abstracttui 0.2.12

//! Chart widget tests, split out to keep `chart.rs` within the
//! file-size budget; deterministic fixed-series pins.

use super::*;
use crate::base::Size;
use crate::theme::default_theme;
use crate::widgets::test_util::{draw_into, row};

#[test]
fn braille_bits_match_unicode_dot_order() {
    // Dots 1..8 in the standard layout — the whole grid rides this.
    assert_eq!(braille_bit(0, 0), 0x01);
    assert_eq!(braille_bit(0, 3), 0x40);
    assert_eq!(braille_bit(1, 0), 0x08);
    assert_eq!(braille_bit(1, 3), 0x80);
}

#[test]
fn sparkline_renders_deterministic_ramp() {
    let t = default_theme().tokens;
    // 4 samples across 2 cells (4 dot columns): rows 3,2,1,0.
    let el = Sparkline::new(vec![0.0, 1.0, 2.0, 3.0]).element(&t);
    let c = draw_into(el, Size::new(2, 1));
    assert_eq!(row(&c, 0), "⡠⠊");
    // Determinism: same input, same cells.
    let el = Sparkline::new(vec![0.0, 1.0, 2.0, 3.0]).element(&t);
    let c2 = draw_into(el, Size::new(2, 1));
    assert_eq!(row(&c2, 0), row(&c, 0));
    // Line color is the requested ramp slot.
    let el = Sparkline::new(vec![0.0, 1.0, 2.0, 3.0]).slot(3).element(&t);
    let c = draw_into(el, Size::new(2, 1));
    assert_eq!(c.cell(Point::new(0, 0)).unwrap().1, t.chart(3));
}

#[test]
fn sparkline_flat_series_centers_and_gaps_skip() {
    let t = default_theme().tokens;
    let el = Sparkline::new(vec![5.0, 5.0, 5.0, 5.0]).element(&t);
    let c = draw_into(el, Size::new(2, 1));
    // Flat: mid-range row (row 2 of 0..=3 -> dots 0x04/0x20 = '⠤').
    assert_eq!(row(&c, 0), "⠤⠤");

    let el = Sparkline::new(vec![f32::NAN, f32::NAN]).element(&t);
    let c = draw_into(el, Size::new(2, 1));
    assert_eq!(row(&c, 0).trim(), "", "all-NaN series draws nothing");
}

#[test]
fn line_chart_axes_labels_and_series_colors() {
    let t = default_theme().tokens;
    let el = LineChart::new(vec![vec![0.0, 10.0], vec![10.0, 0.0]])
        .range(0.0, 10.0)
        .element(&t);
    let c = draw_into(el, Size::new(12, 4));
    // Gutter labels: max top-left, min above the x-axis.
    assert!(row(&c, 0).starts_with("10"), "{:?}", row(&c, 0));
    assert!(row(&c, 2).starts_with('0'), "{:?}", row(&c, 2));
    // Axis glyphs present: corner sits after the "10 " gutter
    // (label width 2 + pad 1 = column 3).
    assert_eq!(c.cell(Point::new(3, 3)).unwrap().0, '└');
    // Both series drew in their ramp slots somewhere in the plot.
    let mut seen = [false, false];
    for y in 0..4 {
        for x in 0..12 {
            let (_, fg, _) = c.cell(Point::new(x, y)).unwrap();
            if fg == t.chart(0) {
                seen[0] = true;
            }
            if fg == t.chart(1) {
                seen[1] = true;
            }
        }
    }
    assert!(seen[0] && seen[1], "both series colored");
}

#[test]
fn line_chart_degrades_without_room_and_never_panics() {
    let t = default_theme().tokens;
    for size in [
        Size::new(0, 0),
        Size::new(1, 1),
        Size::new(3, 1),
        Size::new(5, 2),
    ] {
        let el = LineChart::new(vec![vec![1.0, 2.0, 3.0]]).element(&t);
        let _ = draw_into(el, size);
    }
    // Empty series set: nothing drawn, no range, no panic.
    let el = LineChart::new(vec![]).element(&t);
    let c = draw_into(el, Size::new(6, 3));
    assert_eq!(row(&c, 1).trim(), "");
}

#[test]
fn bar_chart_eighth_precision_and_cycling_colors() {
    let t = default_theme().tokens;
    // h=2 cells = 16 eighths. 0.5 -> 8 (one full cell); 9/16 -> full
    // + one eighth above.
    let el = BarChart::new(vec![0.5, 9.0 / 16.0])
        .range(0.0, 1.0)
        .bar(1, 1)
        .element(&t);
    let c = draw_into(el, Size::new(3, 2));
    assert_eq!(c.cell(Point::new(0, 1)).unwrap().0, '█');
    assert_eq!(c.cell(Point::new(0, 0)).unwrap().0, ' ');
    assert_eq!(c.cell(Point::new(2, 1)).unwrap().0, '█');
    assert_eq!(c.cell(Point::new(2, 0)).unwrap().0, '▁');
    // Default coloring cycles the ramp per bar.
    assert_eq!(c.cell(Point::new(0, 1)).unwrap().1, t.chart(0));
    assert_eq!(c.cell(Point::new(2, 1)).unwrap().1, t.chart(1));
    // Single-slot override pins every bar.
    let el = BarChart::new(vec![1.0, 1.0]).slot(4).bar(1, 0).element(&t);
    let c = draw_into(el, Size::new(2, 1));
    assert_eq!(c.cell(Point::new(0, 0)).unwrap().1, t.chart(4));
    assert_eq!(c.cell(Point::new(1, 0)).unwrap().1, t.chart(4));
}

