import type { CaseSeed } from '../harness/schema';
import type { ConversationTurn, TranscriptTurn } from '../types';
import {
	agentTurnsAsText,
	caseDisplayPrompt,
	conversationUserTurnsAsText,
	lastAgentText,
	perTurnToolCallCounts,
	transcriptAsText,
	userTurnsAsText,
} from '../utils/conversation-text';

describe('userTurnsAsText', () => {
	it('returns empty string on empty transcript', () => {
		expect(userTurnsAsText([])).toBe('');
	});

	it('returns the lone user message as plain text on single-turn', () => {
		const transcript: TranscriptTurn[] = [
			{ userMessage: 'build a webhook', steps: [{ kind: 'agent-text', text: 'sure' }] },
		];
		expect(userTurnsAsText(transcript)).toBe('build a webhook');
	});

	it('numbers user turns on multi-turn and drops empty/agent-only turns', () => {
		const transcript: TranscriptTurn[] = [
			{ userMessage: 'build it', steps: [{ kind: 'agent-text', text: 'what kind?' }] },
			{ userMessage: undefined, steps: [{ kind: 'agent-text', text: 'thinking…' }] },
			{ userMessage: '', steps: [{ kind: 'agent-text', text: 'plan emitted' }] },
			{ userMessage: 'a webhook', steps: [{ kind: 'agent-text', text: 'done' }] },
		];
		expect(userTurnsAsText(transcript)).toBe('Turn 1: build it\n\nTurn 2: a webhook');
	});
});

describe('agentTurnsAsText', () => {
	it('returns empty string on empty transcript', () => {
		expect(agentTurnsAsText([])).toBe('');
	});

	it('returns the lone narration as plain text when only one turn narrates', () => {
		const transcript: TranscriptTurn[] = [
			{ userMessage: 'build a webhook', steps: [{ kind: 'agent-text', text: 'Added a webhook.' }] },
		];
		expect(agentTurnsAsText(transcript)).toBe('Added a webhook.');
	});

	it('numbers narration by conversation turn, dropping turns with no agent text', () => {
		const transcript: TranscriptTurn[] = [
			{ userMessage: 'build it', steps: [{ kind: 'agent-text', text: 'Added a webhook.' }] },
			{
				userMessage: 'tweak',
				steps: [{ kind: 'tool-call', toolName: 'build-workflow', args: {} }],
			},
			{ userMessage: 'add a filter', steps: [{ kind: 'agent-text', text: 'Added a filter.' }] },
		];
		// Turn 2 has no narration, so it's skipped — but turn 3 keeps its turn number
		// so each claim still aligns with the user turn that prompted it.
		expect(agentTurnsAsText(transcript)).toBe(
			'Turn 1: Added a webhook.\n\nTurn 3: Added a filter.',
		);
	});
});

describe('conversationUserTurnsAsText', () => {
	it('returns empty string on empty conversation', () => {
		expect(conversationUserTurnsAsText([])).toBe('');
	});

	it('returns empty string when conversation is undefined (replay-seeded case)', () => {
		expect(conversationUserTurnsAsText(undefined)).toBe('');
	});

	it('returns the lone user message as plain text on a single user turn', () => {
		const conversation: ConversationTurn[] = [{ role: 'user', text: 'build a webhook' }];
		expect(conversationUserTurnsAsText(conversation)).toBe('build a webhook');
	});

	it('numbers user turns on multi-turn and drops assistant/empty turns', () => {
		const conversation: ConversationTurn[] = [
			{ role: 'user', text: 'build it' },
			{ role: 'assistant', text: 'what kind?' },
			{ role: 'user', text: '' },
			{ role: 'user', text: 'a webhook' },
		];
		expect(conversationUserTurnsAsText(conversation)).toBe('Turn 1: build it\n\nTurn 2: a webhook');
	});

	it('returns empty string when there are no non-empty user turns', () => {
		const conversation: ConversationTurn[] = [{ role: 'assistant', text: 'hello' }];
		expect(conversationUserTurnsAsText(conversation)).toBe('');
	});

	// The editor hands the agent a resource reference, not text, so the faithful
	// hand-off is `text: '' + attach`. Filtered as empty, it would hand the
	// prompt-aware checks (fulfills-user-request) an EMPTY prompt.
	it('names an attached workflow so a text-less hand-off is not dropped', () => {
		const conversation: ConversationTurn[] = [
			{ role: 'user', text: '', attach: { workflow: 'Batch loop' } },
		];
		expect(conversationUserTurnsAsText(conversation)).toBe('[attached workflow: Batch loop]');
	});

	it('keeps both the attachment and the text when the user typed something', () => {
		const conversation: ConversationTurn[] = [
			{ role: 'user', text: 'why is this failing?', attach: { workflow: 'Batch loop' } },
		];
		expect(conversationUserTurnsAsText(conversation)).toBe(
			'[attached workflow: Batch loop] why is this failing?',
		);
	});

	// `attach.workflow` is an id; the id means nothing to a prompt-aware check, so
	// the note carries the name the seed declares for it (what the live path shows).
	it('names the attachment by the seed workflow name, not its id', () => {
		const conversation: ConversationTurn[] = [
			{ role: 'user', text: '', attach: { workflow: 'wKk3RmT9xQ2bVn7L' } },
		];
		expect(conversationUserTurnsAsText(conversation, seedDeclaring('Batch loop'))).toBe(
			'[attached workflow: Batch loop]',
		);
	});
});

