// Copyright (c) 2024 Sidero Labs, Inc.
//
// Use of this software is governed by the Business Source License
// included in the LICENSE file.

package main

import (
	"context"
	"errors"
	"fmt"
	"net/url"
	"os"
	"os/exec"
	"os/signal"
	"strconv"
	"time"

	"github.com/mattn/go-shellwords"
	"github.com/spf13/cobra"

	"github.com/siderolabs/omni/client/pkg/compression"
	clientconsts "github.com/siderolabs/omni/client/pkg/constants"
	"github.com/siderolabs/omni/cmd/integration-test/pkg/clientconfig"
	"github.com/siderolabs/omni/cmd/integration-test/pkg/tests"
	"github.com/siderolabs/omni/internal/pkg/constants"
)

// rootCmd represents the base command when called without any subcommands.
var rootCmd = &cobra.Command{
	Use:   "omni-integration-test",
	Short: "Omni integration test runner.",
	Long:  ``,
	PersistentPreRunE: func(*cobra.Command, []string) error {
		return compression.InitConfig(true)
	},
	RunE: func(*cobra.Command, []string) error {
		return withContext(func(ctx context.Context) error {
			// hacky hack
			os.Args = append(os.Args[0:1], "-test.v", "-test.parallel", strconv.FormatInt(rootCmdFlags.parallel, 10), "-test.timeout", rootCmdFlags.testsTimeout.String())

			testOptions := tests.Options{
				RunTestPattern: rootCmdFlags.runTestPattern,

				ExpectedMachines:  rootCmdFlags.expectedMachines,
				CleanupLinks:      rootCmdFlags.cleanupLinks,
				RunStatsCheck:     rootCmdFlags.runStatsCheck,
				ProvisionMachines: rootCmdFlags.provisionMachinesCount,

				MachineOptions:           rootCmdFlags.machineOptions,
				AnotherTalosVersion:      rootCmdFlags.anotherTalosVersion,
				AnotherKubernetesVersion: rootCmdFlags.anotherKubernetesVersion,
				OmnictlPath:              rootCmdFlags.omnictlPath,
				InfraProvider:            rootCmdFlags.infraProvider,
			}

			if rootCmdFlags.restartAMachineScript != "" {
				parsedScript, err := shellwords.Parse(rootCmdFlags.restartAMachineScript)
				if err != nil {
					return fmt.Errorf("error parsing restart a machine script: %w", err)
				}

				testOptions.RestartAMachineFunc = func(ctx context.Context, uuid string) error {
					return execCmd(ctx, parsedScript, uuid)
				}
			}

			if rootCmdFlags.wipeAMachineScript != "" {
				parsedScript, err := shellwords.Parse(rootCmdFlags.wipeAMachineScript)
				if err != nil {
					return fmt.Errorf("error parsing wipe a machine script: %w", err)
				}

				testOptions.WipeAMachineFunc = func(ctx context.Context, uuid string) error {
					return execCmd(ctx, parsedScript, uuid)
				}
			}

			if rootCmdFlags.freezeAMachineScript != "" {
				parsedScript, err := shellwords.Parse(rootCmdFlags.freezeAMachineScript)
				if err != nil {
					return fmt.Errorf("error parsing freeze a machine script: %w", err)
				}

				testOptions.FreezeAMachineFunc = func(ctx context.Context, uuid string) error {
					return execCmd(ctx, parsedScript, uuid)
				}
			}

			u, err := url.Parse(rootCmdFlags.endpoint)
			if err != nil {
				return errors.New("error parsing endpoint")
			}

			if u.Scheme == "grpc" {
				u.Scheme = "http"
			}

			testOptions.HTTPEndpoint = u.String()

			clientConfig := clientconfig.New(rootCmdFlags.endpoint)
			defer clientConfig.Close() //nolint:errcheck

