import {
  loadConfig,
  saveConfig,
  loadCache,
  saveCache,
  ONE_DAY,
  TWO_HOURS,
  DEFAULT_ENDPOINT,
  type Cache,
} from "./config.js";
import { api, trySyncRemote } from "./api.js";

export function shouldAutoSync(cache: Cache | null): boolean {
  if (!cache) return true;
  const now = Date.now();
  const syncedAt = new Date(cache.synced_at).getTime();
  const attemptedAt = new Date(cache.attempted_at || cache.synced_at).getTime();
  if (syncedAt >= attemptedAt && now - syncedAt < ONE_DAY) {
    return false;
  }
  if (now - attemptedAt < TWO_HOURS) {
    return false;
  }
  return true;
}

export async function cmdSync(): Promise<void> {
  const { data } = await api("GET", "/config");
  if (!data?.secrets) {
    console.error("No secrets found");
    process.exit(1);
  }
  const now = new Date().toISOString();
  const cache = {
    agent_id: data.agent_id,
    secrets: data.secrets,
    synced_at: now,
    attempted_at: now,
  };
  saveCache(cache);
  const count = Object.keys(cache.secrets).length;
  console.log(`✓ Synced ${count} keys (agent: ${cache.agent_id})`);
}

export async function cmdEnv(): Promise<void> {
  let cache = loadCache();
  if (shouldAutoSync(cache)) {
    const ok = await trySyncRemote();
    if (ok) {
      cache = loadCache();
    } else if (!cache) {
      console.error("No local cache and sync failed. Run: cfg sync");
      process.exit(1);
    }
  }
  for (const [key, entry] of Object.entries(cache!.secrets).sort(([a], [b]) =>
    a.localeCompare(b)
  )) {
    if (entry.env === false) continue;
    const escaped = entry.value.replace(/'/g, "'\\''");
    console.log(`export ${key}='${escaped}'`);
  }
}

export async function cmdGet(key: string, remote: boolean): Promise<void> {
  if (remote) {
    const { data } = await api("GET", `/config/${encodeURIComponent(key)}`);
    console.log(data.value);
    return;
  }
  let cache = loadCache();
  if (shouldAutoSync(cache)) {
    const ok = await trySyncRemote();
    if (ok) cache = loadCache();
    else if (!cache) {
      console.error("No local cache and sync failed. Run: cfg sync");
      process.exit(1);
    }
  }
  if (!cache) {
    console.error("No local cache. Run: cfg sync");
    process.exit(1);
  }
  const entry = cache.secrets[key];
  if (!entry) {
    console.error(`Error: ${key} not found in cache. Try: cfg sync`);
    process.exit(1);
  }
  console.log(entry.value);
}

export async function cmdSet(args: string[]): Promise<void> {
  const shared = args.includes("--shared");
  const noEnv = args.includes("--no-env");
  const isSecret = args.includes("--secret");
  const filtered = args.filter(
    (a) => !["--shared", "--no-env", "--secret"].includes(a)
  );
  if (filtered.length < 2) {
    console.error(
      "Usage: cfg set [--shared] [--no-env] [--secret] <KEY> <VALUE>"
    );
    process.exit(1);
  }
  const [key, ...rest] = filtered;
  const value = rest.join(" ");
  const scope = shared ? "shared" : "personal";
  const body = { value, env: !noEnv, secret: isSecret };
  await api("PUT", `/config/${encodeURIComponent(key)}?scope=${scope}`, body);
  const flags: string[] = [];
  if (noEnv) flags.push("no-env");
  if (isSecret) flags.push("secret");
  const flagStr = flags.length ? ` [${flags.join(", ")}]` : "";
  console.log(`✓ ${key} (${scope})${flagStr}`);
  const cache = loadCache();
  if (cache) {
    cache.secrets[key] = {
      value,
      scope,
      env: !noEnv,
      secret: isSecret,
      updated_at: new Date().toISOString(),
    };
    saveCache(cache);
  }
}

