import "dotenv/config";
import { config } from "../src/config.js";

type ActorRecord = {
  actor_id: string;
  name: string;
  key?: string | null;
  namespace_id?: string;
  runner_name_selector?: string;
  crash_policy?: string;
  create_ts?: number;
  start_ts?: number | null;
  connectable_ts?: number | null;
  sleep_ts?: number | null;
  destroy_ts?: number | null;
  error?: unknown;
};

type ListActorsResponse = {
  actors?: ActorRecord[];
  pagination?: { cursor?: string | null };
};

type Options = {
  command: "list" | "flush";
  endpoint: string;
  namespace: string;
  name?: string;
  key?: string;
  crashedOnly: boolean;
  dryRun: boolean;
};

function parseArgs(): Options {
  const args = process.argv.slice(2);
  const command = args[0] === "flush" ? "flush" : "list";
  const options: Options = {
    command,
    endpoint: process.env.RIVET_ENDPOINT ?? config.rivetEndpoint,
    namespace: process.env.RIVET_NAMESPACE ?? "default",
    crashedOnly: false,
    dryRun: false,
  };

  for (let i = command === "flush" || args[0] === "list" ? 1 : 0; i < args.length; i += 1) {
    const arg = args[i];
    if (arg === "--") continue;
    else if (arg === "--endpoint") options.endpoint = requireValue(args, ++i, arg);
    else if (arg === "--namespace") options.namespace = requireValue(args, ++i, arg);
    else if (arg === "--name") options.name = requireValue(args, ++i, arg);
    else if (arg === "--key") options.key = requireValue(args, ++i, arg);
    else if (arg === "--crashed-only") options.crashedOnly = true;
    else if (arg === "--dry-run") options.dryRun = true;
    else if (arg === "--help" || arg === "-h") printHelpAndExit();
    else throw new Error(`Unknown argument: ${arg}`);
  }

  return options;
}

function requireValue(args: string[], index: number, flag: string) {
  const value = args[index];
  if (!value || value.startsWith("--")) throw new Error(`Missing value for ${flag}`);
  return value;
}

function printHelpAndExit(): never {
  console.log(`Usage:
  pnpm rivet:actors:list [--name growActor] [--key user_123] [--crashed-only]
  pnpm rivet:actors:flush -- --name growActor [--key user_123] [--crashed-only] [--dry-run]

Environment:
  RIVET_ENDPOINT     Defaults to config.rivetEndpoint (${config.rivetEndpoint})
  RIVET_NAMESPACE    Defaults to default

Examples:
  pnpm rivet:actors:list
  pnpm rivet:actors:flush:crashed
  pnpm rivet:actors:flush:grow
  pnpm rivet:actors:flush -- --name growActor --key user_123
`);
  process.exit(0);
}

function buildEndpoint(rawEndpoint: string) {
  const url = new URL(rawEndpoint);
  const token = url.password || process.env.RIVET_TOKEN || process.env.RIVET_ADMIN_TOKEN || "dev-admin-token";
  url.username = "";
  url.password = "";
  return {
    baseUrl: url.toString().replace(/\/$/, ""),
    headers: token ? { Authorization: `Bearer ${token}`, "x-rivet-token": token } : {},
  };
}

function actorHasError(actor: ActorRecord) {
  return Boolean(actor.error);
}

async function listActors(options: Options) {
  const { baseUrl, headers } = buildEndpoint(options.endpoint);
  const actors: ActorRecord[] = [];
  let cursor: string | null | undefined;

  do {
    const url = new URL(`${baseUrl}/actors`);
    url.searchParams.set("namespace", options.namespace);
    if (options.name) url.searchParams.set("name", options.name);
    if (options.key) url.searchParams.set("key", options.key);
    if (cursor) url.searchParams.set("cursor", cursor);

    const response = await fetch(url, { headers });
    if (!response.ok) {
      throw new Error(`Failed to list actors: ${response.status} ${response.statusText}\n${await response.text()}`);
    }

    const body = (await response.json()) as ListActorsResponse;
    actors.push(...(body.actors ?? []));
    cursor = body.pagination?.cursor;
  } while (cursor);

  return options.crashedOnly ? actors.filter(actorHasError) : actors;
}

async function deleteActor(options: Options, actor: ActorRecord) {
  const { baseUrl, headers } = buildEndpoint(options.endpoint);
  const url = new URL(`${baseUrl}/actors/${encodeURIComponent(actor.actor_id)}`);
  url.searchParams.set("namespace", options.namespace);

  if (options.dryRun) return;

  const response = await fetch(url, { method: "DELETE", headers });
  if (!response.ok) {
    throw new Error(`Failed to delete ${actor.actor_id}: ${response.status} ${response.statusText}\n${await response.text()}`);
  }
}

function printActors(actors: ActorRecord[]) {
  if (!actors.length) {
    console.log("No actors matched.");
    return;
  }

  for (const actor of actors) {
    console.log(
      [
        actor.actor_id,
        actor.name,
        `key=${actor.key ?? ""}`,
        actor.error ? `error=${JSON.stringify(actor.error)}` : "ok",
      ].join("\t"),
    );
  }
}

async function main() {
  const options = parseArgs();
  const actors = await listActors(options);

  if (options.command === "list") {
    printActors(actors);
    return;
  }

  if (!options.name && !options.crashedOnly && !options.key) {
    throw new Error("Refusing to flush every actor without a filter. Pass --name, --key, or --crashed-only.");
  }

  printActors(actors);
  for (const actor of actors) {
    await deleteActor(options, actor);
    console.log(`${options.dryRun ? "Would delete" : "Deleted"} ${actor.name} ${actor.actor_id} key=${actor.key ?? ""}`);
  }
}

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