import { readFile } from "node:fs/promises";
import { startManagerServer } from "../../src/mgr/server.js";
import { MemoryAgentRunStore } from "../../src/mgr/store.js";
import { ManagerClient } from "../../src/mgr/client.js";
import { runOnce } from "../../src/runner/run-once.js";
import { renderRunnerJobDryRun } from "../../src/runner/k8s-job.js";
import { renderCodexProviderSecretPlan } from "./secret-render.js";
import type { JsonRecord, JsonValue, RunRecord } from "../../src/common/types.js";
import { AgentRunError, errorToJson } from "../../src/common/errors.js";
import type { RunnerOnceOptions } from "../../src/runner/run-once.js";

interface ParsedArgs {
  positional: string[];
  flags: Map<string, string | boolean>;
}

export async function runCli(argv: string[]): Promise<void> {
  try {
    const result = await dispatch(parseArgs(argv));
    print({ ok: true, data: result });
  } catch (error) {
    const status = error instanceof AgentRunError ? error.httpStatus : 1;
    print({ ok: false, ...(error instanceof AgentRunError ? { failureKind: error.failureKind, message: error.message } : { failureKind: "infra-failed", message: error instanceof Error ? error.message : String(error) }), error: errorToJson(error) });
    process.exitCode = status === 0 ? 1 : status > 255 ? 1 : status;
  }
}

async function dispatch(args: ParsedArgs): Promise<JsonValue> {
  const [group, command, id] = args.positional;
  if (!group || group === "help") return help();
  if (group === "server" && command === "start") return startServer(args);
  if (group === "server" && command === "status") return client(args).get("/health/readiness");
  if (group === "backends" && command === "list") return client(args).get("/api/v1/backends");
  if (group === "secrets" && command === "codex" && id === "render") return renderCodexSecret(args);
  if (group === "runs" && command === "create") return client(args).post("/api/v1/runs", await jsonFile(args));
  if (group === "runs" && command === "show" && id) return client(args).get(`/api/v1/runs/${encodeURIComponent(id)}`);
  if (group === "runs" && command === "events" && id) return client(args).get(`/api/v1/runs/${encodeURIComponent(id)}/events?afterSeq=${flag(args, "after-seq", "0")}&limit=${flag(args, "limit", "100")}`);
  if (group === "commands" && command === "create" && id) {
    const body = await jsonFile(args);
    if (!body.type) body.type = flag(args, "type", "turn");
    const idempotencyKey = optionalFlag(args, "idempotency-key");
    if (idempotencyKey) body.idempotencyKey = idempotencyKey;
    return client(args).post(`/api/v1/runs/${encodeURIComponent(id)}/commands`, body);
  }
  if (group === "commands" && command === "show" && id) {
    const runId = flag(args, "run-id", "");
    if (!runId) throw new AgentRunError("schema-invalid", "commands show requires --run-id", { httpStatus: 2 });
    return client(args).get(`/api/v1/runs/${encodeURIComponent(runId)}/commands/${encodeURIComponent(id)}`);
  }
  if (group === "runner" && command === "start") {
    const runId = flag(args, "run-id", "");
    if (!runId) throw new AgentRunError("schema-invalid", "runner start requires --run-id", { httpStatus: 2 });
    const options: RunnerOnceOptions = {
      managerUrl: managerUrl(args),
      runId,
    };
    const runnerId = optionalFlag(args, "runner-id");
    const codexCommand = optionalFlag(args, "codex-command");
    const codexHome = optionalFlag(args, "codex-home") ?? process.env.CODEX_HOME;
    if (runnerId) options.runnerId = runnerId;
    if (codexCommand) options.codexCommand = codexCommand;
    if (codexHome) options.codexHome = codexHome;
    return runOnce(options) as unknown as JsonValue;
  }
  if (group === "runner" && command === "job") return renderRunnerJob(args);
  throw new AgentRunError("schema-invalid", `unsupported command: ${args.positional.join(" ")}`, { httpStatus: 2 });
}

async function renderRunnerJob(args: ParsedArgs): Promise<JsonRecord> {
  const runId = flag(args, "run-id", "");
  const commandId = flag(args, "command-id", "");
  if (!runId) throw new AgentRunError("schema-invalid", "runner job requires --run-id", { httpStatus: 2 });
  if (!commandId) throw new AgentRunError("schema-invalid", "runner job requires --command-id", { httpStatus: 2 });
  const image = optionalFlag(args, "image");
  if (args.flags.get("dry-run") !== true) {
    const body: JsonRecord = { commandId };
    if (image) body.image = image;
    const namespace = optionalFlag(args, "namespace");
    const attemptId = optionalFlag(args, "attempt-id");
    const runnerId = optionalFlag(args, "runner-id");
    const sourceCommit = optionalFlag(args, "source-commit");
    const runnerManagerUrl = optionalFlag(args, "runner-manager-url");
    if (namespace) body.namespace = namespace;
    if (attemptId) body.attemptId = attemptId;
    if (runnerId) body.runnerId = runnerId;
    if (sourceCommit) body.sourceCommit = sourceCommit;
    if (runnerManagerUrl) body.managerUrl = runnerManagerUrl;
    return await client(args).post(`/api/v1/runs/${encodeURIComponent(runId)}/runner-jobs`, body) as JsonRecord;
  }
  if (!image) throw new AgentRunError("schema-invalid", "runner job --dry-run requires --image", { httpStatus: 2 });
  const run = await client(args).get(`/api/v1/runs/${encodeURIComponent(runId)}`) as RunRecord;
  const options = {
    run,
    commandId,
    image,
    managerUrl: managerUrl(args),
    namespace: optionalFlag(args, "namespace") ?? "agentrun-v01",
  };
  const attemptId = optionalFlag(args, "attempt-id");
  const runnerId = optionalFlag(args, "runner-id");
  const sourceCommit = optionalFlag(args, "source-commit");
  return renderRunnerJobDryRun({
    ...options,
    ...(attemptId ? { attemptId } : {}),
    ...(runnerId ? { runnerId } : {}),
    ...(sourceCommit ? { sourceCommit } : {}),
  });
}

