//! MCP memory management tests
//!
//! This module contains comprehensive tests for validating MCP tool calls
//! related to memory management operations. Tests cover data storage,
//! retrieval, caching, transactions, monitoring, and optimization
//! operations via the Model Context Protocol.

use serde_json::{Value, json};

#[cfg(test)]
mod tests {
    use super::*;

    /// Test memory store operation tool call request
    #[test]
    fn test_memory_store_tool_call_request() {
        let payload = json!({
            "method": "tools/call",
            "params": {
                "name": "memory_store",
                "arguments": {
                    "key": "user_session_12345",
                    "value": {
                        "user_id": "usr_001",
                        "preferences": {"theme": "dark", "language": "en"},
                        "session_start": "2024-01-15T10:30:00Z"
                    },
                    "ttl": 3600,
                    "namespace": "user_sessions"
                }
            },
            "id": 300
        });

        // Validate structure
        assert_eq!(payload["method"], "tools/call");
        assert_eq!(payload["params"]["name"], "memory_store");

        let args = &payload["params"]["arguments"];
        assert!(args["key"].is_string());
        assert!(args["value"].is_object());
        assert!(args["ttl"].is_number());
        assert!(args["namespace"].is_string());

        // Validate memory-specific requirements
        assert!(!args["key"].as_str().unwrap().is_empty());
        assert!(args["ttl"].as_u64().unwrap() > 0);
    }

    /// Test memory store operation tool call response
    #[test]
    fn test_memory_store_tool_call_response() {
        let response = json!({
            "jsonrpc": "2.0",
            "id": 300,
            "result": {
                "content": [
                    {
                        "type": "text",
                        "text": "Memory store successful. Key: user_session_12345, Size: 256 bytes, TTL: 3600 seconds"
                    }
                ]
            }
        });

        assert_eq!(response["jsonrpc"], "2.0");
        assert_eq!(response["id"], 300);

        let content_text = response["result"]["content"][0]["text"].as_str().unwrap();
        assert!(content_text.contains("Memory store successful"));
        assert!(content_text.contains("Key:"));
        assert!(content_text.contains("Size:"));
        assert!(content_text.contains("TTL:"));
    }

    /// Test memory retrieve operation tool call request
    #[test]
    fn test_memory_retrieve_tool_call_request() {
        let payload = json!({
            "method": "tools/call",
            "params": {
                "name": "memory_retrieve",
                "arguments": {
                    "key": "user_session_12345",
                    "namespace": "user_sessions",
                    "include_metadata": true
                }
            },
            "id": 301
        });

        assert_eq!(payload["method"], "tools/call");
        assert_eq!(payload["params"]["name"], "memory_retrieve");

        let args = &payload["params"]["arguments"];
        assert!(args["key"].is_string());
        assert!(args["namespace"].is_string());
        assert!(args["include_metadata"].is_boolean());
    }

    /// Test memory retrieve operation tool call response
    #[test]
    fn test_memory_retrieve_tool_call_response() {
        let response = json!({
            "jsonrpc": "2.0",
            "id": 301,
            "result": {
                "content": [
                    {
                        "type": "text",
                        "text": r#"Retrieved data: {"user_id": "usr_001", "preferences": {"theme": "dark"}} | Metadata: {Size: 256 bytes, TTL remaining: 3540 seconds, Created: 2024-01-15T10:30:00Z}"#
                    }
                ]
            }
        });

        let content_text = response["result"]["content"][0]["text"].as_str().unwrap();
        assert!(content_text.contains("Retrieved data:"));
        assert!(content_text.contains("Metadata:"));
        assert!(content_text.contains("TTL remaining:"));
    }

