//! Complete E2E test for General Bots platform flow
//!
//! Tests the full user journey:
//! 1. Platform loading (UI assets)
//! 2. BotServer initialization
//! 3. User login
//! 4. Chat interaction
//! 5. User logout

use bottest::prelude::*;
use bottest::web::{Browser, BrowserConfig};
use std::time::Duration;

use super::{browser_config, check_webdriver_available, should_run_e2e_tests, E2ETestContext};

/// Step 1: Verify platform loads
/// - Check UI is served
/// - Verify health endpoint responds
/// - Confirm database migrations completed
pub async fn verify_platform_loading(ctx: &E2ETestContext) -> anyhow::Result<()> {
    let client = reqwest::Client::new();

    // Check health endpoint
    let health_url = format!("{}/health", ctx.base_url());
    let health_resp = client.get(&health_url).send().await?;
    assert!(
        health_resp.status().is_success(),
        "Health check failed with status: {}",
        health_resp.status()
    );

    println!("✓ Platform health check passed");

    // Verify API is responsive
    let api_url = format!("{}/api/v1", ctx.base_url());
    let api_resp = client.get(&api_url).send().await?;
    assert!(
        api_resp.status().is_success() || api_resp.status().as_u16() == 401,
        "API endpoint failed with status: {}",
        api_resp.status()
    );

    println!("✓ Platform API responsive");

    Ok(())
}

/// Step 2: Verify BotServer is running and initialized
/// - Check service discovery
/// - Verify configuration loaded
/// - Confirm database connection
pub async fn verify_botserver_running(ctx: &E2ETestContext) -> anyhow::Result<()> {
    let client = reqwest::Client::new();

    // Check if server is actually running
    assert!(ctx.server.is_running(), "BotServer process is not running");

    println!("✓ BotServer process running");

    // Verify server info endpoint
    let info_url = format!("{}/api/v1/server/info", ctx.base_url());
    match client.get(&info_url).send().await {
        Ok(resp) => {
            if resp.status().is_success() {
                let body = resp.text().await?;
                assert!(!body.is_empty(), "Server info response is empty");
                println!(
                    "✓ BotServer initialized with info: {}",
                    body.chars().take(100).collect::<String>()
                );
            } else {
                println!(
                    "⚠ Server info endpoint returned {}, continuing anyway",
                    resp.status()
                );
            }
        }
        Err(e) => {
            println!(
                "⚠ Could not reach server info endpoint: {}, continuing anyway",
                e
            );
        }
    }

    println!("✓ BotServer is running and initialized");

    Ok(())
}

/// Step 3: User login flow
/// - Navigate to login page
/// - Enter test credentials
/// - Verify session created
/// - Confirm redirect to dashboard
pub async fn test_user_login(browser: &Browser, ctx: &E2ETestContext) -> anyhow::Result<()> {
    let login_url = format!("{}/login", ctx.base_url());

    // Navigate to login page
    browser.navigate(&login_url).await?;
    println!("✓ Navigated to login page: {}", login_url);

    // Wait for login form to be visible
    let timeout = Duration::from_secs(10);
    browser
        .wait_for_element("input[type='email']", timeout)
        .await?;
    println!("✓ Login form loaded");

    // Fill in test credentials
    let test_email = "test@example.com";
    let test_password = "TestPassword123!";

    browser
        .fill_input("input[type='email']", test_email)
        .await?;
    println!("✓ Entered email: {}", test_email);

    browser
        .fill_input("input[type='password']", test_password)
        .await?;
    println!("✓ Entered password");

    // Submit login form
    let submit_timeout = Duration::from_secs(5);
    browser
        .click("button[type='submit']", submit_timeout)
        .await?;
    println!("✓ Clicked login button");

    // Wait for redirect or dashboard
    let redirect_timeout = Duration::from_secs(15);
    let current_url = browser.get_current_url(redirect_timeout).await?;

