/**
 * Kit CLI Extension
 *
 * WHAT: developer-experience commands for the corporate kit.
 *   /kit-doctor — environment health check (node, kit version, config, env vars,
 *                 env.sh, loaded commands/skills). Read-only, offline-safe.
 *   /kit-help   — catalog of everything this package provides (commands, skills,
 *                 guardrails).
 *
 * CONFIGURE: nothing to configure. Values are read from config/company.json and
 *       the environment. (`/kit-config` — in company-context.ts — shows the
 *       effective corporate config.)
 *
 * DISABLE: remove/rename this file from the package `extensions/` folder.
 */

import * as fs from "node:fs";
import * as os from "node:os";
import * as path from "node:path";
import { fileURLToPath } from "node:url";
import type { ExtensionAPI } from "@earendil-works/pi-coding-agent";

const HERE = path.dirname(fileURLToPath(import.meta.url));
const PKG_ROOT = path.join(HERE, "..");
const CONFIG_PATH = path.join(PKG_ROOT, "config", "company.json");
const ENV_FILE = path.join(os.homedir(), ".config", "pi-kit", "env.sh");

const PROVIDER_KEYS = ["ANTHROPIC_API_KEY", "OPENAI_API_KEY", "OPENROUTER_API_KEY", "GEMINI_API_KEY", "GOOGLE_API_KEY"];

// Guardrail extensions don't register commands, so list them statically here.
const GUARDRAILS: Array<[string, string]> = [
	["protected-paths", "блок записи в секреты/ключи/.git/прод-конфиги (по пути)"],
	["permission-gate", "подтверждение опасных bash (rm -rf, force push, release-*/v* деплой, sudo …)"],
	["secret-scanner", "блок записи контента, похожего на секрет"],
	["commit-guard", "Conventional Commits + скан секретов в сообщении коммита"],
	["llm-redaction", "редакция секретов из payload перед отправкой в LLM"],
	["audit-log", "локальный аудит (~/.config/pi-kit/audit.jsonl)"],
];

function readVersion(): string {
	try {
		return JSON.parse(fs.readFileSync(path.join(PKG_ROOT, "package.json"), "utf8")).version ?? "?";
	} catch {
		return "?";
	}
}

function readConfig(): Record<string, unknown> {
	try {
		return JSON.parse(fs.readFileSync(CONFIG_PATH, "utf8"));
	} catch {
		return {};
	}
}

/** Show lines in a dismissable selector (UI) or as a notification (no UI). */
async function show(ctx: any, title: string, lines: string[]): Promise<void> {
	if (ctx.hasUI) await ctx.ui.select(title, lines);
	else ctx.ui.notify(`${title}\n${lines.join("\n")}`, "info");
}

export default function kitCliExtension(pi: ExtensionAPI) {
	pi.registerCommand("kit-doctor", {
		description: "Проверка окружения pi-kit (node, версия, конфиг, env, токены)",
		handler: async (_args, ctx) => {
			const ok = (s: string) => `✓ ${s}`;
			const warn = (s: string) => `⚠ ${s}`;
			const cfg = readConfig();
			const lines: string[] = [];

			lines.push(ok(`Node.js ${process.version}`));
			lines.push(ok(`pi-kit v${readVersion()}${process.env.PI_KIT_CHANNEL ? ` (канал: ${process.env.PI_KIT_CHANNEL})` : ""}`));

			// Config
			const cfgOk = typeof cfg.gitHost === "string" && cfg.gitHost !== "TODO";
			lines.push((cfgOk ? ok : warn)(`config: gitHost=${cfg.gitHost ?? "?"}, tracker=${cfg.trackerUrl ?? "?"}, docs=${cfg.docsUrl ?? "?"}`));
			if (cfg.remoteConfigUrl) lines.push(ok(`remoteConfigUrl задан`));

			// Env vars (presence only, never values)
			for (const v of ["TRACKER_URL", "JIRA_TOKEN", "GITLAB_TOKEN"]) {
				lines.push((process.env[v] ? ok : warn)(`${v} ${process.env[v] ? "задан" : "не задан"}`));
			}
			const provider = PROVIDER_KEYS.find((k) => process.env[k]);
			lines.push((provider ? ok : warn)(provider ? `LLM-ключ: ${provider}` : "LLM-ключ провайдера не найден"));

			// env.sh
			lines.push((fs.existsSync(ENV_FILE) ? ok : warn)(`env.sh ${fs.existsSync(ENV_FILE) ? "есть" : "нет"} (${ENV_FILE})`));

			// Loaded commands/skills
			const cmds = pi.getCommands();
			const skills = cmds.filter((c) => c.source === "skill").length;
			lines.push(ok(`команд загружено: ${cmds.length} (скилов: ${skills})`));

			const warns = lines.filter((l) => l.startsWith("⚠")).length;
			lines.push("", warns === 0 ? "Итог: всё ок." : `Итог: предупреждений — ${warns}.`);
			await show(ctx, "pi-kit doctor", lines);
		},
	});

	pi.registerCommand("kit-help", {
		description: "Каталог возможностей pi-kit (команды, скилы, guardrails)",
		handler: async (_args, ctx) => {
			const cmds = pi.getCommands();
			const mine = cmds.filter((c) => c.sourceInfo?.path?.startsWith(PKG_ROOT));
			const bySource = (src: string) =>
				mine
					.filter((c) => c.source === src)
					.sort((a, b) => a.name.localeCompare(b.name))
					.map((c) => `  /${c.name}${c.description ? ` — ${c.description}` : ""}`);

			const lines: string[] = [];
			lines.push("— Команды —", ...bySource("extension"), ...bySource("prompt"));
			lines.push("", "— Скилы —", ...bySource("skill"));
			lines.push("", "— Guardrails (расширения) —", ...GUARDRAILS.map(([n, d]) => `  ${n} — ${d}`));
			await show(ctx, "pi-kit help", lines);
		},
	});
}