    /// Test cache operation tool call request
    #[test]
    fn test_cache_operation_tool_call_request() {
        let payload = json!({
            "method": "tools/call",
            "params": {
                "name": "cache_operate",
                "arguments": {
                    "operation": "set",
                    "key": "api_response_cache_001",
                    "value": {
                        "endpoint": "/api/users",
                        "response": {"users": []},
                        "timestamp": "2024-01-15T10:30:00Z"
                    },
                    "cache_policy": "LRU",
                    "max_size": 1000000
                }
            },
            "id": 302
        });

        let args = &payload["params"]["arguments"];
        assert!(
            ["set", "get", "delete", "clear", "stats"]
                .contains(&args["operation"].as_str().unwrap())
        );
        assert!(args["key"].is_string());
        assert!(["LRU", "LFU", "FIFO", "TTL"].contains(&args["cache_policy"].as_str().unwrap()));
        assert!(args["max_size"].as_u64().unwrap() > 0);
    }

    /// Test transaction management tool call request
    #[test]
    fn test_transaction_tool_call_request() {
        let payload = json!({
            "method": "tools/call",
            "params": {
                "name": "memory_transaction",
                "arguments": {
                    "action": "begin",
                    "transaction_id": "txn_001",
                    "isolation_level": "READ_COMMITTED",
                    "timeout": 30000
                }
            },
            "id": 303
        });

        let args = &payload["params"]["arguments"];
        assert!(
            ["begin", "commit", "rollback", "status"].contains(&args["action"].as_str().unwrap())
        );
        assert!(args["transaction_id"].is_string());
        assert!(
            [
                "READ_UNCOMMITTED",
                "READ_COMMITTED",
                "REPEATABLE_READ",
                "SERIALIZABLE"
            ]
            .contains(&args["isolation_level"].as_str().unwrap())
        );
        assert!(args["timeout"].as_u64().unwrap() > 0);
    }

    /// Test memory monitoring tool call request
    #[test]
    fn test_memory_monitoring_tool_call_request() {
        let payload = json!({
            "method": "tools/call",
            "params": {
                "name": "memory_monitor",
                "arguments": {
                    "metric": "usage_stats",
                    "namespace": "all",
                    "time_range": "1h",
                    "include_breakdown": true
                }
            },
            "id": 304
        });

        let args = &payload["params"]["arguments"];
        assert!(
            ["usage_stats", "performance", "errors", "capacity"]
                .contains(&args["metric"].as_str().unwrap())
        );
        assert!(args["namespace"].is_string());
        assert!(["1m", "5m", "1h", "24h"].contains(&args["time_range"].as_str().unwrap()));
        assert!(args["include_breakdown"].is_boolean());
    }

    /// Test memory monitoring tool call response
    #[test]
    fn test_memory_monitoring_tool_call_response() {
        let response = json!({
            "jsonrpc": "2.0",
            "id": 304,
            "result": {
                "content": [
                    {
                        "type": "text",
                        "text": "Memory Usage Stats: Total: 2.4GB, Used: 1.8GB (75%), Available: 600MB, Hit Rate: 94.2%, Operations/sec: 15,420"
                    }
                ]
            }
        });

        let content_text = response["result"]["content"][0]["text"].as_str().unwrap();
        assert!(content_text.contains("Memory Usage Stats"));
        assert!(content_text.contains("Total:"));
        assert!(content_text.contains("Hit Rate:"));
        assert!(content_text.contains("Operations/sec:"));
    }

    /// Test memory search/query tool call request
    #[test]
    fn test_memory_search_tool_call_request() {
        let payload = json!({
            "method": "tools/call",
            "params": {
                "name": "memory_search",
                "arguments": {
                    "query": {
                        "namespace": "user_sessions",
                        "filters": {
                            "user_id": "usr_001",
                            "session_active": true
                        },
                        "sort_by": "created_at",
                        "order": "desc"
                    },
                    "limit": 100,
                    "include_values": false
                }
            },
            "id": 305
        });

        let args = &payload["params"]["arguments"];
        assert!(args["query"].is_object());
        assert!(args["limit"].is_number());
        assert!(args["include_values"].is_boolean());

        let query = &args["query"];
        assert!(query["namespace"].is_string());
        assert!(query["filters"].is_object());
        assert!(["asc", "desc"].contains(&query["order"].as_str().unwrap()));
    }

