package ps

import (
	"fmt"
	"io"
	"log"
	"net/http"
	"net/http/httptest"
	"reflect"
	"sync"
	"testing"

	drycc "github.com/drycc/controller-sdk-go"
	"github.com/drycc/controller-sdk-go/api"
	"golang.org/x/net/websocket"
)

const processesFixture string = `
{
    "count": 1,
    "next": null,
    "previous": null,
    "results": [
        {
            "release": "v2",
            "type": "web",
            "name": "example-go-v2-web-45678",
            "state": "up",
            "started": "2016-02-13T00:47:52"
        }
    ]
}`

const podStateFixture string = `
{
	"count": 1,
	"next": null,
	"previous": null,
	"results": [{
		"container": "web",
		"image": "registry.drycc.cc/base/base",
		"command": ["bash", "-c"],
		"args": ["sleep 3600s"],
		"state": {
			"running": {
			  "startedAt": "2024-05-21T02:27:03+00:00"
			},
			"waiting": {
			  "message": "container create failed: executable file './start.sh' not found in $PATH: No such file or directory\n",
			  "reason": "CreateContainerError"
			}
		},
		"lastState": {
			"terminated": {
			  "containerID": "cri-o://ccfc73b0b4d966af4f93ca871a04fa97460620cd8005c1c36f7734a08ba49ed0",
			  "exitCode": 1,
			  "finishedAt": "2024-05-21T02:27:03+00:00",
			  "reason": "Error",
			  "startedAt": "2024-05-21T02:26:33+00:00"
			}
		},
		"ready": true,
		"restartCount": 1
	}]
}`

const podDeleteExpected string = `{"pod_ids":"test-pod-web"}`

type fakeHTTPServer struct{}

func (fakeHTTPServer) ServeHTTP(res http.ResponseWriter, req *http.Request) {
	res.Header().Add("DRYCC_API_VERSION", drycc.APIVersion)

	if req.URL.Path == "/v2/apps/example-go/pods/" && req.Method == "GET" {
		res.Write([]byte(processesFixture))
		return
	}

	if req.URL.Path == "/v2/apps/example-go/pods/test-pod-web/describe/" && req.Method == "GET" {
		res.Write([]byte(podStateFixture))
		return
	}
	if req.URL.Path == "/v2/apps/example-go/pods/" && req.Method == "DELETE" {
		body, err := io.ReadAll(req.Body)

		if err != nil {
			fmt.Println(err)
			res.WriteHeader(http.StatusInternalServerError)
			res.Write(nil)
		}
		if string(body) != podDeleteExpected {
			fmt.Printf("Expected '%s', Got '%s'\n", podDeleteExpected, body)
			res.WriteHeader(http.StatusInternalServerError)
			res.Write(nil)
			return
		}
		res.WriteHeader(http.StatusNoContent)
		return
	}

	fmt.Printf("Unrecognized URL %s\n", req.URL)
	res.WriteHeader(http.StatusNotFound)
	res.Write(nil)
}

func TestProcessesList(t *testing.T) {
	t.Parallel()

	started := "2016-02-13T00:47:52"
	expected := api.PodsList{
		{
			Release: "v2",
			Type:    "web",
			Name:    "example-go-v2-web-45678",
			State:   "up",
			Started: started,
		},
	}

	handler := fakeHTTPServer{}
	server := httptest.NewServer(handler)
	defer server.Close()

	drycc, err := drycc.New(false, server.URL, "abc")
	if err != nil {
		t.Fatal(err)
	}

	actual, _, err := List(drycc, "example-go", 100)

	if err != nil {
		t.Fatal(err)
	}

	if !reflect.DeepEqual(expected, actual) {
		t.Error(fmt.Errorf("Expected %v, Got %v", expected, actual))
	}
}

func TestExec(t *testing.T) {
	var once sync.Once
	var addr string

	once.Do(func() {
		http.Handle(
			"/v2/apps/example-go/pods/example-go-web-111/exec/",
			websocket.Handler(func(conn *websocket.Conn) {
				io.Copy(conn, conn)
			}),
		)
		server := httptest.NewServer(nil)
		addr = server.Listener.Addr().String()
		log.Print("Test WebSocket server listening on ", addr)
	})

	drycc, err := drycc.New(false, addr, "abc")
	if err != nil {
		t.Fatal(err)
	}

	expected := api.Command{
		Tty:     true,
		Stdin:   true,
		Command: []string{"/bin/sh"},
	}

	conn, err := Exec(drycc, "example-go", "example-go-web-111", expected)
	if err != nil {
		t.Fatal(err)
	}
	var actual api.Command
	err = websocket.JSON.Receive(conn, &actual)
	if err != nil {
		t.Fatal(err)
	}
	if !reflect.DeepEqual(actual, expected) {
		t.Errorf("Expected: %v, Got %v", expected, actual)
	}
}

