import type { Page, TestInfo } from "@playwright/test";

import { mockDay } from "./setup/day-mock";
import { expect, test } from "./setup/test";
import { MOBILE_ROUTES_STORAGE_STATE_PATH } from "./setup/global-setup";
import { MOBILE_ROUTES_ANALYTE } from "./setup/mobile-routes-fixture";

/**
 * v1.42 — the day view and its doors.
 *
 * The record is the phone-sweep account `globalSetup` seeds: a week of blood
 * pressure, two lab readings, mood and an episode. The day itself
 * (`GET /api/day/{date}`, `GET /api/day/index`) is answered by a route mock in
 * the contract's shape, so the journeys pin the client: which door opens which
 * day, what the history does, and where no door is.
 *
 *   - a chart point opens the day beside the chart (desktop);
 *   - on a touch screen the first tap shows the value and the tooltip offers
 *     the day, the second opens it as a bottom sheet;
 *   - a date in a list opens the day while the row keeps its own target;
 *   - `?day=` opens the layer on any page, Back and Escape close it, a date in
 *     the future is dropped;
 *   - stepping to the neighbouring days never adds history entries;
 *   - docked, the day folds to its strip, which runs the full height of the
 *     window right of the top bar, is the panel's only open and close
 *     control and brings the day back on any page; the search magnifier at
 *     the end of the top bar is never covered by it; a sheet closes for good
 *     from its close button;
 *   - the dashboard's today area offers no door; its charts below do.
 *
 * Stable data attributes only: `day-panel` (+ `data-shell`), `day-link`,
 * the header's `day-date-button` and its `day-date-picker` (days keyed by
 * `data-date-key`, dotted by `data-entries`, and `day-date-today`),
 * `chart-plot[data-day-links]`, `chart-tooltip-open-day`, `day-prev` /
 * `day-next` / `day-close`, and the docked day's strip `day-strip`
 * (+ `data-day`, `data-state`) with its `day-strip-toggle`.
 */

const panel = (page: Page) => page.locator('[data-slot="day-panel"]');

async function shot(page: Page, testInfo: TestInfo, name: string) {
  const path = testInfo.outputPath(`${name}.png`);
  await page.screenshot({ path });
  await testInfo.attach(name, { path, contentType: "image/png" });
  const dir = process.env.DAY_SHOTS_DIR;
  if (dir) {
    await page.screenshot({
      path: `${dir}/${name}-${testInfo.project.name}.png`,
    });
  }
}

function isoDaysAgo(days: number): string {
  const d = new Date(Date.now() - days * 86_400_000);
  return d.toISOString().slice(0, 10);
}

test.describe("the day view", () => {
  test.use({ storageState: MOBILE_ROUTES_STORAGE_STATE_PATH });

  test.beforeEach(async ({ page, context }, testInfo) => {
    const baseURL = testInfo.project.use.baseURL ?? "http://localhost:3000";
    await context.addCookies([
      { name: "healthlog-locale", value: "en", url: baseURL },
    ]);
    await mockDay(page);
  });

  test("a chart point opens its day beside the chart; Back closes it", async ({
    page,
  }, testInfo) => {
    test.skip(testInfo.project.name !== "chromium-desktop", "desktop click");
    await page.setViewportSize({ width: 1440, height: 900 });
    await page.goto("/insights/blood-pressure");
    const plot = page.locator(
      '[data-slot="chart-plot"][data-day-links="true"]',
    );
    await expect(plot).toBeVisible();
    // The plot's right half holds the most recent points.
    const box = (await plot.boundingBox())!;
    await page.mouse.move(box.x + box.width * 0.8, box.y + box.height / 2);
    await page.mouse.click(box.x + box.width * 0.8, box.y + box.height / 2);

    await expect(panel(page)).toBeVisible();
    await expect(panel(page)).toHaveAttribute("data-shell", "docked");
    // A landmark beside the page, named by its date.
    await expect(panel(page)).toHaveJSProperty("tagName", "ASIDE");
    await expect(page).toHaveURL(/[?&]day=\d{4}-\d{2}-\d{2}/);
    await expect(page.locator('[data-slot="day-focus"]')).toBeVisible();
    // The chart beside it stays usable: the panel is not modal.
    await expect(page.locator('[data-slot="sheet-overlay"]')).toHaveCount(0);