			return tests.Run(ctx, clientConfig, testOptions)
		})
	},
}

func execCmd(ctx context.Context, parsedScript []string, args ...string) error {
	cmd := exec.CommandContext(ctx, parsedScript[0], append(parsedScript[1:], args...)...)
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr

	return cmd.Run()
}

//nolint:govet
var rootCmdFlags struct {
	endpoint       string
	runTestPattern string
	infraProvider  string

	provisionMachinesCount int
	expectedMachines       int
	parallel               int64
	cleanupLinks           bool
	runStatsCheck          bool

	testsTimeout time.Duration

	restartAMachineScript    string
	wipeAMachineScript       string
	freezeAMachineScript     string
	anotherTalosVersion      string
	anotherKubernetesVersion string
	omnictlPath              string

	machineOptions tests.MachineOptions
}

func init() {
	rootCmd.PersistentFlags().StringVar(&rootCmdFlags.endpoint, "endpoint", "grpc://127.0.0.1:8080", "The endpoint of the Omni API.")
	rootCmd.Flags().StringVar(&rootCmdFlags.runTestPattern, "test.run", "", "tests to run (regular expression)")
	rootCmd.Flags().IntVar(&rootCmdFlags.expectedMachines, "expected-machines", 4, "minimum number of machines expected")
	rootCmd.Flags().StringVar(&rootCmdFlags.restartAMachineScript, "restart-a-machine-script", "hack/test/restart-a-vm.sh", "a script to run to restart a machine by UUID (optional)")
	rootCmd.Flags().StringVar(&rootCmdFlags.wipeAMachineScript, "wipe-a-machine-script", "hack/test/wipe-a-vm.sh", "a script to run to wipe a machine by UUID (optional)")
	rootCmd.Flags().StringVar(&rootCmdFlags.freezeAMachineScript, "freeze-a-machine-script", "hack/test/freeze-a-vm.sh", "a script to run to freeze a machine by UUID (optional)")
	rootCmd.Flags().StringVar(&rootCmdFlags.omnictlPath, "omnictl-path", "", "omnictl CLI script path (optional)")
	rootCmd.Flags().StringVar(&rootCmdFlags.anotherTalosVersion, "another-talos-version",
		constants.AnotherTalosVersion,
		"Talos version for upgrade test",
	)
	rootCmd.Flags().StringVar(
		&rootCmdFlags.machineOptions.TalosVersion,
		"talos-version",
		clientconsts.DefaultTalosVersion,
		"installer version for workload clusters",
	)
	rootCmd.Flags().StringVar(&rootCmdFlags.machineOptions.KubernetesVersion, "kubernetes-version", constants.DefaultKubernetesVersion, "Kubernetes version for workload clusters")
	rootCmd.Flags().StringVar(&rootCmdFlags.anotherKubernetesVersion, "another-kubernetes-version", constants.AnotherKubernetesVersion, "Kubernetes version for upgrade tests")
	rootCmd.Flags().Int64VarP(&rootCmdFlags.parallel, "parallel", "p", 4, "tests parallelism")
	rootCmd.Flags().DurationVarP(&rootCmdFlags.testsTimeout, "timeout", "t", time.Hour, "tests global timeout")
	rootCmd.Flags().BoolVar(&rootCmdFlags.cleanupLinks, "cleanup-links", false, "remove all links after the tests are complete")
	rootCmd.Flags().BoolVar(&rootCmdFlags.runStatsCheck, "run-stats-check", false, "runs stats check after the test is complete")
	rootCmd.Flags().IntVar(&rootCmdFlags.provisionMachinesCount, "provision-machines", 0, "provisions machines through the infrastructure provider")
	rootCmd.Flags().StringVar(&rootCmdFlags.infraProvider, "infra-provider", "talemu", "use infra provider with the specified ID when provisioning the machines")
}

// withContext wraps with CLI context.
func withContext(f func(ctx context.Context) error) error {
	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
	defer stop()

	return f(ctx)
}