import { http, HttpResponse } from 'msw';
import { describe, expect, it } from 'vitest';
import { MASKED_SETTING_VALUE, type StorageAdminState, type StorageCategory, type StorageConfig } from '@trek/shared';
import { server } from '../../../helpers/msw/server';
import { fireEvent, render, screen, waitFor, within } from '../../../helpers/render';
import { ToastContainer } from '../../../../src/components/shared/Toast';
import MAdminStoragePanel from '../../../../src/mobile/screens/admin/MAdminStoragePanel';

function baseState(overrides: Partial<StorageAdminState> = {}): StorageAdminState {
  return {
    backends: [
      { name: 'uploads-local', type: 'local', source: 'built-in', options: { root: '/data/uploads' }, categories: ['files', 'journey', 'covers', 'avatars', 'photos-google', 'photos-trek'] },
      { name: 'backups-local', type: 'local', source: 'built-in', options: { root: '/data/backups' }, categories: ['backups'] },
      {
        name: 'off-box', type: 's3', source: 'settings',
        options: { endpoint: 'http://127.0.0.1:9000', bucket: 'trek', accessKeyId: 'ak', secretAccessKey: MASKED_SETTING_VALUE, region: 'us-east-1', keyPrefix: '', retries: 1, timeoutMs: 30000 },
        categories: [],
      },
    ],
    categories: {
      files: { backend: 'uploads-local', source: 'default' },
      journey: { backend: 'uploads-local', source: 'default' },
      covers: { backend: 'uploads-local', source: 'default' },
      avatars: { backend: 'uploads-local', source: 'default' },
      places: { backend: 'uploads-local', source: 'default' },
      'photos-google': { backend: 'uploads-local', source: 'default' },
      'photos-trek': { backend: 'uploads-local', source: 'default' },
      backups: { backend: 'backups-local', source: 'default' },
    },
    health: { replicaFailures: [] },
    seedFilePresent: false,
    usage: null,
    backfills: [],
    migrations: [],
    version: 0,
    ...overrides,
  };
}

function mirroredState(): StorageAdminState {
  const state = baseState();
  state.backends.push({
    name: 'mirror', type: 'mirror', source: 'settings',
    options: { primary: 'backups-local', replicas: ['off-box'] }, categories: ['backups'],
  });
  state.categories.backups = { backend: 'mirror', source: 'settings' };
  return state;
}

async function renderPanel(state: StorageAdminState = baseState()) {
  server.use(http.get('/api/admin/storage', () => HttpResponse.json(state)));
  render(
    <>
      <ToastContainer />
      <MAdminStoragePanel />
    </>,
  );
  await waitFor(() => expect(screen.getByText('Backends')).toBeInTheDocument());
}

describe('MAdminStoragePanel', () => {
  it('FE-MOB-MSTOR-001: renders every backend with type and source, env rows read-only', async () => {
    await renderPanel();
    const row = screen.getByTestId('m-storage-backend-off-box');
    expect(within(row).getByText('S3')).toBeInTheDocument();
    expect(within(row).getByText('Settings')).toBeInTheDocument();
    expect(screen.getByText('No replica failures recorded.')).toBeInTheDocument();
  });

  it('FE-MOB-MSTOR-002: reassigning a category via the picker sheet warns and saves through one PUT', async () => {
    let putBody: unknown;
    await renderPanel();
    server.use(
      http.put('/api/admin/storage', async ({ request }) => {
        putBody = await request.json();
        return HttpResponse.json(baseState());
      }),
    );
    fireEvent.click(within(screen.getByTestId('m-storage-category-files')).getByRole('button'));
    fireEvent.click(screen.getByRole('button', { name: 'off-box' })); // picker option; selecting closes
    expect(screen.getByText(/Existing objects do not move/)).toBeInTheDocument();
    fireEvent.click(screen.getByRole('button', { name: 'Save changes' }));
    // Usage was never scanned (baseState().usage === null) — the migrate
    // prompt fires; this test is about the picker + PUT shape, not the
    // prompt, so route new writes only (today's save behavior, unstripped).
    await screen.findByRole('alertdialog');
    fireEvent.click(screen.getByRole('button', { name: 'Just route new writes' }));
    await screen.findByText('Storage configuration saved');
    expect((putBody as { categories: Record<string, string> }).categories.files).toBe('off-box');
  });

