import { Effect } from "effect"
import { Server } from "../../server/server"
import { ServerDiscovery } from "@/server/discovery"
import { effectCmd } from "../effect-cmd"
import { withNetworkOptions, resolveNetworkOptions } from "../network"
import { Flag } from "@opencode-ai/core/flag/flag"

export const ServeCommand = effectCmd({
  command: "serve",
  builder: (yargs) =>
    withNetworkOptions(yargs).option("discoverable", {
      type: "boolean",
      describe: "write this server to the local discovery file for default TUI startup",
      default: false,
    }),
  describe: "starts a headless opencode server",
  // Server loads instances per-request via x-opencode-directory header — no
  // need for an ambient project InstanceContext at startup.
  instance: false,
  handler: Effect.fn("Cli.serve")(function* (args) {
    if (!Flag.OPENCODE_SERVER_PASSWORD) {
      console.log("Warning: OPENCODE_SERVER_PASSWORD is not set; server is unsecured.")
    }
    const opts = yield* resolveNetworkOptions(args)
    const server = yield* Effect.promise(() => Server.listen(opts))
    if (args.discoverable) {
      yield* ServerDiscovery.Service.use((discovery) => discovery.write(server.url))
      process.on("exit", ServerDiscovery.removeSync)
    }
    console.log(`opencode server listening on http://${server.hostname}:${server.port}`)

    yield* Effect.never.pipe(
      Effect.ensuring(
        args.discoverable
          ? ServerDiscovery.Service.use((discovery) => discovery.remove()).pipe(
              Effect.ensuring(Effect.sync(() => process.off("exit", ServerDiscovery.removeSync))),
            )
          : Effect.void,
      ),
    )
  }),
})