import fs from "node:fs/promises";
import os from "node:os";
import path from "node:path";
import { Command } from "commander";
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import { defaultRuntime } from "../../runtime.js";

const callGatewayFromCli = vi.fn();

vi.mock("../gateway-rpc.js", async () => {
  const actual = await vi.importActual<typeof import("../gateway-rpc.js")>("../gateway-rpc.js");
  return {
    ...actual,
    callGatewayFromCli: (...args: Parameters<typeof actual.callGatewayFromCli>) =>
      callGatewayFromCli(...args),
  };
});

const { registerCronAddCommand } = await import("./register.cron-add.js");
const { registerCronEditCommand } = await import("./register.cron-edit.js");
const { readCronPayloadScript, readCronTriggerScript } = await import("./trigger-options.js");

describe("cron trigger CLI options", () => {
  let fixtureRoot = "";

  beforeEach(async () => {
    fixtureRoot = await fs.mkdtemp(path.join(os.tmpdir(), "cron-trigger-cli-"));
    callGatewayFromCli.mockReset();
    callGatewayFromCli.mockResolvedValue({ ok: true });
  });

  afterEach(async () => {
    await fs.rm(fixtureRoot, { recursive: true, force: true });
  });

  it("advertises every canonical thinking level on add and edit", () => {
    const program = new Command().exitOverride();
    registerCronAddCommand(program);
    registerCronEditCommand(program);

    for (const commandName of ["add", "edit"]) {
      const help = program.commands
        .find((command) => command.name() === commandName)
        ?.helpInformation();
      expect(help).toContain("off|minimal|low|medium|high|xhigh|adaptive|max|ultra");
    }
  });

  it.each(["watch.js", "watch.js "])("reads trigger file %j on add", async (fileName) => {
    const scriptPath = path.join(fixtureRoot, fileName);
    await fs.writeFile(path.join(fixtureRoot, "watch.js"), "json({ fire: false })", "utf8");
    await fs.writeFile(scriptPath, "  json({ fire: true })  \n", "utf8");
    const program = new Command().exitOverride();
    registerCronAddCommand(program);

    await program.parseAsync(
      [
        "add",
        "--name",
        "watcher",
        "--every",
        "30s",
        "--trigger-script",
        scriptPath,
        "--trigger-once",
        "--system-event",
        "changed",
        "--session",
        "main",
      ],
      { from: "user" },
    );

    expect(callGatewayFromCli).toHaveBeenCalledWith(
      "cron.add",
      expect.objectContaining({ triggerScript: scriptPath, triggerOnce: true }),
      expect.objectContaining({
        trigger: { script: "json({ fire: true })", once: true },
      }),
    );
  });

  it.each([
    ["empty", ""],
    ["whitespace", "   "],
  ])("rejects an explicitly %s trigger script before adding a job", async (_label, value) => {
    const program = new Command().exitOverride();
    registerCronAddCommand(program);
    const errorSpy = vi.spyOn(defaultRuntime, "error").mockImplementation(() => {});

    try {
      await expect(
        program.parseAsync(
          [
            "add",
            "--name",
            "watcher",
            "--every",
            "30s",
            "--trigger-script",
            value,
            "--system-event",
            "changed",
            "--session",
            "main",
          ],
          { from: "user" },
        ),
      ).rejects.toMatchObject({ name: "ExitError", code: 1 });

      expect(errorSpy).toHaveBeenCalledWith(
        expect.stringContaining("--trigger-script must not be blank"),
      );
      expect(callGatewayFromCli).not.toHaveBeenCalled();
    } finally {
      errorSpy.mockRestore();
    }
  });

  it.each(["job.js", "job.js "])("reads payload file %j and budgets on add", async (fileName) => {
    const scriptPath = path.join(fixtureRoot, fileName);
    await fs.writeFile(path.join(fixtureRoot, "job.js"), "return { notify: 'wrong file' }", "utf8");
    await fs.writeFile(scriptPath, "  return { notify: 'done' }  \n", "utf8");
    const program = new Command().exitOverride();
    registerCronAddCommand(program);

    await program.parseAsync(
      [
        "add",
        "--name",
        "script job",
        "--every",
        "30s",
        "--script",
        scriptPath,
        "--script-timeout-seconds",
        "450",
        "--script-tool-budget",
        "75",
        "--session",
        "isolated",
      ],
      { from: "user" },
    );

    expect(callGatewayFromCli).toHaveBeenCalledWith(
      "cron.add",
      expect.objectContaining({
        script: scriptPath,
        scriptTimeoutSeconds: "450",
        scriptToolBudget: "75",
      }),
      expect.objectContaining({
        sessionTarget: "isolated",
        payload: {
          kind: "script",
          script: "return { notify: 'done' }",
          timeoutSeconds: 450,
          toolBudget: 75,
        },
      }),
    );
  });

  it.each([
    { label: "generic timeout only", args: ["--timeout-seconds", "30"] },
    {
      label: "generic and script-specific timeouts",
      args: ["--timeout-seconds", "30", "--script-timeout-seconds", "60"],
    },
  ])("rejects script creation with $label", async ({ args }) => {
    const scriptPath = path.join(fixtureRoot, "job.js");
    await fs.writeFile(scriptPath, "return { notify: 'done' }", "utf8");
    const program = new Command().exitOverride();
    registerCronAddCommand(program);
    const errorSpy = vi.spyOn(defaultRuntime, "error").mockImplementation(() => {});