    await page.goBack();
    await expect(panel(page)).toHaveCount(0);
    await expect(page).not.toHaveURL(/[?&]day=/);
  });

  test("a date in a list opens the day; the row keeps its own target", async ({
    page,
  }) => {
    await page.goto("/labs");
    await page
      .locator('[data-slot="lab-list-analyte"]')
      .filter({ hasText: MOBILE_ROUTES_ANALYTE })
      .first()
      .click();
    // The marker's readings, each dated.
    await page.locator('a[href$="/values"]').first().click();
    const link = page.locator('[data-slot="day-link"]:visible').first();
    await expect(link).toBeVisible();
    const day = await link.getAttribute("data-day");
    const before = page.url();
    await link.click();
    await expect(panel(page)).toBeVisible();
    await expect(page.locator('[data-slot="day-view"]')).toHaveAttribute(
      "data-day",
      day!,
    );
    // Same page underneath: the click opened the day, not the reading.
    expect(new URL(page.url()).pathname).toBe(new URL(before).pathname);
    // The reading the person came from sits on top, with the one before it.
    await expect(page.locator('[data-slot="day-focus"]')).toBeVisible();
  });

  test("?day= opens the layer on any page; Escape closes it", async ({
    page,
  }) => {
    const day = isoDaysAgo(3);
    await page.goto(`/mood?day=${day}`);
    await expect(panel(page)).toBeVisible();
    await expect(page.locator('[data-slot="day-view"]')).toHaveAttribute(
      "data-day",
      day,
    );
    await page.keyboard.press("Escape");
    await expect(panel(page)).toHaveCount(0);
    await expect(page).toHaveURL(/\/mood$/);
  });

  test("the day's scores sit below its values, each opening its own page", async ({
    page,
  }) => {
    await page.goto(`/mood?day=${isoDaysAgo(3)}`);
    await expect(panel(page)).toBeVisible();
    const scores = page.locator('[data-slot="day-scores"]');
    await expect(scores).toBeVisible();
    const tiles = scores.locator('[data-slot="day-score"]');
    await expect(tiles).toHaveCount(2);
    await expect(
      scores.locator('[data-slot="day-score"][data-score="healthScore"]'),
    ).toHaveAttribute("href", "/insights/health-score");
    await expect(
      scores.locator('[data-slot="day-score"][data-score="strain"]'),
    ).toHaveAttribute("href", "/insights/scores/strain");
    // A score the day does not hold has no tile.
    await expect(
      scores.locator('[data-slot="day-score"][data-score="readiness"]'),
    ).toHaveCount(0);
    // Below the values, above what happened.
    const order = await page
      .locator(
        '[data-slot="day-values"], [data-slot="day-scores"], [data-slot="day-events"]',
      )
      .evaluateAll((nodes) =>
        nodes.map((node) => node.getAttribute("data-slot")),
      );
    expect(order).toEqual(["day-values", "day-scores", "day-events"]);
  });

  test("the docked day folds beside its strip and comes back on another page", async ({
    page,
  }, testInfo) => {
    test.skip(
      testInfo.project.name !== "chromium-desktop",
      "docked from 1280 px",
    );
    const day = isoDaysAgo(3);
    await page.goto(`/mood?day=${day}`);
    await expect(panel(page)).toHaveAttribute("data-shell", "docked");

    // Docked, the header has no fold button: the strip is the toggle.
    await expect(page.locator('[data-slot="day-close"]')).toHaveCount(0);
    const rail = page.locator('[data-slot="day-strip"]');
    const expand = page.locator('[data-slot="day-strip-toggle"]');
    await expect(expand).toHaveAttribute("aria-expanded", "true");
    await expand.click();
    await expect(panel(page)).toHaveCount(0);
    await expect(page).toHaveURL(/\/mood$/);
    // The strip stays, holding the day, and focus waits on it.
    await expect(rail).toHaveAttribute("data-day", day);
    await expect(rail).toHaveAttribute("data-state", "closed");
    await expect(expand).toBeFocused();
    await expect(expand).toHaveAttribute("aria-expanded", "false");
    await expect(expand).toHaveAttribute("aria-controls", "day-docked-panel");
    // Named by its visible date (WCAG 2.5.3); the action is the tooltip.
    expect(await expand.getAttribute("aria-label")).toBeNull();
    expect(await expand.getAttribute("title")).toMatch(/^Show /);
    expect((await rail.boundingBox())!.width).toBeLessThanOrEqual(40);

