// How tall the felt is allowed to be.
//
// The bar is fixed to the bottom of the screen and grows with the hand, so the table
// has to be told what is left. Everything below is the arithmetic that decides it —
// the part that can be wrong without anyone noticing until a seat is behind the Fold
// button.
const test = require("node:test");
const { describe } = require("node:test");
const assert = require("node:assert");
const { ActionBar } = require("./load");

// window height, bar height, and how far down the page the felt starts.
const room = (windowHeight, barHeight, top) => ActionBar.feltRoomFor(windowHeight, barHeight, top);

describe("the room left for the felt", () => {
    test("is what the window has after the bar, the header and the bottom seat", () => {
        const reserved = ActionBar.SEAT_OVERHANG_PX + ActionBar.FELT_GAP_PX;
        assert.equal(room(900, 127, 146), 900 - 127 - 146 - reserved);
    });

    test("shrinks when the bar grows mid-hand", () => {
        // Side pots make the bar taller exactly when the dealer most needs to see who
        // is still in.
        const quiet = room(900, 117, 146);
        const sidePots = room(900, 172, 146);
        assert.equal(quiet - sidePots, 55);
    });

    test("leaves the bottom seat's overhang out of it", () => {
        // The seat pucks hang below the felt's edge; the felt has to stop short by that
        // much or the ring ends up in the bar even though the felt doesn't.
        assert.ok(ActionBar.SEAT_OVERHANG_PX > 30, "half a puck");
        assert.ok(room(900, 127, 146) < 900 - 127 - 146);
    });
});

describe("a window too short to give what was asked", () => {
    // A phone on its side: 390px tall, 127px of that is the bar and 119px is
    // everything above the felt. What's left is under 100.
    const landscape = () => room(390, 127, 119);

    test("gets the measurement, not a comfortable number", () => {
        // The floor used to be 220px, which this window hasn't got. Holding out for it
        // put the bottom row of seats 26px inside the action bar — the exact fault the
        // measurement exists to prevent.
        assert.ok(landscape() < 150, `${landscape()}px`);
        assert.ok(landscape() + 119 + 127 <= 390, "the felt still ends above the bar");
    });

    test("still draws a table rather than a line", () => {
        assert.equal(ActionBar.feltRoomFor(200, 160, 100), ActionBar.FELT_FLOOR_PX);
        assert.equal(ActionBar.feltRoomFor(0, 0, 0), ActionBar.FELT_FLOOR_PX);
    });

    test("never returns something a browser can't lay out", () => {
        [[390, 300, 200], [100, 90, 90], [-10, 0, 0]].forEach(([h, bar, top]) => {
            const answer = ActionBar.feltRoomFor(h, bar, top);
            assert.ok(Number.isFinite(answer) && answer > 0, `${h}/${bar}/${top} gave ${answer}`);
        });
    });
});

describe("a window with room to spare", () => {
    test("hands over everything that's left, floor or no floor", () => {
        const reserved = ActionBar.SEAT_OVERHANG_PX + ActionBar.FELT_GAP_PX;
        assert.equal(room(1000, 127, 146), 1000 - 127 - 146 - reserved);
        assert.equal(room(1366, 120, 206), 1366 - 120 - 206 - reserved);
    });

    test("gives a whole number of pixels", () => {
        assert.equal(room(844.4, 127.6, 223.2) % 1, 0);
    });
});