export async function cmdUnset(args: string[]): Promise<void> {
  const shared = args.includes("--shared");
  const filtered = args.filter((a) => a !== "--shared");
  if (filtered.length < 1) {
    console.error("Usage: cfg unset [--shared] <KEY>");
    process.exit(1);
  }
  const key = filtered[0];
  const scope = shared ? "shared" : "personal";
  await api("DELETE", `/config/${encodeURIComponent(key)}?scope=${scope}`);
  console.log(`✓ Deleted ${key} (${scope})`);
  const cache = loadCache();
  if (cache && cache.secrets[key]) {
    delete cache.secrets[key];
    saveCache(cache);
  }
}

export async function cmdList(): Promise<void> {
  let cache = loadCache();
  if (shouldAutoSync(cache)) {
    const ok = await trySyncRemote();
    if (ok) cache = loadCache();
    else if (!cache) {
      console.error("No local cache and sync failed. Run: cfg sync");
      process.exit(1);
    }
  }
  if (!cache) {
    console.error("No local cache. Run: cfg sync");
    process.exit(1);
  }
  if (!cache.secrets || Object.keys(cache.secrets).length === 0) {
    console.log("No keys found");
    return;
  }
  const keys = Object.keys(cache.secrets).sort();
  const maxLen = Math.max(...keys.map((k) => k.length));
  for (const key of keys) {
    const entry = cache.secrets[key];
    const scope =
      entry.scope === "personal"
        ? "\x1B[32mpersonal\x1B[0m"
        : "\x1B[34mshared\x1B[0m  ";
    const flags: string[] = [];
    if (entry.env === false) flags.push("\x1B[33mno-env\x1B[0m");
    if (entry.secret) flags.push("\x1B[31msecret\x1B[0m");
    const flagStr = flags.length ? "  " + flags.join(" ") : "";
    console.log(`  ${key.padEnd(maxLen + 2)}${scope}${flagStr}`);
  }
  console.log(`\nTotal: ${keys.length} keys (agent: ${cache.agent_id})`);
  console.log(`Last sync: ${cache.synced_at}`);
}

export function cmdToken(token: string): void {
  const cfg = loadConfig();
  cfg.token = token;
  saveConfig(cfg);
  console.log("✓ Token saved");
}

export async function cmdFlags(args: string[]): Promise<void> {
  const shared = args.includes("--shared");
  const filtered = args.filter((a) => !["--shared"].includes(a));
  if (filtered.length < 1) {
    console.error(
      "Usage: cfg flags [--shared] <KEY> [--env|--no-env] [--secret|--no-secret]"
    );
    process.exit(1);
  }
  const key = filtered[0];
  const flagArgs = filtered.slice(1);
  const body: Record<string, boolean> = {};
  if (flagArgs.includes("--env")) body.env = true;
  if (flagArgs.includes("--no-env")) body.env = false;
  if (flagArgs.includes("--secret")) body.secret = true;
  if (flagArgs.includes("--no-secret")) body.secret = false;
  if (Object.keys(body).length === 0) {
    // Just show current flags
    const { data } = await api("GET", `/config/${encodeURIComponent(key)}`);
    console.log(
      `${key}: env=${data.env ?? true}, secret=${data.secret ?? false} (${data.scope})`
    );
    return;
  }
  const scope = shared ? "shared" : "personal";
  const { data } = await api(
    "PATCH",
    `/config/${encodeURIComponent(key)}?scope=${scope}`,
    body
  );
  console.log(`✓ ${key} flags updated: env=${data.env}, secret=${data.secret}`);
  // Update cache
  const cache = loadCache();
  if (cache && cache.secrets[key]) {
    if (body.env !== undefined) cache.secrets[key].env = body.env;
    if (body.secret !== undefined) cache.secrets[key].secret = body.secret;
    saveCache(cache);
  }
}

export async function cmdAdminAddUser(args: string[]): Promise<void> {
  const role = args.includes("--admin") ? "admin" : "agent";
  const filtered = args.filter((a) => a !== "--admin");
  if (!filtered[0]) {
    console.error("Usage: cfg admin add <AGENT_ID> [--admin]");
    process.exit(1);
  }
  const { data } = await api("POST", "/admin/token", {
    agent_id: filtered[0],
    role,
  });
  console.log(`✓ Created ${data.role} token for ${data.agent_id}`);
  console.log(`  Token: ${data.token}`);
}

