import { describe, it, expect } from "bun:test";
import { UsageError, ConfigError, InternalError } from "../../src/cli/errors.ts";
import { mapError } from "../../src/cli.ts";

describe("mapError", () => {
  it("CliError 原样返回", () => {
    const err = new ConfigError("未初始化");
    const result = mapError(err);
    expect(result).toBe(err);
    expect(result.message).toBe("未初始化");
  });

  it("Unknown option 转为 UsageError", () => {
    const err = new Error("Unknown option `--badflag`");
    const result = mapError(err);
    expect(result).toBeInstanceOf(UsageError);
    expect(result.message).toBe("未知选项: --badflag");
    expect(result.hint).toBe("运行 rune help 查看所有命令");
  });

  it("Unknown command 转为 UsageError", () => {
    const err = new Error("Unknown command `foo`");
    const result = mapError(err);
    expect(result).toBeInstanceOf(UsageError);
    expect(result.message).toBe("未知命令: foo");
  });

  it("Unused args 转为 UsageError", () => {
    const err = new Error("Unused args: --extra");
    const result = mapError(err);
    expect(result).toBeInstanceOf(UsageError);
    expect(result.message).toContain("未知命令");
    expect(result.message).toContain("--extra");
  });

  it("missing required args 转为 UsageError", () => {
    const err = new Error("missing required args for command `plan`");
    const result = mapError(err);
    expect(result).toBeInstanceOf(UsageError);
    expect(result.message).toBe("命令 'plan' 缺少必填参数");
    expect(result.usage).toBe("rune plan <change-name>");
    expect(result.hint).toContain("rune help plan");
  });

  it("未知 Error 转为 InternalError", () => {
    const err = new Error("something unexpected");
    const result = mapError(err);
    expect(result).toBeInstanceOf(InternalError);
    expect(result.message).toBe("发生了未预期的错误");
  });

  it("非 Error 类型转为 InternalError", () => {
    const result = mapError("字符串错误");
    expect(result).toBeInstanceOf(InternalError);
  });
});