// Integration tests for polyfill-rs
// These tests hit the real Polymarket API and are ignored by default
// Run with: cargo test --test integration_tests -- --ignored --test-threads=1

use polyfill_rs::{ClientConfig, ClobClient, OrderArgs, Side};
use rust_decimal_macros::dec;
use std::env;

const HOST: &str = "https://clob.polymarket.com";
const CHAIN_ID: u64 = 137;

fn load_env_vars() -> (String, Option<String>, Option<String>, Option<String>) {
    dotenvy::dotenv().ok();

    let private_key =
        env::var("POLYMARKET_PRIVATE_KEY").expect("POLYMARKET_PRIVATE_KEY must be set in .env");
    let api_key = env::var("POLYMARKET_API_KEY").ok();
    let api_secret = env::var("POLYMARKET_API_SECRET")
        .or_else(|_| env::var("POLYMARKET_SECRET"))
        .ok();
    let api_passphrase = env::var("POLYMARKET_API_PASSPHRASE")
        .or_else(|_| env::var("POLYMARKET_PASSPHRASE"))
        .ok();

    (private_key, api_key, api_secret, api_passphrase)
}

fn env_signature_type() -> Option<u8> {
    env::var("POLYMARKET_SIGNATURE_TYPE")
        .ok()
        .and_then(|value| value.parse::<u8>().ok())
}

fn env_funder() -> Option<String> {
    env::var("POLYMARKET_FUNDER")
        .or_else(|_| env::var("POLYMARKET_FUNDER_ADDRESS"))
        .ok()
}

fn bootstrap_client(private_key: &str) -> ClobClient {
    ClobClient::from_config(ClientConfig {
        base_url: HOST.to_string(),
        chain: CHAIN_ID,
        private_key: Some(private_key.to_string()),
        signature_type: env_signature_type(),
        funder: env_funder(),
        ..ClientConfig::default()
    })
    .expect("failed to build bootstrap client")
}

fn authenticated_client(
    private_key: String,
    api_credentials: polyfill_rs::ApiCredentials,
) -> ClobClient {
    ClobClient::from_config(ClientConfig {
        base_url: HOST.to_string(),
        chain: CHAIN_ID,
        private_key: Some(private_key),
        api_credentials: Some(api_credentials),
        signature_type: env_signature_type(),
        funder: env_funder(),
        ..ClientConfig::default()
    })
    .expect("failed to build authenticated client")
}

#[tokio::test(flavor = "multi_thread")]
#[ignore]
async fn test_real_api_create_derive_api_key() {
    let (private_key, _, _, _) = load_env_vars();

    let client = bootstrap_client(&private_key);

    // Test creating/deriving API key
    let result = client.create_or_derive_api_key(None).await;
    assert!(
        result.is_ok(),
        "Failed to create/derive API key: {:?}",
        result
    );

    let api_creds = result.unwrap();
    assert!(!api_creds.api_key.is_empty());
    assert!(!api_creds.secret.is_empty());
    assert!(!api_creds.passphrase.is_empty());

    println!("PASS: Successfully created/derived API key");
}

#[tokio::test(flavor = "multi_thread")]
#[ignore]
async fn test_real_api_authenticated_order_flow() {
    let (private_key, _, _, _) = load_env_vars();

    // Initialize client with L1 headers
    let bootstrap = bootstrap_client(&private_key);

    // Step 1: Create/derive API credentials
    println!("Step 1: Creating/deriving API credentials...");
    let api_creds = bootstrap
        .create_or_derive_api_key(None)
        .await
        .expect("Failed to create/derive API key");
    let client = authenticated_client(private_key, api_creds);
    println!("PASS: API credentials set");

