package app

import (
	md "farga/app/middleware"
	"farga/db/types"
	"farga/lib/git"
	"fmt"
	"net/http"

	"github.com/gorilla/mux"
)

func (a *App) RepoZipDownload(w http.ResponseWriter, r *http.Request) {
	vars := mux.Vars(r)
	branch := vars["branch"]

	dbRepo, ok := r.Context().Value(md.RepoKey).(types.Repo)
	if !ok {
		http.Error(w, "Internal Server Error: Middleware did not provide repo data.", http.StatusInternalServerError)
		return
	}

	gitRepo, err := git.Repo(*dbRepo.UserID, dbRepo.ID, branch)
	if err != nil {
		http.Error(w, "Such a repo wasn't found.", http.StatusInternalServerError)
		return
	}

	repoPath := git.RepoPath(*dbRepo.UserID, dbRepo.ID)

	// don't waste resources if the reference is invalid.
	ref, err := git.ResolveHead(gitRepo.Git, branch)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s-%s.zip\"", dbRepo.Name, ref.Name().Short())) // name the file

	err = git.ZipStream(r.Context(), repoPath, ref.Hash().String(), w)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
}