import { describe, expect, it, vi } from 'vitest';
import { getRegistry } from '@jackwener/opencli/registry';
import { ArgumentError, AuthRequiredError, CommandExecutionError, EmptyResultError } from '@jackwener/opencli/errors';
import './people-search.js';

const {
    parseLimit,
    buildSearchUrl,
    looksLinkedInAuthWall,
    normalizeProfileUrl,
    normalizePeopleRows,
    parseNonNegativeCount,
    extractionScript,
} = await import('./people-search.js').then((m) => m.__test__);

function extractionResult(rows, counts = {}) {
    return {
        rows,
        candidate_count: counts.candidate_count ?? rows.length,
        person_entries_count: counts.person_entries_count ?? counts.candidate_count ?? rows.length,
        resolved_count: counts.resolved_count ?? rows.length,
    };
}

function makePage({
    evaluateResult,
    evaluateReject,
    gotoReject,
    cookies = [{ name: 'JSESSIONID', value: '"ajax:1234567890"' }],
} = {}) {
    return {
        goto: vi.fn().mockImplementation(() => gotoReject ? Promise.reject(gotoReject) : Promise.resolve(undefined)),
        wait: vi.fn().mockResolvedValue(undefined),
        getCookies: vi.fn().mockResolvedValue(cookies),
        evaluate: vi.fn().mockImplementation(() => evaluateReject ? Promise.reject(evaluateReject) : Promise.resolve(evaluateResult)),
    };
}

describe('linkedin people-search command', () => {
    it('builds the canonical SSR search URL with encoded keywords', () => {
        expect(buildSearchUrl('site reliability engineer'))
            .toBe('https://www.linkedin.com/search/results/people/?keywords=site%20reliability%20engineer');
        expect(buildSearchUrl('hello/world & stuff'))
            .toBe('https://www.linkedin.com/search/results/people/?keywords=hello%2Fworld%20%26%20stuff');
    });

    it('validates --limit without silent clamping', () => {
        expect(parseLimit(undefined)).toBe(5);
        expect(parseLimit(1)).toBe(1);
        expect(parseLimit(10)).toBe(10);
        expect(() => parseLimit(0)).toThrow(ArgumentError);
        expect(() => parseLimit(11)).toThrow(ArgumentError);
        expect(() => parseLimit(-1)).toThrow(ArgumentError);
        expect(() => parseLimit('abc')).toThrow(ArgumentError);
        expect(() => parseLimit(1.5)).toThrow(ArgumentError);
    });

    it('extraction script slices main.innerText by person-name boundaries', () => {
        const s = extractionScript();
        // Anchor enumeration finds /in/<handle>.
        expect(s).toContain('a[href*="/in/"]');
        expect(s).toContain('\\/in\\/([^/?#]+)');
        // Text-slice approach: split main.innerText and locate names.
        expect(s).toContain('main.innerText');
        expect(s).toContain('lines.findIndex');
        // Mutual-connection anchors are filtered out via the skip()
        // predicate on the name-line match.
        expect(s).toContain('mutual connection');
        // Names dedup'd by handle.
        expect(s).toContain('seenHandles');
        // Aria-hidden span as canonical name source.
        expect(s).toContain('span[aria-hidden="true"]');
        // Only operates on the people-search page.
        expect(s).toContain('search\\/results\\/people');
        expect(s).toContain('candidate_count');
        expect(s).toContain('resolved_count');
    });

    it('normalizes only stable LinkedIn profile identities', () => {
        expect(normalizeProfileUrl('https://www.linkedin.com/in/alice-engineer/?mini=true'))
            .toBe('https://www.linkedin.com/in/alice-engineer/');
        expect(normalizeProfileUrl('https://linkedin.com/in/bob-builder')).toBe('https://www.linkedin.com/in/bob-builder/');
        expect(normalizeProfileUrl('https://evil-linkedin.com/in/bob-builder')).toBe('');
        expect(normalizeProfileUrl('http://www.linkedin.com/in/bob-builder')).toBe('');
        expect(normalizeProfileUrl('https://www.linkedin.com/company/opencli')).toBe('');
    });