    // Step 2: Get a valid token_id from active markets
    println!("Step 2: Fetching active markets...");
    let markets = client
        .get_sampling_markets(None)
        .await
        .expect("Failed to get markets");

    let mut selected_token = None;
    let mut selected_midpoint = None;
    for market in markets.data.iter().filter(|m| m.active && !m.closed) {
        for token in &market.tokens {
            let midpoint = match client.get_midpoint(&token.token_id).await {
                Ok(midpoint) => midpoint.mid,
                Err(_) => continue,
            };
            if midpoint > dec!(0.05) {
                selected_token = Some(token.token_id.clone());
                selected_midpoint = Some(midpoint);
                break;
            }
        }
        if selected_token.is_some() {
            break;
        }
    }

    let token_id = selected_token.expect("No active token with midpoint safely above 0.01 found");
    let midpoint = selected_midpoint.expect("midpoint should be selected with token");
    println!("PASS: Found active token: {}", token_id);
    println!("PASS: Current midpoint: {}", midpoint);

    // Step 4: Create and post a tiny non-marketable BUY order.
    // A BUY at 0.01 validates pUSD balance/allowance without requiring outcome-token inventory.
    let side = Side::BUY;
    let order_price = dec!(0.01);
    let order_book = client
        .get_order_book(&token_id)
        .await
        .expect("Failed to get selected order book");
    let order_size = order_book.min_order_size.max(dec!(5));

    println!(
        "Step 4: Posting {:?} order at price {} and size {}...",
        side, order_price, order_size
    );
    let order_args = OrderArgs {
        token_id,
        price: order_price,
        size: order_size,
        side,
        expiration: None,
        builder_code: None,
        metadata: None,
    };

    let post_result = client.create_and_post_order(&order_args, None, None).await;

    // This is the critical test - did we get past the 401 error?
    match &post_result {
        Ok(response) => {
            println!("PASS: Order posted successfully!");

            // Step 5: Cancel the order
            if !response.order_id.is_empty() {
                println!("Step 5: Canceling order {}...", response.order_id);
                let cancel_result = client.cancel(&response.order_id).await;
                assert!(
                    cancel_result.is_ok(),
                    "Failed to cancel order: {:?}",
                    cancel_result
                );
                println!("PASS: Order canceled successfully");
            } else {
                println!(
                    "WARNING: Order posted but no orderID in response: {:?}",
                    response
                );
            }
        },
        Err(e) => {
            // The critical failure: did we get a 401 (authentication failure)?
            match &e {
                polyfill_rs::PolyfillError::Api { status: 401, .. } => {
                    panic!(
                        "FAIL: CRITICAL: 401 Unauthorized error - HMAC authentication is broken!"
                    );
                },
                // Any 4xx other than 401 indicates auth succeeded and we reached server-side validation.
                polyfill_rs::PolyfillError::Api {
                    status: 400..=499, ..
                } => {
                    println!("PASS: Authentication successful (got expected validation error)");
                    println!("  Error: {:?}", e);
                },
                _ => {
                    panic!("FAIL: Unexpected error: {:?}", e);
                },
            }
        },
    }
}

#[tokio::test(flavor = "multi_thread")]
#[ignore]
async fn test_real_api_get_orders() {
    let (private_key, _, _, _) = load_env_vars();

    let bootstrap = bootstrap_client(&private_key);
    let api_creds = bootstrap
        .create_or_derive_api_key(None)
        .await
        .expect("Failed to create/derive API key");
    let client = authenticated_client(private_key, api_creds);

    println!("Testing get_orders...");
    let result = client.get_orders(None, None).await;

    match result {
        Ok(orders) => {
            println!("PASS: Successfully fetched orders");
            println!("  Found {} orders", orders.len());
        },
        Err(e) => {
            let err_str = format!("{:?}", e);
            if err_str.contains("401") {
                panic!("FAIL: 401 Unauthorized - authentication failed!");
            }
            panic!("Failed to get orders: {:?}", e);
        },
    }
}

#[tokio::test(flavor = "multi_thread")]
#[ignore]
async fn test_real_api_get_trades() {
    let (private_key, _, _, _) = load_env_vars();

    let bootstrap = bootstrap_client(&private_key);
    let api_creds = bootstrap
        .create_or_derive_api_key(None)
        .await
        .expect("Failed to create/derive API key");
    let client = authenticated_client(private_key, api_creds);

    println!("Testing get_trades...");
    let result = client.get_trades(None, None).await;

    match result {
        Ok(_trades) => {
            println!("PASS: Successfully fetched trades");
        },
        Err(e) => {
            let err_str = format!("{:?}", e);
            if err_str.contains("401") {
                panic!("FAIL: 401 Unauthorized - authentication failed!");
            }
            panic!("Failed to get trades: {:?}", e);
        },
    }
}