  it('FE-MOB-MSTOR-003: a typed plaintext secret keeps Apply offered (no encryption-key gate)', async () => {
    await renderPanel();
    fireEvent.click(within(screen.getByTestId('m-storage-backend-off-box')).getByRole('button', { name: 'Edit' }));
    fireEvent.change(screen.getByPlaceholderText('us-east-1'), { target: { value: 'eu-west-1' } }); // sanity: form is open
    const secret = screen.getByDisplayValue(MASKED_SETTING_VALUE);
    fireEvent.change(secret, { target: { value: 'sk-new' } });
    expect(screen.getByRole('button', { name: 'Apply' })).toBeInTheDocument();
    expect(screen.queryByRole('alert')).not.toBeInTheDocument();
  });

  it('FE-MOB-MSTOR-004: a 400 renders the server message verbatim', async () => {
    await renderPanel();
    server.use(http.put('/api/admin/storage', () => HttpResponse.json({ error: 'registry says no' }, { status: 400 })));
    fireEvent.click(within(screen.getByTestId('m-storage-category-files')).getByRole('button'));
    fireEvent.click(screen.getByRole('button', { name: 'off-box' }));
    fireEvent.click(screen.getByRole('button', { name: 'Save changes' }));
    // Usage was never scanned — the migrate prompt fires first; route new
    // writes only, matching this test's focus on the save-error rendering.
    await screen.findByRole('alertdialog');
    fireEvent.click(screen.getByRole('button', { name: 'Just route new writes' }));
    expect(await screen.findByText('registry says no')).toBeInTheDocument();
  });

  it('FE-MOB-MSTOR-005: renaming onto another existing backend warns and blocks Apply', async () => {
    await renderPanel();
    fireEvent.click(within(screen.getByTestId('m-storage-backend-off-box')).getByRole('button', { name: 'Edit' }));
    const nameInput = screen.getByDisplayValue('off-box');
    fireEvent.change(nameInput, { target: { value: 'uploads-local' } });
    expect(screen.getByText(/A backend named uploads-local already exists/)).toBeInTheDocument();
    expect(screen.getByRole('button', { name: 'Apply' })).toBeDisabled();
  });

  it('FE-MOB-MSTOR-006: mirrors fold — no mirror card, primary and replica decorated', async () => {
    await renderPanel(mirroredState());
    expect(screen.queryByTestId('m-storage-backend-mirror')).not.toBeInTheDocument();
    const primary = screen.getByTestId('m-storage-backend-backups-local');
    expect(within(primary).getByText('Mirrored to: off-box')).toBeInTheDocument();
    const replica = screen.getByTestId('m-storage-backend-off-box');
    expect(within(replica).getByText('Replica of: backups-local')).toBeInTheDocument();
  });

  it('FE-MOB-MSTOR-007: toggling a target on a primary synthesizes the mirror in the PUT', async () => {
    let putBody: unknown;
    await renderPanel();
    server.use(
      http.put('/api/admin/storage', async ({ request }) => {
        putBody = await request.json();
        return HttpResponse.json(baseState());
      }),
    );
    fireEvent.click(within(screen.getByTestId('m-storage-backend-backups-local')).getByRole('button', { name: 'Edit' }));
    fireEvent.click(screen.getByRole('switch', { name: 'off-box' }));
    expect(screen.getByText(/slows every upload/)).toBeInTheDocument();
    fireEvent.click(screen.getByRole('button', { name: 'Apply' }));
    fireEvent.click(screen.getByRole('button', { name: 'Save changes' }));
    await screen.findByText('Storage configuration saved');
    const body = putBody as { backends: Array<{ name: string; type: string; options: unknown }>; categories: Record<string, string> };
    expect(body.backends.find((b) => b.name === 'backups-local-mirror')!.options).toEqual({
      primary: 'backups-local', replicas: ['off-box'],
    });
    expect(body.categories.backups).toBe('backups-local-mirror');
  });

