const test = require("node:test");
const assert = require("node:assert/strict");
const fs = require("node:fs");
const vm = require("node:vm");
const path = require("node:path");

function screen(chooseMedia, upload) {
  let definition;
  const errors = [];
  vm.runInNewContext(
    fs.readFileSync(path.join(__dirname, "../pets-fe/pages/pet-edit/pet-edit.js"), "utf8"),
    {
      Page: (value) => { definition = value; },
      wx: { chooseMedia },
      require: () => ({ upload, toast: (error) => errors.push(error) }),
    },
  );
  return {
    ...definition,
    data: { ...definition.data, avatar_file_id: "original-id", avatar_url: "original-photo" },
    errors,
    setData(changes) { Object.assign(this.data, changes); },
  };
}

test("取消选择宠物照片不上传、不提示错误，保留原头像", async () => {
  let uploads = 0;
  const page = screen(
    async () => { throw { errMsg: "chooseMedia:fail cancel" }; },
    async () => { uploads++; },
  );
  await page.choose();
  assert.equal(uploads, 0);
  assert.equal(page.errors.length, 0);
  assert.equal(page.data.avatar_file_id, "original-id");
  assert.equal(page.data.avatar_url, "original-photo");
});

test("空的照片选择结果不上传", async () => {
  const page = screen(async () => ({ tempFiles: [] }), async () => assert.fail("不应上传"));
  await page.choose();
  assert.equal(page.errors.length, 0);
  assert.equal(page.data.avatar_file_id, "original-id");
});

test("实际选择失败仍提示错误", async () => {
  const error = { errMsg: "chooseMedia:fail permission denied" };
  const page = screen(async () => { throw error; }, async () => assert.fail("不应上传"));
  await page.choose();
  assert.equal(page.errors[0], error);
});

test("实际上传失败仍提示错误并保留原头像", async () => {
  const error = new Error("上传失败");
  const page = screen(
    async () => ({ tempFiles: [{ tempFilePath: "/tmp/photo.jpg" }] }),
    async () => { throw error; },
  );
  await page.choose();
  assert.equal(page.errors[0], error);
  assert.equal(page.data.avatar_file_id, "original-id");
});

test("上传成功后更新宠物头像", async () => {
  const page = screen(
    async () => ({ tempFiles: [{ tempFilePath: "/tmp/photo.jpg" }] }),
    async (filePath) => {
      assert.equal(filePath, "/tmp/photo.jpg");
      return { id: "new-id", url: "new-photo" };
    },
  );
  await page.choose();
  assert.equal(page.errors.length, 0);
  assert.equal(page.data.avatar_file_id, "new-id");
  assert.equal(page.data.avatar_url, "new-photo");
});