package view

import (
	"encoding/json"
	"fmt"
	"local/dndex/config"
	"local/dndex/storage"
	"local/dndex/storage/entity"
	"log"
	"net/http"
	"path"
	"strings"
)

func Html(g storage.Graph) error {
	port := config.New().Port
	log.Println("listening on", port)
	err := http.ListenAndServe(fmt.Sprintf(":%d", port), foo(g))
	return err
}

func foo(g storage.Graph) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Access-Control-Allow-Origin", "*")
		var err error
		switch path.Base(r.URL.Path) {
		case "who":
			err = who(g, w, r)
		default:
			http.NotFound(w, r)
			return
		}
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
		}
	})
}

func who(g storage.Graph, w http.ResponseWriter, r *http.Request) error {
	namespace := path.Dir(r.URL.Path)
	if len(namespace) < 2 {
		http.NotFound(w, r)
		return nil
	}
	namespace = strings.Replace(namespace[1:], "/", ".", -1)
	ids := r.URL.Query()["id"]
	_, verbose := r.URL.Query()["v"]
	results := make(map[string]entity.One)
	for i := 0; i < len(ids); i++ {
		id := ids[i]
		ones, err := g.List(r.Context(), namespace, id)
		if err != nil {
			return err
		}
		if len(ones) != 1 {
			ones = append(ones, entity.One{})
		}
		one := ones[0]
		if verbose {
			ones, err := g.List(r.Context(), namespace, one.Peers()...)
			if err != nil {
				return err
			}
			for _, another := range ones {
				another.Connections = nil
				for j := range one.Connections {
					if one.Connections[j].Name == another.Name {
						one.Connections[j] = entity.One{
							Relationship: one.Connections[j].Relationship,
							Type:         another.Type,
							Modified:     another.Modified,
						}
					}
				}
			}
		}
		results[id] = one
	}
	log.Println("results:", results)
	enc := json.NewEncoder(w)
	enc.SetIndent("", "   ")
	return enc.Encode(results)
}