    /// Test memory optimization tool call request
    #[test]
    fn test_memory_optimization_tool_call_request() {
        let payload = json!({
            "method": "tools/call",
            "params": {
                "name": "memory_optimize",
                "arguments": {
                    "operation": "garbage_collect",
                    "namespace": "user_sessions",
                    "strategy": "aggressive",
                    "preserve_active": true
                }
            },
            "id": 306
        });

        let args = &payload["params"]["arguments"];
        assert!(
            ["garbage_collect", "compact", "defragment", "vacuum"]
                .contains(&args["operation"].as_str().unwrap())
        );
        assert!(args["namespace"].is_string());
        assert!(
            ["conservative", "moderate", "aggressive"]
                .contains(&args["strategy"].as_str().unwrap())
        );
        assert!(args["preserve_active"].is_boolean());
    }

    /// Test memory backup tool call request
    #[test]
    fn test_memory_backup_tool_call_request() {
        let payload = json!({
            "method": "tools/call",
            "params": {
                "name": "memory_backup",
                "arguments": {
                    "operation": "create",
                    "backup_id": "backup_20240115_103000",
                    "namespaces": ["user_sessions", "api_cache"],
                    "compression": true,
                    "encryption": true
                }
            },
            "id": 307
        });

        let args = &payload["params"]["arguments"];
        assert!(
            ["create", "restore", "list", "delete"].contains(&args["operation"].as_str().unwrap())
        );
        assert!(args["backup_id"].is_string());
        assert!(args["namespaces"].is_array());
        assert!(args["compression"].is_boolean());
        assert!(args["encryption"].is_boolean());
    }

    /// Test memory replication tool call request
    #[test]
    fn test_memory_replication_tool_call_request() {
        let payload = json!({
            "method": "tools/call",
            "params": {
                "name": "memory_replicate",
                "arguments": {
                    "action": "sync",
                    "source_node": "memory_node_01",
                    "target_nodes": ["memory_node_02", "memory_node_03"],
                    "mode": "async",
                    "consistency": "eventual"
                }
            },
            "id": 308
        });

        let args = &payload["params"]["arguments"];
        assert!(["sync", "status", "configure"].contains(&args["action"].as_str().unwrap()));
        assert!(args["source_node"].is_string());
        assert!(args["target_nodes"].is_array());
        assert!(["sync", "async"].contains(&args["mode"].as_str().unwrap()));
        assert!(["strong", "eventual", "weak"].contains(&args["consistency"].as_str().unwrap()));
    }

    /// Test memory error response format
    #[test]
    fn test_memory_error_response() {
        let error_response = json!({
            "jsonrpc": "2.0",
            "id": 309,
            "result": {
                "isError": true,
                "content": [
                    {
                        "type": "text",
                        "text": "Memory operation failed: Key 'user_session_12345' not found in namespace 'user_sessions'"
                    }
                ]
            }
        });

        assert_eq!(error_response["result"]["isError"], true);
        let content_text = error_response["result"]["content"][0]["text"]
            .as_str()
            .unwrap();
        assert!(content_text.contains("Memory operation failed"));
        assert!(content_text.contains("not found"));
    }

    /// Test memory capacity management tool call
    #[test]
    fn test_memory_capacity_tool_call_request() {
        let payload = json!({
            "method": "tools/call",
            "params": {
                "name": "memory_capacity",
                "arguments": {
                    "action": "check",
                    "namespace": "user_sessions",
                    "threshold_warning": 0.8,
                    "threshold_critical": 0.95
                }
            },
            "id": 310
        });

        let args = &payload["params"]["arguments"];
        assert!(
            ["check", "expand", "shrink", "allocate"].contains(&args["action"].as_str().unwrap())
        );
        assert!(args["namespace"].is_string());
        assert!(args["threshold_warning"].as_f64().unwrap() > 0.0);
        assert!(
            args["threshold_critical"].as_f64().unwrap()
                > args["threshold_warning"].as_f64().unwrap()
        );
    }

