import assert from "node:assert/strict";
import fs from "node:fs";
import os from "node:os";
import path from "node:path";
import test from "node:test";
import type { DiscoveredBackend } from "../src/acp/discovery.js";
import { loadConfigFile, writeConfigFile } from "../src/cli/config-file.js";
import type { Choice, PromptSession } from "../src/cli/prompt.js";
import { runSetup } from "../src/cli/setup.js";
import { parseConfig } from "../src/config.js";

const testSecret = "test-webhook-secret";
const readyAgent: DiscoveredBackend = {
  id: "test-agent",
  command: process.execPath,
  args: ["test/fixtures/fake-acp-agent.mjs"],
  status: "ready"
};

class FakePrompt implements PromptSession {
  readonly defaults = new Map<string, string | undefined>();
  closeCount = 0;

  constructor(
    private readonly answers: Record<string, string[]> = {},
    private readonly secretAnswer = testSecret
  ) {}

  async ask(question: string, defaultValue?: string): Promise<string> {
    this.defaults.set(question, defaultValue);
    const queued = this.answers[question];
    return queued && queued.length > 0 ? queued.shift()! : defaultValue || "";
  }

  async askSecret(): Promise<string> { return this.secretAnswer; }
  async askBoolean(_question: string, defaultValue = false): Promise<boolean> { return defaultValue; }
  async askList(_question: string, defaultValues: string[] = []): Promise<string[]> { return defaultValues; }

  async choose<T>(_question: string, choices: Choice<T>[], defaultIndex = 0): Promise<T> {
    return (choices.find((choice) => choice.label === "Generic webhook") || choices[defaultIndex] || choices[0]).value;
  }

  close(): void { this.closeCount++; }
}

function peerConfig(port: number): unknown {
  return {
    configVersion: 3,
    bot: {
      id: "peer-bot",
      workspace: os.tmpdir(),
      persona: "peer",
      agent: { id: readyAgent.id, command: readyAgent.command, args: readyAgent.args, env: {} },
      skills: [],
      permissions: { mode: "deny", allowedTools: [], allowedCommandPatterns: [] }
    },
    gateway: {
      server: { host: "127.0.0.1", port, publicBaseUrl: "" },
      policy: { allowedUsers: [], allowedChats: [], requireMentionInGroup: true },
      platform: { type: "webhook", secret: "peer-test-secret" }
    },
    runtime: {}
  };
}

function existingConfig(host = "0.0.0.0", port = 8787) {
  return parseConfig({
    configVersion: 3,
    bot: {
      id: "existing-bot",
      workspace: os.tmpdir(),
      persona: "existing persona",
      agent: { id: readyAgent.id, command: readyAgent.command, args: readyAgent.args, env: {} },
      skills: [],
      permissions: { mode: "deny", allowedTools: [], allowedCommandPatterns: [] }
    },
    gateway: {
      server: { host, port, publicBaseUrl: "https://public.example.test" },
      policy: { allowedUsers: [], allowedChats: [], requireMentionInGroup: true },
      platform: { type: "webhook", secret: testSecret }
    },
    runtime: {}
  });
}

test("new setup suggests the next unassigned instance port", async (t) => {
  const root = fs.mkdtempSync(path.join(os.tmpdir(), "gori-setup-new-"));
  t.after(() => fs.rmSync(root, { recursive: true, force: true }));
  for (const [name, port] of [["peer-one", 8787], ["peer-two", 8788]] as const) {
    const directory = path.join(root, name);
    fs.mkdirSync(directory);
    fs.writeFileSync(path.join(directory, "config.json"), JSON.stringify(peerConfig(port)));
  }

  const target = path.join(root, "new-bot", "config.json");
  const prompt = new FakePrompt();
  const messages: string[] = [];
  await runSetup(target, {
    botId: "new-bot",
    requireNew: true,
    writeWithoutConfirmation: true,
    prompt,
    discoverAgents: async () => [readyAgent],
    instancesDirectory: root,
    log: (message) => messages.push(message)
  });

  const config = loadConfigFile(target).config;
  assert.equal(prompt.defaults.get("Gateway server port"), "8789");
  assert.equal(config.gateway.server.port, 8789);
  assert.equal(config.gateway.server.host, "0.0.0.0");
  assert.equal(fs.statSync(target).mode & 0o777, 0o600);
  assert.equal(prompt.closeCount, 1);
  assert.ok(messages.some((message) => message.includes("suggested port: 8789")));
  assert.ok(messages.every((message) => !message.includes(testSecret)));
});

test("existing setup can change host and port while preserving public URL and secret", async (t) => {
  const root = fs.mkdtempSync(path.join(os.tmpdir(), "gori-setup-existing-"));
  t.after(() => fs.rmSync(root, { recursive: true, force: true }));
  const target = path.join(root, "existing-bot", "config.json");
  writeConfigFile(target, existingConfig());
  const peerDirectory = path.join(root, "peer");
  fs.mkdirSync(peerDirectory);
  fs.writeFileSync(path.join(peerDirectory, "config.json"), JSON.stringify(peerConfig(8787)));

  const prompt = new FakePrompt({
    "Gateway server host": ["http://bad-host", "127.0.0.1"],
    "Gateway server port": ["not-a-port", "9001"]
  }, "");
  const messages: string[] = [];
  await runSetup(target, {
    botId: "existing-bot",
    writeWithoutConfirmation: true,
    prompt,
    discoverAgents: async () => [readyAgent],
    instancesDirectory: root,
    log: (message) => messages.push(message)
  });

  const config = loadConfigFile(target).config;
  assert.equal(prompt.defaults.get("Gateway server port"), "8787");
  assert.equal(config.gateway.server.host, "127.0.0.1");
  assert.equal(config.gateway.server.port, 9001);
  assert.equal(config.gateway.server.publicBaseUrl, "https://public.example.test");
  assert.equal(config.gateway.platform.type, "webhook");
  assert.equal(config.gateway.platform.secret, testSecret);
  assert.equal(prompt.closeCount, 1);
  assert.ok(messages.some((message) => message.startsWith("ERROR: server host")));
  assert.ok(messages.some((message) => message.startsWith("ERROR: server port")));
  assert.ok(messages.some((message) => message.includes("suggested port: 8788")));
  assert.ok(messages.every((message) => !message.includes(testSecret)));
});

test("existing setup keeps host and port when defaults are accepted", async (t) => {
  const root = fs.mkdtempSync(path.join(os.tmpdir(), "gori-setup-keep-server-"));
  t.after(() => fs.rmSync(root, { recursive: true, force: true }));
  const target = path.join(root, "existing-bot", "config.json");
  writeConfigFile(target, existingConfig("localhost", 9123));

  const prompt = new FakePrompt({}, "");
  await runSetup(target, {
    botId: "existing-bot",
    writeWithoutConfirmation: true,
    prompt,
    discoverAgents: async () => [readyAgent],
    instancesDirectory: root,
    log: () => undefined
  });

  const config = loadConfigFile(target).config;
  assert.equal(prompt.defaults.get("Gateway server host"), "localhost");
  assert.equal(prompt.defaults.get("Gateway server port"), "9123");
  assert.equal(config.gateway.server.host, "localhost");
  assert.equal(config.gateway.server.port, 9123);
  assert.equal(prompt.closeCount, 1);
});