// One number, one control, and a ceiling that matches the table.
//
// "Split between" on Quick Split was two controls for one value sitting on top of each
// other: a row of chips 2 3 4 5, and under it a bar reading "2 ways" with a − and a +.
// Measured on an iPhone: 134px with its label, against 74px for "Smallest chip in play"
// right below it, which offers five choices in one row. And the number was written down
// three times at once — chip "2" lit gold, "2 ways" in the bar, and "Each of 2 players
// gets" in the result panel above. Two of those three were controls.
//
// The bar was never meant to be a bar. `.waysStepper` asked for `min-width: 150px` in a
// wrapping flex row, so on any phone it wrapped to a line of its own, and `flex: 1 1
// auto` then gave it all 358px of that line: 252px of empty readout with the − and the
// + pushed 304px apart. One-handed, on a screen 390px wide, they cannot both be reached.
//
// So the chips get a fifth chip. It reads "6+" whatever is behind it, because behind it
// is where the count is written, and the stepper only exists once you are through the
// door. Under six ways — every chop a home game will ever run — the field is one row.
//
// Two more things went with it. Neither stepper on this screen ever disabled an end, so
// − at the floor and + at the ceiling looked live and swallowed the tap; NN/G's stepper
// guidelines ask for exactly the opposite. And the per-pot chop capped its + with
// `Math.max(contenderCount, MAX_WAYS)`, which is always 12: a side pot that only P1 and
// P2 were eligible for would happily be chopped ten ways at $12 each.
const test = require("node:test");
const { describe } = require("node:test");
const assert = require("node:assert");
const fs = require("fs");
const path = require("path");
const { QuickSplit } = require("./load");

const ROOT = path.join(__dirname, "..", "..", "JoshHeaps.Net");
const CSS = fs.readFileSync(path.join(ROOT, "wwwroot", "css", "casino", "quicksplit.css"), "utf8");
const SRC = fs.readFileSync(path.join(ROOT, "wwwroot", "js", "casino", "holdem", "quickSplit.js"), "utf8");

const ruleFor = selector => {
    const at = CSS.indexOf(`\n${selector} {`);
    assert.ok(at >= 0, `there is no \`${selector}\` rule`);
    return CSS.slice(at, CSS.indexOf("}", at));
};

// ---------------------------------------------------------------------------

describe("where the chips stop and the stepper starts", () => {
    test("the door is the first count the chips don't cover", () => {
        assert.deepEqual(QuickSplit.WAY_CHOICES, [2, 3, 4, 5]);
        assert.equal(QuickSplit.overflowFrom(), 6);
    });

    // Derived rather than written down twice: adding a chip has to move the door.
    test("and it moves if a chip is added or taken away", () => {
        const was = QuickSplit.WAY_CHOICES;
        try {
            QuickSplit.WAY_CHOICES = [2, 3];
            assert.equal(QuickSplit.overflowFrom(), 4);
        } finally {
            QuickSplit.WAY_CHOICES = was;
        }
    });

    test("the stepper's own range is what the door promised", () => {
        assert.equal(QuickSplit.clampWays(QuickSplit.overflowFrom() - 1), 5);
        assert.equal(QuickSplit.clampWays(QuickSplit.MAX_WAYS + 4), QuickSplit.MAX_WAYS);
        assert.equal(QuickSplit.clampWays(0), QuickSplit.WAY_CHOICES[0]);
        assert.equal(QuickSplit.clampWays(-3), 2);
    });

    test("the door is drawn once, from the same number", () => {
        const at = SRC.indexOf("renderWayChoices() {");
        const body = SRC.slice(at, SRC.indexOf("\n    },", at));
        assert.match(body, /`\$\{this\.overflowFrom\(\)\}\+`/,
            "the chip's label is typed in rather than taken from where the chips stop");
        assert.match(body, /aria-label/, "\"6+\" is not a name a screen reader can read out");
    });

    // The chips and the stepper are one group: when the count is past the chips, no
    // chip is lit, and the door is.
    test("nothing is lit in two places at once", () => {
        const at = SRC.indexOf("renderWayChoices() {");
        const body = SRC.slice(at, SRC.indexOf("\n    },", at));
        assert.match(body, /const beyond = this\.ways >= this\.overflowFrom\(\)/);
        assert.match(body, /!beyond && this\.ways === count/,
            "a preset chip can still light up while the stepper holds a different number");
        assert.match(body, /if \(beyond\) row\.appendChild\(this\.buildWaysStepper\(\)\)/,
            "the stepper is drawn even when the chips are the control");
    });

    test("and the count is written in one place, without a unit the label already gave", () => {
        const at = SRC.indexOf("buildWaysStepper() {");
        assert.ok(at >= 0);
        const body = SRC.slice(at, SRC.indexOf("\n    },", at));
        assert.match(body, /readout\.textContent = String\(this\.ways\)/);
        assert.ok(!/\$\{this\.ways\} ways/.test(body), "the stepper is spelling the count out again");
    });
});

describe("both ends of both steppers", () => {
    test("a step that cannot happen says so", () => {
        const at = SRC.indexOf("makeStepButton(label, onPick, options) {");
        assert.ok(at >= 0, "the step buttons still take no disabled state");
        assert.match(SRC.slice(at, SRC.indexOf("\n    },", at)), /btn\.disabled = /);
    });

    test("the ways stepper disables its floor and its ceiling", () => {
        const at = SRC.indexOf("buildWaysStepper() {");
        const body = SRC.slice(at, SRC.indexOf("\n    },", at));
        assert.match(body, /disabled: this\.ways <= this\.overflowFrom\(\)/);
        assert.match(body, /disabled: this\.ways >= this\.MAX_WAYS/);
    });

    test("so does the per-pot chop", () => {
        const at = SRC.indexOf("addChopControl(row, amount, contenderCount) {");
        const body = SRC.slice(at, SRC.indexOf("\n    updateUneven()", at));
        assert.match(body, /disabled: ways <= 2/);
        assert.match(body, /disabled: ways >= ceiling/);
    });