    it('detects LinkedIn auth-wall URLs separately from CUL redirects', () => {
        expect(looksLinkedInAuthWall('https://www.linkedin.com/authwall Sign in to continue')).toBe(true);
        expect(looksLinkedInAuthWall('https://www.linkedin.com/checkpoint/challenge security verification required')).toBe(true);
        expect(looksLinkedInAuthWall('https://www.linkedin.com/feed/')).toBe(false);
    });

    it('rejects malformed extraction rows instead of fabricating success rows', () => {
        expect(() => normalizePeopleRows({})).toThrow(CommandExecutionError);
        expect(() => normalizePeopleRows([null])).toThrow(CommandExecutionError);
        expect(() => normalizePeopleRows([{ name: 'No URL', headline: 'h', location: 'l', profile_url: '' }]))
            .toThrow(CommandExecutionError);
        expect(() => normalizePeopleRows([{ name: '', headline: 'h', location: 'l', profile_url: 'https://www.linkedin.com/in/no-name/' }]))
            .toThrow(CommandExecutionError);
    });

    it('validates extraction evidence counters', () => {
        expect(parseNonNegativeCount(0, 'candidate_count')).toBe(0);
        expect(parseNonNegativeCount(2, 'candidate_count')).toBe(2);
        expect(() => parseNonNegativeCount(undefined, 'candidate_count')).toThrow(CommandExecutionError);
        expect(() => parseNonNegativeCount(-1, 'candidate_count')).toThrow(CommandExecutionError);
        expect(() => parseNonNegativeCount(1.2, 'candidate_count')).toThrow(CommandExecutionError);
    });

    it('returns ranked rows when the page yields people', async () => {
        const cmd = getRegistry().get('linkedin/people-search');
        expect(cmd?.func).toBeTypeOf('function');
        const page = makePage({
            evaluateResult: extractionResult([
                { name: 'Alice Engineer', headline: 'Staff SWE at Acme', location: 'Berlin', profile_url: 'https://www.linkedin.com/in/alice-engineer/' },
                { name: 'Bob Builder', headline: 'CTO at Globex', location: 'Remote', profile_url: 'https://www.linkedin.com/in/bob-builder/' },
            ]),
        });
        const result = await cmd.func(page, { keywords: 'reinforcement learning', limit: 5 });
        expect(page.goto).toHaveBeenCalledWith('https://www.linkedin.com/search/results/people/?keywords=reinforcement%20learning');
        expect(result).toEqual([
            { rank: 1, name: 'Alice Engineer', headline: 'Staff SWE at Acme', location: 'Berlin', profile_url: 'https://www.linkedin.com/in/alice-engineer/' },
            { rank: 2, name: 'Bob Builder', headline: 'CTO at Globex', location: 'Remote', profile_url: 'https://www.linkedin.com/in/bob-builder/' },
        ]);
    });

    it('slices to --limit when more rows are extracted than requested', async () => {
        const cmd = getRegistry().get('linkedin/people-search');
        const page = makePage({
            evaluateResult: extractionResult(Array.from({ length: 8 }, (_, i) => ({
                name: `Person ${i}`, headline: 'h', location: 'l', profile_url: `https://www.linkedin.com/in/p${i}/`,
            }))),
        });
        const result = await cmd.func(page, { keywords: 'x', limit: 3 });
        expect(result).toHaveLength(3);
        expect(result.map((r) => r.rank)).toEqual([1, 2, 3]);
    });

    it('throws AuthRequiredError when JSESSIONID cookie is missing', async () => {
        const cmd = getRegistry().get('linkedin/people-search');
        const page = makePage({ cookies: [], evaluateResult: extractionResult([]) });
        await expect(cmd.func(page, { keywords: 'x', limit: 5 })).rejects.toBeInstanceOf(AuthRequiredError);
    });

