use std::collections::BTreeMap;
use domain::{
    DisplayHint, KeyMapping, Value, WidgetConfig, WidgetId, WidgetState,
};
use application::DataProjection;

fn weather_widget() -> WidgetConfig {
    WidgetConfig::new(
        1,
        "weather".into(),
        DisplayHint::IconValue,
        10,
        vec![
            KeyMapping { source_path: "$.temp".into(), target_key: "temperature".into() },
            KeyMapping { source_path: "$.icon".into(), target_key: "icon".into() },
        ],
    )
}

fn weather_response(temp: f64) -> Value {
    Value::Object(BTreeMap::from([
        ("temp".into(), Value::Number(temp)),
        ("icon".into(), Value::String("sunny".into())),
    ]))
}

#[test]
fn apply_poll_result_detects_new_widget_state() {
    let mut projection = DataProjection::new();
    let widgets = vec![weather_widget()];

    let changed = projection.apply_poll_result(10, &weather_response(5.4), &widgets);

    assert_eq!(changed.len(), 1);
    assert_eq!(changed[0].0, 1);
    assert_eq!(changed[0].1.data.get("temperature"), Some(&Value::Number(5.4)));
}

#[test]
fn apply_poll_result_returns_empty_when_nothing_changed() {
    let mut projection = DataProjection::new();
    let widgets = vec![weather_widget()];

    projection.apply_poll_result(10, &weather_response(5.4), &widgets);
    let changed = projection.apply_poll_result(10, &weather_response(5.4), &widgets);

    assert!(changed.is_empty());
}

#[test]
fn apply_poll_result_detects_changed_value() {
    let mut projection = DataProjection::new();
    let widgets = vec![weather_widget()];

    projection.apply_poll_result(10, &weather_response(5.4), &widgets);
    let changed = projection.apply_poll_result(10, &weather_response(6.1), &widgets);

    assert_eq!(changed.len(), 1);
    assert_eq!(changed[0].1.data.get("temperature"), Some(&Value::Number(6.1)));
}

#[test]
fn apply_poll_result_only_updates_widgets_bound_to_source() {
    let mut projection = DataProjection::new();
    let widgets = vec![
        weather_widget(),
        WidgetConfig::new(
            2,
            "portfolio".into(),
            DisplayHint::KeyValue,
            20,
            vec![
                KeyMapping { source_path: "$.value".into(), target_key: "amount".into() },
            ],
        ),
    ];

    let changed = projection.apply_poll_result(10, &weather_response(5.4), &widgets);

    assert_eq!(changed.len(), 1);
    assert_eq!(changed[0].0, 1);
}