "customer_records": sample_schema_json,
                "product_catalog": '{"fields": []}'
            }
        }
        
        # Act
        schema_values = config_logic.get_type_values("schema")
        
        # Assert
        assert len(schema_values) == 2
        assert schema_values["customer_records"] == sample_schema_json
        assert schema_values["product_catalog"] == '{"fields": []}'
    
    def test_get_all_data(self, config_logic):
        """Test getting all configuration data"""
        # Arrange
        test_data = {
            "schema": {"test_schema": "{}"},
            "flows": {"test_flow": "{}"}
        }
        config_logic.data = test_data
        
        # Act
        all_data = config_logic.get_all_data()
        
        # Assert
        assert all_data == test_data
        assert all_data is not config_logic.data  # Should be a copy


class TestSchemaValidationLogic:
    """Test schema validation business logic"""
    
    def test_valid_schema_all_field_types(self):
        """Test schema with all supported field types"""
        schema = {
            "name": "all_types_schema",
            "description": "Schema with all field types",
            "fields": [
                {"name": "text_field", "type": "string", "required": True},
                {"name": "int_field", "type": "integer", "size": 4},
                {"name": "bigint_field", "type": "integer", "size": 8},
                {"name": "float_field", "type": "float", "size": 4},
                {"name": "double_field", "type": "float", "size": 8},
                {"name": "bool_field", "type": "boolean"},
                {"name": "timestamp_field", "type": "timestamp"},
                {"name": "date_field", "type": "date"},
                {"name": "time_field", "type": "time"},
                {"name": "uuid_field", "type": "uuid"},
                {"name": "primary_field", "type": "string", "primary_key": True},
                {"name": "indexed_field", "type": "string", "indexed": True},
                {"name": "enum_field", "type": "string", "enum": ["active", "inactive"]}
            ]
        }
        
        schema_json = json.dumps(schema)
        logic = MockConfigurationLogic()
        
        assert logic.validate_schema_json(schema_json) is True
    
    def test_schema_field_constraints(self):
        """Test various schema field constraint scenarios"""
        logic = MockConfigurationLogic()
        
        # Test required vs optional fields
        schema_with_required = {
            "fields": [
                {"name": "required_field", "type": "string", "required": True},
                {"name": "optional_field", "type": "string", "required": False}
            ]
        }
        assert logic.validate_schema_json(json.dumps(schema_with_required)) is True
        
        # Test primary key fields
        schema_with_primary = {
            "fields": [
                {"name": "id", "type": "string", "primary_key": True},
                {"name": "data", "type": "string"}
            ]
        }
        assert logic.validate_schema_json(json.dumps(schema_with_primary)) is True
        
        # Test indexed fields
        schema_with_indexes = {
            "fields": [
                {"name": "searchable", "type": "string", "indexed": True},
                {"name": "non_searchable", "type": "string", "indexed": False}
            ]
        }
        assert logic.validate_schema_json(json.dumps(schema_with_indexes)) is True
    
    def test_configuration_versioning_logic(self):
        """Test configuration versioning concepts"""
        # This tests the logical concepts around versioning
        # that would be used in the actual implementation
        
        version_history = []
        
        def increment_version(current_version: int) -> int:
            new_version = current_version + 1
            version_history.append(new_version)
            return new_version
        
        def get_latest_version() -> int:
            return max(version_history) if version_history else 0
        
        # Test version progression
        assert get_latest_version() == 0
        
        v1 = increment_version(0)
        assert v1 == 1
        assert get_latest_version() == 1
        
        v2 = increment_version(v1)
        assert v2 == 2
        assert get_latest_version() == 2
        
        assert len(version_history) == 2