use bottest::prelude::*;
use reqwest::{Client, StatusCode};
use serde_json::json;
use std::time::Duration;

fn test_client() -> Client {
    Client::builder()
        .timeout(Duration::from_secs(30))
        .build()
        .expect("Failed to create HTTP client")
}

fn external_server_url() -> Option<String> {
    std::env::var("BOTSERVER_URL").ok()
}

async fn get_test_server() -> Option<(Option<TestContext>, String)> {
    if let Some(url) = external_server_url() {
        let client = reqwest::Client::builder()
            .timeout(Duration::from_secs(2))
            .build()
            .ok()?;

        if client.get(&url).send().await.is_ok() {
            return Some((None, url));
        }
    }

    let ctx = TestHarness::quick().await.ok()?;
    let server = ctx.start_botserver().await.ok()?;

    if server.is_running() {
        Some((Some(ctx), server.url.clone()))
    } else {
        None
    }
}

fn is_server_available_sync() -> bool {
    if std::env::var("SKIP_INTEGRATION_TESTS").is_ok() {
        return false;
    }

    if let Some(url) = external_server_url() {
        let client = reqwest::blocking::Client::builder()
            .timeout(Duration::from_secs(2))
            .build()
            .ok();

        if let Some(client) = client {
            return client.get(&url).send().is_ok();
        }
    }

    false
}

macro_rules! skip_if_no_server {
    ($base_url:expr) => {
        if $base_url.is_none() {
            eprintln!("Skipping API test: no server available");
            return;
        }
    };
}

#[tokio::test]
async fn test_health_endpoint() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/health", base_url);

    let response = client.get(&url).send().await;

    match response {
        Ok(resp) => {
            assert!(
                resp.status().is_success(),
                "Health endpoint should return success status"
            );
        }
        Err(e) => {
            eprintln!("Health check failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_ready_endpoint() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/ready", base_url);

    let response = client.get(&url).send().await;

    match response {
        Ok(resp) => {
            assert!(
                resp.status() == StatusCode::OK || resp.status() == StatusCode::SERVICE_UNAVAILABLE,
                "Ready endpoint should return 200 or 503"
            );
        }
        Err(e) => {
            eprintln!("Ready check failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_version_endpoint() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/version", base_url);

    let response = client.get(&url).send().await;

    match response {
        Ok(resp) => {
            if resp.status().is_success() {
                let body = resp.text().await.unwrap_or_default();
                assert!(!body.is_empty(), "Version should return non-empty body");
            }
        }
        Err(e) => {
            eprintln!("Version check failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_login_missing_credentials() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/api/auth/login", base_url);

    let response = client.post(&url).json(&json!({})).send().await;

    match response {
        Ok(resp) => {
            assert!(
                resp.status() == StatusCode::BAD_REQUEST
                    || resp.status() == StatusCode::UNPROCESSABLE_ENTITY,
                "Missing credentials should return 400 or 422"
            );
        }
        Err(e) => {
            eprintln!("Login test failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_login_invalid_credentials() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/api/auth/login", base_url);

    let response = client
        .post(&url)
        .json(&json!({
            "email": "invalid@example.com",
            "password": "wrongpassword"
        }))
        .send()
        .await;

    match response {
        Ok(resp) => {
            assert!(
                resp.status() == StatusCode::UNAUTHORIZED
                    || resp.status() == StatusCode::FORBIDDEN
                    || resp.status() == StatusCode::NOT_FOUND,
                "Invalid credentials should return 401, 403, or 404"
            );
        }
        Err(e) => {
            eprintln!("Login test failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_protected_endpoint_without_auth() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/api/bots", base_url);

    let response = client.get(&url).send().await;

    match response {
        Ok(resp) => {
            assert!(
                resp.status() == StatusCode::UNAUTHORIZED || resp.status() == StatusCode::FORBIDDEN,
                "Protected endpoint without auth should return 401 or 403"
            );
        }
        Err(e) => {
            eprintln!("Auth test failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_list_bots_unauthorized() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/api/bots", base_url);

    let response = client.get(&url).send().await;