/** An inline seed declaring one workflow under the id the tests attach. */
function seedDeclaring(name: string): CaseSeed {
	return {
		mode: 'inline',
		messages: [
			{
				id: 'm1',
				type: 'llm',
				role: 'user',
				createdAt: '2020-01-01T00:00:00.000Z',
				content: [{ type: 'text', text: 'earlier' }],
			},
		],
		workflows: [{ id: 'wKk3RmT9xQ2bVn7L', name, nodes: [], connections: {} }],
		dataTables: [],
		agents: [],
		projects: [],
	};
}

describe('caseDisplayPrompt', () => {
	it('uses the first authored turn', () => {
		expect(caseDisplayPrompt({ conversation: [{ role: 'user', text: 'build a webhook' }] })).toBe(
			'build a webhook',
		);
	});

	// Without this the report labels, the comparison table and `Running case: ""`
	// all come out empty for the faithful hand-off shape.
	it('names the attachment when the opening turn carries no text', () => {
		expect(
			caseDisplayPrompt({
				conversation: [{ role: 'user', text: '', attach: { workflow: 'wKk3RmT9xQ2bVn7L' } }],
				seed: seedDeclaring('Batch loop'),
			}),
		).toBe('[attached workflow: Batch loop]');
	});
});

describe('transcriptAsText', () => {
	it('surfaces tool-call args and result so the judge sees what each call did', () => {
		const transcript: TranscriptTurn[] = [
			{
				userMessage: 'fetch the rows',
				steps: [
					{
						kind: 'tool-call',
						toolName: 'add-nodes',
						args: { nodeType: 'n8n-nodes-base.httpRequest' },
						result: { added: 1 },
					},
				],
			},
		];
		const text = transcriptAsText(transcript);
		expect(text).toContain('Tool: add-nodes');
		expect(text).toContain('n8n-nodes-base.httpRequest');
		expect(text).toContain('"added":1');
	});

	it('prefers the error over the result and caps long fields', () => {
		const transcript: TranscriptTurn[] = [
			{
				steps: [
					{
						kind: 'tool-call',
						toolName: 'httpRequest',
						args: { url: 'x'.repeat(5000) },
						error: 'boom',
					},
				],
			},
		];
		const text = transcriptAsText(transcript);
		expect(text).toContain('error: boom');
		expect(text).not.toContain('result:');
		expect(text).toContain('more chars)');
	});

	it('surfaces plan task descriptions, not just titles', () => {
		const transcript: TranscriptTurn[] = [
			{
				steps: [
					{
						kind: 'plan',
						tasks: [{ title: 'Fetch posts', description: 'GET /posts with pagination' }],
					},
				],
			},
		];
		const text = transcriptAsText(transcript);
		expect(text).toContain('Fetch posts');
		expect(text).toContain('GET /posts with pagination');
	});

	it('surfaces the confirmation prompt and the user feedback on a decision', () => {
		const transcript: TranscriptTurn[] = [
			{
				steps: [
					{
						kind: 'confirmation',
						toolName: 'create-tasks',
						resumeReason: 'approval',
						approved: false,
						message: 'Here is the plan, approve?',
						feedback: 'No — use a Webhook trigger, not a Schedule',
					},
				],
			},
		];
		const text = transcriptAsText(transcript);
		expect(text).toContain('(rejected)');
		expect(text).toContain('prompt: Here is the plan, approve?');
		expect(text).toContain('user feedback: No — use a Webhook trigger, not a Schedule');
	});
});

describe('perTurnToolCallCounts', () => {
	it('counts each tool per turn and omits turns with no tool calls', () => {
		const transcript: TranscriptTurn[] = [
			{ userMessage: 'go', steps: [{ kind: 'agent-text', text: 'ok' }] },
			{
				steps: [
					{ kind: 'tool-call', toolName: 'build-workflow' },
					{ kind: 'tool-call', toolName: 'build-workflow' },
					{ kind: 'tool-call', toolName: 'add-nodes' },
				],
			},
			{ steps: [{ kind: 'tool-call', toolName: 'build-workflow' }] },
		];
		expect(perTurnToolCallCounts(transcript)).toBe(
			'Turn 2: build-workflow×2, add-nodes×1\nTurn 3: build-workflow×1',
		);
	});

	it('returns a sentinel when no turn called a tool', () => {
		expect(perTurnToolCallCounts([{ steps: [{ kind: 'agent-text', text: 'hi' }] }])).toBe(
			'(no tool calls in any turn)',
		);
	});
});

describe('lastAgentText', () => {
	it('returns the most recent turn agent narration, skipping trailing turns with none', () => {
		expect(lastAgentText([])).toBe('');
		const transcript: TranscriptTurn[] = [
			{ steps: [{ kind: 'agent-text', text: 'first' }], seeded: true },
			{ steps: [{ kind: 'agent-text', text: 'latest' }], seeded: true },
			// Live turn that produced no narration (the no-op fallback case).
			{ userMessage: 'and now?', steps: [] },
		];
		expect(lastAgentText(transcript)).toBe('latest');
	});
});