  it('FE-MOB-MSTOR-008: the category picker deals in primaries and warns on cache categories', async () => {
    let putBody: unknown;
    await renderPanel(mirroredState());
    server.use(
      http.put('/api/admin/storage', async ({ request }) => {
        putBody = await request.json();
        return HttpResponse.json(mirroredState());
      }),
    );
    fireEvent.click(within(screen.getByTestId('m-storage-category-places')).getByRole('button'));
    fireEvent.click(within(screen.getByRole('dialog', { name: 'Place images' })).getByRole('button', { name: 'backups-local' })); // picker option = primary name
    // getByText(/re-fetchable/) is now ambiguous — the photos-google/photos-trek category
    // descriptions also say "re-fetchable". The cache warning is the only role="note" on
    // screen here (the mirror-targets latency note only renders while a form is open).
    expect(screen.getByRole('note')).toHaveTextContent(/re-fetchable/);
    fireEvent.click(screen.getByRole('button', { name: 'Save changes' }));
    // Usage was never scanned — the migrate prompt fires first; route new
    // writes only, matching this test's focus on the picker/cache-warning.
    await screen.findByRole('alertdialog');
    fireEvent.click(screen.getByRole('button', { name: 'Just route new writes' }));
    await screen.findByText('Storage configuration saved');
    expect((putBody as { categories: Record<string, string> }).categories.places).toBe('mirror');
  });

  it('FE-MOB-MSTOR-009: category rows show display name, id badge and description; photos is gone', async () => {
    await renderPanel();
    const files = screen.getByTestId('m-storage-category-files');
    // The testid wraps only the select row — assert name/badge/description through the field around it.
    expect(screen.getByText('Trip documents')).toBeInTheDocument();
    expect(screen.getByText('files')).toBeInTheDocument();
    expect(screen.getByText(/tickets, PDFs, booking confirmations/)).toBeInTheDocument();
    expect(within(files).getByRole('button')).toBeInTheDocument(); // row still tappable
    expect(screen.queryByTestId('m-storage-category-photos')).not.toBeInTheDocument();
  });

  it('FE-MOB-MSTOR-010: usage renders on rows and the header; never-computed shows the compute prompt', async () => {
    const usage = {
      computedAt: Date.now() - 3_600_000,
      categories: Object.fromEntries(
        (['files', 'journey', 'covers', 'avatars', 'places', 'photos-google', 'photos-trek', 'backups'] as const).map(
          (c) => [c, { objects: 2, bytes: 1024 * 1024 }],
        ),
      ),
      legacyPhotos: { objects: 0, bytes: 0 },
    };
    usage.categories.files = { objects: 3, bytes: 2048 };
    await renderPanel({ ...baseState(), usage } as StorageAdminState);
    expect(screen.getByText(/Usage computed/)).toBeInTheDocument();
    expect(within(screen.getByTestId('m-storage-backend-backups-local')).getByText(/2 objects · 1\.0 MB/)).toBeInTheDocument();
    // Per-category usage line (the testid wraps only the select row, so assert by text).
    expect(screen.getByText('3 objects · 2.0 KB')).toBeInTheDocument();
  });

