import { describe, it, expect } from "vitest";
import {
  buildChatEvent,
  logChatEvent,
  CHAT_EVENT_MARKER,
  CHAT_EVENT_SCHEMA_VERSION,
} from "../../src/services/chatAnalyticsService";
import { KnowledgeLevel, TeamCode } from "../../src/types/panit";

describe("chatAnalyticsService.buildChatEvent", () => {
  it("필수 메타(마커·스키마·outcome·uid)를 항상 포함한다", () => {
    const ev = buildChatEvent({ outcome: "ok", uid: "u1" });
    expect(ev.event).toBe(CHAT_EVENT_MARKER);
    expect(ev.schema).toBe(CHAT_EVENT_SCHEMA_VERSION);
    expect(ev.outcome).toBe("ok");
    expect(ev.uid).toBe("u1");
  });

  it("메시지·응답 본문은 어떤 필드에도 담지 않는다(길이만)", () => {
    const ev = buildChatEvent({
      outcome: "ok",
      uid: "u1",
      msgLen: 42,
    });
    expect(ev.msgLen).toBe(42);
    // 본문류 키가 절대 없어야 한다.
    for (const k of ["message", "reply", "content", "text", "userContent", "assistantContent", "q"]) {
      expect(ev[k]).toBeUndefined();
    }
  });

  it("undefined/null 필드는 제거해 BQ 스키마를 깔끔히 유지한다", () => {
    const ev = buildChatEvent({
      outcome: "crisis_input",
      uid: "u1",
      teamCode: null,
      model: undefined,
      knowledgeLevel: null,
    });
    expect("teamCode" in ev).toBe(false);
    expect("model" in ev).toBe(false);
    expect("knowledgeLevel" in ev).toBe(false);
  });

  it("toolNames에서 toolCount, 토큰에서 tokensTotal을 파생한다", () => {
    const ev = buildChatEvent({
      outcome: "ok",
      uid: "u1",
      toolNames: ["get_lineup", "get_team_rank_snapshot"],
      tokensIn: 1000,
      tokensOut: 120,
      tokensCached: 800,
    });
    expect(ev.toolNames).toEqual(["get_lineup", "get_team_rank_snapshot"]);
    expect(ev.toolCount).toBe(2);
    expect(ev.tokensTotal).toBe(1120);
    expect(ev.tokensCached).toBe(800);
  });

  it("빈 toolNames도 toolCount 0으로 명시한다", () => {
    const ev = buildChatEvent({ outcome: "ok", uid: "u1", toolNames: [] });
    expect(ev.toolCount).toBe(0);
  });

  it("성공 케이스의 차원 필드를 그대로 싣는다", () => {
    const ev = buildChatEvent({
      outcome: "ok",
      uid: "u1",
      teamCode: TeamCode.OB,
      threadId: "OB",
      stylePack: "commentator",
      knowledgeLevel: KnowledgeLevel.Casual,
      promptVersion: "2026-06-12.1",
      provider: "vertex",
      model: "gemini-3.1-flash-lite",
      finishReason: "stop",
      latencyMs: 3400,
    });
    expect(ev.teamCode).toBe(TeamCode.OB);
    expect(ev.stylePack).toBe("commentator");
    expect(ev.knowledgeLevel).toBe(KnowledgeLevel.Casual);
    expect(ev.finishReason).toBe("stop");
    expect(ev.latencyMs).toBe(3400);
  });
});

describe("chatAnalyticsService.logChatEvent", () => {
  it("best-effort — 어떤 입력에도 throw하지 않는다", () => {
    expect(() => logChatEvent({ outcome: "error", uid: "u1", errorCode: "AI_UNAVAILABLE" })).not.toThrow();
  });
});