// The five cards in the middle of the felt, and the sheet of glass over them.
//
// Two faults, one on top of the other, and the sweep could see neither.
//
// #seatsLayer is a transparent `inset: 0` sibling of the table that holds the seat
// pucks. The pucks ring the felt; the middle of it is empty layer — and an element with
// no background still hit-tests. So every tap aimed at the community cards landed on the
// layer instead. Measured at 1280x900 with the board on and five cards out: all five
// hit-tested to `div#seatsLayer`, on every screen wide enough to keep the board in the
// middle rather than on the strip. Each one is a button that opens the picker for that
// card, and not one of them could be pressed. #betsLayer, the other sheet over the felt,
// has been `pointer-events: none` since it was written.
//
// Underneath that, the cards were a little over half the size they were meant to be.
// `placeBoard` measures how much middle the felt has and writes it to the centre's
// `max-width` — but a max-width caps a box, it does not claim anything, and the centre
// is a flex column that sizes to its content. So with 463px of measured room it went on
// being 136px wide, the board row inside it is `width: 100%` of that, and five cards
// sharing 136px come to rest on their own `min-width`: 24px, against a 44px floor this
// sweep holds every other control on the felt to. On the strip, where the row simply
// gets the width of the page, the same cards have always drawn 44.
//
// Neither was visible to a scripted probe — `.click()` on a node skips hit-testing
// entirely — and the sweep's occlusion check had only ever been shown three selectors'
// worth of the page: the action bar, the header, and the seats.
const test = require("node:test");
const { describe } = require("node:test");
const assert = require("node:assert");
const fs = require("fs");
const path = require("path");

const ROOT = path.join(__dirname, "..", "..", "JoshHeaps.Net");
const CSS = fs.readFileSync(path.join(ROOT, "wwwroot", "css", "casino", "holdem.css"), "utf8");
const AUDIT = fs.readFileSync(path.join(__dirname, "uiAudit.js"), "utf8");
const DRIVER = fs.readFileSync(path.join(__dirname, "runUiAudit.js"), "utf8");
const src = name => fs.readFileSync(path.join(ROOT, "wwwroot", "js", "casino", "holdem", `${name}.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("the sheet over the felt", () => {
    test("it does not take taps meant for what is under it", () => {
        assert.match(ruleFor("#seatsLayer"), /pointer-events:\s*none/);
    });

    // Which is only safe because the thing in it that *is* a control says so itself.
    test("but a seat still does", () => {
        assert.match(ruleFor(".seat"), /pointer-events:\s*auto/);
    });

    // The two chips that want to stay untouchable set their own value and are inside a
    // seat, so they override what they inherit rather than depending on the layer.
    test("and the two pucks that are markers rather than controls still are", () => {
        assert.match(ruleFor(".dealerChip:not(.active)"), /pointer-events:\s*none/);
        assert.match(ruleFor(".dealerChip.active"), /pointer-events:\s*none/);
    });

    test("the other sheet is unchanged, and was always right", () => {
        assert.match(ruleFor("#betsLayer"), /pointer-events:\s*none/);
    });

    test("what it measured is written beside the rule", () => {
        const at = CSS.indexOf("/* A transparent sheet over the whole felt");
        assert.ok(at >= 0, "the rule carries no note saying why");
        const note = CSS.slice(at, CSS.indexOf("*/", at));
        assert.match(note, /1280x900/);
        assert.match(note, /seatsLayer/);
    });
});

describe("how wide the middle actually is", () => {
    test("the room it measured is claimed, not only capped", () => {
        const render = src("render");
        const at = render.indexOf("placeBoard(row, strip) {");
        assert.ok(at >= 0, "there is no placeBoard");
        const body = render.slice(at, render.indexOf("\n    },", at));
        assert.match(body, /centre\.style\.width = `\$\{Math\.round\(width\)\}px`/,
            "the centre is still given a ceiling and no floor, so it shrink-wraps");
        assert.match(body, /centre\.style\.maxWidth = `\$\{Math\.round\(width\)\}px`/);
    });

    // Both come off together when the board leaves the felt, or the centre would keep a
    // width measured for a board that is no longer in it.
    test("and both are given back when the board moves to the strip", () => {
        const render = src("render");
        const at = render.indexOf("placeBoard(row, strip) {");
        const body = render.slice(at, render.indexOf("} else {", at));
        assert.match(body, /centre\.style\.width = ""/);
        assert.match(body, /centre\.style\.maxWidth = ""/);
    });

    // The floor is what it always said it was; what changed is that the cards can now
    // reach past it to the ceiling.
    test("a card is still allowed to grow to a thumb", () => {
        const rule = ruleFor(".boardCard");
        assert.match(rule, /max-width:\s*44px/);
        assert.match(rule, /min-height:\s*44px/);
        assert.match(rule, /flex:\s*1 1 0/);
    });

    test("what it measured is written beside the code", () => {
        const render = src("render");
        const at = render.indexOf("// Both, and the width is the half that was missing.");
        assert.ok(at >= 0, "the fix carries no note saying why");
        const note = render.slice(at, at + 1400);
        assert.match(note, /463px/);
        assert.match(note, /24px/);
    });
});

describe("why the sweep could not see either of them", () => {
    // Three selectors: the bar, the header and the seats. Nothing else on the page had
    // ever been asked whether something was sitting on top of it.
    test("the occlusion check looks at every control now, not three groups", () => {
        const at = AUDIT.indexOf("occlusion(selector = null) {");
        assert.ok(at >= 0, "occlusion still hard-codes its own list");
        assert.match(AUDIT.slice(at, at + 200), /selector = selector \|\| this\.CONTROL_SELECTOR/);
    });

