const { describe, test } = require('node:test');
const assert = require('node:assert');
const { BB, resetMockElement } = require('./setup');

describe('BB.sources.select', () => {
    test('sets currentSource state', async () => {
        await BB.sources.select('s1');
        assert.strictEqual(BB.state.currentSource, 's1');
    });

    test('resets pagination', async () => {
        BB.state.set('currentPage', 5);
        await BB.sources.select('s2');
        assert.strictEqual(BB.state.currentPage, 0);
    });

    test('clears selectedItemId', async () => {
        BB.state.set('selectedItemId', 'x');
        await BB.sources.select('');
        assert.strictEqual(BB.state.selectedItemId, null);
    });

    test('clears currentQueryFeed', async () => {
        BB.state.set('currentQueryFeed', 'qf');
        await BB.sources.select('s1');
        assert.strictEqual(BB.state.currentQueryFeed, null);
    });
});

describe('BB.sources.selectTag', () => {
    test('sets currentTag', async () => {
        await BB.sources.selectTag('tech');
        assert.strictEqual(BB.state.currentTag, 'tech');
    });

    test('resets pagination', async () => {
        BB.state.set('currentPage', 3);
        await BB.sources.selectTag('news');
        assert.strictEqual(BB.state.currentPage, 0);
    });
});

describe('BB.sources.load', () => {
    test('populates state', async () => {
        await BB.sources.load();
        assert.strictEqual(BB.state.sources.length, 2);
        assert.deepStrictEqual(BB.state.allTags, ['news', 'tech']);
    });
});

describe('BB.sources.render', () => {
    test('renderSourceList creates correct number of source elements', () => {
        resetMockElement('sources-list');
        const sources = [
            { id: 's1', name: 'Feed A', totalCount: 10, unreadCount: 3, tags: ['news'], health: 'green' },
            { id: 's2', name: 'Feed B', totalCount: 5, unreadCount: 0, tags: [], health: 'yellow', lastError: 'timeout' },
            { id: 's3', name: 'Feed C', totalCount: 0, unreadCount: 0, tags: [], health: 'red', lastError: 'dns fail' },
        ];
        BB.state.set('currentSource', '');
        BB.state.set('queryFeeds', []);
        BB.sources.render(sources);
        const list = document.getElementById('sources-list');
        // 1 All + 3 source items + 1 "+ Query Feed" button
        assert.strictEqual(list.children.length, 5);
    });

    test('source health indicator shows correct class for yellow', () => {
        resetMockElement('sources-list');
        const sources = [
            { id: 's1', name: 'Feed A', totalCount: 5, unreadCount: 0, tags: [], health: 'yellow', lastError: 'timeout' },
        ];
        BB.state.set('currentSource', '');
        BB.state.set('queryFeeds', []);
        BB.sources.render(sources);
        const list = document.getElementById('sources-list');
        const sourceItem = list.children[1]; // children[0] is "All", sources start at [1]
        assert.ok(sourceItem.innerHTML.includes('data-health="yellow"'), 'Should have data-health="yellow" attribute');
    });

    test('source with unreadCount=0 shows total via all-read style (no slash, no checkmark)', () => {
        resetMockElement('sources-list');
        const sources = [
            { id: 's1', name: 'Feed A', totalCount: 5, unreadCount: 0, tags: [], health: 'green' },
        ];
        BB.state.set('currentSource', '');
        BB.state.set('queryFeeds', []);
        BB.sources.render(sources);
        const list = document.getElementById('sources-list');
        const sourceItem = list.children[1]; // children[0] is "All"
        assert.ok(sourceItem.innerHTML.includes('all-read'), 'Should mark the count all-read (green)');
        assert.ok(sourceItem.innerHTML.includes('5'), 'Should show total count');
        assert.ok(!sourceItem.innerHTML.includes('0/5'), 'Should not show 0/X format');
        assert.ok(!sourceItem.innerHTML.includes('\u2713'), 'Should not show a checkmark');
    });

    test('source with lastError shows error text in health dot title', () => {
        resetMockElement('sources-list');
        const sources = [
            { id: 's1', name: 'Feed A', totalCount: 5, unreadCount: 0, tags: [], health: 'red', lastError: 'dns fail' },
        ];
        BB.state.set('currentSource', '');
        BB.state.set('queryFeeds', []);
        BB.sources.render(sources);
        const list = document.getElementById('sources-list');
        const sourceItem = list.children[1]; // children[0] is "All"
        assert.ok(sourceItem.innerHTML.includes('dns fail'), 'Should include error text');
    });

    test('empty sources array renders All item, onboarding, and + button', () => {
        resetMockElement('sources-list');
        BB.state.set('currentSource', '');
        BB.state.set('queryFeeds', []);
        BB.sources.render([]);
        const list = document.getElementById('sources-list');
        // All item + onboarding message + "+ Query Feed" button
        assert.strictEqual(list.children.length, 3);
        assert.ok(list.children[0].innerHTML.includes('All'), 'Should have All entry');
        assert.ok(list.children[1].innerHTML.includes('Add your first feed'), 'Should have onboarding message');
    });
});