    // Another page: the edge is still there and brings the same day back,
    // from the keyboard too.
    await page.goto("/labs");
    await expect(rail).toHaveAttribute("data-day", day);
    await expand.focus();
    await page.keyboard.press("Enter");
    await expect(panel(page)).toHaveAttribute("data-shell", "docked");
    await expect(page.locator('[data-slot="day-view"]')).toHaveAttribute(
      "data-day",
      day,
    );
    await expect(page).toHaveURL(new RegExp(`/labs\\?day=${day}$`));
    await expect(panel(page).locator("h2").first()).toBeFocused();
    // Open, the strip stays where it was and says so.
    await expect(rail).toHaveAttribute("data-state", "open");
    await expect(expand).toHaveAttribute("aria-expanded", "true");
  });

  test("the date opens a calendar; a picked day opens, Today goes to today", async ({
    page,
  }, testInfo) => {
    const desktop = testInfo.project.name === "chromium-desktop";
    // The days of the month that hold anything carry a dot.
    await mockDay(page, { index: "full" });
    const day = isoDaysAgo(5);
    await page.goto(`/mood?day=${day}`);
    await expect(panel(page)).toHaveAttribute(
      "data-shell",
      desktop ? "docked" : "bottom",
    );
    const date = panel(page).locator('[data-slot="day-date-button"]');
    const picker = page.locator('[data-slot="day-date-picker"]');
    // The date stays one line in the header, the arrows beside it.
    await expect(date).toHaveAttribute("aria-expanded", "false");
    await expect(panel(page).locator('[data-slot="day-prev"]')).toBeVisible();
    await shot(page, testInfo, "day-date-closed");

    await date.click();
    await expect(picker).toBeVisible();
    await expect(date).toHaveAttribute("aria-expanded", "true");
    await expect(picker.locator(`[data-date-key="${day}"]`)).toHaveAttribute(
      "data-selected-single",
      "true",
    );
    await expect(picker.locator('[data-entries="true"]').first()).toBeVisible();
    // Nothing past today can be picked.
    const tomorrow = picker.locator(`[data-date-key="${isoDaysAgo(-2)}"]`);
    if ((await tomorrow.count()) > 0) await expect(tomorrow).toBeDisabled();
    await shot(page, testInfo, "day-date-open");

    // Another day of the same month: the 1st, or the 2nd when the open day
    // is the 1st itself.
    const first = `${day.slice(0, 8)}01`;
    const target = first === day ? isoDaysAgo(4) : first;
    const start = await page.evaluate(() => window.history.length);
    await picker.locator(`[data-date-key="${target}"]`).click();
    await expect(picker).toHaveCount(0);
    await expect(page.locator('[data-slot="day-view"]')).toHaveAttribute(
      "data-day",
      target,
    );
    await expect(page).toHaveURL(new RegExp(`[?&]day=${target}`));
    // Like a step: no new history entry, and focus back on the date.
    expect(await page.evaluate(() => window.history.length)).toBe(start);
    await expect(date).toBeFocused();

    // The keyboard: Enter opens, Escape closes the calendar only.
    await page.keyboard.press("Enter");
    await expect(picker).toBeVisible();
    // The calendar has the keyboard before Escape is pressed.
    await expect
      .poll(() =>
        page.evaluate(
          () =>
            document.activeElement?.closest(
              '[role="dialog"]:not([data-slot="day-panel"])',
            ) != null,
        ),
      )
      .toBe(true);
    // On a phone the calendar is a sheet over the day's own sheet. Focus
    // arrives before Radix has handed it the Escape key: in between, the day
    // underneath still holds it. The handover shows as the day's layer
    // turning inert (`pointer-events: none`) once the calendar is the top
    // layer; wait for that, not for a fixed time. The docked column is no
    // dialog and has no such handover.
    if (!desktop)
      await expect
        .poll(() =>
          panel(page).evaluate(
            (el) =>
              new Promise<string>((resolve) =>
                requestAnimationFrame(() =>
                  setTimeout(() => resolve(getComputedStyle(el).pointerEvents)),
                ),
              ),
          ),
        )
        .toBe("none");
    await page.keyboard.press("Escape");
    await expect(picker).toHaveCount(0);
    await expect(panel(page)).toBeVisible();
    await expect(date).toBeFocused();

