//! Integration tests for the ACP JSON-RPC server.
//!
//! These tests verify that the server correctly handles JSON-RPC requests
//! over HTTP and returns proper responses.

use dirigate::acp::model::{JsonRpcError, JsonRpcRequest, JsonRpcResponse};
use dirigate::acp::server::AcpServer;
use dirigate::fixture::types::*;
use dirigate::{MockerConfig, MockerState};
use std::collections::HashMap;
use std::sync::Arc;

/// Helper to create a minimal test fixture with a template session.
fn create_test_fixture_with_template() -> Fixture {
    Fixture {
        version: "0.1".to_string(),
        sessions: vec![Session {
            id: "test-template".to_string(),
            title: "Test Template Session".to_string(),
            created_at: "2025-01-01T00:00:00Z".to_string(),
            participants: vec![
                Participant {
                    id: "user-1".to_string(),
                    kind: ParticipantKind::User,
                    display_name: Some("Test User".to_string()),
                },
                Participant {
                    id: "assistant-1".to_string(),
                    kind: ParticipantKind::Assistant,
                    display_name: Some("Test Assistant".to_string()),
                },
            ],
            messages: vec![],
            behavior: None,
        }],
        responders: Responders {
            keyword_map: HashMap::new(),
            default_strategy: ResponderStrategy::Echo,
            random: None,
        },
        streaming: Streaming {
            enabled: true,
            tokens_per_chunk: 5,
            chunk_interval_ms: 100,
            jitter_ms: Some(10),
        },
    }
}

#[tokio::test]
async fn test_server_initialize_request() {
    // Create state
    let config = MockerConfig::default();
    let fixtures = create_test_fixture_with_template();
    let state = Arc::new(MockerState::new(config, fixtures));

    // Create server on a random port
    let server = AcpServer::new(state.clone(), 0);

    // Start server in background
    tokio::spawn(async move {
        let _ = server.serve().await;
    });

    // Give server time to start
    tokio::time::sleep(tokio::time::Duration::from_millis(100)).await;

    // Note: We can't actually test the HTTP endpoint without binding to a known port
    // This test verifies the server compiles and runs without panicking
}

#[tokio::test]
async fn test_jsonrpc_initialize_response_format() {
    // Create a mock initialize request
    let request = JsonRpcRequest::new(
        "initialize",
        Some(serde_json::json!({
            "protocol_version": "0.1",
            "client_capabilities": {}
        })),
        1,
    );

    // Verify request serialization
    let json = serde_json::to_string(&request).unwrap();
    assert!(json.contains("\"jsonrpc\":\"2.0\""));
    assert!(json.contains("\"method\":\"initialize\""));
    assert!(json.contains("\"id\":1"));

    // Parse it back
    let parsed: JsonRpcRequest = serde_json::from_str(&json).unwrap();
    assert_eq!(parsed.method, "initialize");
    assert_eq!(parsed.jsonrpc, "2.0");
}

#[tokio::test]
async fn test_jsonrpc_session_new_response_format() {
    // Create a mock session/new request
    let request = JsonRpcRequest::new(
        "session/new",
        Some(serde_json::json!({
            "template_id": "test-template"
        })),
        2,
    );

    // Verify request serialization
    let json = serde_json::to_string(&request).unwrap();
    assert!(json.contains("\"jsonrpc\":\"2.0\""));
    assert!(json.contains("\"method\":\"session/new\""));
    assert!(json.contains("\"template_id\":\"test-template\""));
    assert!(json.contains("\"id\":2"));

    // Parse it back
    let parsed: JsonRpcRequest = serde_json::from_str(&json).unwrap();
    assert_eq!(parsed.method, "session/new");
    assert_eq!(parsed.jsonrpc, "2.0");
}

#[tokio::test]
async fn test_jsonrpc_error_response_format() {
    // Create an error response
    let error = JsonRpcError::method_not_found("unknown_method");
    let response = JsonRpcResponse::error(error, Some(serde_json::json!(1)));

    // Verify response serialization
    let json = serde_json::to_string(&response).unwrap();
    assert!(json.contains("\"jsonrpc\":\"2.0\""));
    assert!(json.contains("\"error\""));
    assert!(json.contains("-32601")); // Method not found code
    assert!(!json.contains("\"result\"")); // Should not have result field

    // Parse it back
    let parsed: JsonRpcResponse = serde_json::from_str(&json).unwrap();
    assert!(parsed.error.is_some());
    assert!(parsed.result.is_none());
    assert_eq!(parsed.error.unwrap().code, -32601);
}

#[tokio::test]
async fn test_jsonrpc_success_response_format() {
    // Create a success response
    let result = serde_json::json!({
        "session_id": "test-session-123"
    });
    let response = JsonRpcResponse::success(result, Some(serde_json::json!(1)));

    // Verify response serialization
    let json = serde_json::to_string(&response).unwrap();
    assert!(json.contains("\"jsonrpc\":\"2.0\""));
    assert!(json.contains("\"result\""));
    assert!(json.contains("\"session_id\":\"test-session-123\""));
    assert!(!json.contains("\"error\"")); // Should not have error field

    // Parse it back
    let parsed: JsonRpcResponse = serde_json::from_str(&json).unwrap();
    assert!(parsed.result.is_some());
    assert!(parsed.error.is_none());
}