package api

import (
	"encoding/json"
	"fmt"
	"net/http"

	"github.com/will/k8s-agent-dashboard/internal/claude"
)

func GetClaudeStream(hub *claude.EventHub) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "text/event-stream")
		w.Header().Set("Cache-Control", "no-cache")
		w.Header().Set("Connection", "keep-alive")
		w.Header().Set("Access-Control-Allow-Origin", "*")

		flusher, ok := w.(http.Flusher)
		if !ok {
			http.Error(w, "Streaming unsupported", http.StatusInternalServerError)
			return
		}

		ch, cancel := hub.Subscribe()
		defer cancel()

		notify := r.Context().Done()

		for {
			select {
			case ev, ok := <-ch:
				if !ok {
					return
				}

				data, err := json.Marshal(ev)
				if err != nil {
					continue
				}

				fmt.Fprintf(w, "event: %s\n", ev.Type)
				fmt.Fprintf(w, "id: %d\n", ev.ID)
				fmt.Fprintf(w, "data: %s\n\n", data)
				flusher.Flush()

			case <-notify:
				return
			}
		}
	}
}