import { createHmac } from "node:crypto";
import { describe, expect, it } from "vitest";

import {
  addinTicketSecret,
  parseTicketTokenBody,
  ticketToDocverClaims,
  verifyAddinTicket,
} from "@/lib/addin-ticket";

// PLAN-ADDIN-AUTH.md §3 — pure ล้วน (verifyAddinTicket รับ secret ทาง parameter)
// ไม่แตะ @/db/minio — รันได้โดยไม่ต้องตั้ง env อะไร (เหมือน docver-token.test.ts)

const SECRET = "super_secret";

/** ตัว ticket ตัวอย่าง — key เรียงตามตัวอักษรเหมือนตัว stamp จริง (sortObjectKeys ของ lib-utils) */
const TICKET_DATA = JSON.stringify({
  exp: Math.floor(Date.now() / 1000) + 300,
  fid: "T12_FD155_3s-long_ZZZ",
  tid: "T12",
  uid: "oom",
  uname: "สรวิชญ์",
});

function sign(message: string, secret: string = SECRET): string {
  return createHmac("sha256", secret).update(message, "utf8").digest("hex");
}

function ok<T>(result: { ok: boolean } & T): asserts result is { ok: true } & T {
  expect(result.ok).toBe(true);
}

describe("verifyAddinTicket", () => {
  it("ticket ถูกต้อง + HMAC ตรง = ผ่าน ได้ ticket แกะแล้ว", () => {
    const result = verifyAddinTicket(TICKET_DATA, sign(TICKET_DATA), SECRET);
    ok(result);
    expect(result.ticket.fid).toBe("T12_FD155_3s-long_ZZZ");
    expect(result.ticket.uid).toBe("oom");
    expect(result.ticket.tid).toBe("T12");
  });

  it("HMAC ผิด (แก้ ticket 1 ตัวอักษร / secret ผิด / digest เพี้ยน) = ไม่ผ่านทุกกรณี", () => {
    const digest = sign(TICKET_DATA);
    const tampered = `${TICKET_DATA.slice(0, -2)}xx}`;
    expect(verifyAddinTicket(tampered, digest, SECRET).ok).toBe(false);
    expect(verifyAddinTicket(TICKET_DATA, sign(TICKET_DATA, "wrong-secret"), SECRET).ok).toBe(false);
    const flipped = `${digest.slice(0, -1)}${digest.endsWith("0") ? "1" : "0"}`;
    expect(verifyAddinTicket(TICKET_DATA, flipped, SECRET).ok).toBe(false);
  });

  it("digest รูปไม่ใช่ (ไม่ใช่ hex / สั้น / ว่าง) = ไม่ผ่าน · uppercase hex normalize แล้วผ่านได้", () => {
    expect(verifyAddinTicket(TICKET_DATA, "zz".repeat(32), SECRET).ok).toBe(false);
    expect(verifyAddinTicket(TICKET_DATA, "abcd", SECRET).ok).toBe(false);
    expect(verifyAddinTicket(TICKET_DATA, "", SECRET).ok).toBe(false);
    expect(verifyAddinTicket(TICKET_DATA, sign(TICKET_DATA).toUpperCase(), SECRET).ok).toBe(true);
  });

  it("ticket หมดอายุ (exp อดีต / เท่ากับ now) = ไม่ผ่าน แม้ HMAC ถูก", () => {
    const now = Math.floor(Date.now() / 1000);
    for (const exp of [now - 1, now]) {
      const expired = JSON.stringify({ exp, fid: "f", uid: "u", uname: "n" });
      expect(verifyAddinTicket(expired, sign(expired), SECRET, now).ok, `exp=${exp}`).toBe(false);
    }
    const alive = JSON.stringify({ exp: now + 1, fid: "f", uid: "u", uname: "n" });
    expect(verifyAddinTicket(alive, sign(alive), SECRET, now).ok).toBe(true);
  });

