package main

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

	"inou/lib"
)

func handleContactSheet(w http.ResponseWriter, r *http.Request) {
	seriesHex := strings.TrimPrefix(r.URL.Path, "/contact-sheet.webp/")
	if seriesHex == "" || len(seriesHex) != 16 {
		http.Error(w, "Invalid series ID", http.StatusBadRequest)
		return
	}

	ctx := getAccessContextOrFail(w, r)
	if ctx == nil {
		return
	}

	q := r.URL.Query()
	var wc, ww float64
	if v := q.Get("wc"); v != "" {
		wc, _ = strconv.ParseFloat(v, 64)
	}
	if v := q.Get("ww"); v != "" {
		ww, _ = strconv.ParseFloat(v, 64)
	}

	body, err := lib.RenderContactSheet(ctx.AccessorID, seriesHex, wc, ww)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "image/webp")
	w.Header().Set("Cache-Control", "public, max-age=3600")
	w.Write(body)
}