// System › Overview (#249 System S2 Task 6): the concept's Overview copy on real values (D93), the Health report rows
// (D95), the Statistics tables (D96) and the health check run that waits for its read job.
const test = require('node:test');
const assert = require('node:assert/strict');

const overviewModule = import('../../web/js/workspace/system-overview.mjs');

const OVERVIEW = Object.freeze({
    library: { positive_prompts: 1234, negative_variants: 7 },
    images: { indexed: 24, rated: 20 },
    health: null,
    backup: null,
    needs_review: { pending: null },
    sources: { configured: 2, effective: 2, auto_detected: false },
});

test('metrics are the server counts and Not checked before any health check', async () => {
    const { metricValues } = await overviewModule;
    assert.deepEqual(metricValues(OVERVIEW), [
        [(1234).toLocaleString(), 'Positive prompts'], ['7', 'Negative variants'], ['24', 'Images'],
        ['Not checked', 'Database integrity'],
    ]);
});

test('metric 4 is the last health result', async () => {
    const { integrityText } = await overviewModule;
    assert.equal(integrityText(null), 'Not checked');
    assert.equal(integrityText({ status: 'passed', issues: 0 }), 'Passed');
    assert.equal(integrityText({ status: 'issues', issues: 1 }), '1 issue');
    assert.equal(integrityText({ status: 'issues', issues: 3 }), '3 issues');
    assert.equal(integrityText({ status: 'incomplete', issues: 0 }), 'Incomplete');
    // Issues found beside a check that could not run (Needs review, Q6) are still named.
    assert.equal(integrityText({ status: 'incomplete', issues: 2 }), '2 issues');
});

test('library health rows never invent a review count, a backup or thumbnails', async () => {
    const { ambiguousTitle, backupText } = await overviewModule;
    assert.equal(ambiguousTitle({ pending: null }), 'Ambiguous image links');
    assert.equal(ambiguousTitle(undefined), 'Ambiguous image links');
    assert.equal(ambiguousTitle({ pending: 1 }), '1 ambiguous image link');
    assert.equal(ambiguousTitle({ pending: 3 }), '3 ambiguous image links');
    assert.equal(backupText(null), 'No retained backup record.');
    assert.equal(backupText({ verified_at: 'not a time' }), 'No retained backup record.');
    assert.match(backupText({ verified_at: '2026-10-22T09:30:00Z' }), /^Last verified backup .+\.$/);
});

test('the thumbnail row is its own read of the thumbnail status', async () => {
    const { thumbnailTitle, THUMBNAILS_LOADING } = await overviewModule;
    // Until `/images/thumbnails/status` answers the row says it is checking; a failed read is unavailable, never 0.
    assert.equal(THUMBNAILS_LOADING, 'Checking thumbnails…');
    assert.equal(thumbnailTitle(undefined), THUMBNAILS_LOADING);
    assert.equal(thumbnailTitle({ pending: 0 }), 'No missing thumbnails');
    assert.equal(thumbnailTitle({ pending: 1 }), '1 missing thumbnail');
    assert.equal(thumbnailTitle({ pending: 12 }), '12 missing thumbnails');
    assert.equal(thumbnailTitle(null), 'Thumbnail status unavailable');
    assert.equal(thumbnailTitle({ pending: 'x' }), 'Thumbnail status unavailable');
    // With no image source there is nothing to count.
    assert.equal(thumbnailTitle({ pending: 0 }, { effective: 0 }), 'Thumbnail status unavailable');
    assert.equal(thumbnailTitle({ pending: 2 }, { effective: 1 }), '2 missing thumbnails');
});

