package cmd

import (
	"context"
	"fmt"
	"github.com/turbot/steampipe-plugin-sdk/v4/plugin"
	"log"
	"os"
	"runtime/debug"
	"strings"
	"time"

	"github.com/hashicorp/go-hclog"
	"github.com/mattn/go-isatty"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
	"github.com/turbot/go-kit/helpers"
	"github.com/turbot/steampipe-plugin-sdk/v4/logging"
	"github.com/turbot/steampipe/pkg/cmdconfig"
	"github.com/turbot/steampipe/pkg/constants"
	"github.com/turbot/steampipe/pkg/filepaths"
	"github.com/turbot/steampipe/pkg/migrate"
	"github.com/turbot/steampipe/pkg/ociinstaller/versionfile"
	"github.com/turbot/steampipe/pkg/statefile"
	"github.com/turbot/steampipe/pkg/statushooks"
	"github.com/turbot/steampipe/pkg/steampipeconfig"
	"github.com/turbot/steampipe/pkg/task"
	"github.com/turbot/steampipe/pkg/utils"
	"github.com/turbot/steampipe/pkg/version"
)

var exitCode int

// rootCmd represents the base command when called without any subcommands
var rootCmd = &cobra.Command{
	Use:     "steampipe [--version] [--help] COMMAND [args]",
	Version: version.SteampipeVersion.String(),
	PersistentPreRun: func(cmd *cobra.Command, args []string) {
		utils.LogTime("cmd.root.PersistentPreRun start")
		defer utils.LogTime("cmd.root.PersistentPreRun end")

		viper.Set(constants.ConfigKeyActiveCommand, cmd)
		viper.Set(constants.ConfigKeyActiveCommandArgs, args)
		viper.Set(constants.ConfigKeyIsTerminalTTY, isatty.IsTerminal(os.Stdout.Fd()))

		createLogger()
		initGlobalConfig()
		task.RunTasks()
		// TODO enable this when we move to go 1.19
		// set the max memory
		debug.SetMemoryLimit(plugin.GetMaxMemoryBytes())
	},
	Short: "Query cloud resources using SQL",
	Long: `Query cloud resources using SQL.

The available commands for execution are listed below.
The most common, useful commands are shown first, followed by
less common or more advanced commands. If you're just getting
started with Steampipe, stick with the common commands. For the
other commands, please read the help and docs before usage.

Getting started:

  # Interactive SQL query console
  steampipe query

  # Execute a defined SQL query
  steampipe query "select * from aws_s3_bucket"

  # Install a plugin
  steampipe plugin install azure

  # Get help for a command
  steampipe help query

  Documentation available at https://steampipe.io/docs
 `,
}

func InitCmd() {
	utils.LogTime("cmd.root.InitCmd start")
	defer utils.LogTime("cmd.root.InitCmd end")

	rootCmd.PersistentFlags().String(constants.ArgInstallDir, filepaths.DefaultInstallDir, fmt.Sprintf("Path to the Config Directory (defaults to %s)", filepaths.DefaultInstallDir))
	rootCmd.PersistentFlags().String(constants.ArgWorkspace, "", "Path to the workspace working directory")
	rootCmd.PersistentFlags().String(constants.ArgWorkspaceChDir, "", "Path to the workspace working directory")
	rootCmd.PersistentFlags().String(constants.ArgCloudHost, "cloud.steampipe.io", "Steampipe Cloud host")
	rootCmd.PersistentFlags().String(constants.ArgCloudToken, "", "Steampipe Cloud authentication token")
	rootCmd.PersistentFlags().String(constants.ArgWorkspaceDatabase, "local", "Steampipe Cloud workspace database")
	rootCmd.PersistentFlags().Bool(constants.ArgSchemaComments, true, "Include schema comments when importing connection schemas")

	rootCmd.Flag(constants.ArgWorkspace).Deprecated = "please use workspace-chdir"

	err := viper.BindPFlag(constants.ArgInstallDir, rootCmd.PersistentFlags().Lookup(constants.ArgInstallDir))
	utils.FailOnError(err)
	err = viper.BindPFlag(constants.ArgWorkspace, rootCmd.PersistentFlags().Lookup(constants.ArgWorkspace))
	utils.FailOnError(err)
	err = viper.BindPFlag(constants.ArgWorkspaceChDir, rootCmd.PersistentFlags().Lookup(constants.ArgWorkspaceChDir))
	utils.FailOnError(err)
	err = viper.BindPFlag(constants.ArgCloudHost, rootCmd.PersistentFlags().Lookup(constants.ArgCloudHost))
	utils.FailOnError(err)
	err = viper.BindPFlag(constants.ArgCloudToken, rootCmd.PersistentFlags().Lookup(constants.ArgCloudToken))
	utils.FailOnError(err)
	err = viper.BindPFlag(constants.ArgWorkspaceDatabase, rootCmd.PersistentFlags().Lookup(constants.ArgWorkspaceDatabase))
	utils.FailOnError(err)
	err = viper.BindPFlag(constants.ArgSchemaComments, rootCmd.PersistentFlags().Lookup(constants.ArgSchemaComments))
	utils.FailOnError(err)

