import { readConfig } from "./src/config";
import { debugDispatch, debugHealth } from "./src/debug";
import { stackLogs, stackStatus, startStack, stopStack } from "./src/docker";
import { runE2E } from "./src/e2e";
import { emitError, emitJson } from "./src/output";
import { jobWithTail, listJobs, readJob, runJob } from "./src/jobs";
import { runChecks } from "./src/check";

const args = process.argv.slice(2);
const commandName = args.join(" ") || "help";

function help(): unknown {
  return {
    entry: "bun scripts/cli.ts",
    output: "json",
    commands: [
      { command: "help", description: "List supported commands." },
      { command: "config show", description: "Validate and print config.json as the single source of truth." },
      { command: "check", description: "Run config, TypeScript, file presence, and docker-compose config checks." },
      { command: "server start", description: "Fire-and-forget build/start for database, backend-core, frontend, and provider gateway." },
      { command: "server stop", description: "Fire-and-forget docker-compose down for the fixed UniDesk stack." },
      { command: "server status", description: "Show fixed ports, containers, service health, and public URLs." },
      { command: "server logs [--tail-bytes N]", description: "Return bounded tails from file logs and docker logs." },
      { command: "job list", description: "List async jobs from .state/jobs." },
      { command: "job status <jobId|latest> [--tail-bytes N]", description: "Show job state with bounded stdout/stderr tails." },
      { command: "debug health", description: "Probe internal core, overview, nodes, frontend, provider ingress, and public boundary." },
      { command: "debug dispatch [providerId] [docker.ps|echo]", description: "Submit a real internal-core dispatch request for CLI debugging." },
      { command: "e2e run", description: "Run public frontend/provider, internal core/database, and Playwright login E2E checks." },
    ],
  };
}

function numberOption(name: string, defaultValue: number): number {
  const index = args.indexOf(name);
  if (index === -1) return defaultValue;
  const raw = args[index + 1];
  const value = Number(raw);
  if (!Number.isInteger(value) || value <= 0) throw new Error(`${name} must be a positive integer`);
  return value;
}

function latestJobId(): string {
  const jobs = listJobs();
  if (jobs.length === 0) throw new Error("No jobs found");
  return jobs[0].id;
}

async function main(): Promise<void> {
  const [top, sub, third, fourth] = args;
  if (top === undefined || top === "help" || top === "--help" || top === "-h") {
    emitJson(commandName, help());
    return;
  }

  if (top === "internal" && sub === "run-job") {
    if (!third) throw new Error("internal run-job requires job id");
    emitJson(commandName, await runJob(third));
    return;
  }

  const config = readConfig();

  if (top === "config" && sub === "show") {
    emitJson(commandName, { config });
    return;
  }

  if (top === "check") {
    const result = runChecks(config);
    emitJson(commandName, result, result.ok);
    if (!result.ok) process.exitCode = 1;
    return;
  }

  if (top === "server") {
    if (sub === "start") {
      emitJson(commandName, startStack(config));
      return;
    }
    if (sub === "stop") {
      emitJson(commandName, stopStack(config));
      return;
    }
    if (sub === "status") {
      emitJson(commandName, await stackStatus(config));
      return;
    }
    if (sub === "logs") {
      emitJson(commandName, stackLogs(config, numberOption("--tail-bytes", 3000)));
      return;
    }
  }

  if (top === "job") {
    if (sub === "list") {
      emitJson(commandName, { jobs: listJobs() });
      return;
    }
    if (sub === "status") {
      const id = third === "latest" || third === undefined ? latestJobId() : third;
      emitJson(commandName, { job: jobWithTail(readJob(id), numberOption("--tail-bytes", 12000)) });
      return;
    }
  }

  if (top === "debug") {
    if (sub === "health") {
      emitJson(commandName, await debugHealth(config));
      return;
    }
    if (sub === "dispatch") {
      const providerId = third ?? config.providerGateway.id;
      const dispatchCommand = fourth === "docker.ps" || fourth === "echo" ? fourth : "docker.ps";
      emitJson(commandName, await debugDispatch(config, providerId, dispatchCommand));
      return;
    }
  }

  if (top === "e2e" && sub === "run") {
    const result = await runE2E(config);
    const ok = (result as { ok?: unknown }).ok === true;
    emitJson(commandName, result, ok);
    if (!ok) process.exitCode = 1;
    return;
  }

  throw new Error(`Unknown command: ${commandName}`);
}

main().catch((error) => {
  emitError(commandName, error);
  process.exitCode = 1;
});