// Copyright (C) 2024 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package main

import (
	"bytes"
	"context"
	"encoding/json"
	"errors"
	"log"
	"os"
	"os/exec"
	"path/filepath"
	"testing"

	"github.com/google/android-cuttlefish/e2etests/orchestration/common"

	hoapi "github.com/google/android-cuttlefish/frontend/src/host_orchestrator/api/v1"
	hoclient "github.com/google/android-cuttlefish/frontend/src/libhoclient"
	"github.com/google/go-cmp/cmp"
)

const baseURL = "http://0.0.0.0:2080"

func TestInstance(t *testing.T) {
	srv := hoclient.NewHostOrchestratorClient(baseURL)
	t.Cleanup(func() {
		if err := common.CollectHOLogs(baseURL); err != nil {
			log.Printf("failed to collect HO logs: %s", err)
		}
	})
	imageDir, err := uploadImages(srv, "../artifacts/images.zip")
	if err != nil {
		t.Fatal(err)
	}
	hostPkgDir, err := common.PrepareArtifact(srv, "../artifacts/cvd-host_package.tar.gz")
	if err != nil {
		t.Fatal(err)
	}
	const group_name = "foo"
	config := `
  {
    "common": {
      "group_name": "` + group_name + `",
      "host_package": "@image_dirs/` + hostPkgDir + `"
    },
    "instances": [
      {
        "vm": {
          "memory_mb": 8192,
          "setupwizard_mode": "OPTIONAL",
          "cpus": 8
        },
        "disk": {
          "default_build": "@image_dirs/` + imageDir + `"
        },
        "streaming": {
          "device_id": "cvd-1"
        }
      }
    ]
  }
  `
	envConfig := make(map[string]interface{})
	if err := json.Unmarshal([]byte(config), &envConfig); err != nil {
		t.Fatal(err)
	}
	createReq := &hoapi.CreateCVDRequest{
		EnvConfig: envConfig,
	}

	got, createErr := srv.CreateCVD(createReq, &hoclient.AccessTokenBuildAPICreds{})

	if err := common.DownloadHostBugReport(srv, group_name); err != nil {
		t.Errorf("failed creating bugreport: %s\n", err)
	}
	if createErr != nil {
		t.Fatal(createErr)
	}
	if err := common.VerifyLogsEndpoint(baseURL, group_name, "1"); err != nil {
		t.Fatalf("failed verifying /logs endpoint: %s", err)
	}
	want := &hoapi.CreateCVDResponse{
		CVDs: []*hoapi.CVD{
			{
				Group:          group_name,
				Name:           "1",
				BuildSource:    &hoapi.BuildSource{},
				Status:         "Running",
				Displays:       []string{"720 x 1280 ( 320 )"},
				WebRTCDeviceID: "cvd-1",
				ADBSerial:      "0.0.0.0:6520",
			},
		},
	}
	if diff := cmp.Diff(want, got); diff != "" {
		t.Errorf("response mismatch (-want +got):\n%s", diff)
	}
}

func uploadImages(srv hoclient.HostOrchestratorClient, imgsZipSrc string) (string, error) {
	outDir := "/tmp/aosp_cf_x86_64_only_phone-img-13625421"
	if err := runCmd("unzip", "-d", outDir, imgsZipSrc); err != nil {
		return "", err
	}
	defer os.Remove(outDir)
	entries, err := os.ReadDir(outDir)
	if err != nil {
		return "", err
	}
	res := hoapi.CreateImageDirectoryResponse{}
	if op, err := srv.CreateImageDirectory(); err != nil {
		return "", err
	} else if err := srv.WaitForOperation(op.Name, &res); err != nil {
		return "", err
	}
	for _, e := range entries {
		filename := filepath.Join(outDir, e.Name())
		if err := srv.UploadArtifact(filename); err != nil {
			return "", err
		}
		if op, err := srv.UpdateImageDirectoryWithUserArtifact(res.ID, filename); err != nil {
			return "", err
		} else if err := srv.WaitForOperation(op.Name, nil); err != nil {
			return "", err
		}

	}
	return res.ID, nil
}

func runCmd(name string, args ...string) error {
	cmd := exec.CommandContext(context.TODO(), name, args...)
	var stderr bytes.Buffer
	cmd.Stdout = nil
	cmd.Stderr = &stderr
	err := cmd.Run()
	if err != nil {
		return errors.New(stderr.String())
	}
	return nil
}