  it('FE-MOB-MSTOR-011: Sync now → running → done via the test poll', async () => {
    let polls = 0;
    await renderPanel(mirroredState());
    server.use(
      http.post('/api/admin/storage/backends/mirror/backfill', () => HttpResponse.json({ started: true })),
      http.get('/api/admin/storage', () => {
        polls += 1;
        const state = mirroredState();
        (state as StorageAdminState).backfills =
          polls < 3
            ? [{ backend: 'mirror', status: 'running', done: 1, total: 4, copied: 1, skipped: 0, failed: 0, deleted: 0, startedAt: 1 }]
            : [{ backend: 'mirror', status: 'done', done: 4, total: 4, copied: 4, skipped: 0, failed: 0, deleted: 2, startedAt: 1, finishedAt: 2 }];
        return HttpResponse.json(state);
      }),
    );
    const row = screen.getByTestId('m-storage-backend-backups-local');
    fireEvent.click(within(row).getByRole('button', { name: 'Sync now' }));
    await within(row).findByText(/Syncing… 1\/4/);
    await within(row).findByText(/Sync finished: 4 copied, 2 deleted, 0 failed/);
  });

  it('FE-MOB-MSTOR-012: a save that added targets raises the sync prompt', async () => {
    await renderPanel();
    server.use(http.put('/api/admin/storage', async () => HttpResponse.json(mirroredState())));
    fireEvent.click(within(screen.getByTestId('m-storage-backend-backups-local')).getByRole('button', { name: 'Edit' }));
    fireEvent.click(screen.getByRole('switch', { name: 'off-box' }));
    fireEvent.click(screen.getByRole('button', { name: 'Apply' }));
    fireEvent.click(screen.getByRole('button', { name: 'Save changes' }));
    await screen.findByText(/Existing objects are not replicated yet/);
  });

  it('FE-MOB-MSTOR-013: reassigning a populated category prompts before saving; Move strips it from the PUT and POSTs the migration after save', async () => {
    let putBody: unknown;
    let putCalled = false;
    let migrationBody: unknown;
    const usage = {
      computedAt: Date.now(),
      categories: { files: { objects: 3, bytes: 3072 } },
      legacyPhotos: { objects: 0, bytes: 0 },
    };
    await renderPanel({ ...baseState(), usage } as StorageAdminState);
    server.use(
      http.put('/api/admin/storage', async ({ request }) => {
        putCalled = true;
        putBody = await request.json();
        const saved = baseState();
        saved.categories.files = { backend: 'off-box', source: 'settings' };
        return HttpResponse.json(saved);
      }),
      http.post('/api/admin/storage/migrations', async ({ request }) => {
        migrationBody = await request.json();
        return HttpResponse.json({ started: true });
      }),
    );
    fireEvent.click(within(screen.getByTestId('m-storage-category-files')).getByRole('button'));
    fireEvent.click(screen.getByRole('button', { name: 'off-box' }));
    fireEvent.click(screen.getByRole('button', { name: 'Save changes' }));

    expect(await screen.findByRole('alertdialog')).toBeInTheDocument();
    expect(putCalled).toBe(false);
    expect(screen.getByText(/Trip documents: 3 objects \(3\.0 KB\) from uploads-local to off-box/)).toBeInTheDocument();

    fireEvent.click(screen.getByRole('button', { name: 'Move existing objects' }));
    await screen.findByText('Storage configuration saved');
    // files is default-sourced (uploads-local) in baseState() — stripping restores "no override".
    expect((putBody as StorageConfig).categories.files).toBeUndefined();
    // Waited for, not read straight after the toast. The toast comes from the
    // PUT, while the migration POST is fired by the queue effect one commit
    // later, so the two are not the same tick. Reading it immediately only held
    // while that effect happened to flush first, which under CI load it does
    // not. Same fix as FE-ADMIN-STOR-030 on the desktop twin.
    await waitFor(() => expect(migrationBody).toEqual({ category: 'files', to: 'off-box' }));
    expect(screen.queryByRole('alertdialog')).not.toBeInTheDocument();
  });

