package httpapi

import (
	"fmt"
	"net/http"
	"strconv"

	"github.com/descrybe/descrybe-v2/apps/api/internal/feeds"
	"github.com/go-chi/chi/v5"
	"github.com/google/uuid"
)

func (s *Server) handleExportSelectedProducts(w http.ResponseWriter, r *http.Request) {
	cid, _ := CompanyIDFromContext(r.Context())
	feedID, err := uuid.Parse(chi.URLParam(r, "id"))
	if err != nil {
		Error(w, http.StatusBadRequest, "invalid id")
		return
	}
	var body struct {
		ProductIDs []string `json:"product_ids"`
	}
	if err := DecodeJSON(r, &body); err != nil {
		Error(w, http.StatusBadRequest, "invalid json")
		return
	}
	ids := make([]uuid.UUID, 0, len(body.ProductIDs))
	for _, raw := range body.ProductIDs {
		id, err := uuid.Parse(raw)
		if err != nil {
			Error(w, http.StatusBadRequest, "invalid product_ids")
			return
		}
		ids = append(ids, id)
	}
	filename, mimeType, content, count, err := s.Feeds.ExportSelectedProducts(r.Context(), cid, feedID, ids)
	if err != nil {
		ClientOrLog(w, http.StatusBadRequest, "could not export selected products", err, feeds.ClientError)
		return
	}
	w.Header().Set("Content-Type", mimeType)
	w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=%q", filename))
	w.Header().Set("X-Products-Exported", strconv.Itoa(count))
	w.Header().Set("Cache-Control", "no-store")
	w.WriteHeader(http.StatusOK)
	_, _ = w.Write(content)
}