func TestPodLogs(t *testing.T) {
	var once sync.Once
	var addr string

	once.Do(func() {
		http.Handle(
			"/v2/apps/example-go/pods/example-go-web-111/logs/",
			websocket.Handler(func(conn *websocket.Conn) {
				io.Copy(conn, conn)
			}),
		)
		server := httptest.NewServer(nil)
		addr = server.Listener.Addr().String()
		log.Print("Test WebSocket server listening on ", addr)
	})

	drycc, err := drycc.New(false, addr, "abc")
	if err != nil {
		t.Fatal(err)
	}

	expected := api.PodLogsRequest{
		Lines:     100,
		Follow:    true,
		Container: "runner",
	}

	conn, err := Logs(drycc, "example-go", "example-go-web-111", expected)
	if err != nil {
		t.Fatal(err)
	}
	var actual api.PodLogsRequest
	err = websocket.JSON.Receive(conn, &actual)
	if err != nil {
		t.Fatal(err)
	}
	if !reflect.DeepEqual(actual, expected) {
		t.Errorf("Expected: %v, Got %v", expected, actual)
	}
}

func TestDescribe(t *testing.T) {
	t.Parallel()

	handler := fakeHTTPServer{}
	server := httptest.NewServer(&handler)
	defer server.Close()

	drycc, err := drycc.New(false, server.URL, "abc")
	if err != nil {
		t.Fatal(err)
	}
	actual, _, err := Describe(drycc, "example-go", "test-pod-web", 100)
	if err != nil {
		t.Error(err)
	}
	expected := api.PodState{
		{
			Container: "web",
			Image:     "registry.drycc.cc/base/base",
			Command:   []string{"bash", "-c"},
			Args:      []string{"sleep 3600s"},
			State: map[string]map[string]interface{}{
				"running": {
					"startedAt": "2024-05-21T02:27:03+00:00",
				},
				"waiting": {
					"message": "container create failed: executable file './start.sh' not found in $PATH: No such file or directory\n",
					"reason":  "CreateContainerError",
				},
			},
			LastState: map[string]map[string]interface{}{
				"terminated": {
					"containerID": "cri-o://ccfc73b0b4d966af4f93ca871a04fa97460620cd8005c1c36f7734a08ba49ed0",
					"exitCode":    1,
					"finishedAt":  "2024-05-21T02:27:03+00:00",
					"reason":      "Error",
					"startedAt":   "2024-05-21T02:26:33+00:00",
				},
			},
			Ready:        true,
			RestartCount: 1,
		},
	}
	if !reflect.DeepEqual(actual[0].State, expected[0].State) {
		t.Error(fmt.Errorf("Expected %v, Got %v", actual[0].State, expected[0].State))
	}
}

func TestByType(t *testing.T) {
	t.Parallel()

	started := "2016-02-13T00:47:52"

	expected := api.PodTypes{
		{
			Ptype: "abc",
			PodsList: api.PodsList{
				{Type: "abc", Name: "1", Started: started},
				{Type: "abc", Name: "2", Started: started},
				{Type: "abc", Name: "3", Started: started},
			},
		},
		{
			Ptype: "web",
			PodsList: api.PodsList{
				{Type: "web", Name: "test1", Started: started},
				{Type: "web", Name: "test2", Started: started},
				{Type: "web", Name: "test3", Started: started},
			},
		},
		{
			Ptype: "worker",
			PodsList: api.PodsList{
				{Type: "worker", Name: "a", Started: started},
				{Type: "worker", Name: "b", Started: started},
				{Type: "worker", Name: "c", Started: started},
			},
		},
	}

	input := api.PodsList{
		{Type: "worker", Name: "c", Started: started},
		{Type: "abc", Name: "2", Started: started},
		{Type: "worker", Name: "b", Started: started},
		{Type: "web", Name: "test1", Started: started},
		{Type: "web", Name: "test3", Started: started},
		{Type: "abc", Name: "1", Started: started},
		{Type: "worker", Name: "a", Started: started},
		{Type: "abc", Name: "3", Started: started},
		{Type: "web", Name: "test2", Started: started},
	}

	actual := ByType(input)

	if !reflect.DeepEqual(actual, expected) {
		t.Errorf("Expected: %v, Got %v", expected, actual)
	}
}

func TestPodsDelete(t *testing.T) {
	t.Parallel()

	handler := fakeHTTPServer{}
	server := httptest.NewServer(handler)
	defer server.Close()

	drycc, err := drycc.New(false, server.URL, "abc")
	if err != nil {
		t.Fatal(err)
	}

	if err = Delete(drycc, "example-go", "test-pod-web"); err != nil {
		t.Fatal(err)
	}
}