    // Today.
    await page.keyboard.press("Space");
    await expect(picker).toBeVisible();
    await picker.locator('[data-slot="day-date-today"]').click();
    await expect(picker).toHaveCount(0);
    await expect(panel(page).locator('[data-slot="day-next"]')).toBeDisabled();
  });

  test("a sheet closes for good and leaves no strip behind", async ({
    page,
  }, testInfo) => {
    const desktop = testInfo.project.name === "chromium-desktop";
    // Below 1280 px the day is a sheet from the right; on a phone, from the
    // bottom. Neither collapses.
    if (desktop) await page.setViewportSize({ width: 1024, height: 800 });
    const day = isoDaysAgo(3);
    await page.goto(`/mood?day=${day}`);
    await expect(panel(page)).toHaveAttribute(
      "data-shell",
      desktop ? "sheet" : "bottom",
    );
    await expect(page.locator('[data-slot="day-close"]')).toHaveAttribute(
      "aria-label",
      "Close day",
    );
    await page.locator('[data-slot="day-close"]').click();
    await expect(panel(page)).toHaveCount(0);
    await expect(page).toHaveURL(/\/mood$/);
    await expect(page.locator('[data-slot="day-strip"]')).toHaveCount(0);
  });

  test("beside the docked day, every blood-pressure value keeps its unit on its line", async ({
    page,
  }, testInfo) => {
    test.skip(
      testInfo.project.name !== "chromium-desktop",
      "docked from 1280 px",
    );
    // The narrowest docked width: each half of the stat card is narrowest
    // here. Four cells a row left "1xx mmHg" no room, so the systolic values
    // broke onto two lines while the two-digit diastolic ones fitted.
    await page.setViewportSize({ width: 1280, height: 900 });
    await page.goto(`/insights/blood-pressure?day=${isoDaysAgo(3)}`);
    await expect(panel(page)).toHaveAttribute("data-shell", "docked");
    const values = page.locator(
      '[data-slot="metric-stat-series"] [data-slot="metric-stat"] > p:nth-child(2)',
    );
    await expect(values).toHaveCount(8);
    const cells = await values.evaluateAll((els) =>
      els.map((el) => {
        const lineHeight = parseFloat(getComputedStyle(el).lineHeight);
        return {
          text: el.textContent ?? "",
          lines: Math.round(el.getBoundingClientRect().height / lineHeight),
          overflow: el.scrollWidth - el.clientWidth,
        };
      }),
    );
    for (const cell of cells) {
      expect(cell.text, cell.text).toMatch(/mmHg$/);
      expect(cell.lines, cell.text).toBe(1);
      expect(cell.overflow, cell.text).toBeLessThanOrEqual(0);
    }
  });

