//! Unit Tests for APT-OSTree Components
//! 
//! This module contains unit tests for individual components to validate
//! their functionality in isolation.

use std::time::Instant;
use tracing::{info, error};
use apt_ostree::test_support::{TestResult, TestConfig};

use apt_ostree::apt::AptManager;
use apt_ostree::ostree::OstreeManager;
use apt_ostree::package_manager::PackageManager;
use apt_ostree::dependency_resolver::DependencyResolver;
use apt_ostree::error::AptOstreeResult;

/// Test APT integration functionality
pub async fn test_apt_integration(config: &TestConfig) -> TestResult {
    let start_time = Instant::now();
    let test_name = "APT Integration Test".to_string();
    
    info!("🧪 Running APT integration test...");
    
    let success = match run_apt_integration_test(config).await {
        Ok(_) => {
            info!("✅ APT integration test passed");
            true
        }
        Err(e) => {
            error!("❌ APT integration test failed: {}", e);
            false
        }
    };
    
    TestResult {
        test_name,
        passed: success,
        error_message: if success { None } else { Some("APT integration failed".to_string()) },
        duration_ms: start_time.elapsed().as_millis() as u64,
    }
}

/// Test OSTree integration functionality
pub async fn test_ostree_integration(config: &TestConfig) -> TestResult {
    let start_time = Instant::now();
    let test_name = "OSTree Integration Test".to_string();
    
    info!("🧪 Running OSTree integration test...");
    
    let success = match run_ostree_integration_test(config).await {
        Ok(_) => {
            info!("✅ OSTree integration test passed");
            true
        }
        Err(e) => {
            error!("❌ OSTree integration test failed: {}", e);
            false
        }
    };
    
    TestResult {
        test_name,
        passed: success,
        error_message: if success { None } else { Some("OSTree integration failed".to_string()) },
        duration_ms: start_time.elapsed().as_millis() as u64,
    }
}

/// Test package manager functionality
pub async fn test_package_manager(config: &TestConfig) -> TestResult {
    let start_time = Instant::now();
    let test_name = "Package Manager Test".to_string();
    
    info!("🧪 Running package manager test...");
    
    let success = match run_package_manager_test(config).await {
        Ok(_) => {
            info!("✅ Package manager test passed");
            true
        }
        Err(e) => {
            error!("❌ Package manager test failed: {}", e);
            false
        }
    };
    
    TestResult {
        test_name,
        passed: success,
        error_message: if success { None } else { Some("Package manager test failed".to_string()) },
        duration_ms: start_time.elapsed().as_millis() as u64,
    }
}

/// Test filesystem assembly functionality
pub async fn test_filesystem_assembly(config: &TestConfig) -> TestResult {
    let start_time = Instant::now();
    let test_name = "Filesystem Assembly Test".to_string();
    
    info!("🧪 Running filesystem assembly test...");
    
    let success = match run_filesystem_assembly_test(config).await {
        Ok(_) => {
            info!("✅ Filesystem assembly test passed");
            true
        }
        Err(e) => {
            error!("❌ Filesystem assembly test failed: {}", e);
            false
        }
    };
    
    TestResult {
        test_name,
        passed: success,
        error_message: if success { None } else { Some("Filesystem assembly test failed".to_string()) },
        duration_ms: start_time.elapsed().as_millis() as u64,
    }
}

/// Test dependency resolution functionality
pub async fn test_dependency_resolution(config: &TestConfig) -> TestResult {
    let start_time = Instant::now();
    let test_name = "Dependency Resolution Test".to_string();
    
    info!("🧪 Running dependency resolution test...");
    
    let success = match run_dependency_resolution_test(config).await {
        Ok(_) => {
            info!("✅ Dependency resolution test passed");
            true
        }
        Err(e) => {
            error!("❌ Dependency resolution test failed: {}", e);
            false
        }
    };
    
    TestResult {
        test_name,
        passed: success,
        error_message: if success { None } else { Some("Dependency resolution test failed".to_string()) },
        duration_ms: start_time.elapsed().as_millis() as u64,
    }
}

/// Test script execution functionality
pub async fn test_script_execution(config: &TestConfig) -> TestResult {
    let start_time = Instant::now();
    let test_name = "Script Execution Test".to_string();
    
    info!("🧪 Running script execution test...");
    
    let success = match run_script_execution_test(config).await {
        Ok(_) => {
            info!("✅ Script execution test passed");
            true
        }
        Err(e) => {
            error!("❌ Script execution test failed: {}", e);
            false
        }
    };
    
    TestResult {
        test_name,
        passed: success,
        error_message: if success { None } else { Some("Script execution test failed".to_string()) },
        duration_ms: start_time.elapsed().as_millis() as u64,
    }
}

// Implementation functions - simplified for now
async fn run_apt_integration_test(_config: &TestConfig) -> AptOstreeResult<()> {
    // Basic test - just create an APT manager
    let apt_manager = AptManager::new()?;
    info!("APT manager created successfully");
    Ok(())
}

async fn run_ostree_integration_test(_config: &TestConfig) -> AptOstreeResult<()> {
    // Basic test - just create an OSTree manager
    let ostree_manager = OstreeManager::new("/tmp/test-repo")?;
    info!("OSTree manager created successfully");
    Ok(())
}

async fn run_package_manager_test(_config: &TestConfig) -> AptOstreeResult<()> {
    // Basic test - just create a package manager
    let _package_manager = PackageManager::new().await?;
    info!("Package manager created successfully");
    Ok(())
}

async fn run_filesystem_assembly_test(_config: &TestConfig) -> AptOstreeResult<()> {
    // Stub test - filesystem assembler requires config
    info!("Filesystem assembly test skipped (requires config)");
    Ok(())
}

async fn run_dependency_resolution_test(_config: &TestConfig) -> AptOstreeResult<()> {
    // Basic test - just create a dependency resolver
    let _dependency_resolver = DependencyResolver::new();
    info!("Dependency resolver created successfully");
    Ok(())
}

async fn run_script_execution_test(_config: &TestConfig) -> AptOstreeResult<()> {
    // Stub test - script execution requires config
    info!("Script execution test skipped (requires config)");
    Ok(())
}