#!/usr/bin/env bun
/**
 * Zesdex CLI — main entry point.
 *
 * Zesdex is a pure CLI/TUI tool:
 *   - `zesdex`                  → boots the interactive OpenTUI (primary interface)
 *   - `zesdex --headless "<p>"` → runs a single one-shot agent turn and exits
 *
 * All server modes (REST API / WebSocket / gRPC / web / daemon) were removed in
 * the "full cli tui" rombak. The TUI owns the interactive agent runtime; this
 * entry point only routes to it or runs a one-shot headless turn.
 */
import * as fs from "node:fs";
import * as os from "node:os";
import * as path from "node:path";
import { parseCli } from "./args.ts";

/** Initialise file logging (append to <data-dir>/zesdex/zesdex.log). */
function initLogging(): void {
  const dataDir = os.homedir();
  const logDir = path.join(dataDir, ".local", "share", "zesdex");
  fs.mkdirSync(logDir, { recursive: true });
  const logPath = path.join(logDir, "zesdex.log");
  const stream = fs.createWriteStream(logPath, { flags: "a" });
  const originalLog = console.log;
  const originalError = console.error;

  const write = (level: string, args: unknown[]) => {
    const line = `[${new Date().toISOString()}] ${level} ${args
      .map((a) => (typeof a === "string" ? a : JSON.stringify(a)))
      .join(" ")}`;
    stream.write(line + "\n");
    if (level === "ERROR") originalError(...args);
    else originalLog(...args);
  };

  console.log = (...a: unknown[]) => write("LOG", a);
  console.info = (...a: unknown[]) => write("INFO", a);
  console.warn = (...a: unknown[]) => write("WARN", a);
  console.error = (...a: unknown[]) => write("ERROR", a);
}

/** Run a single one-shot agent turn non-interactively, printing the outcome. */
async function runHeadless(prompt: string): Promise<void> {
  const { runSingleProcess, buildTurnParams } = await import("./compose.ts");
  const runtime = await runSingleProcess();

  const events: import("@zesdex/domain").TurnEvent[] = [];
  const abort = new AbortController();
  const params = buildTurnParams(runtime, prompt, events, abort);

  await runtime.turnService.runTurn(params);

  const tokens: string[] = [];
  for (const ev of events) {
    if (ev.kind === "stream_token") tokens.push(ev.content);
  }
  const full = tokens.join("");
  process.stdout.write("\n");
  if (full.trim() !== "") console.log(full.trim());
  else console.log("(no response content)");
}

/** Main entry. `zesdex` → TUI; `--headless <prompt>` → one-shot turn. */
async function main(): Promise<void> {
  initLogging();

  const args = process.argv.slice(2);
  let parsed;
  try {
    parsed = parseCli(args);
  } catch (e) {
    console.error((e as Error).message);
    process.exit(2);
  }

  if ("help" in parsed) {
    console.log(parsed.text);
    process.exit(0);
  }

  if (parsed.headless !== null) {
    await runHeadless(parsed.headless);
    process.exit(0);
  }

  // Default: boot the interactive TUI.
  const { runTui } = await import("@zesdex/tui");
  await runTui();
  process.exit(0);
}

main().catch((e) => {
  console.error(e instanceof Error ? e.message : String(e));
  process.exit(1);
});