import {
  fireEvent,
  render,
  screen,
  waitFor,
  within,
} from "@testing-library/react";
import { beforeEach, describe, expect, it, vi } from "vitest";
import type {
  SleepEntry,
  SleepEntryInput,
  SleepMedication,
  SleepSnapshot,
} from "../api/sleepDiary";
import { SleepDiaryWorkspace } from "./SleepDiaryWorkspace";

const api = vi.hoisted(() => ({
  deleteSleepEntry: vi.fn(),
  fetchSleepDiary: vi.fn(),
  fetchSleepMedications: vi.fn(),
  saveSleepEntry: vi.fn(),
  saveSleepMedication: vi.fn(),
  validateSleepEntry: vi.fn(),
  nextId: 0,
}));

vi.mock("../api/sleepDiary", async (importOriginal) => {
  const original = await importOriginal<typeof import("../api/sleepDiary")>();
  return {
    ...original,
    deleteSleepEntry: api.deleteSleepEntry,
    fetchSleepDiary: api.fetchSleepDiary,
    fetchSleepMedications: api.fetchSleepMedications,
    saveSleepEntry: api.saveSleepEntry,
    saveSleepMedication: api.saveSleepMedication,
    validateSleepEntry: api.validateSleepEntry,
    newSleepId: (prefix: "sle" | "mdi") =>
      `${prefix}_00000000-0000-4000-8000-${String(++api.nextId).padStart(12, "0")}`,
  };
});

const emptySnapshot: SleepSnapshot = {
  api_version: 1,
  entries: [],
  summary: {
    nights: 0,
    long_awake_count: 0,
    nap_count: 0,
    sleepiness_count: 0,
    intake_count: 0,
    sleep_duration_seconds: 0,
    long_awake_duration_seconds: 0,
    nap_duration_seconds: 0,
    average_bed_minute: null,
    average_get_up_minute: null,
  },
};

const medication: SleepMedication = {
  medication_id: "med_00000000-0000-4000-8000-000000000001",
  revision_id: "mr_00000000-0000-4000-8000-000000000001",
  name: "TestMed",
  default_dose_value: 5,
  default_dose_unit: "mg",
  form: "",
  note: "",
  active: true,
};

const snapshotWith = (entries: SleepEntry[]): SleepSnapshot => {
  const duration = (start: string, end: string | null) =>
    end === null ? 0 : (Date.parse(end) - Date.parse(start)) / 1000;
  const events = entries.flatMap((entry) => entry.events);
  const selected = (type: string) =>
    events.filter((event) => event.type === type);
  return {
    api_version: 1,
    entries,
    summary: {
      nights: entries.length,
      long_awake_count: selected("long_awake").length,
      nap_count: selected("nap").length,
      sleepiness_count: selected("daytime_sleepiness").length,
      intake_count: entries.reduce(
        (total, entry) => total + entry.intakes.length,
        0,
      ),
      sleep_duration_seconds: selected("sleep").reduce(
        (total, event) => total + duration(event.start_at, event.end_at),
        0,
      ),
      long_awake_duration_seconds: selected("long_awake").reduce(
        (total, event) => total + duration(event.start_at, event.end_at),
        0,
      ),
      nap_duration_seconds: selected("nap").reduce(
        (total, event) => total + duration(event.start_at, event.end_at),
        0,
      ),
      average_bed_minute: null,
      average_get_up_minute: null,
    },
  };
};

const persistedEntry = (
  input: SleepEntryInput,
  entryId: string,
  revisionId: string,
): SleepEntry => ({
  ...input,
  entry_id: entryId,
  revision_id: revisionId,
  publication_status: "draft",
  events: input.events.map((event) => ({ ...event })),
  intakes: input.intakes.map((intake) => ({ ...intake })),
});

describe("SleepDiaryWorkspace", () => {
  beforeEach(() => {
    vi.clearAllMocks();
    api.nextId = 0;
    api.fetchSleepDiary.mockResolvedValue(emptySnapshot);
    api.fetchSleepMedications.mockResolvedValue([]);
    let revision = 0;
    api.saveSleepEntry.mockImplementation(async (input) => ({
      entry_id: input.entry_id || "sd_00000000-0000-4000-8000-000000000001",
      revision_id: `sdr_00000000-0000-4000-8000-${String(++revision).padStart(12, "0")}`,
    }));
  });

