package api

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

	"palette/internal/lang"
)

// handleGuessLang serves POST /api/guess-language.
func (a *apiServer) handleGuessLang(w http.ResponseWriter, r *http.Request) {
	setRateLimitHeaders(w, 1, 5)
	if !rateLimitGuess(r) {
		writeRateLimited(w, 1)
		return
	}
	var req struct {
		Content string `json:"content"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		writeErr(w, http.StatusBadRequest, "invalid json body")
		return
	}
	l := lang.GuessLang(req.Content)
	writeJSON(w, http.StatusOK, map[string]any{"language": l})
}