import { describe, expect, test } from "bun:test";
import { notifyReplyCommentCreated, type NotifyDeps, type ReceiverTarget } from "./index";

function createDeps() {
  const state = {
    sendMailCalled: false,
  };
  const deps: NotifyDeps = {
    getParentReceiver: async (): Promise<ReceiverTarget | null> => ({ kind: "user", userId: 2 }),
    getGlobalConfig: async () => ({
      enabled: true,
      fromEmail: "noreply@example.com",
      smtpHost: "smtp.example.com",
      smtpPort: 465,
      smtpSecure: true,
      smtpUser: "smtp-user",
      smtpPass: "smtp-pass",
    }),
    getReceiverNotifyEnabled: async () => true,
    getReceiverProfile: async () => ({
      email: "receiver@example.com",
      username: "receiver",
      nickname: "Receiver",
    }),
    sendMail: async () => {
      state.sendMailCalled = true;
    },
  };

  return {
    state,
    deps,
  };
}

describe("notifyReplyCommentCreated", () => {
  test("全局开关关闭 -> 不发送", async () => {
    const { deps, state } = createDeps();
    deps.getGlobalConfig = async () => ({
      enabled: false,
      fromEmail: "noreply@example.com",
      smtpHost: "smtp.example.com",
      smtpPort: 465,
      smtpSecure: true,
      smtpUser: "smtp-user",
      smtpPass: "smtp-pass",
    });

    await notifyReplyCommentCreated(
      { postId: 10, postOwnerUserId: 2, commentId: 200, parentId: 100, actorUserId: 1, replyBody: "hello" },
      deps,
    );

    expect(state.sendMailCalled).toBe(false);
  });

  test("用户偏好关闭 -> 不发送", async () => {
    const { deps, state } = createDeps();
    deps.getReceiverNotifyEnabled = async () => false;

    await notifyReplyCommentCreated(
      { postId: 10, postOwnerUserId: 2, commentId: 201, parentId: 100, actorUserId: 1, replyBody: "hello" },
      deps,
    );

    expect(state.sendMailCalled).toBe(false);
  });

  test("无 parentId -> 通知文章作者", async () => {
    const { deps, state } = createDeps();

    await notifyReplyCommentCreated(
      { postId: 10, postOwnerUserId: 2, commentId: 202, parentId: null, actorUserId: 1, replyBody: "hello" },
      deps,
    );

    expect(state.sendMailCalled).toBe(true);
  });

  test("自通知 -> 不发送", async () => {
    const { deps, state } = createDeps();
    deps.getParentReceiver = async () => ({ kind: "user", userId: 1 });

    await notifyReplyCommentCreated(
      { postId: 10, postOwnerUserId: 2, commentId: 203, parentId: 100, actorUserId: 1, replyBody: "hello" },
      deps,
    );

    expect(state.sendMailCalled).toBe(false);
  });

  test("发送异常 -> 不抛出（best-effort）", async () => {
    const { deps } = createDeps();
    deps.sendMail = async () => {
      throw new Error("smtp send failed");
    };

    await expect(
      notifyReplyCommentCreated(
        { postId: 10, postOwnerUserId: 2, commentId: 204, parentId: 100, actorUserId: 1, replyBody: "hello" },
        deps,
      ),
    ).resolves.toBeUndefined();
  });

  test("接收方邮箱非法 -> 不发送", async () => {
    const { deps, state } = createDeps();
    deps.getReceiverProfile = async () => ({
      email: "not-an-email",
      username: "receiver",
      nickname: "Receiver",
    });

    await notifyReplyCommentCreated(
      { postId: 10, postOwnerUserId: 2, commentId: 205, parentId: 100, actorUserId: 1, replyBody: "hello" },
      deps,
    );

    expect(state.sendMailCalled).toBe(false);
  });

  test("回复游客（有邮箱且非匿名）-> 发送邮件到游客邮箱", async () => {
    const { deps, state } = createDeps();
    deps.getParentReceiver = async () => ({ kind: "guest", email: "guest@example.com" });

    await notifyReplyCommentCreated(
      { postId: 10, postOwnerUserId: 2, commentId: 206, parentId: 100, actorUserId: 1, replyBody: "hello" },
      deps,
    );

    expect(state.sendMailCalled).toBe(true);
  });

  test("游客回复自己（同邮箱）-> 不发送", async () => {
    const { deps, state } = createDeps();
    deps.getParentReceiver = async () => ({ kind: "guest", email: "guest@example.com" });

    await notifyReplyCommentCreated(
      {
        postId: 10,
        postOwnerUserId: 2,
        commentId: 207,
        parentId: 100,
        actorUserId: null,
        actorGuestEmail: "guest@example.com",
        replyBody: "hello",
      },
      deps,
    );

    expect(state.sendMailCalled).toBe(false);
  });
});