  it("HMAC ถูกแต่ ticket ผิดกติกา (field หลุด allowlist / exp ไม่ใช่ integer) = ไม่ผ่าน", () => {
    const extra = JSON.stringify({ exp: Math.floor(Date.now() / 1000) + 60, fid: "f", uid: "u", uname: "n", oops: 1 });
    expect(verifyAddinTicket(extra, sign(extra), SECRET).ok).toBe(false);
    const badExp = JSON.stringify({ exp: "123", fid: "f", uid: "u", uname: "n" });
    expect(verifyAddinTicket(badExp, sign(badExp), SECRET).ok).toBe(false);
  });
});

describe("ticketToDocverClaims", () => {
  it("แปลง uid→userid, uname→username, tid→template · tid ไม่มี = null", () => {
    expect(
      ticketToDocverClaims({ exp: 1, fid: "F1", tid: "T12", uid: "oom", uname: "สรวิชญ์" }),
    ).toEqual({ userid: "oom", username: "สรวิชญ์", fid: "F1", template: "T12" });
    expect(
      ticketToDocverClaims({ exp: 1, fid: "F1", tid: null, uid: "oom", uname: "สรวิชญ์" }),
    ).toEqual({ userid: "oom", username: "สรวิชญ์", fid: "F1", template: null });
  });
});

describe("parseTicketTokenBody", () => {
  it("ครบทั้งคู่ = ได้ค่าตรง ๆ (ไม่แตะค่า — HMAC ต้องคำนวณบน string ดิบ)", () => {
    const digest = sign(TICKET_DATA);
    const result = parseTicketTokenBody({ ticket_data: TICKET_DATA, HmacSha256: digest });
    ok(result);
    expect(result.ticketData).toBe(TICKET_DATA);
    expect(result.hmacHex).toBe(digest);
  });

  it("ไม่ใช่ object / มี field อื่นปน = invalid (→ 400)", () => {
    for (const raw of [[], "text", null, { ticket_data: "x", HmacSha256: "y", extra: 1 }]) {
      const result = parseTicketTokenBody(raw);
      expect(result.ok, JSON.stringify(raw)).toBe(false);
      if (!result.ok) expect(result.kind).toBe("invalid");
    }
  });

  it("ขาด field (ไม่ส่ง/ว่าง/null) = missing (→ 401 กัน oracle)", () => {
    for (const raw of [{}, { ticket_data: "" }, { HmacSha256: "y" }, { ticket_data: null, HmacSha256: "y" }]) {
      const result = parseTicketTokenBody(raw);
      expect(result.ok, JSON.stringify(raw)).toBe(false);
      if (!result.ok) expect(result.kind).toBe("missing");
    }
  });

  it("field ไม่ใช่ string / ยาวเกิน cap = invalid", () => {
    for (const raw of [
      { ticket_data: 123, HmacSha256: "y" },
      { ticket_data: "x", HmacSha256: "y".repeat(129) },
      { ticket_data: "x".repeat(2049), HmacSha256: "y" },
    ]) {
      const result = parseTicketTokenBody(raw);
      expect(result.ok, JSON.stringify(raw)).toBe(false);
      if (!result.ok) expect(result.kind).toBe("invalid");
    }
  });
});

describe("addinTicketSecret", () => {
  // env save/restore — addinTicketSecret อ่านตอนเรียก
  const ORIG_ADDIN = process.env.ADDIN_TICKET_SECRET;
  const ORIG_SECRET = process.env.SECRET;

  it("ลำดับ ADDIN_TICKET_SECRET → SECRET → default \"super_secret\" (trim ทุกตัว)", () => {
    delete process.env.ADDIN_TICKET_SECRET;
    delete process.env.SECRET;
    expect(addinTicketSecret()).toBe("super_secret");

    process.env.SECRET = "  tmpl-secret  ";
    expect(addinTicketSecret()).toBe("tmpl-secret");

    process.env.ADDIN_TICKET_SECRET = "  addin-secret  ";
    expect(addinTicketSecret()).toBe("addin-secret");

    delete process.env.ADDIN_TICKET_SECRET;
    process.env.SECRET = "   "; // ว่างล้วน = ข้ามไปตัวถัดไป
    expect(addinTicketSecret()).toBe("super_secret");

    process.env.ADDIN_TICKET_SECRET = ORIG_ADDIN;
    process.env.SECRET = ORIG_SECRET;
  });
});