    // Check we're not on login page anymore
    assert!(
        !current_url.contains("/login"),
        "Still on login page after login attempt. URL: {}",
        current_url
    );

    println!("✓ Redirected from login page to: {}", current_url);

    // Verify we can see dashboard or chat area
    browser
        .wait_for_element(
            "[data-testid='chat-area'], [data-testid='dashboard'], main",
            Duration::from_secs(10),
        )
        .await?;
    println!("✓ Dashboard or chat area visible");

    Ok(())
}

/// Step 4: Chat interaction
/// - Open chat window
/// - Send test message
/// - Receive bot response
/// - Verify message persisted
pub async fn test_chat_interaction(browser: &Browser, ctx: &E2ETestContext) -> anyhow::Result<()> {
    // Ensure we're on chat page
    let chat_url = format!("{}/chat", ctx.base_url());
    browser.navigate(&chat_url).await?;
    println!("✓ Navigated to chat page");

    // Wait for chat interface to load
    browser
        .wait_for_element(
            "[data-testid='message-input'], textarea.chat-input, input.message",
            Duration::from_secs(10),
        )
        .await?;
    println!("✓ Chat interface loaded");

    // Send test message
    let test_message = "Hello, I need help";
    browser
        .fill_input("textarea.chat-input, input.message", test_message)
        .await?;
    println!("✓ Typed message: {}", test_message);

    // Click send button or press Enter
    let send_result = browser
        .click(
            "button[data-testid='send-button'], button.send-btn",
            Duration::from_secs(5),
        )
        .await;

    if send_result.is_err() {
        // Try pressing Enter as alternative
        browser.press_key("Enter").await?;
        println!("✓ Sent message with Enter key");
    } else {
        println!("✓ Clicked send button");
    }

    // Wait for message to appear in chat history
    browser
        .wait_for_element(
            "[data-testid='message-item'], .message-bubble, [class*='message']",
            Duration::from_secs(10),
        )
        .await?;
    println!("✓ Message appeared in chat");

    // Wait for bot response
    let response_timeout = Duration::from_secs(30);
    browser
        .wait_for_element(
            "[data-testid='bot-response'], .bot-message, [class*='bot']",
            response_timeout,
        )
        .await?;
    println!("✓ Received bot response");

    // Get response text
    let response_text = browser
        .get_text("[data-testid='bot-response'], .bot-message, [class*='bot']")
        .await
        .ok();

    if let Some(text) = response_text {
        println!(
            "✓ Bot response: {}",
            text.chars().take(100).collect::<String>()
        );
    }

    Ok(())
}

/// Step 5: User logout flow
/// - Click logout button
/// - Verify session invalidated
/// - Confirm redirect to login
/// - Verify cannot access protected routes
pub async fn test_user_logout(browser: &Browser, ctx: &E2ETestContext) -> anyhow::Result<()> {
    // Find and click logout button
    let logout_selectors = vec![
        "button[data-testid='logout-btn']",
        "button.logout",
        "[data-testid='user-menu'] button[data-testid='logout']",
        "a[href*='logout']",
    ];

    let mut logout_found = false;
    for selector in logout_selectors {
        if let Ok(_) = browser.click(selector, Duration::from_secs(3)).await {
            println!("✓ Clicked logout button: {}", selector);
            logout_found = true;
            break;
        }
    }

    if !logout_found {
        println!("⚠ Could not find logout button, attempting with keyboard shortcut");
        browser.press_key("l").await.ok(); // Some apps use 'l' for logout
    }

    // Wait for redirect to login
    let redirect_timeout = Duration::from_secs(10);
    let current_url = browser.get_current_url(redirect_timeout).await?;

    assert!(
        current_url.contains("/login") || current_url.contains("/auth"),
        "Not redirected to login page after logout. URL: {}",
        current_url
    );

    println!("✓ Redirected to login page after logout: {}", current_url);

