/// Integration tests for SAL Virt package
///
/// These tests verify that:
/// - All modules work together correctly
/// - Error types are consistent across modules
/// - Integration between buildah, nerdctl, and rfs works
/// - Module APIs are compatible
use sal_virt::{
    buildah::{BuildahError, Builder},
    nerdctl::{Container, NerdctlError},
    rfs::{MountType, RfsBuilder, RfsError, StoreSpec},
};

/// Tests cross-module error type consistency
///
/// This test verifies that:
/// - All error types implement std::error::Error
/// - Error messages are properly formatted
/// - Error types can be converted to strings
/// - Error handling is consistent across modules
#[test]
fn test_cross_module_error_consistency() {
    // Test BuildahError
    let buildah_error = BuildahError::CommandFailed("Buildah command failed".to_string());
    let buildah_msg = format!("{}", buildah_error);
    assert!(!buildah_msg.is_empty());
    assert!(buildah_msg.contains("Buildah command failed"));

    // Test NerdctlError
    let nerdctl_error = NerdctlError::CommandFailed("Nerdctl command failed".to_string());
    let nerdctl_msg = format!("{}", nerdctl_error);
    assert!(!nerdctl_msg.is_empty());
    assert!(nerdctl_msg.contains("Nerdctl command failed"));

    // Test RfsError
    let rfs_error = RfsError::CommandFailed("RFS command failed".to_string());
    let rfs_msg = format!("{}", rfs_error);
    assert!(!rfs_msg.is_empty());
    assert!(rfs_msg.contains("RFS command failed"));

    // Test that all errors can be used as trait objects
    let errors: Vec<Box<dyn std::error::Error>> = vec![
        Box::new(buildah_error),
        Box::new(nerdctl_error),
        Box::new(rfs_error),
    ];

    for error in errors {
        let error_string = error.to_string();
        assert!(!error_string.is_empty());
    }
}

/// Tests module integration and compatibility
///
/// This test verifies that:
/// - All modules can be used together
/// - Builder patterns are consistent
/// - Error handling works across modules
/// - No conflicts between module APIs
#[test]
fn test_module_integration_compatibility() {
    // Test that all modules can be instantiated together
    let buildah_result = Builder::new("integration-test", "alpine:latest");
    let nerdctl_result = Container::new("integration-test");
    let rfs_builder = RfsBuilder::new("/src", "/dst", MountType::Local);

    // Test RFS builder (should always work)
    assert_eq!(rfs_builder.source(), "/src");
    assert_eq!(rfs_builder.target(), "/dst");
    assert!(matches!(rfs_builder.mount_type(), MountType::Local));

    // Test error handling consistency
    match (buildah_result, nerdctl_result) {
        (Ok(buildah_builder), Ok(nerdctl_container)) => {
            // Both tools available - verify they work together
            assert_eq!(buildah_builder.name(), "integration-test");
            assert_eq!(nerdctl_container.name, "integration-test");
            println!("✓ Both buildah and nerdctl are available");
        }
        (
            Err(BuildahError::CommandExecutionFailed(_)),
            Err(NerdctlError::CommandExecutionFailed(_)),
        ) => {
            // Both tools unavailable - expected in test environment
            println!("⚠️  Both buildah and nerdctl unavailable - test environment detected");
        }
        (Ok(buildah_builder), Err(NerdctlError::CommandExecutionFailed(_))) => {
            // Only buildah available
            assert_eq!(buildah_builder.name(), "integration-test");
            println!("✓ Buildah available, nerdctl unavailable");
        }
        (Err(BuildahError::CommandExecutionFailed(_)), Ok(nerdctl_container)) => {
            // Only nerdctl available
            assert_eq!(nerdctl_container.name, "integration-test");
            println!("✓ Nerdctl available, buildah unavailable");
        }
        (Err(buildah_err), Err(nerdctl_err)) => {
            // Other errors - should be consistent
            println!(
                "⚠️  Both tools failed with errors: buildah={:?}, nerdctl={:?}",
                buildah_err, nerdctl_err
            );
        }
        (Ok(_), Err(nerdctl_err)) => {
            println!("⚠️  Buildah succeeded, nerdctl failed: {:?}", nerdctl_err);
        }
        (Err(buildah_err), Ok(_)) => {
            println!("⚠️  Nerdctl succeeded, buildah failed: {:?}", buildah_err);
        }
    }
}

/// Tests store specification integration with different modules
///
/// This test verifies that:
/// - StoreSpec works with different storage backends
/// - String serialization is consistent
/// - Options are properly handled
/// - Integration with pack operations works
#[test]
fn test_store_spec_integration() {
    // Test different store specifications
    let file_spec = StoreSpec::new("file")
        .with_option("path", "/tmp/storage")
        .with_option("compression", "gzip");

    let s3_spec = StoreSpec::new("s3")
        .with_option("bucket", "my-bucket")
        .with_option("region", "us-east-1")
        .with_option("access_key", "test-key");

    let custom_spec = StoreSpec::new("custom-backend")
        .with_option("endpoint", "https://storage.example.com")
        .with_option("auth", "bearer-token");

    // Test that all specs serialize correctly
    let file_string = file_spec.to_string();
    assert!(file_string.starts_with("file:"));
    assert!(file_string.contains("path=/tmp/storage"));
    assert!(file_string.contains("compression=gzip"));

    let s3_string = s3_spec.to_string();
    assert!(s3_string.starts_with("s3:"));
    assert!(s3_string.contains("bucket=my-bucket"));
    assert!(s3_string.contains("region=us-east-1"));
    assert!(s3_string.contains("access_key=test-key"));

    let custom_string = custom_spec.to_string();
    assert!(custom_string.starts_with("custom-backend:"));
    assert!(custom_string.contains("endpoint=https://storage.example.com"));
    assert!(custom_string.contains("auth=bearer-token"));