test('the thumbnail row says N missing · M outdated · K failed, and offers Convert outdated only for outdated ones (#317)', async () => {
    const { thumbnailTitle, convertOffered } = await overviewModule;
    assert.equal(thumbnailTitle({ pending: 3, outdated: 17500, failed: 2 }), '3 missing thumbnails · 17,500 outdated · 2 failed');
    assert.equal(thumbnailTitle({ pending: 0, outdated: 1, failed: 0 }), 'No missing thumbnails · 1 outdated');
    assert.equal(thumbnailTitle({ pending: 0, outdated: 0, failed: 4 }), 'No missing thumbnails · 4 failed');
    assert.equal(thumbnailTitle({ pending: 1, outdated: 'x' }), '1 missing thumbnail');
    assert.equal(convertOffered({ pending: 0, outdated: 5 }), true);
    for (const status of [undefined, null, { pending: 0 }, { outdated: 0 }, { outdated: -1 }, { outdated: '5' }]) {
        assert.equal(convertOffered(status), false, JSON.stringify(status));
    }
});

test('an integrity count SQLite stopped at reads as a lower bound', async () => {
    const { checkChip } = await overviewModule;
    assert.equal(checkChip({ id: 'integrity', status: 'issues', count: 100, capped: true }), '100+ problems found');
    assert.equal(checkChip({ id: 'integrity', status: 'issues', count: 37, capped: false }), '37 problems found');
    assert.equal(checkChip({ id: 'integrity', status: 'issues', count: 1 }), '1 problem found');
});

test('the sources row tells configured, available and detected sources apart', async () => {
    const { sourcesCopy } = await overviewModule;
    const shared = 'Monitoring and enrichment share one source list.';
    assert.deepEqual(sourcesCopy({ configured: 2, effective: 2, auto_detected: false }), ['2 output sources', shared]);
    assert.deepEqual(sourcesCopy({ configured: 2, effective: 1, auto_detected: false }),
        ['1 output source', `1 of 2 configured sources available. ${shared}`]);
    assert.deepEqual(sourcesCopy({ configured: 0, effective: 1, auto_detected: true }),
        ['1 output source', `None configured is available; ComfyUI's output folder is used. ${shared}`]);
});

const REPORT = Object.freeze({
    checked_at: '2026-10-23T08:00:00Z',
    status: 'issues',
    checks: [
        { id: 'integrity', label: 'Integrity check', status: 'passed', count: 0 },
        { id: 'foreign_keys', label: 'Foreign keys & pair references', status: 'issues', count: 2 },
        { id: 'canonical_hashes', label: 'Canonical hashes', status: 'issues', count: 1 },
        { id: 'pair_uniqueness', label: 'Pair uniqueness', status: 'failed', count: null },
        { id: 'missing_files', label: 'Missing files', status: 'issues', count: 2,
            sources: [{ name: 'output', status: 'checked', count: 2 }] },
        { id: 'ambiguous_metadata', label: 'Ambiguous metadata', status: 'unavailable', count: null },
        { id: 'consistency', label: 'Consistency', status: 'issues', count: null },
    ],
});

test('health rows give each check a chip from its real status, in the server order', async () => {
    const { healthRows } = await overviewModule;
    assert.deepEqual(healthRows(REPORT), [
        ['Integrity check', 'Passed'],
        ['Foreign keys & pair references', '2 broken references'],
        ['Canonical hashes', '1 hash does not match its text'],
        ['Pair uniqueness', 'Could not check'],
        ['Missing files', '2 links need review'],
        ['Ambiguous metadata', 'Not available yet'],
        ['Consistency', 'Issues found'],
    ]);
});

test('missing files is reported per image source when there are several', async () => {
    const { healthRows } = await overviewModule;
    const report = { ...REPORT, checks: [{ id: 'missing_files', label: 'Missing files', status: 'issues', count: 1, partial: true,
        sources: [{ name: 'output', status: 'checked', count: 1 }, { name: 'input', status: 'checked', count: 0 },
            { name: 'archive', status: 'unavailable', count: null }] }] };
    assert.deepEqual(healthRows(report), [
        ['Missing files · output', '1 link needs review'],
        ['Missing files · input', 'Passed'],
        ['Missing files · archive', 'Not available'],
    ]);
    const unavailable = { ...REPORT, checks: [{ id: 'missing_files', label: 'Missing files', status: 'unavailable', count: null, sources: [] }] };
    assert.deepEqual(healthRows(unavailable), [['Missing files', 'Not available']]);
});