    try {
      await expect(
        program.parseAsync(
          ["add", "--name", "script job", "--every", "30s", "--script", scriptPath, ...args],
          { from: "user" },
        ),
      ).rejects.toMatchObject({ name: "ExitError", code: 1 });
      expect(errorSpy).toHaveBeenCalledWith(
        expect.stringContaining(
          "Use --script-timeout-seconds for script jobs, not --timeout-seconds.",
        ),
      );
      expect(callGatewayFromCli).not.toHaveBeenCalled();
    } finally {
      errorSpy.mockRestore();
    }
  });

  it.each(["edit-job.js", "edit-job.js "])("reads payload file %j on edit", async (fileName) => {
    const scriptPath = path.join(fixtureRoot, fileName);
    await fs.writeFile(
      path.join(fixtureRoot, "edit-job.js"),
      "return { state: { ok: false } }",
      "utf8",
    );
    await fs.writeFile(scriptPath, "return { state: { ok: true } }\n", "utf8");
    const program = new Command().exitOverride();
    registerCronEditCommand(program);

    await program.parseAsync(
      [
        "edit",
        "job-1",
        "--script",
        scriptPath,
        "--script-timeout-seconds",
        "600",
        "--script-tool-budget",
        "100",
      ],
      { from: "user" },
    );

    expect(callGatewayFromCli).toHaveBeenCalledWith(
      "cron.update",
      expect.objectContaining({ script: scriptPath }),
      {
        id: "job-1",
        patch: {
          payload: {
            kind: "script",
            script: "return { state: { ok: true } }",
            timeoutSeconds: 600,
            toolBudget: 100,
          },
        },
      },
    );
  });

  it("sends pacing bounds on add", async () => {
    const program = new Command().exitOverride();
    registerCronAddCommand(program);

    await program.parseAsync(
      [
        "add",
        "--name",
        "paced",
        "--every",
        "30m",
        "--pacing-min",
        "15m",
        "--pacing-max",
        "4h",
        "--system-event",
        "check",
        "--session",
        "main",
      ],
      { from: "user" },
    );

    expect(callGatewayFromCli).toHaveBeenCalledWith(
      "cron.add",
      expect.anything(),
      expect.objectContaining({ pacing: { min: "15m", max: "4h" } }),
    );
  });

  it("accepts trigger script files at the byte limit", async () => {
    const scriptPath = path.join(fixtureRoot, "at-limit.js");
    await fs.writeFile(scriptPath, "x".repeat(65_536), "utf8");

    await expect(readCronTriggerScript(scriptPath)).resolves.toHaveLength(65_536);
  });

  it("uses the same size and empty-input validation for payload scripts", async () => {
    const atLimitPath = path.join(fixtureRoot, "payload-at-limit.js");
    const emptyPath = path.join(fixtureRoot, "payload-empty.js");
    await fs.writeFile(atLimitPath, "x".repeat(65_536), "utf8");
    await fs.writeFile(emptyPath, " \n", "utf8");

    await expect(readCronPayloadScript(atLimitPath)).resolves.toHaveLength(65_536);
    await expect(readCronPayloadScript(emptyPath)).rejects.toThrow(
      "Script payload must not be empty",
    );
  });

  it("stops oversized trigger script files before the gateway call", async () => {
    const scriptPath = path.join(fixtureRoot, "oversized.js");
    await fs.writeFile(scriptPath, "x".repeat(65_537), "utf8");
    const program = new Command().exitOverride();
    registerCronAddCommand(program);
    const errorSpy = vi.spyOn(defaultRuntime, "error").mockImplementation(() => {});

    try {
      await expect(
        program.parseAsync(
          [
            "add",
            "--name",
            "oversized",
            "--every",
            "30s",
            "--trigger-script",
            scriptPath,
            "--system-event",
            "changed",
            "--session",
            "main",
          ],
          { from: "user" },
        ),
      ).rejects.toMatchObject({ name: "ExitError", code: 1 });

      expect(errorSpy).toHaveBeenCalledWith(
        expect.stringContaining("Trigger script exceeds 65536 bytes"),
      );
      expect(callGatewayFromCli).not.toHaveBeenCalled();
    } finally {
      errorSpy.mockRestore();
    }
  });

  it("maps --clear-trigger to a nullable edit patch", async () => {
    const program = new Command().exitOverride();
    registerCronEditCommand(program);

    await program.parseAsync(["edit", "job-1", "--clear-trigger"], { from: "user" });

    expect(callGatewayFromCli).toHaveBeenCalledWith(
      "cron.update",
      expect.objectContaining({ clearTrigger: true }),
      { id: "job-1", patch: { trigger: null } },
    );
  });

  it("maps --clear-pacing to a nullable edit patch", async () => {
    const program = new Command().exitOverride();
    registerCronEditCommand(program);

    await program.parseAsync(["edit", "job-1", "--clear-pacing"], { from: "user" });

    expect(callGatewayFromCli).toHaveBeenCalledWith(
      "cron.update",
      expect.objectContaining({ clearPacing: true }),
      { id: "job-1", patch: { pacing: null } },
    );
  });
});