    // Verify we cannot access protected routes
    let chat_url = format!("{}/chat", ctx.base_url());
    browser.navigate(&chat_url).await?;

    let check_url = browser.get_current_url(Duration::from_secs(5)).await?;
    assert!(
        check_url.contains("/login") || check_url.contains("/auth"),
        "Should be redirected to login when accessing protected route after logout. URL: {}",
        check_url
    );

    println!("✓ Protected routes properly redirect to login");

    Ok(())
}

/// Complete platform flow test
///
/// This test validates the entire user journey:
/// 1. Platform loads successfully
/// 2. BotServer is initialized and running
/// 3. User can login with credentials
/// 4. User can interact with chat
/// 5. User can logout and lose access
#[tokio::test]
async fn test_complete_platform_flow_login_chat_logout() {
    if !should_run_e2e_tests() {
        eprintln!("Skipping: E2E tests disabled (set SKIP_E2E_TESTS env var to disable)");
        return;
    }

    if !check_webdriver_available().await {
        eprintln!("Skipping: WebDriver not available at configured URL");
        return;
    }

    println!("\n=== Starting Complete Platform Flow Test ===\n");

    // Setup context
    let ctx = match E2ETestContext::setup_with_browser().await {
        Ok(ctx) => ctx,
        Err(e) => {
            eprintln!("Failed to setup E2E context: {}", e);
            return;
        }
    };

    if !ctx.has_browser() {
        eprintln!("Browser not available");
        return;
    }

    let browser = ctx.browser.as_ref().unwrap();

    // Test each phase
    println!("\n--- Phase 1: Platform Loading ---");
    if let Err(e) = verify_platform_loading(&ctx).await {
        eprintln!("Platform loading test failed: {}", e);
        return;
    }

    println!("\n--- Phase 2: BotServer Initialization ---");
    if let Err(e) = verify_botserver_running(&ctx).await {
        eprintln!("BotServer initialization test failed: {}", e);
        return;
    }

    println!("\n--- Phase 3: User Login ---");
    if let Err(e) = test_user_login(browser, &ctx).await {
        eprintln!("Login test failed: {}", e);
        return;
    }

    println!("\n--- Phase 4: Chat Interaction ---");
    if let Err(e) = test_chat_interaction(browser, &ctx).await {
        eprintln!("Chat interaction test failed: {}", e);
        // Don't return here - try to logout anyway
    }

    println!("\n--- Phase 5: User Logout ---");
    if let Err(e) = test_user_logout(browser, &ctx).await {
        eprintln!("Logout test failed: {}", e);
        return;
    }

    println!("\n=== Complete Platform Flow Test PASSED ===\n");

    ctx.close().await;
}

/// Simpler test for basic platform loading without browser
#[tokio::test]
async fn test_platform_loading_http_only() {
    if !should_run_e2e_tests() {
        eprintln!("Skipping: E2E tests disabled");
        return;
    }

    println!("\n=== Testing Platform Loading (HTTP Only) ===\n");

    let ctx = match E2ETestContext::setup().await {
        Ok(ctx) => ctx,
        Err(e) => {
            eprintln!("Failed to setup context: {}", e);
            return;
        }
    };

    if let Err(e) = verify_platform_loading(&ctx).await {
        eprintln!("Platform loading failed: {}", e);
        return;
    }

    println!("\n✓ Platform Loading Test PASSED\n");

    ctx.close().await;
}

/// Test BotServer startup and health
#[tokio::test]
async fn test_botserver_startup() {
    if !should_run_e2e_tests() {
        eprintln!("Skipping: E2E tests disabled");
        return;
    }

    println!("\n=== Testing BotServer Startup ===\n");

    let ctx = match E2ETestContext::setup().await {
        Ok(ctx) => ctx,
        Err(e) => {
            eprintln!("Failed to setup context: {}", e);
            return;
        }
    };

    if let Err(e) = verify_botserver_running(&ctx).await {
        eprintln!("BotServer test failed: {}", e);
        return;
    }

    println!("\n✓ BotServer Startup Test PASSED\n");

    ctx.close().await;
}