// ---------------------------------------------------------------------------
// Time axis (backlog 0190)
// ---------------------------------------------------------------------------

#[test]
fn line_chart_time_axis_anchors_now_and_adapts_density() {
    use std::time::Duration;
    let t = default_theme().tokens;
    let data: Vec<f32> = (0..72).map(|i| (i % 10) as f32).collect();
    // Wide: nice 5s ticks; the axis row is the bottom row.
    let el = LineChart::new(vec![data.clone()])
        .range(0.0, 10.0)
        .time_axis(Duration::from_millis(250) * 71)
        .element(&t);
    let c = draw_into(el, Size::new(60, 8));
    let axis_row = row(&c, 7);
    assert!(
        axis_row.trim_end().ends_with("now"),
        "now anchors the right edge: {axis_row:?}"
    );
    for label in ["-5s", "-10s", "-15s"] {
        assert!(axis_row.contains(label), "missing {label}: {axis_row:?}");
    }
    // Label ink matches the value labels (text_faint), embedded in the
    // border-ink rule row. (Char columns, not byte offsets: the rule
    // row's '─' is multibyte.)
    let byte = axis_row.find("now").unwrap();
    let nx = axis_row[..byte].chars().count() as i32;
    assert_eq!(c.cell(Point::new(nx, 7)).unwrap().1, t.text_faint);
    assert_eq!(c.cell(Point::new(nx - 1, 7)).unwrap().0, '─');
    assert_eq!(c.cell(Point::new(nx - 1, 7)).unwrap().1, t.border);

    // Deterministic: same inputs, same cells.
    let el = LineChart::new(vec![data.clone()])
        .range(0.0, 10.0)
        .time_axis(Duration::from_millis(250) * 71)
        .element(&t);
    let c2 = draw_into(el, Size::new(60, 8));
    for y in 0..8 {
        assert_eq!(row(&c, y), row(&c2, y), "row {y} nondeterministic");
    }

    // Narrow: density adapts (fewer labels, none colliding).
    let el = LineChart::new(vec![data])
        .range(0.0, 10.0)
        .time_axis(Duration::from_millis(250) * 71)
        .element(&t);
    let c = draw_into(el, Size::new(30, 6));
    let axis_row = row(&c, 5);
    assert!(axis_row.trim_end().ends_with("now"), "{axis_row:?}");
    assert!(axis_row.contains("-10s"), "{axis_row:?}");
    assert!(
        !axis_row.contains("-5s"),
        "narrow keeps 10s ticks only: {axis_row:?}"
    );
}

#[test]
fn sparkline_time_axis_labels_below_and_one_row_degrades() {
    use std::time::Duration;
    let t = default_theme().tokens;
    let data: Vec<f32> = (0..40).map(|i| (i % 7) as f32).collect();
    let el = Sparkline::new(data.clone())
        .time_axis(Duration::from_secs(39))
        .element(&t);
    let c = draw_into(el, Size::new(40, 2));
    assert!(!row(&c, 0).trim().is_empty(), "trend line on row 0");
    let labels = row(&c, 1);
    assert!(labels.trim_end().ends_with("now"), "{labels:?}");
    assert!(labels.contains("-10s"), "{labels:?}");
    // One-row rect: bare trend line, labels degrade away, no panic.
    let el = Sparkline::new(data)
        .time_axis(Duration::from_secs(39))
        .element(&t);
    let c = draw_into(el, Size::new(40, 1));
    assert!(!row(&c, 0).trim().is_empty());
}

/// Gap honesty end-to-end: a sampling pause recorded by `TimeSeries`
/// pads NAN slots, and the chart draws a HOLE for them — the pause
/// still occupies x-width (no time compression).
#[test]
fn time_series_pause_renders_a_hole_never_compression() {
    use std::time::Duration;
    let t = default_theme().tokens;
    let ms = Duration::from_millis;
    let mut ts = TimeSeries::with_slots(ms(100), 16);
    for i in 0..6u64 {
        ts.push(ms(i * 100), 5.0);
    }
    // Pause 6 slots, then resume for 4.
    for i in 12..16u64 {
        ts.push(ms(i * 100), 5.0);
    }
    let samples = ts.samples();
    assert_eq!(samples.len(), 16, "pause slots retained (no compression)");
    // Flat 0..10 range keeps the line mid-plot; the hole is the pause.
    let el = LineChart::new(vec![samples])
        .range(0.0, 10.0)
        .axes(false)
        .time_axis(ts.span())
        .element(&t);
    let size = Size::new(16, 3);
    let c = draw_into(el, size);
    // Middle band columns (the pause: slots 6..12 of 16 across 16
    // cells) are empty in every row; drawn columns exist on both sides.
    let hole = |x: i32| (0..size.h).all(|y| c.cell(Point::new(x, y)).unwrap().0 == ' ');
    assert!(!hole(1), "pre-pause line drawn");
    assert!(hole(7) && hole(8), "pause renders as a hole");
    assert!(!hole(14), "post-pause line drawn");
}

#[test]
fn bar_chart_edge_cases() {
    let t = default_theme().tokens;
    // Zero/NaN/overflow values and zero-size rects are all safe.
    let el = BarChart::new(vec![0.0, f32::NAN, 99.0])
        .range(0.0, 1.0)
        .element(&t);
    let c = draw_into(el, Size::new(8, 2));
    // Over-range clamps to a full column, NaN leaves its slot empty.
    assert_eq!(c.cell(Point::new(6, 0)).unwrap().0, '█');
    assert_eq!(c.cell(Point::new(3, 1)).unwrap().0, ' ');
    let el = BarChart::new(vec![]).element(&t);
    let _ = draw_into(el, Size::new(0, 0));
}