use nox_gfx::canvas::{Canvas, Paint};
use nox_gfx::color::{hex, rgba, Color};
use nox_gfx::geom::{pt, Rect};
use nox_text::{draw_text, measure, Font, GlyphCache, TextStyle};

const BG: Color = hex(0x0e0e16);
const FG: Color = hex(0xe8e8f2);
const DIM: Color = hex(0x8a8aa5);
const ACCENT: Color = hex(0x7c5cff);
const CYAN: Color = hex(0x35d0ff);

const SANS: &str = "/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf";
const SANS_BOLD: &str = "/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf";
const SERIF: &str = "/usr/share/fonts/truetype/dejavu/DejaVuSerif.ttf";
const MONO: &str = "/usr/share/fonts/truetype/dejavu/DejaVuSansMono.ttf";
const LIB: &str = "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf";

fn main() {
    let (w, h) = (1180usize, 1000usize);
    let mut c = Canvas::new(w, h);
    c.fill(
        &{
            let mut p = nox_gfx::path::Path::new();
            p.rect(c.full());
            p
        },
        &nox_gfx::geom::IDENTITY,
        &Paint::vgrad(c.full(), hex(0x14141f), BG),
    );

    let sans_b = std::fs::read(SANS).unwrap();
    let bold_b = std::fs::read(SANS_BOLD).unwrap();
    let serif_b = std::fs::read(SERIF).unwrap();
    let mono_b = std::fs::read(MONO).unwrap();
    let lib_b = std::fs::read(LIB).unwrap();
    let sans = Font::parse(&sans_b).unwrap();
    let bold = Font::parse(&bold_b).unwrap();
    let serif = Font::parse(&serif_b).unwrap();
    let mono = Font::parse(&mono_b).unwrap();
    let lib = Font::parse(&lib_b).unwrap();
    let mut cache = GlyphCache::new();
    cache.set_gamma(0.85);

    let mut y = 62.0;
    draw_text(&mut c, &mut cache, &bold, "Noxstrap", 60.0, y, TextStyle::new(46.0), FG);
    let wdt = measure(&bold, "Noxstrap", TextStyle::new(46.0));
    draw_text(
        &mut c,
        &mut cache,
        &sans,
        "every glyph here was parsed and rasterised by this repo",
        60.0 + wdt + 16.0,
        y,
        TextStyle::new(14.0),
        DIM,
    );

    y += 40.0;
    c.fill_rect(Rect::new(60.0, y, 1120.0, y + 1.0), rgba(255, 255, 255, 26));

    y += 40.0;
    draw_text(&mut c, &mut cache, &bold, "SIZE LADDER", 60.0, y, TextStyle { px: 11.0, letter_spacing: 1.6, kerning: true }, CYAN);
    y += 26.0;
    for px in [8.0f32, 9.0, 10.0, 11.0, 12.0, 13.0, 14.0, 16.0, 18.0, 21.0, 24.0, 30.0] {
        draw_text(&mut c, &mut cache, &sans, &format!("{px:.0}"), 60.0, y, TextStyle::new(10.0), DIM);
        draw_text(
            &mut c,
            &mut cache,
            &sans,
            "Handgloves Roblox 0123 — the quick brown fox",
            92.0,
            y,
            TextStyle::new(px),
            FG,
        );
        y += px * 1.42 + 5.0;
    }

    y += 18.0;
    draw_text(&mut c, &mut cache, &bold, "KERNING", 60.0, y, TextStyle { px: 11.0, letter_spacing: 1.6, kerning: true }, CYAN);
    y += 28.0;
    for (label, kern) in [("off", false), ("on", true)] {
        draw_text(&mut c, &mut cache, &sans, label, 60.0, y, TextStyle::new(11.0), DIM);
        draw_text(
            &mut c,
            &mut cache,
            &sans,
            "AV Wa To LT V. Yo P, ff fi Type",
            92.0,
            y,
            TextStyle { px: 26.0, letter_spacing: 0.0, kerning: kern },
            if kern { FG } else { DIM },
        );
        y += 36.0;
    }

    y += 20.0;
    draw_text(&mut c, &mut cache, &bold, "FACES", 60.0, y, TextStyle { px: 11.0, letter_spacing: 1.6, kerning: true }, CYAN);
    y += 28.0;
    for (name, f) in [
        ("DejaVu Sans", &sans),
        ("DejaVu Sans Bold", &bold),
        ("DejaVu Serif", &serif),
        ("DejaVu Sans Mono", &mono),
        ("Liberation Sans", &lib),
    ] {
        draw_text(&mut c, &mut cache, &sans, name, 60.0, y, TextStyle::new(11.0), DIM);
        draw_text(&mut c, &mut cache, f, "Bootstrapper — Ærøskøbing, naïve café 42%", 240.0, y, TextStyle::new(17.0), FG);
        y += 30.0;
    }

    y += 16.0;
    draw_text(&mut c, &mut cache, &bold, "COMPOSITES & COVERAGE", 60.0, y, TextStyle { px: 11.0, letter_spacing: 1.6, kerning: true }, CYAN);
    y += 30.0;
    draw_text(&mut c, &mut cache, &sans, "ÀÁÂÃÄÅ Çéèêë ñÑ öÖ üÜ ýÿ Ω→ ‹›«» ①②③ ★☆♠♥ ¼½¾ ≈≠≤≥", 60.0, y, TextStyle::new(22.0), FG);

    y += 46.0;
    let panel = Rect::new(60.0, y, 1120.0, y + 92.0);
    let mut p = nox_gfx::path::Path::new();
    p.rrect(panel, 12.0);
    c.shadow(&p, &nox_gfx::geom::IDENTITY, 14.0, rgba(0, 0, 0, 150), pt(0.0, 6.0));
    c.fill(&p, &nox_gfx::geom::IDENTITY, &Paint::vgrad(panel, hex(0x1b1b28), hex(0x15151f)));
    c.stroke(&p, &nox_gfx::geom::IDENTITY, &Paint::Solid(rgba(255, 255, 255, 20)), &nox_gfx::canvas::Stroke::new(1.0));
    draw_text(&mut c, &mut cache, &bold, "Installing Roblox", 84.0, y + 34.0, TextStyle::new(17.0), FG);
    draw_text(&mut c, &mut cache, &mono, "version-a1b2c3d4e5f6  ·  184.2 MB / 271.9 MB", 84.0, y + 58.0, TextStyle::new(12.5), DIM);
    let track = Rect::new(84.0, y + 70.0, 1096.0, y + 76.0);
    c.fill_rrect(track, 3.0, &Paint::Solid(rgba(255, 255, 255, 22)));
    let fill = Rect::new(track.x0, track.y0, track.x0 + (track.x1 - track.x0) * 0.677, track.y1);
    c.fill_rrect(fill, 3.0, &Paint::hgrad(fill, ACCENT, CYAN));

    let out = std::env::args().nth(1).unwrap_or_else(|| "specimen.png".into());
    std::fs::write(&out, c.to_png()).unwrap();
    println!(
        "wrote {out}  ({} glyphs cached, {} KB)",
        cache.len(),
        cache.bytes() / 1024
    );
}