import { describe, expect, it, vi } from "vitest";
import {
  mergeLocalMacros,
  parseTerminalMacros,
  sanitizeTerminalMacros,
  runTerminalMacro,
  type MacroStep,
  type TerminalMacro,
} from "../../../src/frontend/macros/terminal-macros";

function macro(steps: MacroStep[]): TerminalMacro {
  return {
    id: "macro-1",
    name: "Test",
    steps,
    createdAt: "2026-01-01T00:00:00.000Z",
    updatedAt: "2026-01-01T00:00:00.000Z",
  };
}

describe("terminal macro runner", () => {
  it("runs send, delay, regex wait, condition, and repeat steps", async () => {
    vi.useFakeTimers();
    const sent: string[] = [];
    let listener = (_data: string) => {};
    const run = runTerminalMacro(
      macro([
        { id: "send", type: "send", text: "status", pressEnter: true },
        {
          id: "wait",
          type: "wait",
          pattern: "READY\\s+42",
          timeoutMs: 1000,
          onTimeout: "stop",
        },
        {
          id: "if",
          type: "if",
          pattern: "READY",
          then: [
            {
              id: "repeat",
              type: "repeat",
              count: 2,
              steps: [
                { id: "ok", type: "send", text: "ok", pressEnter: false },
              ],
            },
          ],
          else: [],
        },
      ]),
      {
        send: (data) => sent.push(data),
        subscribe: (next) => {
          listener = next;
          return () => {};
        },
      },
    );
    await vi.advanceTimersByTimeAsync(1);
    listener("READY 42");
    await run;
    expect(sent).toEqual(["status\r", "ok", "ok"]);
    vi.useRealTimers();
  });

  it("stops when a required regex times out", async () => {
    vi.useFakeTimers();
    const run = runTerminalMacro(
      macro([
        {
          id: "wait",
          type: "wait",
          pattern: "never",
          timeoutMs: 100,
          onTimeout: "stop",
        },
      ]),
      { send: () => {}, subscribe: () => () => {} },
    );
    const rejection = expect(run).rejects.toThrow("Timed out");
    await vi.advanceTimersByTimeAsync(101);
    await rejection;
    vi.useRealTimers();
  });

  it("sanitizes persisted macro bounds and drops unknown steps", () => {
    const parsed = parseTerminalMacros(
      JSON.stringify([
        {
          id: "m",
          name: "Macro",
          steps: [
            { id: "d", type: "delay", milliseconds: 999_999 },
            { id: "r", type: "repeat", count: 1000, steps: [] },
            { id: "bad", type: "execute-javascript", code: "nope" },
          ],
        },
      ]),
    );
    expect(parsed[0].steps).toEqual([
      { id: "d", type: "delay", milliseconds: 300_000 },
      { id: "r", type: "repeat", count: 100, steps: [] },
    ]);
  });
  it("matches literal text without regex escaping when isRegex is false", async () => {
    vi.useFakeTimers();
    const sent: string[] = [];
    let listener = (_data: string) => {};
    const run = runTerminalMacro(
      macro([
        {
          id: "wait",
          type: "wait",
          pattern: "progress (1/2)",
          isRegex: false,
          timeoutMs: 1000,
          onTimeout: "stop",
        },
        { id: "send", type: "send", text: "done", pressEnter: false },
      ]),
      {
        send: (data) => sent.push(data),
        subscribe: (next) => {
          listener = next;
          return () => {};
        },
      },
    );
    await vi.advanceTimersByTimeAsync(1);
    listener("progress (1/2)");
    await run;
    expect(sent).toEqual(["done"]);
    vi.useRealTimers();
  });

  it("falls back to literal matching when a regex is invalid", async () => {
    vi.useFakeTimers();
    const sent: string[] = [];
    let listener = (_data: string) => {};
    const run = runTerminalMacro(
      macro([
        {
          id: "wait",
          type: "wait",
          pattern: "oops(",
          isRegex: true,
          timeoutMs: 1000,
          onTimeout: "stop",
        },
        { id: "send", type: "send", text: "ok", pressEnter: false },
      ]),
      {
        send: (data) => sent.push(data),
        subscribe: (next) => {
          listener = next;
          return () => {};
        },
      },
    );
    await vi.advanceTimersByTimeAsync(1);
    listener("oops(");
    await run;
    expect(sent).toEqual(["ok"]);
    vi.useRealTimers();
  });

  it("branches on literal if-step text", async () => {
    const sent: string[] = [];
    await runTerminalMacro(
      macro([
        {
          id: "if",
          type: "if",
          pattern: "a.b",
          isRegex: false,
          then: [{ id: "y", type: "send", text: "yes", pressEnter: false }],
          else: [{ id: "n", type: "send", text: "no", pressEnter: false }],
        },
      ]),
      { send: (data) => sent.push(data), subscribe: () => () => {} },
    );
    // "a.b" as a literal must not match "axb"
    expect(sent).toEqual(["no"]);
  });
});

describe("mergeLocalMacros", () => {
  function storage(value: string | null) {
    const store = new Map<string, string>();
    if (value !== null) store.set("terminalMacros", value);
    return {
      store,
      getItem: (key: string) => store.get(key) ?? null,
      removeItem: (key: string) => void store.delete(key),
    };
  }
  const saved = (id: string): TerminalMacro => ({ ...macro([]), id });

  it("returns null when the browser kept nothing", () => {
    expect(mergeLocalMacros([saved("a")], storage(null))).toBeNull();
  });

  it("adds the browser's macros the saved list does not have", () => {
    const local = storage(
      JSON.stringify([
        { id: "a", name: "Dupe", steps: [] },
        { id: "b", name: "Local", steps: [] },
      ]),
    );
    const merged = mergeLocalMacros([saved("a")], local);
    expect(merged?.macros.map((m) => m.id)).toEqual(["a", "b"]);
    expect(local.store.has("terminalMacros")).toBe(true);
    merged?.clear();
    expect(local.store.has("terminalMacros")).toBe(false);
  });

  it("clears the key when everything is already saved", () => {
    const local = storage(JSON.stringify([{ id: "a", name: "A", steps: [] }]));
    expect(mergeLocalMacros([saved("a")], local)).toBeNull();
    expect(local.store.has("terminalMacros")).toBe(false);
  });

  it("reads a stored array as well as its JSON", () => {
    expect(
      sanitizeTerminalMacros([{ id: "x", name: "X", steps: [] }]).map(
        (m) => m.id,
      ),
    ).toEqual(["x"]);
  });
});