test('the report summary says when it was checked and whether it is complete', async () => {
    const { healthSummary } = await overviewModule;
    const when = new Date(REPORT.checked_at).toLocaleString();
    assert.equal(healthSummary({ ...REPORT, status: 'passed' }), `Checked ${when}. Every check passed.`);
    assert.equal(healthSummary({ ...REPORT, status: 'incomplete' }), `Checked ${when}. Some checks could not run, so this report is incomplete.`);
    assert.equal(healthSummary({ ...REPORT, checked_at: 'x' }), 'Nothing was changed; review the checks with issues.');
});

test('statistics rows are the real runs and ratings, then the library totals', async () => {
    const { categoryRows, totalsRows } = await overviewModule;
    const statistics = {
        by_category: [{ category: 'Landscapes', runs: 1200, average_rating: 4.5 },
            { category: null, runs: 3, average_rating: null }],
        totals: { total_prompts: 12, total_tags: 15, total_images: 24 },
        rated_images: 20,
    };
    assert.deepEqual(categoryRows(statistics), [['Landscapes', (1200).toLocaleString(), '4.5 / 5'], ['Uncategorized', '3', 'Not rated']]);
    assert.deepEqual(totalsRows(statistics), [['Prompts', '12'], ['Tags', '15'], ['Images', '24'], ['Rated images', '20']]);
});

/** A fake api answering each `get`/`post` from a queue per URL, recording the calls. */
function fakeApi(answers) {
    const calls = [];
    const answer = (method, url) => {
        calls.push(`${method} ${url}`);
        const queue = answers[`${method} ${url}`];
        if (!queue?.length) throw new Error(`unexpected ${method} ${url}`);
        const next = queue.shift();
        return next instanceof Error ? Promise.reject(next) : Promise.resolve(next);
    };
    return { calls, get: url => answer('GET', url), post: url => answer('POST', url) };
}

const JOB = '0123456789abcdef0123456789abcdef';
const job = (state, id = JOB, kind = 'health') => ({ id, kind, state });

/**
 * A fake Activity store holding `jobs`: `track(job)` lists a started job, `load()` applies the next of `reads` (the
 * server's job lists) and `push(job)` is a stream update; each notifies as the real store does. It never polls.
 */
function fakeActivity({ jobs = [], reads = [] } = {}) {
    const listeners = new Set();
    const emit = () => { for (const listener of [...listeners]) listener(); };
    const store = {
        loads: 0,
        find: id => jobs.find(item => item.id === id),
        running: () => jobs.filter(item => item.state === 'running'),
        subscribe(listener) { listeners.add(listener); return () => listeners.delete(listener); },
        listeners: () => listeners.size,
        async load() {
            store.loads += 1;
            if (reads.length) jobs = reads.shift();
            emit();
        },
        track(item) {
            if (!item?.id) throw new TypeError('Invalid job');
            store.push(item);
            return item;
        },
        push(item) {
            jobs = [...jobs.filter(other => other.id !== item.id), item];
            emit();
        },
    };
    return store;
}

test('a health check tracks its job in the Activity store, then reads the report', async () => {
    const { runHealthCheck } = await overviewModule;
    const api = fakeApi({
        'POST /prompt_manager/system/health': [{ job: job('running') }],
        'GET /prompt_manager/system/health': [{ report: REPORT }],
    });
    const activity = fakeActivity();
    const checking = runHealthCheck(api, { activity });
    await new Promise(resolve => setImmediate(resolve));
    // The store follows the started job's event stream; nothing reads or polls the job here.
    assert.equal(activity.loads, 0);
    assert.equal(activity.find(JOB).state, 'running');
    assert.deepEqual(api.calls, ['POST /prompt_manager/system/health']);
    activity.push(job('finished'));
    assert.equal(await checking, REPORT);
    assert.deepEqual(api.calls, ['POST /prompt_manager/system/health', 'GET /prompt_manager/system/health']);
    assert.equal(activity.listeners(), 0);
});

