const test = require('node:test');
const assert = require('node:assert/strict');
const { channelListWarning, presentLayaStatus } = require('../public/js/services/layaStatusPresentation.js');

test('presents unknown-size downloads as indeterminate with downloaded bytes', () => {
    const view = presentLayaStatus({
        phase: 'downloading',
        downloading: true,
        progressPercent: null,
        bytesDownloaded: 12 * 1024 * 1024,
        totalBytes: null
    });
    assert.equal(view.progressIndeterminate, true);
    assert.equal(view.progressPercent, null);
    assert.equal(view.bytesDownloaded, 12 * 1024 * 1024);
    assert.equal(view.showDownload, false);
    assert.equal(view.showRemove, false);
});

test('presents known progress as a bounded percentage', () => {
    const view = presentLayaStatus({ phase: 'downloading', downloading: true, progressPercent: 47.6 });
    assert.equal(view.progressIndeterminate, false);
    assert.equal(view.progressPercent, 48);
});

test('failed downloads expose retry, safe details and Standard fallback', () => {
    const view = presentLayaStatus({
        phase: 'failed',
        modelPresent: false,
        error: { message: 'Model download failed', detail: 'The optional Laya runtime is unavailable.' }
    }, 'hybrid');
    assert.equal(view.downloadLabel, 'Retry download');
    assert.equal(view.showDownload, true);
    assert.equal(view.showUseStandard, true);
    assert.equal(view.errorMessage, 'Model download failed');
    assert.equal(view.errorDetail, 'The optional Laya runtime is unavailable.');
});

test('ready models expose removal without download actions', () => {
    const view = presentLayaStatus({ phase: 'idle', modelPresent: true, runtimeAvailable: true, sizeBytes: 678323814 });
    assert.equal(view.statusLabel, 'Ready');
    assert.equal(view.showRemove, true);
    assert.equal(view.showDownload, false);
    assert.equal(view.showCheckAgain, false);
    assert.equal(view.showStartCommand, false);
    assert.equal(view.availabilityMessage, '');
});

test('ChannelList warning only appears for active Laya modes when unavailable or failed', () => {
    const ready = { modelPresent: true, runtimeAvailable: true };
    assert.equal(channelListWarning('hybrid', ready), '');
    assert.equal(channelListWarning('laya', ready), '');
    assert.equal(channelListWarning('algo', { modelPresent: false, runtimeAvailable: false }), '');
    assert.equal(
        channelListWarning('hybrid', { modelPresent: true, runtimeAvailable: false }),
        'Local AI service is unavailable. Standard channel matching is being used.'
    );
    assert.equal(
        channelListWarning('laya', ready, true),
        'Local AI language detection failed. Channels were grouped with Standard matching and remain available.'
    );
});

test('installed model with unavailable service is not reported ready', () => {
    const view = presentLayaStatus({
        phase: 'idle',
        modelPresent: true,
        runtimeAvailable: false,
        sizeBytes: 10
    }, 'hybrid');
    assert.equal(view.ready, false);
    assert.equal(view.statusLabel, 'Local AI service unavailable');
    assert.equal(view.modelLabel, 'Model: Downloaded');
    assert.equal(view.serviceLabel, 'Local AI service: Unavailable');
    assert.equal(view.showDownload, false);
    assert.equal(view.showRemove, true);
    assert.equal(view.showCheckAgain, true);
    assert.equal(view.showStartCommand, true);
    assert.equal(view.availabilityMessage, 'The model is installed, but the Local AI service is not running. Standard channel matching is being used.');
});

test('missing model keeps download available', () => {
    const view = presentLayaStatus({ phase: 'idle', modelPresent: false, runtimeAvailable: false });
    assert.equal(view.showDownload, true);
    assert.equal(view.showRemove, false);
    assert.equal(view.showCheckAgain, false);
});