    it('treats malformed cookie lookup results as CommandExecutionError', async () => {
        const cmd = getRegistry().get('linkedin/people-search');
        const page = makePage({ cookies: null, evaluateResult: extractionResult([]) });
        await expect(cmd.func(page, { keywords: 'x', limit: 5 })).rejects.toBeInstanceOf(CommandExecutionError);
    });

    it('treats LinkedIn redirect away from search page as a CUL-flavoured CommandExecutionError', async () => {
        const cmd = getRegistry().get('linkedin/people-search');
        const page = makePage({ evaluateResult: { error: 'not on people search page', url: 'https://www.linkedin.com/' } });
        await expect(cmd.func(page, { keywords: 'x', limit: 5 })).rejects.toBeInstanceOf(CommandExecutionError);
    });

    it('treats LinkedIn auth-wall redirects as AuthRequiredError', async () => {
        const cmd = getRegistry().get('linkedin/people-search');
        const page = makePage({ evaluateResult: { error: 'not on people search page', url: 'https://www.linkedin.com/authwall?trk=people_search' } });
        await expect(cmd.func(page, { keywords: 'x', limit: 5 })).rejects.toBeInstanceOf(AuthRequiredError);
    });

    it('wraps browser extraction exceptions as CommandExecutionError', async () => {
        const cmd = getRegistry().get('linkedin/people-search');
        const page = makePage({ evaluateReject: new SyntaxError('Unexpected token <') });
        await expect(cmd.func(page, { keywords: 'x', limit: 5 })).rejects.toBeInstanceOf(CommandExecutionError);
    });

    it('wraps browser navigation exceptions as CommandExecutionError', async () => {
        const cmd = getRegistry().get('linkedin/people-search');
        const page = makePage({ gotoReject: new Error('navigation failed') });
        await expect(cmd.func(page, { keywords: 'x', limit: 5 })).rejects.toBeInstanceOf(CommandExecutionError);
    });

    it('throws EmptyResultError when the page rendered zero rows', async () => {
        const cmd = getRegistry().get('linkedin/people-search');
        const page = makePage({ evaluateResult: extractionResult([]) });
        await expect(cmd.func(page, { keywords: 'x', limit: 5 })).rejects.toBeInstanceOf(EmptyResultError);
    });

    it('treats profile candidates without stable parsed rows as parser drift', async () => {
        const cmd = getRegistry().get('linkedin/people-search');
        const page = makePage({
            evaluateResult: extractionResult([], {
                candidate_count: 1,
                person_entries_count: 1,
                resolved_count: 0,
            }),
        });
        await expect(cmd.func(page, { keywords: 'x', limit: 5 })).rejects.toBeInstanceOf(CommandExecutionError);
    });

    it('treats missing rows array as parser drift, not empty results', async () => {
        const cmd = getRegistry().get('linkedin/people-search');
        const page = makePage({ evaluateResult: {} });
        await expect(cmd.func(page, { keywords: 'x', limit: 5 })).rejects.toBeInstanceOf(CommandExecutionError);
    });

    it('rejects empty keywords with ArgumentError before navigation', async () => {
        const cmd = getRegistry().get('linkedin/people-search');
        const page = makePage({ evaluateResult: extractionResult([]) });
        await expect(cmd.func(page, { keywords: '   ', limit: 5 })).rejects.toBeInstanceOf(ArgumentError);
        expect(page.goto).not.toHaveBeenCalled();
    });

    it('registers with the expected columns and arg shape', () => {
        const cmd = getRegistry().get('linkedin/people-search');
        expect(cmd?.columns).toEqual(['rank', 'name', 'headline', 'location', 'profile_url']);
        expect(cmd?.access).toBe('read');
        expect(cmd?.browser).toBe(true);
        const keywordsArg = cmd?.args?.find((a) => a.name === 'keywords');
        expect(keywordsArg?.positional).toBe(true);
        expect(keywordsArg?.required).toBe(true);
    });
});