  it.each([
    ["bed_time", "Mise au lit", "22:30", null],
    ["sleep", "Sommeil", "23:00", "06:30"],
    ["long_awake", "Long réveil", "03:00", "03:30"],
    ["final_get_up", "Lever", "07:00", null],
    ["nap", "Sieste", "14:00", "14:30"],
    ["daytime_sleepiness", "Somnolence", "15:00", null],
  ])(
    "keeps the workspace mounted after adding %s and advances the same entry revision",
    async (type, label, start, end) => {
      render(<SleepDiaryWorkspace period="30d" language="fr" />);
      await screen.findByTestId("sleep-workspace");
      fireEvent.change(screen.getByTestId("sleep-event-type"), {
        target: { value: type },
      });
      fireEvent.change(screen.getByTestId("sleep-event-start"), {
        target: { value: start },
      });
      if (end !== null)
        fireEvent.change(screen.getByTestId("sleep-event-end"), {
          target: { value: end },
        });
      fireEvent.click(screen.getByTestId("sleep-add-event"));

      expect(
        await screen.findByTestId(`sleep-event-${type}`),
      ).toHaveTextContent(label);
      expect(screen.getByTestId("sleep-workspace")).toBeInTheDocument();
      expect(screen.getByTestId("sleep-add-event")).toBeEnabled();
      await waitFor(() => expect(api.saveSleepEntry).toHaveBeenCalledTimes(1));
      expect(api.saveSleepEntry.mock.calls[0][0]).toMatchObject({
        entry_id: "",
        expected_revision: null,
      });

      fireEvent.click(screen.getByTestId("sleep-add-event"));
      await waitFor(() => expect(api.saveSleepEntry).toHaveBeenCalledTimes(2));
      expect(api.saveSleepEntry.mock.calls[1][0]).toMatchObject({
        entry_id: "sd_00000000-0000-4000-8000-000000000001",
        expected_revision: "sdr_00000000-0000-4000-8000-000000000001",
      });
      expect(
        screen.queryByText("Impossible d’afficher cette section."),
      ).not.toBeInTheDocument();
    },
  );

  it("adds a medication, exposes it immediately for an intake, and supports edit and delete mutations", async () => {
    api.fetchSleepMedications
      .mockResolvedValueOnce([])
      .mockResolvedValue([medication]);
    render(<SleepDiaryWorkspace period="30d" language="fr" />);
    await screen.findByText("Aucun médicament enregistré.");

    fireEvent.click(
      screen.getByRole("button", { name: "+ Ajouter un médicament" }),
    );
    fireEvent.change(screen.getByTestId("sleep-medication-name"), {
      target: { value: "TestMed" },
    });
    fireEvent.change(screen.getByTestId("sleep-medication-dose"), {
      target: { value: "5" },
    });
    fireEvent.click(screen.getByTestId("sleep-add-medication"));

    const medicationList = await screen.findByTestId("sleep-medication-list");
    expect(within(medicationList).getByText("TestMed")).toBeInTheDocument();
    expect(screen.getByTestId("sleep-intake-medication")).toHaveTextContent(
      "TestMed",
    );
    fireEvent.change(screen.getByTestId("sleep-intake-medication"), {
      target: { value: medication.medication_id },
    });
    fireEvent.click(screen.getByTestId("sleep-add-intake"));
    const intake = await screen.findByTestId("sleep-intake-row");
    expect(intake).toHaveTextContent("TestMed");
    expect(screen.getByTestId("sleep-workspace")).toBeInTheDocument();

    fireEvent.change(within(intake).getByLabelText("Heure"), {
      target: { value: "22:15" },
    });
    await waitFor(() => expect(api.saveSleepEntry).toHaveBeenCalledTimes(2));
    fireEvent.click(
      within(intake).getByRole("button", { name: "Supprimer TestMed" }),
    );
    await waitFor(() => expect(api.saveSleepEntry).toHaveBeenCalledTimes(3));
    expect(screen.queryByTestId("sleep-intake-row")).not.toBeInTheDocument();
  });