    /// Test memory analytics tool call response
    #[test]
    fn test_memory_analytics_tool_call_response() {
        let response = json!({
            "jsonrpc": "2.0",
            "id": 311,
            "result": {
                "content": [
                    {
                        "type": "text",
                        "text": "Memory Analytics: Peak usage: 2.1GB at 14:30, Average: 1.6GB, Cache hit rate: 96.3%, Top consumers: user_sessions (45%), api_cache (32%), temp_data (23%)"
                    }
                ]
            }
        });

        let content_text = response["result"]["content"][0]["text"].as_str().unwrap();
        assert!(content_text.contains("Memory Analytics"));
        assert!(content_text.contains("Peak usage:"));
        assert!(content_text.contains("Cache hit rate:"));
        assert!(content_text.contains("Top consumers:"));
    }

    /// Test memory migration tool call request
    #[test]
    fn test_memory_migration_tool_call_request() {
        let payload = json!({
            "method": "tools/call",
            "params": {
                "name": "memory_migrate",
                "arguments": {
                    "source": "memory_tier_hot",
                    "destination": "memory_tier_warm",
                    "criteria": {
                        "age_hours": 24,
                        "access_frequency": "low",
                        "size_threshold": 1048576
                    },
                    "batch_size": 100
                }
            },
            "id": 312
        });

        let args = &payload["params"]["arguments"];
        assert!(args["source"].is_string());
        assert!(args["destination"].is_string());
        assert!(args["criteria"].is_object());
        assert!(args["batch_size"].is_number());

        let criteria = &args["criteria"];
        assert!(criteria["age_hours"].is_number());
        assert!(
            ["low", "medium", "high"].contains(&criteria["access_frequency"].as_str().unwrap())
        );
    }

    /// Test memory consistency check tool call
    #[test]
    fn test_memory_consistency_tool_call_request() {
        let payload = json!({
            "method": "tools/call",
            "params": {
                "name": "memory_consistency_check",
                "arguments": {
                    "scope": "namespace",
                    "target": "user_sessions",
                    "repair": false,
                    "verbose": true
                }
            },
            "id": 313
        });

        let args = &payload["params"]["arguments"];
        assert!(["namespace", "global", "key_range"].contains(&args["scope"].as_str().unwrap()));
        assert!(args["target"].is_string());
        assert!(args["repair"].is_boolean());
        assert!(args["verbose"].is_boolean());
    }

    /// Test that all memory tool calls maintain ID consistency
    #[test]
    fn test_memory_tool_id_consistency() {
        let test_cases = vec![
            ("memory_store", 400),
            ("memory_retrieve", 401),
            ("cache_operate", 402),
            ("memory_transaction", 403),
            ("memory_monitor", 404),
        ];

        for (tool_name, id) in test_cases {
            let request = json!({
                "method": "tools/call",
                "params": {
                    "name": tool_name,
                    "arguments": {}
                },
                "id": id
            });

            let response = json!({
                "jsonrpc": "2.0",
                "id": id,
                "result": {
                    "content": [
                        {
                            "type": "text",
                            "text": format!("{} operation completed", tool_name)
                        }
                    ]
                }
            });

            assert_eq!(request["id"], response["id"]);
        }
    }

    /// Test JSON serialization roundtrip for memory payloads
    #[test]
    fn test_memory_json_serialization_roundtrip() {
        let original_payload = json!({
            "method": "tools/call",
            "params": {
                "name": "memory_store",
                "arguments": {
                    "key": "test_key",
                    "value": {"nested": {"data": "value"}},
                    "ttl": 3600
                }
            },
            "id": 500
        });

        // Serialize to JSON string
        let json_string = serde_json::to_string(&original_payload).unwrap();

