//! Integration tests for the SelectionList widget
//!
//! These tests verify the SelectionList widget's behavior and public API
//! from an external perspective, testing the widget as a user of the
//! library would interact with it.

// Test Notes:
// Simulator API https://raw.githubusercontent.com/iced-rs/iced/master/test/src/simulator.rs

#[macro_use]
mod common;

use iced_aw::SelectionList;
use iced_test::Error;

#[derive(Clone, Debug)]
enum Message {
    Selected(usize, String),
}

// Generate test helpers for this Message type
test_helpers!(Message);

// ============================================================================
// Basic Text Finding Tests
// ============================================================================

#[test]
fn selection_list_can_find_option_text() -> Result<(), Error> {
    let options: &'static [String] = Box::leak(Box::new(vec![
        "Option 1".to_string(),
        "Option 2".to_string(),
        "Option 3".to_string(),
    ]));

    let (app, _) = App::new(move || SelectionList::new(options, Message::Selected).into());
    let mut ui = simulator(&app);

    assert!(
        ui.find("Option 1").is_ok(),
        "Option 1 text should be findable"
    );
    assert!(
        ui.find("Option 2").is_ok(),
        "Option 2 text should be findable"
    );
    assert!(
        ui.find("Option 3").is_ok(),
        "Option 3 text should be findable"
    );

    Ok(())
}

#[test]
fn selection_list_can_find_all_options_in_list() -> Result<(), Error> {
    let options: &'static [String] = Box::leak(Box::new(vec![
        "Apple".to_string(),
        "Banana".to_string(),
        "Cherry".to_string(),
        "Date".to_string(),
        "Elderberry".to_string(),
    ]));

    let (app, _) = App::new(move || SelectionList::new(options, Message::Selected).into());

    let mut ui = simulator(&app);

    // Snapshot testing: verify visual rendering matches baseline
    assert_snapshot_matches(
        &mut ui,
        "tests/snapshots/selection_list_can_find_all_options_in_list",
    )?;

    // Verify all options are findable
    for option in &["Apple", "Banana", "Cherry", "Date", "Elderberry"] {
        assert!(ui.find(*option).is_ok(), "{} should be findable", option);
    }

    Ok(())
}

// ============================================================================
// Click and Selection Tests
// ============================================================================

#[test]
fn selection_list_clicking_option_produces_selected_message() -> Result<(), Error> {
    let options: &'static [String] = Box::leak(Box::new(vec![
        "First".to_string(),
        "Second".to_string(),
        "Third".to_string(),
    ]));

    let (mut app, _) = App::new(move || SelectionList::new(options, Message::Selected).into());

    let mut ui = simulator(&app);

    // Verify option is findable
    assert!(ui.find("Second").is_ok(), "Second should be findable");

    // Click the option
    ui.click("Second")?;

    // Verify we got a Selected message
    let messages = collect_messages(ui, &mut app, |m| matches!(m, Message::Selected(_, _)));

    assert!(
        !messages.is_empty(),
        "Clicking option should produce Selected message"
    );

    let Message::Selected(index, value) = &messages[0];
    assert_eq!(*index, 1, "Selected index should be 1");
    assert_eq!(value, "Second", "Selected value should be 'Second'");

    Ok(())
}

#[test]
fn selection_list_clicking_first_option_produces_correct_message() -> Result<(), Error> {
    let options: &'static [String] = Box::leak(Box::new(vec![
        "Alpha".to_string(),
        "Beta".to_string(),
        "Gamma".to_string(),
    ]));

    let (mut app, _) = App::new(move || SelectionList::new(options, Message::Selected).into());

    let mut ui = simulator(&app);
    ui.click("Alpha")?;

    let messages = collect_messages(ui, &mut app, |m| matches!(m, Message::Selected(_, _)));

    assert!(
        !messages.is_empty(),
        "Clicking should produce Selected message"
    );

    let Message::Selected(index, value) = &messages[0];
    assert_eq!(*index, 0, "First option should have index 0");
    assert_eq!(value, "Alpha");

    Ok(())
}

#[test]
fn selection_list_clicking_last_option_produces_correct_message() -> Result<(), Error> {
    let options: &'static [String] = Box::leak(Box::new(vec![
        "Red".to_string(),
        "Green".to_string(),
        "Blue".to_string(),
    ]));

    let (mut app, _) = App::new(move || SelectionList::new(options, Message::Selected).into());

    let mut ui = simulator(&app);
    ui.click("Blue")?;

    let messages = collect_messages(ui, &mut app, |m| matches!(m, Message::Selected(_, _)));

    assert!(
        !messages.is_empty(),
        "Clicking should produce Selected message"
    );

    let Message::Selected(index, value) = &messages[0];
    assert_eq!(*index, 2, "Last option should have index 2");
    assert_eq!(value, "Blue");

    Ok(())
}

// ============================================================================
// Multiple Selection Workflow Tests
// ============================================================================

#[test]
fn selection_list_clicking_different_options_produces_different_messages() -> Result<(), Error> {
    let options: &'static [String] = Box::leak(Box::new(vec![
        "Item A".to_string(),
        "Item B".to_string(),
        "Item C".to_string(),
    ]));

    let (mut app, _) = App::new(move || SelectionList::new(options, Message::Selected).into());

