import { afterEach, describe, expect, it, vi } from 'vitest';
import { cleanup, render } from 'vitest-browser-svelte';
import { page } from 'vitest/browser';
import DocumentRow from './DocumentRow.svelte';
import type { components } from '$lib/generated/api';

vi.mock('$app/navigation', () => ({ goto: vi.fn() }));

afterEach(() => cleanup());

type DocumentSearchItem = components['schemas']['DocumentSearchItem'];

function makeItem(overrides: Partial<DocumentSearchItem> = {}): DocumentSearchItem {
	return {
		document: {
			id: '1',
			title: 'Testbrief',
			originalFilename: 'testbrief.pdf',
			status: 'UPLOADED',
			documentDate: '2024-03-15',
			sender: null,
			receivers: [],
			tags: [],
			createdAt: '2024-01-01T00:00:00Z',
			updatedAt: '2024-01-01T00:00:00Z',
			metadataComplete: false,
			scriptType: 'UNKNOWN'
		},
		matchData: {
			titleOffsets: [],
			senderMatched: false,
			matchedReceiverIds: [],
			matchedTagIds: [],
			snippetOffsets: [],
			summaryOffsets: []
		},
		completionPercentage: 0,
		contributors: [],
		...overrides
	};
}

// ─── Title ────────────────────────────────────────────────────────────────────

describe('DocumentRow – title', () => {
	it('renders document title', async () => {
		render(DocumentRow, { item: makeItem() });
		await expect.element(page.getByRole('heading', { name: 'Testbrief' })).toBeInTheDocument();
	});

	it('falls back to originalFilename when title is null', async () => {
		const item = makeItem({ document: { ...makeItem().document, title: null } });
		render(DocumentRow, { item });
		await expect.element(page.getByRole('heading', { name: 'testbrief.pdf' })).toBeInTheDocument();
	});

	it('renders a mark element for highlighted title offsets', async () => {
		const item = makeItem({
			document: { ...makeItem().document, title: 'Brief an Anna' },
			matchData: {
				titleOffsets: [{ start: 0, length: 5 }],
				senderMatched: false,
				matchedReceiverIds: [],
				matchedTagIds: [],
				snippetOffsets: [],
				summaryOffsets: []
			}
		});
		render(DocumentRow, { item });
		const mark = page.getByRole('mark');
		await expect.element(mark).toBeInTheDocument();
		await expect.element(mark).toHaveTextContent('Brief');
	});
});

// ─── Snippet ──────────────────────────────────────────────────────────────────

describe('DocumentRow – snippet', () => {
	it('shows transcription snippet when present', async () => {
		const item = makeItem({
			matchData: {
				transcriptionSnippet: 'Er schrieb einen langen Brief',
				titleOffsets: [],
				senderMatched: false,
				matchedReceiverIds: [],
				matchedTagIds: [],
				snippetOffsets: [],
				summaryOffsets: []
			}
		});
		render(DocumentRow, { item });
		await expect.element(page.getByText('Er schrieb einen langen Brief')).toBeInTheDocument();
	});

	it('does not render snippet section when no snippet', async () => {
		render(DocumentRow, { item: makeItem() });
		await expect.element(page.getByTestId('search-snippet')).not.toBeInTheDocument();
	});
});

// ─── Sender / receivers ───────────────────────────────────────────────────────

describe('DocumentRow – sender', () => {
	it('shows sender display name', async () => {
		const item = makeItem({
			document: {
				...makeItem().document,
				sender: { id: 's1', displayName: 'Großmutter Maria' }
			}
		});
		render(DocumentRow, { item });
		await expect.element(page.getByText('Großmutter Maria').first()).toBeInTheDocument();
	});

	it('shows unknown fallback when sender is null', async () => {
		render(DocumentRow, { item: makeItem() });
		const unknownElements = page.getByText('Unbekannt');
		await expect.element(unknownElements.first()).toBeInTheDocument();
	});
});

// ─── Tags ─────────────────────────────────────────────────────────────────────

describe('DocumentRow – tags', () => {
	it('renders tag buttons', async () => {
		const item = makeItem({
			document: {
				...makeItem().document,
				tags: [{ id: 't1', name: 'Familie', color: null, parentId: null }]
			}
		});
		render(DocumentRow, { item });
		await expect.element(page.getByRole('button', { name: 'Familie' })).toBeInTheDocument();
	});

	it('navigates to /documents?tag=… on tag click', async () => {
		const { goto } = await import('$app/navigation');
		const item = makeItem({
			document: {
				...makeItem().document,
				tags: [{ id: 't1', name: 'Urlaub & Reise', color: null, parentId: null }]
			}
		});
		render(DocumentRow, { item });
		await page.getByRole('button', { name: 'Urlaub & Reise' }).click();
		expect(goto).toHaveBeenCalledWith('/documents?tag=Urlaub%20%26%20Reise');
	});

	it('tag click does not navigate to the document detail page', async () => {
		const item = makeItem({
			document: {
				...makeItem().document,
				tags: [{ id: 't2', name: 'Familie', color: null, parentId: null }]
			}
		});
		render(DocumentRow, { item });
		const before = window.location.href;
		await page.getByRole('button', { name: 'Familie' }).click();
		expect(window.location.href).toBe(before);
	});
});

// ─── ProgressRing & ContributorStack ─────────────────────────────────────────

describe('DocumentRow – progress ring and contributors', () => {
	it('renders the completion percentage label', async () => {
		const item = makeItem({ completionPercentage: 42 });
		render(DocumentRow, { item });
		await expect.element(page.getByText('42%').first()).toBeInTheDocument();
	});

	it('renders contributor initials when contributors present', async () => {
		const item = makeItem({
			contributors: [{ initials: 'AR', color: '#4a90e2', name: 'Anna Raddatz' }]
		});
		render(DocumentRow, { item });
		await expect.element(page.getByText('AR').first()).toBeInTheDocument();
	});
});