package api

import (
	"net/http"

	"drmdecryption/app"
	"drmdecryption/mpd"
)

// appInfo describes one compiled-in app module to the dashboard, so the UI never
// has to hardcode a provider or channel name.
type appInfo struct {
	Name      string        `json:"name"`
	Channels  []channelInfo `json:"channels"`
	Rewriter  string        `json:"rewriter"`
	HasConfig bool          `json:"has_config"`
}

type channelInfo struct {
	ID    string `json:"id"`
	Label string `json:"label"`
}

// apps answers GET /api/apps: which providers this binary was built with.
func (h *Handler) apps(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodGet {
		writeErr(w, http.StatusMethodNotAllowed, "method not allowed")
		return
	}
	out := []appInfo{}
	for _, a := range app.All() {
		info := appInfo{Name: a.Name(), Channels: []channelInfo{}, Rewriter: "none"}
		for _, ch := range a.Channels() {
			info.Channels = append(info.Channels, channelInfo{ID: ch.ID, Label: ch.Label})
		}
		// A module with no local values file has no channels to offer yet.
		info.HasConfig = len(info.Channels) > 0
		if sd, ok := a.(app.StreamDefaults); ok {
			info.Rewriter = sd.RewriterName()
		}
		out = append(out, info)
	}
	writeJSON(w, http.StatusOK, map[string]any{
		"apps":      out,
		"rewriters": mpd.Names(),
	})
}