async function renderCodexSecret(args: ParsedArgs): Promise<JsonRecord> {
  if (args.flags.get("dry-run") !== true) {
    throw new AgentRunError("schema-invalid", "secrets codex render requires --dry-run", { httpStatus: 2 });
  }
  const options: Parameters<typeof renderCodexProviderSecretPlan>[0] = { dryRun: true };
  const codexHome = optionalFlag(args, "codex-home");
  const authFile = optionalFlag(args, "auth-file");
  const configFile = optionalFlag(args, "config-file");
  const namespace = optionalFlag(args, "namespace");
  const secretName = optionalFlag(args, "secret-name");
  if (codexHome) options.codexHome = codexHome;
  if (authFile) options.authFile = authFile;
  if (configFile) options.configFile = configFile;
  if (namespace) options.namespace = namespace;
  if (secretName) options.secretName = secretName;
  return renderCodexProviderSecretPlan(options);
}

async function startServer(args: ParsedArgs): Promise<JsonRecord> {
  const port = Number(flag(args, "port", "8080"));
  const host = flag(args, "host", "0.0.0.0");
  const storeMode = optionalFlag(args, "store") ?? process.env.AGENTRUN_STORE ?? process.env.AGENTRUN_MGR_STORE;
  const started = await startManagerServer({ port, host, ...(storeMode === "memory" ? { store: new MemoryAgentRunStore() } : {}) });
  const database = await started.store.health();
  return { serviceId: "agentrun-mgr", baseUrl: started.baseUrl, pid: process.pid, database, note: "foreground process; use Kubernetes/Tekton for v0.1 runtime" };
}

function client(args: ParsedArgs): ManagerClient {
  return new ManagerClient(managerUrl(args));
}

function managerUrl(args: ParsedArgs): string {
  return optionalFlag(args, "manager-url") ?? process.env.AGENTRUN_MGR_URL ?? "http://127.0.0.1:8080";
}

async function jsonFile(args: ParsedArgs): Promise<JsonRecord> {
  const file = optionalFlag(args, "json-file");
  if (!file) throw new AgentRunError("schema-invalid", "--json-file is required", { httpStatus: 2 });
  const value = JSON.parse(await readFile(file, "utf8")) as unknown;
  if (typeof value === "object" && value !== null && !Array.isArray(value)) return value as JsonRecord;
  throw new AgentRunError("schema-invalid", "json file must contain an object", { httpStatus: 2 });
}

function parseArgs(argv: string[]): ParsedArgs {
  const positional: string[] = [];
  const flags = new Map<string, string | boolean>();
  for (let index = 0; index < argv.length; index += 1) {
    const item = argv[index] ?? "";
    if (!item.startsWith("--")) {
      positional.push(item);
      continue;
    }
    const key = item.slice(2);
    const next = argv[index + 1];
    if (next === undefined || next.startsWith("--")) flags.set(key, true);
    else {
      flags.set(key, next);
      index += 1;
    }
  }
  return { positional, flags };
}

function flag(args: ParsedArgs, name: string, fallback: string): string {
  const value = args.flags.get(name);
  return typeof value === "string" ? value : fallback;
}

function optionalFlag(args: ParsedArgs, name: string): string | null {
  const value = args.flags.get(name);
  return typeof value === "string" && value.length > 0 ? value : null;
}

function help(): JsonRecord {
  return {
    commands: [
      "runs create --json-file <run.json>",
      "runs show <runId>",
      "runs events <runId> --after-seq <n> --limit <n>",
      "commands create <runId> --type turn --json-file <payload.json>",
      "commands show <commandId> --run-id <runId>",
      "runner start --run-id <runId>",
      "runner job --run-id <runId> --command-id <commandId> [--image <image>] [--runner-manager-url <url>]",
      "runner job --dry-run --run-id <runId> --command-id <commandId> --image <image>",
      "secrets codex render --dry-run [--codex-home <dir>] [--namespace agentrun-v01] [--secret-name agentrun-v01-provider-codex]",
      "backends list",
      "server start|status",
    ],
  };
}

function print(value: JsonRecord): void {
  process.stdout.write(`${JSON.stringify(value)}\n`);
}