#[tokio::test(flavor = "multi_thread")]
#[ignore]
async fn test_real_api_get_balance_allowance() {
    let (private_key, _, _, _) = load_env_vars();

    let bootstrap = bootstrap_client(&private_key);
    let api_creds = bootstrap
        .create_or_derive_api_key(None)
        .await
        .expect("Failed to create/derive API key");
    let client = authenticated_client(private_key, api_creds);

    println!("Testing get_balance_allowance...");

    use polyfill_rs::types::{AssetType, BalanceAllowanceParams};
    let collateral_update_params = BalanceAllowanceParams {
        asset_type: Some(AssetType::COLLATERAL),
        token_id: None,
        signature_type: None,
    };
    let collateral_update = client
        .update_balance_allowance(Some(collateral_update_params))
        .await;
    match collateral_update {
        Ok(update) => {
            println!("PASS: Successfully requested collateral balance/allowance update");
            println!("  Collateral update: {:?}", update);
        },
        Err(e) => {
            let err_str = format!("{:?}", e);
            if err_str.contains("401") {
                panic!("FAIL: 401 Unauthorized - authentication failed!");
            }
            println!("WARNING: Collateral balance update failed: {:?}", e);
        },
    }

    let collateral_params = BalanceAllowanceParams {
        asset_type: Some(AssetType::COLLATERAL),
        token_id: None,
        signature_type: None,
    };
    let collateral_result = client.get_balance_allowance(Some(collateral_params)).await;

    match collateral_result {
        Ok(balance) => {
            println!("PASS: Successfully fetched collateral balance/allowance");
            println!("  Collateral: {:?}", balance);
        },
        Err(e) => {
            let err_str = format!("{:?}", e);
            if err_str.contains("401") {
                panic!("FAIL: 401 Unauthorized - authentication failed!");
            }
            println!("WARNING: Collateral balance check failed: {:?}", e);
        },
    }

    // Get a valid token_id first
    let markets = client
        .get_sampling_markets(None)
        .await
        .expect("Failed to get markets");
    let token_id = &markets.data[0].tokens[0].token_id;

    let params = BalanceAllowanceParams {
        asset_type: Some(AssetType::CONDITIONAL),
        token_id: Some(token_id.clone()),
        signature_type: None,
    };

    let result = client.get_balance_allowance(Some(params)).await;

    match result {
        Ok(balance) => {
            println!("PASS: Successfully fetched balance/allowance");
            println!("  Balance: {:?}", balance);
        },
        Err(e) => {
            let err_str = format!("{:?}", e);
            if err_str.contains("401") {
                panic!("FAIL: 401 Unauthorized - authentication failed!");
            }
            println!("WARNING: Balance check failed (may be expected): {:?}", e);
        },
    }
}

#[tokio::test(flavor = "multi_thread")]
#[ignore]
async fn test_real_api_get_api_keys() {
    let (private_key, _, _, _) = load_env_vars();

    let bootstrap = bootstrap_client(&private_key);
    let api_creds = bootstrap
        .create_or_derive_api_key(None)
        .await
        .expect("Failed to create/derive API key");
    let client = authenticated_client(private_key, api_creds);

    println!("Testing get_api_keys...");
    let result = client.get_api_keys().await;

    match result {
        Ok(keys) => {
            println!("PASS: Successfully fetched API keys");
            println!("  Found {} keys", keys.len());
        },
        Err(e) => {
            let err_str = format!("{:?}", e);
            if err_str.contains("401") {
                panic!("FAIL: 401 Unauthorized - authentication failed!");
            }
            panic!("Failed to get API keys: {:?}", e);
        },
    }
}