        // Deserialize back to Value
        let deserialized_payload: Value = serde_json::from_str(&json_string).unwrap();

        // Should be identical
        assert_eq!(original_payload, deserialized_payload);
    }

    /// Test memory performance metrics tool call
    #[test]
    fn test_memory_performance_metrics_tool_call_response() {
        let response = json!({
            "jsonrpc": "2.0",
            "id": 314,
            "result": {
                "content": [
                    {
                        "type": "text",
                        "text": "Performance Metrics: Read latency: 0.12ms avg, Write latency: 0.34ms avg, Throughput: 125,000 ops/sec, Memory efficiency: 87.5%"
                    }
                ]
            }
        });

        let content_text = response["result"]["content"][0]["text"].as_str().unwrap();
        assert!(content_text.contains("Performance Metrics"));
        assert!(content_text.contains("Read latency:"));
        assert!(content_text.contains("Write latency:"));
        assert!(content_text.contains("Throughput:"));
        assert!(content_text.contains("Memory efficiency:"));
    }
}

/// Helper functions for MCP memory management payload testing
pub mod mcp_memory_helpers {
    use super::*;

    /// Validate that a memory tool request has required parameters
    pub fn validate_memory_request(payload: &Value) -> Result<(), String> {
        let args = &payload["params"]["arguments"];
        let tool_name = payload["params"]["name"].as_str().unwrap();

        match tool_name {
            "memory_store" => {
                if !args["key"].is_string() || !args["value"].is_object() {
                    return Err("Store operation requires key and value".to_string());
                }
            }
            "memory_retrieve" => {
                if !args["key"].is_string() {
                    return Err("Retrieve operation requires key".to_string());
                }
            }
            "cache_operate" => {
                if !args["operation"].is_string() || !args["key"].is_string() {
                    return Err("Cache operation requires operation type and key".to_string());
                }
            }
            _ => {}
        }

        Ok(())
    }

    /// Create a memory tool request with standard parameters
    pub fn create_memory_request(tool_name: &str, key: &str, namespace: &str, id: u32) -> Value {
        json!({
            "method": "tools/call",
            "params": {
                "name": tool_name,
                "arguments": {
                    "key": key,
                    "namespace": namespace
                }
            },
            "id": id
        })
    }

    /// Validate memory response contains expected metadata
    pub fn validate_memory_response_metadata(response: &Value) -> Result<(), String> {
        let content = &response["result"]["content"];
        if !content.is_array() || content.as_array().unwrap().is_empty() {
            return Err("Missing content in memory response".to_string());
        }

        let content_text = content[0]["text"].as_str().unwrap_or("");

        // Check for common memory operation indicators
        let success_indicators = ["successful", "completed", "retrieved", "stored"];
        let has_success_indicator = success_indicators
            .iter()
            .any(|indicator| content_text.to_lowercase().contains(indicator));

        if !has_success_indicator && !content_text.contains("failed") {
            return Err("Response lacks clear operation status".to_string());
        }

        Ok(())
    }

    /// Create a memory monitoring request
    pub fn create_memory_monitoring_request(metric: &str, namespace: &str, id: u32) -> Value {
        json!({
            "method": "tools/call",
            "params": {
                "name": "memory_monitor",
                "arguments": {
                    "metric": metric,
                    "namespace": namespace,
                    "time_range": "1h",
                    "include_breakdown": true
                }
            },
            "id": id
        })
    }

    /// Validate memory capacity constraints
    pub fn validate_memory_capacity(args: &Value) -> Result<(), String> {
        if let Some(ttl) = args.get("ttl")
            && ttl.as_u64().unwrap_or(0) == 0
        {
            return Err("TTL must be positive".to_string());
        }

        if let Some(max_size) = args.get("max_size")
            && max_size.as_u64().unwrap_or(0) == 0
        {
            return Err("Max size must be positive".to_string());
        }

        Ok(())
    }
}