    // Widening it put three kinds of non-fault in front of the rule for the first time.
    test("a control that opted out of the pointer is not reported as covered", () => {
        const at = AUDIT.indexOf("occlusion(selector = null) {");
        const body = AUDIT.slice(at, AUDIT.indexOf("\n    },", at));
        assert.match(body, /getComputedStyle\(el\)\.pointerEvents === "none"/);
    });

    test("nor is one inside a disclosure nobody has opened", () => {
        const at = AUDIT.indexOf("occlusion(selector = null) {");
        const body = AUDIT.slice(at, AUDIT.indexOf("\n    },", at));
        assert.match(body, /el\.checkVisibility/,
            "a shut <details> still hands out a real rect, and a size check lets it through");
    });

    test("and flow content under a fixed layer is said rather than failed", () => {
        const at = AUDIT.indexOf("occlusion(selector = null) {");
        const body = AUDIT.slice(at, AUDIT.indexOf("\n    },", at));
        assert.match(body, /scrolls clear of it/);
    });
});

describe("the rest of what the sweep had never run", () => {
    // It opened five sheets and asked one question of them.
    test("an overlay gets the whole audit, not the occlusion check alone", () => {
        const at = DRIVER.indexOf("for (const [name, open] of OVERLAYS) {");
        assert.ok(at >= 0);
        const body = DRIVER.slice(at, DRIVER.indexOf("record(`${name}", at));
        assert.match(body, /LayoutAudit\.runAll\(/);
        assert.ok(!/return LayoutAudit\.occlusion\(/.test(body),
            "the overlay pass still runs one rule");
    });

    // Two of the rules that made running only one of them reasonable ask about the
    // fixed bar, which is not a question while a scrim is covering the page.
    test("the two questions about the fixed bar stand down while a sheet is open", () => {
        ["focusHasRoom() {", "furnitureBudget() {"].forEach(signature => {
            const at = AUDIT.indexOf(signature);
            assert.ok(at >= 0, `there is no \`${signature}\``);
            const body = AUDIT.slice(at, AUDIT.indexOf("\n    },", at));
            assert.match(body, /if \(this\.modalScope\(\)\) \{/,
                `${signature} still reads a full-screen scrim as furniture`);
        });
    });

    // And the third called the bottom four rows of a sheet that scrolls unreachable.
    test("a dialog's buttons below the fold are only a fault if nothing scrolls to them", () => {
        const at = AUDIT.indexOf("dialogActionsReachable() {");
        const body = AUDIT.slice(at, AUDIT.indexOf("\n    },", at));
        assert.match(body, /if \(this\.reachableByScrolling\(button\)\) return;/);
    });

    // The helper all three of those lean on had a blind spot of its own: it asked
    // whether the element had left the box entirely, which is true of something well
    // below the fold and false of something hanging eight pixels over the edge.
    test("and reachability counts a control that is only part-way out", () => {
        const at = AUDIT.indexOf("reachableByScrolling(el) {");
        const body = AUDIT.slice(at, AUDIT.indexOf("\n    },", at));
        assert.match(body, /const below = rect\.bottom - box\.bottom/);
        assert.match(body, /const above = box\.top - rect\.top/);
        // The comment above the fix quotes the old test, so the code is read on its own.
        const code = body.split("\n").filter(line => !/^\s*\/\//.test(line)).join("\n");
        assert.ok(!/rect\.top >= box\.bottom/.test(code),
            "it still asks whether the element has left the box entirely");
    });
});

describe("two controls that were a glyph and nothing else", () => {
    test("the pot wizard's close is named for what leaving does", () => {
        const markup = fs.readFileSync(path.join(ROOT, "Pages", "Casino", "TexasHoldem.cshtml"), "utf8");
        const at = markup.indexOf('id="closePotWizardBtn"');
        assert.ok(at >= 0);
        assert.match(markup.slice(at, markup.indexOf(">", at)), /aria-label="Close without paying the pot"/);
    });

    // Named from the label the dealer typed, and kept up with it — the same shape the
    // chip legend's remove button already used, in a column of identical crosses.
    test("and a custom field's remove says which field", () => {
        const render = src("render");
        const at = render.indexOf("renderCustomFields(form, player, index) {");
        const body = render.slice(at, render.indexOf("\n    },", at));
        assert.match(body, /removeBtn\.setAttribute\("aria-label"/);
        assert.match(body, /labelInput\.value\.trim\(\)/);
        assert.match(body, /nameRemove\(\);/);
    });
});