package cli

import (
	"context"
	"errors"
	"fmt"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"

	"github.com/spf13/cobra"

	"git.cloudinit.dev/coreci/orca/internal/daemon"
)

var (
	daemonAddr string
)

var daemonCmd = &cobra.Command{
	Use:   "daemon",
	Short: "Run the orca daemon (HTTP API + health checks)",
	Long:  "Start the orca daemon. Listens on the configured address for health and API requests.",
	RunE: func(cmd *cobra.Command, args []string) error {
		db, closer, err := openDB()
		if err != nil {
			return err
		}
		defer closer()

		srv := daemon.NewServer(daemon.Options{
			DB:    db,
			Log:   newLogger(),
			Addr:  daemonAddr,
			Actor: "daemon",
		})
		srv.MarkReady()

		errCh := make(chan error, 1)
		go func() {
			err := srv.Start()
			if err != nil && !errors.Is(err, http.ErrServerClosed) {
				errCh <- err
			}
		}()

		fmt.Fprintf(cmd.OutOrStdout(), "✓ orca daemon listening on %s\n", daemonAddr)
		fmt.Fprintln(cmd.OutOrStdout(), "  /healthz    - liveness")
		fmt.Fprintln(cmd.OutOrStdout(), "  /readyz     - readiness (db + ready flag)")
		fmt.Fprintln(cmd.OutOrStdout(), "  /v1/status  - status JSON")
		fmt.Fprintln(cmd.OutOrStdout(), "  /v1/jobs    - list jobs")
		fmt.Fprintln(cmd.OutOrStdout(), "  /v1/nodes   - list nodes")
		fmt.Fprintln(cmd.OutOrStdout(), "  /v1/tasks   - list tasks")
		fmt.Fprintln(cmd.OutOrStdout(), "  press Ctrl+C to stop")

		ctx, stop := signal.NotifyContext(cmd.Context(), os.Interrupt, syscall.SIGTERM)
		defer stop()

		select {
		case <-ctx.Done():
			fmt.Fprintln(cmd.OutOrStdout(), "\nshutting down...")
			shutdownCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
			defer cancel()
			return srv.Shutdown(shutdownCtx)
		case err := <-errCh:
			return err
		}
	},
}

func init() {
	daemonCmd.Flags().StringVar(&daemonAddr, "addr", ":8080", "listen address")
	rootCmd.AddCommand(daemonCmd)
}