  it("modifies and removes an event without losing the workspace", async () => {
    render(<SleepDiaryWorkspace period="30d" language="fr" />);
    await screen.findByTestId("sleep-workspace");
    fireEvent.change(screen.getByTestId("sleep-event-type"), {
      target: { value: "sleep" },
    });
    fireEvent.click(screen.getByTestId("sleep-add-event"));
    const row = await screen.findByTestId("sleep-event-sleep");
    fireEvent.change(within(row).getByLabelText("Début"), {
      target: { value: "23:00" },
    });
    fireEvent.click(within(row).getByRole("button", { name: "Modifier" }));
    fireEvent.click(
      within(row).getByRole("button", { name: "Supprimer Sommeil" }),
    );
    await waitFor(() =>
      expect(screen.queryByTestId("sleep-event-sleep")).not.toBeInTheDocument(),
    );
    expect(screen.getByTestId("sleep-workspace")).toBeInTheDocument();
    expect(screen.getByTestId("sleep-add-event")).toBeEnabled();
  });

  it("projects every persisted revision live and keeps distinct medication doses", async () => {
    let persisted: SleepEntry[] = [];
    let catalog: SleepMedication[] = [];
    let revision = 0;
    api.fetchSleepDiary.mockImplementation(async () => snapshotWith(persisted));
    api.fetchSleepMedications.mockImplementation(async () => catalog);
    api.saveSleepEntry.mockImplementation(async (input: SleepEntryInput) => {
      const entryId =
        input.entry_id || "sd_00000000-0000-4000-8000-000000000001";
      const revisionId = `sdr_00000000-0000-4000-8000-${String(++revision).padStart(12, "0")}`;
      persisted = [persistedEntry(input, entryId, revisionId)];
      return { entry_id: entryId, revision_id: revisionId };
    });
    api.saveSleepMedication.mockImplementation(async (input) => {
      const index = catalog.length + 1;
      const saved: SleepMedication = {
        ...input,
        medication_id: `med_00000000-0000-4000-8000-${String(index).padStart(12, "0")}`,
        revision_id: `mr_00000000-0000-4000-8000-${String(index).padStart(12, "0")}`,
      };
      catalog = [...catalog, saved];
      return {
        medication_id: saved.medication_id,
        revision_id: saved.revision_id,
      };
    });

    render(<SleepDiaryWorkspace period="30d" language="fr" />);
    await screen.findByText("Aucun médicament enregistré.");

    const addMedication = async (dose: string) => {
      fireEvent.click(
        screen.getByRole("button", { name: "+ Ajouter un médicament" }),
      );
      fireEvent.change(screen.getByTestId("sleep-medication-name"), {
        target: { value: "venlafaxine" },
      });
      fireEvent.change(screen.getByTestId("sleep-medication-dose"), {
        target: { value: dose },
      });
      fireEvent.click(screen.getByTestId("sleep-add-medication"));
      await waitFor(() =>
        expect(screen.queryByTestId("sleep-medication-name")).toBeNull(),
      );
    };
    await addMedication("75");
    await addMedication("37.5");

    const medicationSelect = screen.getByTestId("sleep-intake-medication");
    expect(medicationSelect).toHaveTextContent("venlafaxine — 75 mg");
    expect(medicationSelect).toHaveTextContent("venlafaxine — 37,5 mg");
    expect(screen.getAllByText("venlafaxine")).toHaveLength(2);