    match response {
        Ok(resp) => {
            assert!(
                resp.status() == StatusCode::UNAUTHORIZED || resp.status() == StatusCode::FORBIDDEN,
                "List bots without auth should return 401 or 403"
            );
        }
        Err(e) => {
            eprintln!("Bots test failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_get_nonexistent_bot() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let fake_id = Uuid::new_v4();
    let url = format!("{}/api/bots/{}", base_url, fake_id);

    let response = client.get(&url).send().await;

    match response {
        Ok(resp) => {
            assert!(
                resp.status() == StatusCode::NOT_FOUND
                    || resp.status() == StatusCode::UNAUTHORIZED
                    || resp.status() == StatusCode::FORBIDDEN,
                "Nonexistent bot should return 404, 401, or 403"
            );
        }
        Err(e) => {
            eprintln!("Bot test failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_send_message_missing_body() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/api/chat/send", base_url);

    let response = client
        .post(&url)
        .header("Content-Type", "application/json")
        .body("{}")
        .send()
        .await;

    match response {
        Ok(resp) => {
            assert!(
                resp.status().is_client_error(),
                "Missing body should return client error"
            );
        }
        Err(e) => {
            eprintln!("Message test failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_send_message_invalid_bot() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/api/chat/send", base_url);

    let response = client
        .post(&url)
        .json(&json!({
            "bot_id": Uuid::new_v4().to_string(),
            "message": "Hello",
            "session_id": Uuid::new_v4().to_string()
        }))
        .send()
        .await;

    match response {
        Ok(resp) => {
            assert!(
                resp.status().is_client_error(),
                "Invalid bot should return client error"
            );
        }
        Err(e) => {
            eprintln!("Message test failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_whatsapp_webhook_verification() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!(
        "{}/webhook/whatsapp?hub.mode=subscribe&hub.verify_token=test&hub.challenge=test123",
        base_url
    );

    let response = client.get(&url).send().await;

    match response {
        Ok(resp) => {
            let status = resp.status();
            assert!(
                status == StatusCode::OK
                    || status == StatusCode::FORBIDDEN
                    || status == StatusCode::NOT_FOUND,
                "Webhook verification should return 200, 403, or 404"
            );
        }
        Err(e) => {
            eprintln!("Webhook test failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_whatsapp_webhook_invalid_payload() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/webhook/whatsapp", base_url);

    let response = client
        .post(&url)
        .json(&json!({"invalid": "payload"}))
        .send()
        .await;

    match response {
        Ok(resp) => {
            assert!(
                resp.status().is_client_error() || resp.status().is_success(),
                "Invalid webhook payload should be handled"
            );
        }
        Err(e) => {
            eprintln!("Webhook test failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_json_content_type() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/api/auth/login", base_url);

    let response = client
        .post(&url)
        .header("Content-Type", "text/plain")
        .body("not json")
        .send()
        .await;

    match response {
        Ok(resp) => {
            assert!(
                resp.status() == StatusCode::UNSUPPORTED_MEDIA_TYPE
                    || resp.status() == StatusCode::BAD_REQUEST,
                "Wrong content type should return 415 or 400"
            );
        }
        Err(e) => {
            eprintln!("Content type test failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_404_response() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/nonexistent/path/here", base_url);

    let response = client.get(&url).send().await;

    match response {
        Ok(resp) => {
            assert_eq!(
                resp.status(),
                StatusCode::NOT_FOUND,
                "Unknown path should return 404"
            );
        }
        Err(e) => {
            eprintln!("404 test failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_method_not_allowed() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/health", base_url);

    let response = client.delete(&url).send().await;

    match response {
        Ok(resp) => {
            assert!(
                resp.status() == StatusCode::METHOD_NOT_ALLOWED
                    || resp.status() == StatusCode::NOT_FOUND,
                "Wrong method should return 405 or 404"
            );
        }
        Err(e) => {
            eprintln!("Method test failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_cors_preflight() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/api/bots", base_url);

    let response = client
        .request(reqwest::Method::OPTIONS, &url)
        .header("Origin", "http://localhost:3000")
        .header("Access-Control-Request-Method", "GET")
        .send()
        .await;

    match response {
        Ok(resp) => {
            let status = resp.status();
            assert!(
                status == StatusCode::OK
                    || status == StatusCode::NO_CONTENT
                    || status == StatusCode::NOT_FOUND,
                "CORS preflight should return 200, 204, or 404"
            );
        }
        Err(e) => {
            eprintln!("CORS test failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_rate_limiting_headers() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/health", base_url);

