package main

import (
	"net/http"
	"strconv"
	"strings"
)

func serveFlashcardDetail(w http.ResponseWriter, r *http.Request, store *sqliteStore) {
	segments := strings.Split(strings.TrimPrefix(r.URL.Path, "/api/v1/flashcards/"), "/")
	if len(segments) == 0 || segments[0] == "" {
		writeJSON(w, http.StatusNotFound, map[string]string{"error": "not found"})
		return
	}

	publicID, err := strconv.ParseInt(segments[0], 10, 64)
	if err != nil {
		writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid id"})
		return
	}

	if len(segments) >= 2 && segments[1] != "" {
		version, err := strconv.Atoi(segments[1])
		if err != nil {
			writeJSON(w, http.StatusBadRequest, map[string]string{"error": "invalid version"})
			return
		}
		e, err := store.getByPublicIDAndVersion(r.Context(), publicID, version)
		if err != nil {
			writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "internal error"})
			return
		}
		if e == nil {
			writeJSON(w, http.StatusNotFound, map[string]string{"error": "not found"})
			return
		}
		writeJSON(w, http.StatusOK, e)
		return
	}

	e, err := store.getLatestByPublicID(r.Context(), publicID)
	if err != nil {
		writeJSON(w, http.StatusInternalServerError, map[string]string{"error": "internal error"})
		return
	}
	if e == nil {
		writeJSON(w, http.StatusNotFound, map[string]string{"error": "not found"})
		return
	}
	writeJSON(w, http.StatusOK, e)
}