import assert from 'node:assert/strict'
import { describe, it } from 'node:test'
import { eligibleIssues, hasSkippedLabel, isEligibleIssue } from './eligibility.ts'
import { skippedLabel, type FrictionIssue, type IssueComment } from './shared.ts'

function comment(input: Partial<IssueComment> & Pick<IssueComment, 'body' | 'createdAt'>): IssueComment {
	return {
		id: input.id ?? 1,
		userLogin: input.userLogin ?? 'kody-bot',
		createdAt: input.createdAt,
		body: input.body,
	}
}

function issue(input: { labels?: Array<string>; comments?: Array<IssueComment> } = {}): FrictionIssue {
	return {
		number: 12,
		title: 'Friction: pnpm test files',
		body: 'test files are ignored',
		htmlUrl: 'https://github.com/kody-hq/kody/issues/12',
		userLogin: 'agent',
		createdAt: '2026-08-20T00:00:00.000Z',
		updatedAt: '2026-08-21T00:00:00.000Z',
		labels: input.labels ?? ["friction"],
		comments: input.comments ?? [],
	}
}

describe('isEligibleIssue', () => {
	it('keeps an open friction issue without friction-skipped', () => {
		assert.deepEqual(isEligibleIssue(issue()), { eligible: true, reason: 'open' })
	})

	it('skips an issue labeled friction-skipped even if Kent later commented', () => {
		const skipped = issue({
			labels: ['friction', skippedLabel],
			comments: [
				comment({
					id: 2,
					userLogin: 'kody-bot',
					createdAt: '2026-08-21T12:00:00.000Z',
					body: 'Recommended fix.',
				}),
				comment({
					id: 3,
					userLogin: 'kentcdodds',
					createdAt: '2026-08-21T13:00:00.000Z',
					body: 'Ship the recommended fix.',
				}),
			],
		})
		assert.deepEqual(isEligibleIssue(skipped), { eligible: false, reason: 'skipped' })
		assert.equal(hasSkippedLabel(skipped), true)
	})

	it('does not parse HTML skip comments for eligibility', () => {
		const commented = issue({
			labels: ['friction'],
			comments: [
				comment({
					id: 2,
					userLogin: 'kody-bot',
					createdAt: '2026-08-21T12:00:00.000Z',
					body: 'Recommended fix.\n\n' + '<!-- friction-log:skipped -->',
				}),
			],
		})
		assert.deepEqual(isEligibleIssue(commented), { eligible: true, reason: 'open' })
	})

	it('requeues when friction-skipped is removed, regardless of comments', () => {
		const unskipped = issue({
			labels: ['friction'],
			comments: [
				comment({
					id: 2,
					userLogin: 'kody-bot',
					createdAt: '2026-08-21T12:00:00.000Z',
					body: 'Recommended fix.',
				}),
			],
		})
		assert.deepEqual(isEligibleIssue(unskipped), { eligible: true, reason: 'open' })
	})
})

describe('eligibleIssues', () => {
	it('drops friction-skipped issues and keeps open friction issues', () => {
		const open = issue()
		const skipped = issue({ labels: ['friction', skippedLabel] })
		const selected = eligibleIssues([open, skipped])
		assert.deepEqual(
			selected.map((row) => row.number),
			[12],
		)
		assert.equal(selected[0], open)
	})
})