    let response = client.get(&url).send().await;

    match response {
        Ok(resp) => {
            let headers = resp.headers();
            if headers.contains_key("x-ratelimit-limit") {
                assert!(
                    headers.contains_key("x-ratelimit-remaining"),
                    "Rate limit headers should include remaining"
                );
            }
        }
        Err(e) => {
            eprintln!("Rate limit test failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_malformed_json() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/api/auth/login", base_url);

    let response = client
        .post(&url)
        .header("Content-Type", "application/json")
        .body("{malformed json")
        .send()
        .await;

    match response {
        Ok(resp) => {
            assert!(
                resp.status() == StatusCode::BAD_REQUEST
                    || resp.status() == StatusCode::UNPROCESSABLE_ENTITY,
                "Malformed JSON should return 400 or 422"
            );
        }
        Err(e) => {
            eprintln!("Malformed JSON test failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_empty_body_where_required() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/api/auth/login", base_url);

    let response = client
        .post(&url)
        .header("Content-Type", "application/json")
        .send()
        .await;

    match response {
        Ok(resp) => {
            assert!(
                resp.status().is_client_error(),
                "Empty body should return client error"
            );
        }
        Err(e) => {
            eprintln!("Empty body test failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_error_response_format() {
    let server = get_test_server().await;
    skip_if_no_server!(server);

    let (_ctx, base_url) = server.unwrap();
    let client = test_client();
    let url = format!("{}/api/auth/login", base_url);

    let response = client.post(&url).json(&json!({})).send().await;

    match response {
        Ok(resp) => {
            if resp.status().is_client_error() {
                let content_type = resp
                    .headers()
                    .get("content-type")
                    .and_then(|v| v.to_str().ok())
                    .unwrap_or("");

                if content_type.contains("application/json") {
                    let body: Result<serde_json::Value, _> = resp.json().await;
                    if let Ok(json) = body {
                        assert!(
                            json.get("error").is_some() || json.get("message").is_some(),
                            "Error response should have error or message field"
                        );
                    }
                }
            }
        }
        Err(e) => {
            eprintln!("Error format test failed: {}", e);
        }
    }
}

#[tokio::test]
async fn test_with_mock_llm() {
    let ctx = match TestHarness::quick().await {
        Ok(ctx) => ctx,
        Err(e) => {
            eprintln!("Skipping: {}", e);
            return;
        }
    };

    if let Some(mock_llm) = ctx.mock_llm() {
        mock_llm.expect_completion("hello", "Hi there!").await;
        mock_llm.set_default_response("Default response").await;

        let call_count = mock_llm.call_count().await;
        assert_eq!(call_count, 0);
    }
}

#[tokio::test]
async fn test_mock_llm_assertions() {
    let ctx = match TestHarness::quick().await {
        Ok(ctx) => ctx,
        Err(e) => {
            eprintln!("Skipping: {}", e);
            return;
        }
    };

    if let Some(mock_llm) = ctx.mock_llm() {
        mock_llm.assert_not_called().await;

        mock_llm.set_default_response("Test response").await;

        let client = reqwest::Client::new();
        let _ = client
            .post(&format!("{}/v1/chat/completions", mock_llm.url()))
            .json(&serde_json::json!({
                "model": "gpt-4",
                "messages": [{"role": "user", "content": "test"}]
            }))
            .send()
            .await;

        mock_llm.assert_called().await;
    }
}

#[tokio::test]
async fn test_mock_llm_error_simulation() {
    let ctx = match TestHarness::quick().await {
        Ok(ctx) => ctx,
        Err(e) => {
            eprintln!("Skipping: {}", e);
            return;
        }
    };

    if let Some(mock_llm) = ctx.mock_llm() {
        mock_llm.next_call_fails(500, "Internal error").await;

        let client = reqwest::Client::new();
        let response = client
            .post(&format!("{}/v1/chat/completions", mock_llm.url()))
            .json(&serde_json::json!({
                "model": "gpt-4",
                "messages": [{"role": "user", "content": "test"}]
            }))
            .send()
            .await;

        if let Ok(resp) = response {
            assert_eq!(resp.status().as_u16(), 500);
        }
    }
}