import { describe, expect, it } from "vitest";
import * as shared from "../src/index.js";

function schema(): { parse(value: unknown): unknown; safeParse(value: unknown): { success: boolean } } {
  const candidate = Reflect.get(shared, "HarnessEventSchema");
  expect(candidate, "HarnessEventSchema must be exported").toBeDefined();
  return candidate;
}

const base = {
  eventId: "evt_1",
  sessionId: "ses_1",
  timestamp: "2026-09-07T00:00:00.000Z",
  sequence: 1,
};

describe("HarnessEventSchema", () => {
  it("accepts every required event discriminant", () => {
    const payloads: Record<string, unknown> = {
      "session.started": { cwd: "workspace/sessions/ses_1" },
      "session.ended": { reason: "deleted" },
      "user.message": { messageId: "msg_1", text: "hello", attachmentIds: [] },
      "assistant.delta": { messageId: "msg_2", delta: "hel" },
      "assistant.completed": { messageId: "msg_2" },
      "skill.requested": { name: "ads-analysis", source: "project" },
      "skill.loaded": { name: "ads-analysis", source: "project" },
      "tool.requested": { toolCallId: "call_1", toolName: "mock_ads_metrics", arguments: {} },
      "tool.completed": { toolCallId: "call_1", toolName: "mock_ads_metrics", result: {} },
      "tool.failed": { toolCallId: "call_1", toolName: "mock_ads_metrics", error: "failed" },
      "approval.required": { approvalId: "ap_1", toolCallId: "call_1", toolName: "save_report_draft", riskLevel: "medium", expiresAt: "2026-09-07T00:01:00.000Z", arguments: {} },
      "approval.resolved": { approvalId: "ap_1", status: "approved" },
      "attachment.uploaded": { attachmentId: "att_1", name: "creative.png", mediaType: "image/png", byteSize: 12, width: 1, height: 1 },
      "attachment.rejected": { name: "bad.svg", reason: "UNSUPPORTED_IMAGE" },
      "model.configured": { providerId: "openai", modelId: "gpt-image", supportsImages: true, source: "session" },
      "model.validation_failed": { code: "MODEL_CONNECTION_FAILED", message: "Connection failed" },
      "run.started": { modelId: "gpt-image" },
      "run.cancelled": { reason: "user" },
      "run.completed": { messageId: "msg_2" },
      "run.failed": { code: "MODEL_ERROR", message: "Run failed" },
    };

    for (const [type, payload] of Object.entries(payloads)) {
      expect(schema().safeParse({ ...base, type, payload }).success, type).toBe(true);
    }
  });

  it("rejects a payload belonging to another discriminant", () => {
    expect(schema().safeParse({
      ...base,
      type: "assistant.delta",
      payload: { approvalId: "ap_1" },
    }).success).toBe(false);
  });

  it("requires a positive sequence", () => {
    expect(schema().safeParse({
      ...base,
      sequence: 0,
      type: "session.started",
      payload: { cwd: "workspace/sessions/ses_1" },
    }).success).toBe(false);
  });
});