  it('FE-MOB-MSTOR-014: Just route new writes saves the reassignment as-is, no migration POST', async () => {
    let putBody: unknown;
    let migrationPosted = false;
    const usage = {
      computedAt: Date.now(),
      categories: { files: { objects: 3, bytes: 3072 } },
      legacyPhotos: { objects: 0, bytes: 0 },
    };
    await renderPanel({ ...baseState(), usage } as StorageAdminState);
    server.use(
      http.put('/api/admin/storage', async ({ request }) => {
        putBody = await request.json();
        const saved = baseState();
        saved.categories.files = { backend: 'off-box', source: 'settings' };
        return HttpResponse.json(saved);
      }),
      http.post('/api/admin/storage/migrations', () => {
        migrationPosted = true;
        return HttpResponse.json({ started: true });
      }),
    );
    fireEvent.click(within(screen.getByTestId('m-storage-category-files')).getByRole('button'));
    fireEvent.click(screen.getByRole('button', { name: 'off-box' }));
    fireEvent.click(screen.getByRole('button', { name: 'Save changes' }));
    await screen.findByRole('alertdialog');

    fireEvent.click(screen.getByRole('button', { name: 'Just route new writes' }));
    await screen.findByText('Storage configuration saved');
    expect((putBody as StorageConfig).categories.files).toBe('off-box');
    expect(migrationPosted).toBe(false);
    expect(screen.queryByRole('alertdialog')).not.toBeInTheDocument();
  });

  it('FE-MOB-MSTOR-015: two candidates queue sequentially: the second POSTs only after the first turns terminal', async () => {
    const usage = {
      computedAt: Date.now(),
      categories: {
        files: { objects: 3, bytes: 3072 },
        journey: { objects: 2, bytes: 2048 },
      },
      legacyPhotos: { objects: 0, bytes: 0 },
    };
    await renderPanel({ ...baseState(), usage } as StorageAdminState);
    const savedState = baseState();
    savedState.categories.files = { backend: 'off-box', source: 'settings' };
    savedState.categories.journey = { backend: 'off-box', source: 'settings' };
    const migrationPosts: Array<{ category: StorageCategory; to: string }> = [];
    // Held 'running' until the test explicitly flips this — deterministic,
    // unlike counting poll ticks against the 50ms test interval.
    let firstDone = false;
    let postCount = 0;
    server.use(
      http.put('/api/admin/storage', () => HttpResponse.json(savedState)),
      http.post('/api/admin/storage/migrations', async ({ request }) => {
        // Parse BEFORE counting, so postCount and migrationPosts move together.
        // With the increment first, the await left a window where postCount was
        // already 1 while migrationPosts was still empty — and the GET handler
        // below reports `migrations: []` for an empty migrationPosts, i.e. "no
        // migration running". A poll landing in that window told the queue it was
        // free to dequeue the second candidate, and the `waitFor(postCount === 1)`
        // further down could resolve inside it too. Rare locally, reliable under
        // CI load, where the microtask gap is wider than the 50ms test poll.
        const body = (await request.json()) as { category: StorageCategory; to: string };
        postCount += 1;
        migrationPosts.push(body);
        // Pins the single-flight fix: the second POST must never arrive
        // before the first migration is server-confirmed terminal — a
        // regression here means the queue's synchronous re-fire raced ahead
        // of admin.state showing the first as done.
        if (postCount === 2) expect(firstDone).toBe(true);
        return HttpResponse.json({ started: true });
      }),
      http.get('/api/admin/storage', () => {
        const state = { ...savedState };
        state.migrations =
          migrationPosts.length === 0
            ? []
            : [
                {
                  category: migrationPosts[0]!.category, from: 'uploads-local', to: migrationPosts[0]!.to,
                  status: firstDone ? 'done' : 'running', done: firstDone ? 3 : 1, total: 3,
                  copied: firstDone ? 3 : 1, skipped: 0, failed: 0, startedAt: 1,
                  ...(firstDone ? { finishedAt: 2 } : {}),
                },
              ];
        return HttpResponse.json(state);
      }),
    );
    fireEvent.click(within(screen.getByTestId('m-storage-category-files')).getByRole('button'));
    fireEvent.click(within(screen.getByRole('dialog', { name: 'Trip documents' })).getByRole('button', { name: 'off-box' }));
    fireEvent.click(within(screen.getByTestId('m-storage-category-journey')).getByRole('button'));
    fireEvent.click(within(screen.getByRole('dialog', { name: 'Journey photos' })).getByRole('button', { name: 'off-box' }));
    fireEvent.click(screen.getByRole('button', { name: 'Save changes' }));
    await screen.findByRole('alertdialog');
    fireEvent.click(screen.getByRole('button', { name: 'Move existing objects' }));
    await screen.findByText('Storage configuration saved');