export async function cmdAdminRemoveUser(args: string[]): Promise<void> {
  if (!args[0]) {
    console.error("Usage: cfg admin remove <AGENT_ID>");
    process.exit(1);
  }
  const { data } = await api(
    "DELETE",
    `/admin/token/${encodeURIComponent(args[0])}`
  );
  console.log(`✓ Revoked ${data.tokens_revoked} token(s) for ${data.agent_id}`);
}

export async function cmdAdminListAgents(): Promise<void> {
  const { data } = await api("GET", "/admin/agents");
  if (!data.agents?.length) {
    console.log("No agents found");
    return;
  }
  console.log("Agents:");
  for (const agent of data.agents) {
    console.log(`  ${agent}`);
  }
}

export async function cmdAdminRefreshToken(args: string[]): Promise<void> {
  if (!args[0]) {
    console.error("Usage: cfg admin refresh <AGENT_ID>");
    process.exit(1);
  }
  const agentId = args[0];
  await api("DELETE", `/admin/token/${encodeURIComponent(agentId)}`);
  const { data } = await api("POST", "/admin/token", { agent_id: agentId });
  console.log(`✓ Refreshed token for ${data.agent_id}`);
  console.log(`  Token: ${data.token}`);
}

export async function cmdAdminInspect(args: string[]): Promise<void> {
  if (!args[0]) {
    console.error("Usage: cfg admin inspect <AGENT_ID>");
    process.exit(1);
  }
  const { data } = await api(
    "GET",
    `/admin/agent/${encodeURIComponent(args[0])}`
  );
  if (!data.secrets || Object.keys(data.secrets).length === 0) {
    console.log(`No keys for ${data.agent_id}`);
    return;
  }
  const keys = Object.keys(data.secrets).sort();
  const maxLen = Math.max(...keys.map((k) => k.length));
  for (const key of keys) {
    const entry = data.secrets[key];
    const scope =
      entry.scope === "personal"
        ? "\x1B[32mpersonal\x1B[0m"
        : "\x1B[34mshared\x1B[0m  ";
    console.log(`  ${key.padEnd(maxLen + 2)}${scope}`);
  }
  console.log(`\nTotal: ${keys.length} keys (agent: ${data.agent_id})`);
}

export function showHelp(): void {
  console.log(`cfg — config.shazhou.work CLI

Usage:
  cfg sync                         Fetch all config to local cache
  cfg env                          Output export statements (from cache, auto-syncs if stale)
  cfg get <KEY>                    Read a key (from cache)
  cfg get --remote <KEY>           Read a key (from server)
  cfg set <KEY> <VALUE>            Write to personal scope
  cfg set --shared <KEY> <VALUE>   Write to shared scope (admin only)
  cfg set --no-env <KEY> <VALUE>   Mark as non-env (won't export via cfg env)
  cfg set --secret <KEY> <VALUE>   Mark as secret (sensitive, UI masked)
  cfg flags <KEY>                  Show flags for a key
  cfg flags <KEY> --no-env         Set no-env flag
  cfg flags <KEY> --secret         Set secret flag
  cfg unset <KEY>                  Delete from personal scope
  cfg unset --shared <KEY>         Delete from shared scope (admin only)
  cfg list                         List all keys with scope (from cache)
  cfg token <TOKEN>                Save auth token

Admin:
  cfg admin agents                 List all agents
  cfg admin add <ID> [--admin]     Create agent token (default role: agent)
  cfg admin remove <ID>            Revoke all tokens for an agent
  cfg admin refresh <ID>           Revoke + recreate token
  cfg admin inspect <ID>           View an agent's resolved config

Auto-sync:
  cfg env auto-syncs when cache is stale (>1 day since last success,
  or last sync failed and >2 hours since last attempt).
  Failed syncs fall back to stale cache silently.

Environment:
  CFG_TOKEN       Auth token (overrides saved token)
  CFG_ENDPOINT    API endpoint (default: ${DEFAULT_ENDPOINT})

Shell setup:
  eval $(cfg env)                  Add to .profile / .bashrc / .zshrc`);
}