  test("the strip runs the full height; the search magnifier stays clear of it", async ({
    page,
  }, testInfo) => {
    test.skip(
      testInfo.project.name !== "chromium-desktop",
      "docked from 1280 px",
    );
    const day = isoDaysAgo(3);
    const strip = page.locator('[data-slot="day-strip"]');
    const search = page.locator('[data-slot="command-palette-trigger"]');
    const topBar = page.locator('[data-slot="top-bar"]');
    for (const width of [1280, 1440, 1920]) {
      await page.setViewportSize({ width, height: 900 });
      for (const url of ["/mood", `/mood?day=${day}`]) {
        await page.goto(url);
        await expect(strip).toBeVisible();
        if (url.includes("day=")) {
          await expect(panel(page)).toHaveAttribute("data-shell", "docked");
          // The open panel runs the full height beside its strip.
          await expect
            .poll(async () => (await panel(page).boundingBox())?.width)
            .toBeGreaterThan(400);
          const p = (await panel(page).boundingBox())!;
          expect(p.y).toBe(0);
          expect(Math.round(p.y + p.height)).toBe(900);
        }
        const s = (await strip.boundingBox())!;
        // Top edge at the very top of the window, down to the bottom.
        expect(s.y).toBe(0);
        expect(Math.round(s.height)).toBe(900);
        expect(Math.round(s.x + s.width)).toBe(width);
        // The top bar ends left of the strips, so the magnifier sits fully
        // inside it, in front of them.
        const bar = (await topBar.boundingBox())!;
        expect(bar.x + bar.width).toBeLessThanOrEqual(s.x + 0.5);
        await expect(search).toBeVisible();
        const m = (await search.boundingBox())!;
        expect(m.x).toBeGreaterThanOrEqual(0);
        expect(m.y).toBeGreaterThanOrEqual(0);
        expect(m.x + m.width).toBeLessThanOrEqual(s.x);
        expect(m.y + m.height).toBeLessThanOrEqual(bar.y + bar.height);
        // Nothing paints over its centre: the hit test lands on it.
        const hit = await page.evaluate(
          ([x, y]) =>
            document
              .elementFromPoint(x, y)
              ?.closest('[data-slot="command-palette-trigger"]') != null,
          [m.x + m.width / 2, m.y + m.height / 2],
        );
        expect(hit).toBe(true);
        // No horizontal scroll anywhere on the page.
        const overflow = await page.evaluate(
          () =>
            document.documentElement.scrollWidth -
            document.documentElement.clientWidth,
        );
        expect(overflow).toBeLessThanOrEqual(0);
      }
    }
  });

  test("a future or malformed ?day= is dropped without a word", async ({
    page,
  }) => {
    await page.goto("/mood?day=2999-01-01");
    await expect(page).toHaveURL(/\/mood$/);
    await expect(panel(page)).toHaveCount(0);
    await page.goto("/mood?day=2026-02-30");
    await expect(page).toHaveURL(/\/mood$/);
    await expect(panel(page)).toHaveCount(0);
  });

  test("stepping between days never adds a history entry", async ({ page }) => {
    await page.goto("/mood");
    await page.locator('[data-slot="day-link"]:visible').first().click();
    await expect(panel(page)).toBeVisible();
    const start = await page.evaluate(() => window.history.length);
    const first = await page
      .locator('[data-slot="day-view"]')
      .getAttribute("data-day");
    for (let i = 0; i < 3; i += 1) {
      await page.locator('[data-slot="day-prev"]').click();
    }
    await expect(page.locator('[data-slot="day-view"]')).not.toHaveAttribute(
      "data-day",
      first!,
    );
    expect(await page.evaluate(() => window.history.length)).toBe(start);
    // One Back leaves the layer, however far it stepped.
    await page.goBack();
    await expect(panel(page)).toHaveCount(0);
    await expect(page).toHaveURL(/\/mood$/);
  });

  test("on a phone the first tap shows the value, the second opens the day", async ({
    page,
  }, testInfo) => {
    test.skip(testInfo.project.name !== "chromium-mobile", "touch only");
    await page.goto("/insights/blood-pressure");
    const plot = page.locator(
      '[data-slot="chart-plot"][data-day-links="true"]',
    );
    await plot.scrollIntoViewIfNeeded();
    await expect(plot).toBeVisible();
    const box = (await plot.boundingBox())!;
    await page.touchscreen.tap(box.x + box.width * 0.8, box.y + box.height / 2);
    const open = page.locator('[data-slot="chart-tooltip-open-day"]');
    await expect(open).toBeVisible();
    // A tap alone never opens a sheet.
    await expect(panel(page)).toHaveCount(0);
    await open.tap();
    await expect(panel(page)).toBeVisible();
    await expect(panel(page)).toHaveAttribute("data-shell", "bottom");
    // The tapped value heads the day.
    await expect(page.locator('[data-slot="day-focus"]')).toBeVisible();
  });

  test("the dashboard's today area offers no day door", async ({ page }) => {
    await page.goto("/");
    await expect(
      page.locator('[data-slot="main-content-wrapper"]'),
    ).toBeVisible();
    // The hero is today: nothing in it opens another day. (The charts
    // further down do; `day-doors.spec.ts` walks one.)
    await expect(
      page.locator('[data-slot^="today-hero"]').first(),
    ).toBeVisible();
    await expect(
      page.locator(
        '[data-slot^="today-hero"] [data-slot="day-link"], [data-slot^="today-hero"] [data-day-links="true"]',
      ),
    ).toHaveCount(0);
  });
});