    const addIntake = async (medicationId: string, expectedDose: string) => {
      const calls = api.saveSleepEntry.mock.calls.length;
      fireEvent.change(medicationSelect, { target: { value: medicationId } });
      expect(screen.getByTestId("sleep-intake-dose")).toHaveValue(
        Number(expectedDose),
      );
      fireEvent.click(screen.getByTestId("sleep-add-intake"));
      await waitFor(() =>
        expect(api.saveSleepEntry).toHaveBeenCalledTimes(calls + 1),
      );
      await waitFor(() =>
        expect(screen.getByTestId("sleep-save-state")).toHaveTextContent(
          "Enregistré localement",
        ),
      );
    };
    await addIntake(catalog[0].medication_id, "75");
    await addIntake(catalog[1].medication_id, "37.5");
    expect(screen.getByTestId("sleep-agenda-medication")).toHaveTextContent(
      "M ×2",
    );
    expect(screen.getByTestId("sleep-agenda-medication")).toHaveAttribute(
      "title",
      expect.stringContaining("venlafaxine — 37,5 mg"),
    );

    const addEvent = async (type: string, start: string, end?: string) => {
      const calls = api.saveSleepEntry.mock.calls.length;
      fireEvent.change(screen.getByTestId("sleep-event-type"), {
        target: { value: type },
      });
      fireEvent.change(screen.getByTestId("sleep-event-start"), {
        target: { value: start },
      });
      if (end !== undefined)
        fireEvent.change(screen.getByTestId("sleep-event-end"), {
          target: { value: end },
        });
      fireEvent.click(screen.getByTestId("sleep-add-event"));
      await waitFor(() =>
        expect(api.saveSleepEntry).toHaveBeenCalledTimes(calls + 1),
      );
      await waitFor(() =>
        expect(screen.getByTestId("sleep-save-state")).toHaveTextContent(
          "Enregistré localement",
        ),
      );
    };
    await addEvent("bed_time", "22:45");
    expect(screen.getByTestId("sleep-agenda-bed-time")).toHaveTextContent(
      "22:45",
    );
    await addEvent("sleep", "23:15", "03:00");
    expect(screen.getByTestId("sleep-agenda-sleep-duration")).toHaveTextContent(
      "3 h 45 min",
    );
    await addEvent("long_awake", "03:00", "03:30");
    expect(screen.getByTestId("sleep-agenda-long-awake")).toHaveTextContent(
      "1 · 30 min",
    );
    await addEvent("sleep", "03:30", "06:45");
    expect(screen.getByTestId("sleep-agenda-sleep-duration")).toHaveTextContent(
      "7 h 00 min",
    );
    await addEvent("final_get_up", "07:10");
    expect(screen.getByTestId("sleep-agenda-final-get-up")).toHaveTextContent(
      "07:10",
    );
    expect(screen.getByTestId("sleep-agenda-time-in-bed")).toHaveTextContent(
      "8 h 25 min",
    );

    const getUpRow = screen.getByTestId("sleep-event-final_get_up");
    fireEvent.change(within(getUpRow).getByLabelText("Heure"), {
      target: { value: "07:30" },
    });
    await waitFor(() =>
      expect(screen.getByTestId("sleep-agenda-time-in-bed")).toHaveTextContent(
        "8 h 45 min",
      ),
    );

    const sleepRows = screen.getAllByTestId("sleep-event-sleep");
    fireEvent.change(within(sleepRows[1]).getByLabelText("Fin"), {
      target: { value: "07:00" },
    });
    await waitFor(() =>
      expect(
        screen.getByTestId("sleep-agenda-sleep-duration"),
      ).toHaveTextContent("7 h 15 min"),
    );

    fireEvent.click(
      within(screen.getByTestId("sleep-event-long_awake")).getByRole("button", {
        name: "Supprimer Long réveil",
      }),
    );
    await waitFor(() =>
      expect(screen.queryByTestId("sleep-agenda-long-awake")).toBeNull(),
    );
    expect(screen.queryByTestId("sleep-event-long_awake")).toBeNull();
    await addEvent("nap", "14:00", "14:35");
    expect(screen.getByTestId("sleep-agenda-naps")).toHaveTextContent(
      "1 · 35 min",
    );
    await addEvent("daytime_sleepiness", "15:00");
    expect(screen.getByTestId("sleep-agenda-sleepiness")).toHaveTextContent(
      "1 occurrence",
    );
    expect(screen.getByTestId("sleep-workspace")).toBeInTheDocument();
  });