    // 40x44 until the sweep first opened the even mode and read back `hittable 39x43`
    // on every touch viewport there is.
    test("and both ends are a fingertip wide, not just a fingertip tall", () => {
        const rule = ruleFor(".stepBtn");
        const px = axis => Number((rule.match(new RegExp(`${axis}:\\s*(\\d+)px`)) || [])[1]);
        assert.ok(px("width") >= 44, `a step button is ${px("width")}px wide`);
        assert.ok(px("height") >= 44, `a step button is ${px("height")}px tall`);
    });

    // Disabled has to look disabled, or it is the same silent tap with extra steps.
    test("and a disabled end is painted as one", () => {
        assert.match(ruleFor(".stepBtn:disabled"), /opacity:\s*0\.\d+/);
        assert.match(CSS, /\.stepBtn:not\(:disabled\):hover/,
            "a dead button still lights up under the mouse");
    });
});

describe("how many ways a pot can go", () => {
    // The whole of the bug: `Math.max` where `Math.min` was meant.
    test("never more ways than there are players who can win it", () => {
        assert.equal(QuickSplit.chopCeiling(2), 2);
        assert.equal(QuickSplit.chopCeiling(3), 3);
        assert.equal(QuickSplit.chopCeiling(9), 9);
    });

    test("and never past the screen's own ceiling", () => {
        assert.equal(QuickSplit.chopCeiling(20), QuickSplit.MAX_WAYS);
    });

    // A pot is only offered a chop at two contenders or more, but the floor is stated
    // here too so that a caller that gets it wrong can't produce a one-way split.
    test("a chop is at least two ways", () => {
        assert.equal(QuickSplit.chopCeiling(1), 2);
        assert.equal(QuickSplit.chopCeiling(0), 2);
    });

    test("the chop's + is held to it", () => {
        const at = SRC.indexOf("addChopControl(row, amount, contenderCount) {");
        const body = SRC.slice(at, SRC.indexOf("\n    updateUneven()", at));
        assert.match(body, /const ceiling = this\.chopCeiling\(contenderCount\)/);
        assert.match(body, /if \(ways < ceiling\)/);
        assert.ok(!/Math\.max\(contenderCount/.test(body), "the old ceiling is still there");
    });

    // Two eligible players is two ways and nothing else. A stepper with both ends dead
    // is furniture.
    test("a heads-up pot is offered no stepper at all", () => {
        const at = SRC.indexOf("addChopControl(row, amount, contenderCount) {");
        const body = SRC.slice(at, SRC.indexOf("\n    updateUneven()", at));
        assert.match(body, /if \(ceiling > 2\) \{/);
        assert.ok(body.indexOf("if (ceiling > 2) {") < body.indexOf('className = "unevenChopWays"'));
    });
});

describe("the bar that was never meant to be a bar", () => {
    test("the stepper is as wide as what is in it", () => {
        const rule = ruleFor(".waysStepper");
        assert.match(rule, /flex:\s*0 0 auto/);
        assert.ok(!/min-width/.test(rule),
            "a min-width in a wrapping row is what handed it the whole second line");
    });

    test("and the readout no longer pushes the two buttons apart", () => {
        const rule = ruleFor(".waysReadout");
        assert.ok(!/flex:\s*1(\s|;)/.test(rule));
        assert.match(rule, /min-width:\s*[\d.]+ch/);
        assert.match(rule, /tabular-nums/);
    });

    // It is standing in for a selected chip, so it is painted like one.
    test("the count is painted like the chip it replaces", () => {
        const chip = ruleFor(".choiceChip.selected");
        // Not `border-color`, which comes first in the rule and is a different gold.
        const colour = (chip.match(/(?:^|[^-\w])color:\s*(#[0-9a-f]{3,6})/i) || [])[1];
        assert.ok(colour, "the selected chip has no colour to match");
        assert.match(ruleFor(".waysReadout"), new RegExp(`color:\\s*${colour}`, "i"));
    });

    // The measurement that found it, kept where the next round will read it.
    test("what it measured is written beside the rule", () => {
        const at = CSS.indexOf("/* As wide as the three things in it");
        assert.ok(at >= 0, "the rule carries no note saying why");
        const note = CSS.slice(at, CSS.indexOf("*/", at));
        assert.match(note, /304px/);
        assert.match(note, /252px/);
    });
});

describe("what the sweep looks at", () => {
    const DRIVER = fs.readFileSync(path.join(__dirname, "runUiAudit.js"), "utf8");

    // It went straight to the all-in mode, so the mode the screen opens in was audited
    // zero times in fourteen rounds.
    test("both modes of the screen, not just the second one", () => {
        const at = DRIVER.indexOf("const modes = [");
        assert.ok(at >= 0, "the quick split pass still audits one mode");
        const body = DRIVER.slice(at, DRIVER.indexOf("];", at));
        assert.match(body, /"even"/);
        assert.match(body, /"all-in"/);
        assert.match(DRIVER, /quick split · \$\{mode\}/, "a failure won't say which mode it was in");
    });

    test("with the stepper open, since it isn't there otherwise", () => {
        const at = DRIVER.indexOf('["even", () => {');
        assert.ok(at >= 0);
        assert.match(DRIVER.slice(at, DRIVER.indexOf("}]", at)), /#waysChoices \.choiceChip/);
    });
});