#[tokio::test(flavor = "multi_thread")]
#[ignore]
async fn test_real_api_get_notifications() {
    let (private_key, _, _, _) = load_env_vars();

    let bootstrap = bootstrap_client(&private_key);
    let api_creds = bootstrap
        .create_or_derive_api_key(None)
        .await
        .expect("Failed to create/derive API key");
    let client = authenticated_client(private_key, api_creds);

    println!("Testing get_notifications...");
    let result = client.get_notifications().await;

    match result {
        Ok(notifications) => {
            println!("PASS: Successfully fetched notifications");
            println!("  Notifications: {:?}", notifications);
        },
        Err(e) => {
            let err_str = format!("{:?}", e);
            if err_str.contains("401") {
                panic!("FAIL: 401 Unauthorized - authentication failed!");
            }
            panic!("Failed to get notifications: {:?}", e);
        },
    }
}

#[tokio::test(flavor = "multi_thread")]
#[ignore]
async fn test_real_api_market_data_endpoints() {
    let (private_key, _, _, _) = load_env_vars();

    let client = bootstrap_client(&private_key);

    println!("Testing market data endpoints (no auth required)...");

    // Get a valid token_id
    let markets = client
        .get_sampling_markets(None)
        .await
        .expect("Failed to get markets");
    let token_id = &markets.data[0].tokens[0].token_id;
    println!("PASS: Using token_id: {}", token_id);

    // Test multiple endpoints
    println!("Testing get_order_book...");
    let book = client
        .get_order_book(token_id)
        .await
        .expect("Failed to get order book");
    println!(
        "PASS: Order book: {} bids, {} asks",
        book.bids.len(),
        book.asks.len()
    );

    println!("Testing get_midpoint...");
    let midpoint = client
        .get_midpoint(token_id)
        .await
        .expect("Failed to get midpoint");
    println!("PASS: Midpoint: {}", midpoint.mid);

    println!("Testing get_spread...");
    let spread = client
        .get_spread(token_id)
        .await
        .expect("Failed to get spread");
    println!("PASS: Spread: {}", spread.spread);

    println!("Testing get_price...");
    let price = client
        .get_price(token_id, Side::BUY)
        .await
        .expect("Failed to get price");
    println!("PASS: Buy price: {}", price.price);

    println!("Testing get_tick_size...");
    let tick_size = client
        .get_tick_size(token_id)
        .await
        .expect("Failed to get tick size");
    println!("PASS: Tick size: {}", tick_size);

    println!("Testing get_markets...");
    let all_markets = client
        .get_markets(None)
        .await
        .expect("Failed to get all markets");
    println!("PASS: Found {} markets", all_markets.data.len());

    println!("\nPASS: All market data endpoints working!");
}

#[tokio::test(flavor = "multi_thread")]
#[ignore]
async fn test_real_api_batch_endpoints() {
    let (private_key, _, _, _) = load_env_vars();

    let client = bootstrap_client(&private_key);

    println!("Testing batch endpoints...");

    // Get multiple valid token_ids
    let markets = client
        .get_sampling_markets(None)
        .await
        .expect("Failed to get markets");
    let token_ids: Vec<String> = markets.data[0..2.min(markets.data.len())]
        .iter()
        .map(|m| m.tokens[0].token_id.clone())
        .collect();

    println!("Testing get_order_books (batch)...");
    let books = client
        .get_order_books(&token_ids)
        .await
        .expect("Failed to get order books");
    println!("PASS: Fetched {} order books", books.len());

    println!("Testing get_midpoints (batch)...");
    let midpoints = client
        .get_midpoints(&token_ids)
        .await
        .expect("Failed to get midpoints");
    println!("PASS: Fetched {} midpoints", midpoints.len());

    println!("Testing get_spreads (batch)...");
    let spreads = client
        .get_spreads(&token_ids)
        .await
        .expect("Failed to get spreads");
    println!("PASS: Fetched {} spreads", spreads.len());

    println!("\nPASS: All batch endpoints working!");
}

#[tokio::test(flavor = "multi_thread")]
#[ignore]
async fn test_real_api_health_check() {
    let client = ClobClient::new(HOST);

    println!("Testing health check endpoints...");

    let ok = client.get_ok().await;
    assert!(ok, "API health check failed!");
    println!("PASS: API is healthy");

    let server_time = client
        .get_server_time()
        .await
        .expect("Failed to get server time");
    println!("PASS: Server time: {}", server_time);
}