package docker

import (
	"context"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
)

func TestListParsesContainers(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/containers/json" {
			http.NotFound(w, r)
			return
		}
		w.Write([]byte(`[
		 {"Id":"abcdef1234567890","Names":["/minecraft"],"Image":"itzg/minecraft-server","State":"running",
		  "Ports":[{"PrivatePort":25565,"PublicPort":25565,"Type":"tcp"},{"PrivatePort":25565,"PublicPort":25565,"Type":"tcp"},{"PrivatePort":8123,"Type":"tcp"}],
		  "NetworkSettings":{"Networks":{"bridge":{"IPAddress":"172.17.0.2"},"none":{"IPAddress":""}}}},
		 {"Id":"1111","Names":["/db"],"Image":"postgres","State":"running","Ports":[],"NetworkSettings":{"Networks":{}}}
		]`))
	}))
	defer srv.Close()
	t.Setenv("DOCKER_HOST", "tcp://"+strings.TrimPrefix(srv.URL, "http://"))

	got, err := List(context.Background())
	if err != nil {
		t.Fatal(err)
	}
	if len(got) != 2 || got[0].Name != "db" || got[1].Name != "minecraft" {
		t.Fatalf("unexpected list: %+v", got)
	}
	mc := got[1]
	if mc.ID != "abcdef123456" || len(mc.Ports) != 2 || mc.Ports[0].Public != 25565 || mc.Ports[1].Public != 0 {
		t.Errorf("ports/id wrong: %+v", mc)
	}
	if mc.Networks["bridge"] != "172.17.0.2" || len(mc.Networks) != 1 {
		t.Errorf("networks wrong: %+v", mc.Networks)
	}
}

func TestListUnreachable(t *testing.T) {
	t.Setenv("DOCKER_HOST", "tcp://127.0.0.1:1")
	if _, err := List(context.Background()); err == nil {
		t.Fatal("expected an error when docker is not running")
	}
}