    // First click
    let mut ui = simulator(&app);
    ui.click("Item A")?;

    let messages = collect_messages(ui, &mut app, |m| matches!(m, Message::Selected(_, _)));
    assert!(
        !messages.is_empty(),
        "First click should produce Selected message"
    );
    let Message::Selected(index, value) = &messages[0];
    assert_eq!(*index, 0, "First click should select Item A");
    assert_eq!(value, "Item A");

    // Second click
    let mut ui = simulator(&app);
    ui.click("Item C")?;

    let messages = collect_messages(ui, &mut app, |m| matches!(m, Message::Selected(_, _)));
    assert!(
        !messages.is_empty(),
        "Second click should produce Selected message"
    );
    let Message::Selected(index, value) = &messages[0];
    assert_eq!(*index, 2, "Second click should select Item C");
    assert_eq!(value, "Item C");

    Ok(())
}

// ============================================================================
// Edge Cases and Special Characters
// ============================================================================

#[test]
fn selection_list_handles_options_with_numbers() -> Result<(), Error> {
    let options: &'static [String] = Box::leak(Box::new(vec![
        "Item 1".to_string(),
        "Item 2".to_string(),
        "Item 3".to_string(),
    ]));

    let (mut app, _) = App::new(move || SelectionList::new(options, Message::Selected).into());

    let mut ui = simulator(&app);

    assert!(ui.find("Item 1").is_ok());
    assert!(ui.find("Item 2").is_ok());
    assert!(ui.find("Item 3").is_ok());

    ui.click("Item 2")?;

    assert_message_received(
        ui,
        &mut app,
        |m| matches!(m, Message::Selected(1, value) if value == "Item 2"),
        "Item 2 should be selectable",
    );

    Ok(())
}

#[test]
fn selection_list_handles_options_with_special_characters() -> Result<(), Error> {
    let options: &'static [String] = Box::leak(Box::new(vec![
        "Option-A".to_string(),
        "Option_B".to_string(),
        "Option.C".to_string(),
    ]));

    let (app, _) = App::new(move || SelectionList::new(options, Message::Selected).into());

    let mut ui = simulator(&app);

    assert!(ui.find("Option-A").is_ok());
    assert!(ui.find("Option_B").is_ok());
    assert!(ui.find("Option.C").is_ok());

    Ok(())
}

#[test]
fn selection_list_handles_empty_list() -> Result<(), Error> {
    let options: &'static [String] = Box::leak(Box::new(vec![]));

    let (app, _) = App::new(move || SelectionList::new(options, Message::Selected).into());

    let mut ui = simulator(&app);

    // Just verify it doesn't crash with empty list
    // Try to find a non-existent option
    assert!(ui.find("NonExistent").is_err());

    Ok(())
}

#[test]
fn selection_list_handles_single_option() -> Result<(), Error> {
    let options: &'static [String] = Box::leak(Box::new(vec!["Only Option".to_string()]));

    let (mut app, _) = App::new(move || SelectionList::new(options, Message::Selected).into());

    let mut ui = simulator(&app);

    assert!(ui.find("Only Option").is_ok());
    ui.click("Only Option")?;

    assert_message_received(
        ui,
        &mut app,
        |m| matches!(m, Message::Selected(0, value) if value == "Only Option"),
        "Single option should be selectable",
    );

    Ok(())
}

// ============================================================================
// Long List Tests
// ============================================================================

#[test]
fn selection_list_handles_long_list_of_options() -> Result<(), Error> {
    let options: &'static [String] = Box::leak(
        (1..=20)
            .map(|i| format!("Option {}", i))
            .collect::<Vec<String>>()
            .into_boxed_slice(),
    );

    let (mut app, _) = App::new(move || SelectionList::new(options, Message::Selected).into());

    let mut ui = simulator(&app);

    // Verify some options are findable
    assert!(ui.find("Option 1").is_ok());
    assert!(ui.find("Option 10").is_ok());
    assert!(ui.find("Option 20").is_ok());

    // Click an option in the middle
    ui.click("Option 15")?;

    assert_message_received(
        ui,
        &mut app,
        |m| matches!(m, Message::Selected(14, value) if value == "Option 15"),
        "Option 15 should be selectable",
    );

    Ok(())
}

// ============================================================================
// Widget Configuration Tests
// ============================================================================

#[test]
fn selection_list_with_custom_width() -> Result<(), Error> {
    let options: &'static [String] = Box::leak(Box::new(vec![
        "A".to_string(),
        "B".to_string(),
        "C".to_string(),
    ]));

    let (app, _) = App::new(move || {
        SelectionList::new(options, Message::Selected)
            .width(300)
            .into()
    });

    let mut ui = simulator(&app);

    // Verify options are still findable with custom width
    assert!(ui.find("A").is_ok());
    assert!(ui.find("B").is_ok());
    assert!(ui.find("C").is_ok());

    Ok(())
}

#[test]
fn selection_list_with_custom_height() -> Result<(), Error> {
    let options: &'static [String] = Box::leak(Box::new(vec![
        "X".to_string(),
        "Y".to_string(),
        "Z".to_string(),
    ]));

    let (app, _) = App::new(move || {
        SelectionList::new(options, Message::Selected)
            .height(200)
            .into()
    });

    let mut ui = simulator(&app);

    // Verify options are still findable with custom height
    assert!(ui.find("X").is_ok());
    assert!(ui.find("Y").is_ok());
    assert!(ui.find("Z").is_ok());

    Ok(())
}