    await waitFor(() => expect(postCount).toBe(1));
    expect(migrationPosts[0]!.category).toBe('files');
    // At the moment the first POST arrives, exactly one POST has happened —
    // and the second must not fire while the first is still running, no
    // matter how many poll ticks elapse.
    expect(postCount).toBe(1);
    await new Promise((r) => setTimeout(r, 200));
    expect(postCount).toBe(1);
    // Once the first turns terminal, the second is dequeued — the POST
    // handler's own assertion (above) pins that it never arrives early.
    firstDone = true;
    await waitFor(() => expect(postCount).toBe(2), { timeout: 2000 });
    expect(migrationPosts[1]!.category).toBe('journey');
  });

  it('FE-MOB-MSTOR-016: a done migration row shows the reclaimable line; a running one shows progress + cancel wired to DELETE', async () => {
    let cancelledCategory: string | null = null;
    const state = baseState();
    (state as StorageAdminState).migrations = [
      {
        category: 'files', from: 'uploads-local', to: 'off-box',
        status: 'running', done: 2, total: 5, copied: 1, skipped: 1, failed: 0, startedAt: 1,
      },
      {
        category: 'journey', from: 'uploads-local', to: 'off-box',
        status: 'done', done: 4, total: 4, copied: 4, skipped: 0, failed: 0, startedAt: 1, finishedAt: 2,
        reclaimable: { objects: 4, bytes: 4096 },
      },
    ];
    await renderPanel(state);
    server.use(
      http.delete('/api/admin/storage/migrations/files', () => {
        cancelledCategory = 'files';
        return HttpResponse.json({ cancelled: true });
      }),
    );
    expect(screen.getByText(/Moving Trip documents… 2\/5/)).toBeInTheDocument();
    expect(screen.getByText(/Move finished: 4 copied, 0 skipped/)).toBeInTheDocument();
    expect(screen.getByText(/4 objects \(4\.0 KB\) remain on uploads-local, reclaim manually/)).toBeInTheDocument();
    fireEvent.click(screen.getByRole('button', { name: 'Cancel move' }));
    await waitFor(() => expect(cancelledCategory).toBe('files'));
  });

  it('FE-MOB-MSTOR-017: a failed save disarms the sync-prompt snapshot', async () => {
    await renderPanel();
    server.use(http.put('/api/admin/storage', () => HttpResponse.json({ error: 'nope' }, { status: 400 })));
    fireEvent.click(within(screen.getByTestId('m-storage-backend-backups-local')).getByRole('button', { name: 'Edit' }));
    fireEvent.click(screen.getByRole('switch', { name: 'off-box' }));
    fireEvent.click(screen.getByRole('button', { name: 'Apply' }));
    fireEvent.click(screen.getByRole('button', { name: 'Save changes' }));
    await screen.findByText('nope');

    // The draft-only mirror (never saved) still renders its "Sync now" —
    // clicking it drives a genuine admin.state refresh (via refreshState())
    // that lands a world whose mirror targets grew. With the pending-prompt
    // snapshot disarmed by the failed save, the sync prompt must never appear.
    server.use(
      http.post('/api/admin/storage/backends/backups-local-mirror/backfill', () => HttpResponse.json({ started: true })),
      http.get('/api/admin/storage', () => HttpResponse.json(mirroredState())),
    );
    fireEvent.click(within(screen.getByTestId('m-storage-backend-backups-local')).getByRole('button', { name: 'Sync now' }));
    await new Promise((r) => setTimeout(r, 100));
    expect(screen.queryByText(/Existing objects are not replicated yet/)).not.toBeInTheDocument();
  });
});