/**
 * omoa-toggle.mjs — OpenCode skill to toggle oh-my-openagent on/off
 *
 * PURPOSE:
 *   Provides a single Telegram command to toggle oh-my-openagent on/off.
 *   Creates or deletes a state file, then restarts the OpenCode server.
 *
 * HOW IT WORKS:
 *   - State file: ~/.config/opencode/omoa-enabled
 *   - If state file exists → omoa is enabled
 *   - If state file does not exist → omoa is disabled
 *   - The opencode-start.sh script checks for this state file at startup
 *   - If present, it injects omoa via OPENCODE_CONFIG_CONTENT
 *   - If absent, it starts OpenCode vanilla (no omoa)
 *
 * USAGE:
 *   In Telegram: /commands → omoa_toggle
 *   Actions:
 *     - on:     Create state file, restart server (enables omoa)
 *     - off:    Delete state file, restart server (disables omoa)
 *     - status: Check if state file exists
 *
 * UPSTREAM COMPATIBILITY:
 *   This approach does NOT modify opencode.json directly.
 *   The upstream install script can run safely — use omoa-post-upgrade.sh
 *   to clean the plugin entry from opencode.json after running the installer.
 *
 * UPSTREAM REPO:
 *   https://git.hibbhome.com/Hibbhome/opencode-omoa-toggle
 *
 * CREATED: 2026-05-03
 */

import { tool } from "@opencode-ai/plugin/tool";
import { execSync } from "node:child_process";
import { existsSync, writeFileSync, unlinkSync } from "node:fs";

const STATE_FILE = "/home/kenny/.config/opencode/omoa-enabled";

export const OmoaTogglePlugin = async (_ctx) => {
  return {
    tool: {
      omoa_toggle: tool({
        description: "Toggle oh-my-openagent on or off",
        args: {
          action: tool.schema.enum(["on", "off", "status"]).describe("Action: on, off, or status"),
        },
        async execute(args) {
          try {
            if (args.action === "status") {
              return existsSync(STATE_FILE)
                ? "oh-my-openagent is ENABLED (state file exists)"
                : "oh-my-openagent is DISABLED (no state file)";
            }

            if (args.action === "on") {
              // Create state file to enable omoa
              writeFileSync(STATE_FILE, new Date().toISOString());
              
              // Restart the OpenCode server
              execSync("systemctl --user restart opencode-serve.service");
              
              return "oh-my-openagent ENABLED. Server restarting...";
            }

            if (args.action === "off") {
              // Delete state file to disable omoa
              if (existsSync(STATE_FILE)) {
                unlinkSync(STATE_FILE);
              }
              
              // Restart the OpenCode server
              execSync("systemctl --user restart opencode-serve.service");
              
              return "oh-my-openagent DISABLED. Server restarting...";
            }

            return "Invalid action. Use: on, off, or status";
          } catch (err) {
            return `Error: ${err.message}`;
          }
        },
      }),
    },
  };
};