  it("ignores a stale diary read that finishes after a newer persisted revision", async () => {
    let resolveInitial: ((value: SleepSnapshot) => void) | undefined;
    const initial = new Promise<SleepSnapshot>((resolve) => {
      resolveInitial = resolve;
    });
    let persisted: SleepEntry[] = [];
    api.fetchSleepDiary
      .mockImplementationOnce(async () => initial)
      .mockImplementation(async () => snapshotWith(persisted));
    api.saveSleepEntry.mockImplementation(async (input: SleepEntryInput) => {
      const result = {
        entry_id: "sd_00000000-0000-4000-8000-000000000001",
        revision_id: "sdr_00000000-0000-4000-8000-000000000099",
      };
      persisted = [persistedEntry(input, result.entry_id, result.revision_id)];
      return result;
    });

    render(<SleepDiaryWorkspace period="30d" language="fr" />);
    fireEvent.change(screen.getByTestId("sleep-event-type"), {
      target: { value: "bed_time" },
    });
    fireEvent.change(screen.getByTestId("sleep-event-start"), {
      target: { value: "22:45" },
    });
    fireEvent.click(screen.getByTestId("sleep-add-event"));
    expect(
      await screen.findByTestId("sleep-agenda-event-bed_time"),
    ).toBeInTheDocument();

    resolveInitial?.(emptySnapshot);
    await Promise.resolve();
    expect(screen.getByTestId("sleep-agenda-bed-time")).toHaveTextContent(
      "22:45",
    );
  });

  it("serializes autosaves so the next mutation uses the returned revision", async () => {
    let resolveFirst:
      ((value: { entry_id: string; revision_id: string }) => void) | undefined;
    let persisted: SleepEntry[] = [];
    const first = new Promise<{ entry_id: string; revision_id: string }>(
      (resolve) => {
        resolveFirst = resolve;
      },
    );
    api.fetchSleepDiary.mockImplementation(async () => snapshotWith(persisted));
    api.saveSleepEntry
      .mockImplementationOnce(async () => first)
      .mockImplementationOnce(async (input: SleepEntryInput) => {
        const result = {
          entry_id: input.entry_id,
          revision_id: "sdr_00000000-0000-4000-8000-000000000002",
        };
        persisted = [
          persistedEntry(input, result.entry_id, result.revision_id),
        ];
        return result;
      });

    render(<SleepDiaryWorkspace period="30d" language="fr" />);
    await screen.findByTestId("sleep-workspace");
    fireEvent.change(screen.getByTestId("sleep-event-type"), {
      target: { value: "bed_time" },
    });
    fireEvent.click(screen.getByTestId("sleep-add-event"));
    fireEvent.change(screen.getByTestId("sleep-event-type"), {
      target: { value: "sleep" },
    });
    fireEvent.click(screen.getByTestId("sleep-add-event"));
    await waitFor(() => expect(api.saveSleepEntry).toHaveBeenCalledTimes(1));
    expect(api.saveSleepEntry).toHaveBeenCalledTimes(1);

    const firstInput = api.saveSleepEntry.mock.calls[0][0] as SleepEntryInput;
    const firstResult = {
      entry_id: "sd_00000000-0000-4000-8000-000000000001",
      revision_id: "sdr_00000000-0000-4000-8000-000000000001",
    };
    persisted = [
      persistedEntry(firstInput, firstResult.entry_id, firstResult.revision_id),
    ];
    resolveFirst?.(firstResult);

    await waitFor(() => expect(api.saveSleepEntry).toHaveBeenCalledTimes(2));
    expect(api.saveSleepEntry.mock.calls[1][0]).toMatchObject({
      entry_id: firstResult.entry_id,
      expected_revision: firstResult.revision_id,
    });
    await waitFor(() =>
      expect(screen.getByTestId("sleep-save-state")).toHaveTextContent(
        "Enregistré localement",
      ),
    );
    expect(
      screen.getByTestId("sleep-agenda-event-bed_time"),
    ).toBeInTheDocument();
    expect(screen.getByTestId("sleep-agenda-event-sleep")).toBeInTheDocument();
  });
});