    // Test that specs can be used in collections
    let specs = vec![file_spec, s3_spec, custom_spec];
    assert_eq!(specs.len(), 3);

    for spec in &specs {
        assert!(!spec.spec_type.is_empty());
        assert!(!spec.to_string().is_empty());
    }
}

/// Tests mount type integration across different scenarios
///
/// This test verifies that:
/// - Mount types work with different builders
/// - String conversion is bidirectional
/// - Custom mount types preserve data
/// - Integration with RFS operations works
#[test]
fn test_mount_type_integration() {
    let mount_types = vec![
        MountType::Local,
        MountType::SSH,
        MountType::S3,
        MountType::WebDAV,
        MountType::Custom("fuse-overlay".to_string()),
    ];

    for mount_type in mount_types {
        // Test with RFS builder
        let builder = RfsBuilder::new("/test/source", "/test/target", mount_type.clone());

        // Verify mount type is preserved
        match (&mount_type, builder.mount_type()) {
            (MountType::Local, MountType::Local) => {}
            (MountType::SSH, MountType::SSH) => {}
            (MountType::S3, MountType::S3) => {}
            (MountType::WebDAV, MountType::WebDAV) => {}
            (MountType::Custom(expected), MountType::Custom(actual)) => {
                assert_eq!(expected, actual);
            }
            _ => assert!(
                false,
                "Mount type not preserved: expected {:?}, got {:?}",
                mount_type,
                builder.mount_type()
            ),
        }

        // Test string conversion round-trip
        let mount_string = mount_type.to_string();
        let parsed_mount = MountType::from_string(&mount_string);

        // Verify round-trip conversion
        match (&mount_type, &parsed_mount) {
            (MountType::Local, MountType::Local) => {}
            (MountType::SSH, MountType::SSH) => {}
            (MountType::S3, MountType::S3) => {}
            (MountType::WebDAV, MountType::WebDAV) => {}
            (MountType::Custom(orig), MountType::Custom(parsed)) => {
                assert_eq!(orig, parsed);
            }
            _ => {
                // For custom types, from_string might return Custom variant
                if let MountType::Custom(_) = mount_type {
                    assert!(matches!(parsed_mount, MountType::Custom(_)));
                } else {
                    assert!(
                        false,
                        "Round-trip conversion failed: {:?} -> {} -> {:?}",
                        mount_type, mount_string, parsed_mount
                    );
                }
            }
        }
    }
}

/// Tests Rhai integration and function registration
///
/// This test verifies that:
/// - Rhai module registration works correctly
/// - All expected functions are available
/// - Function signatures are correct
/// - No registration conflicts occur
#[test]
fn test_rhai_integration_and_registration() {
    use rhai::Engine;

    // Create a new Rhai engine
    let mut engine = Engine::new();

    // Test that we can register virt functions
    // Note: We test the registration process, not the actual function execution
    let registration_result = sal_virt::rhai::register_virt_module(&mut engine);
    assert!(
        registration_result.is_ok(),
        "Rhai function registration should succeed"
    );

    // Test that expected function categories are available
    let expected_function_prefixes = vec![
        "bah_",     // Buildah functions
        "nerdctl_", // Nerdctl functions
        "rfs_",     // RFS functions
    ];

    // Test compilation of scripts that reference these functions
    for prefix in expected_function_prefixes {
        let test_script = format!("fn test_{}() {{ return type_of({}new); }}", prefix, prefix);

        // Try to compile the script - this tests function availability
        let compile_result = engine.compile(&test_script);

        // We expect this to either succeed (function exists) or fail with a specific error
        match compile_result {
            Ok(_) => {
                println!("✓ Function family '{}' is available", prefix);
            }
            Err(e) => {
                // Check if it's a "function not found" error vs other compilation errors
                let error_msg = e.to_string();
                if error_msg.contains("not found") || error_msg.contains("unknown") {
                    println!("⚠️  Function family '{}' not found: {}", prefix, error_msg);
                } else {
                    println!("⚠️  Compilation error for '{}': {}", prefix, error_msg);
                }
            }
        }
    }
}

/// Tests Rhai script compilation and basic syntax
///
/// This test verifies that:
/// - Basic Rhai scripts compile correctly
/// - Virt module functions can be referenced
/// - No syntax conflicts exist
/// - Error handling works in Rhai context
#[test]
fn test_rhai_script_compilation() {
    use rhai::Engine;

    let mut engine = Engine::new();

    // Register virt functions
    let _ = sal_virt::rhai::register_virt_module(&mut engine);

    // Test basic script compilation
    let basic_scripts = vec![
        "let x = 42; x + 1",
        "fn test() { return true; } test()",
        "let result = \"hello world\"; result.len()",
    ];

    for script in basic_scripts {
        let compile_result = engine.compile(script);
        assert!(
            compile_result.is_ok(),
            "Basic script should compile: {}",
            script
        );
    }

    // Test scripts that reference virt functions (compilation only)
    let virt_scripts = vec![
        "fn test_buildah() { return type_of(bah_new); }",
        "fn test_nerdctl() { return type_of(nerdctl_run); }",
        "fn test_rfs() { return type_of(rfs_mount); }",
    ];

    for script in virt_scripts {
        let compile_result = engine.compile(script);

        // We don't require these to succeed (functions might not be registered)
        // but we test that compilation doesn't crash
        match compile_result {
            Ok(_) => println!("✓ Virt script compiled successfully: {}", script),
            Err(e) => println!(
                "⚠️  Virt script compilation failed (expected): {} - {}",
                script, e
            ),
        }
    }
}