test('a check already running elsewhere is waited for, not refused', async () => {
    const { runHealthCheck } = await overviewModule;
    const busy = Object.assign(new Error('busy'), { status: 409, code: 'busy' });
    const api = fakeApi({
        'POST /prompt_manager/system/health': [busy],
        'GET /prompt_manager/system/health': [{ report: REPORT }],
    });
    const activity = fakeActivity({ reads: [[job('running', 'f'.repeat(32), 'scan'), job('running')]] });
    const checking = runHealthCheck(api, { activity });
    await new Promise(resolve => setImmediate(resolve));
    assert.equal(activity.loads, 1);
    activity.push(job('finished'));
    assert.equal(await checking, REPORT);
    // The other check ended between the refusal and the read: its report is the latest.
    const ended = fakeApi({ 'POST /prompt_manager/system/health': [busy], 'GET /prompt_manager/system/health': [{ report: REPORT }] });
    assert.equal(await runHealthCheck(ended, { activity: fakeActivity({ reads: [[]] }) }), REPORT);
});

test('a failed, lost or reportless check rejects; other errors pass through', async () => {
    const { runHealthCheck, waitForJob, HEALTH_FAILED_TEXT } = await overviewModule;
    const failed = fakeApi({ 'POST /prompt_manager/system/health': [{ job: job('failed') }] });
    await assert.rejects(runHealthCheck(failed, { activity: fakeActivity() }), { message: HEALTH_FAILED_TEXT });
    // The store marks a job lost when the server no longer lists it (ComfyUI restarted).
    const restarted = fakeActivity({ jobs: [job('running')] });
    const waiting = waitForJob(restarted, JOB);
    restarted.push(job('lost'));
    assert.equal(await waiting, 'lost');
    const empty = fakeApi({ 'POST /prompt_manager/system/health': [{ job: job('finished') }],
        'GET /prompt_manager/system/health': [{ report: null }] });
    await assert.rejects(runHealthCheck(empty, { activity: fakeActivity() }), { message: HEALTH_FAILED_TEXT });
    const broken = fakeApi({ 'POST /prompt_manager/system/health': [Object.assign(new Error('server'), { status: 500 })] });
    await assert.rejects(runHealthCheck(broken, { activity: fakeActivity() }), { message: 'server' });
    const invalid = fakeApi({ 'POST /prompt_manager/system/health': [{ job: null }] });
    await assert.rejects(runHealthCheck(invalid, { activity: fakeActivity() }), { message: 'Invalid job' });
});

test('waiting stops when its signal aborts', async () => {
    const { waitForJob } = await overviewModule;
    const controller = new AbortController();
    const activity = fakeActivity({ jobs: [job('running')] });
    const waiting = waitForJob(activity, JOB, { signal: controller.signal });
    await new Promise(resolve => setImmediate(resolve));
    controller.abort(new Error('left'));
    await assert.rejects(waiting, { message: 'left' });
    assert.equal(activity.listeners(), 0);
    const gone = new AbortController();
    gone.abort(new Error('already'));
    await assert.rejects(waitForJob(fakeActivity(), JOB, { signal: gone.signal }), { message: 'already' });
});

test('the thumbnail row counts previews that could not be made (#249)', async () => {
    const { thumbnailTitle } = await overviewModule;
    assert.equal(thumbnailTitle({ pending: 12, failed: 2 }), '12 missing thumbnails · 2 failed');
    assert.equal(thumbnailTitle({ pending: 1, failed: 1 }), '1 missing thumbnail · 1 failed');
    assert.equal(thumbnailTitle({ pending: 0, failed: 0 }), 'No missing thumbnails');
    assert.equal(thumbnailTitle({ pending: 3, failed: 'x' }), '3 missing thumbnails');
});