	AddCommands()

	// disable auto completion generation, since we don't want to support
	// powershell yet - and there's no way to disable powershell in the default generator
	rootCmd.CompletionOptions.DisableDefaultCmd = true
	rootCmd.Flags().BoolP(constants.ArgHelp, "h", false, "Help for steampipe")
	rootCmd.Flags().BoolP(constants.ArgVersion, "v", false, "Version for steampipe")

	hideRootFlags(constants.ArgSchemaComments)

	// tell OS to reclaim memory immediately
	os.Setenv("GODEBUG", "madvdontneed=1")

}

func hideRootFlags(flags ...string) {
	for _, flag := range flags {
		rootCmd.Flag(flag).Hidden = true
	}
}

// initConfig reads in config file and ENV variables if set.
func initGlobalConfig() {
	utils.LogTime("cmd.root.initGlobalConfig start")
	defer utils.LogTime("cmd.root.initGlobalConfig end")

	// setup viper with the essential path config (workspace-chdir and install-dir)
	cmdconfig.BootstrapViper()

	// set the working folder
	workspaceChdir := setWorkspaceChDir()

	// set global containing install dir
	setInstallDir()

	var cmd = viper.Get(constants.ConfigKeyActiveCommand).(*cobra.Command)

	// migrate all legacy config files to use snake casing (migrated in v0.14.0)
	err := migrateLegacyFiles()
	utils.FailOnErrorWithMessage(err, "failed to migrate steampipe data files")

	// load config (this sets the global config steampipeconfig.Config)
	config, err := steampipeconfig.LoadSteampipeConfig(workspaceChdir, cmd.Name())
	utils.FailOnError(err)

	steampipeconfig.GlobalConfig = config

	// set viper config defaults from config and env vars
	cmdconfig.SetViperDefaults(steampipeconfig.GlobalConfig.ConfigMap())

	// now validate all config values have appropriate values
	err = validateConfig()
	utils.FailOnErrorWithMessage(err, "failed to validate config")
}

// migrate all data files to use snake casing for property names
func migrateLegacyFiles() error {

	// skip migration for plugin manager commands because the plugin-manager will have
	// been started by some other steampipe command, which would have done the migration already
	if viper.Get(constants.ConfigKeyActiveCommand).(*cobra.Command).Name() == "plugin-manager" {
		return nil
	}
	return utils.CombineErrors(
		migrate.Migrate(&statefile.State{}, filepaths.LegacyStateFilePath()),
		migrate.Migrate(&steampipeconfig.ConnectionDataMap{}, filepaths.ConnectionStatePath()),
		migrate.Migrate(&versionfile.PluginVersionFile{}, filepaths.PluginVersionFilePath()),
		migrate.Migrate(&versionfile.DatabaseVersionFile{}, filepaths.DatabaseVersionFilePath()),
	)
}

// now validate  config values have appropriate values
func validateConfig() error {
	telemetry := viper.GetString(constants.ArgTelemetry)
	if !helpers.StringSliceContains(constants.TelemetryLevels, telemetry) {
		return fmt.Errorf(`invalid value of 'telemetry' (%s), must be one of: %s`, telemetry, strings.Join(constants.TelemetryLevels, ", "))
	}
	return nil
}

func setWorkspaceChDir() string {
	workspaceChdir := viper.GetString(constants.ArgWorkspaceChDir)
	workspace := viper.GetString(constants.ArgWorkspace)
	if workspace != "" {
		workspaceChdir = workspace

	}
	if workspaceChdir == "" {
		cwd, err := os.Getwd()
		utils.FailOnError(err)
		workspaceChdir = cwd
	}
	viper.Set(constants.ArgWorkspaceChDir, workspaceChdir)
	return workspaceChdir
}

// create a hclog logger with the level specified by the SP_LOG env var
func createLogger() {
	level := logging.LogLevel()

	options := &hclog.LoggerOptions{
		Name:       "steampipe",
		Level:      hclog.LevelFromString(level),
		TimeFn:     func() time.Time { return time.Now().UTC() },
		TimeFormat: "2006-01-02 15:04:05.000 UTC",
	}
	if options.Output == nil {
		options.Output = os.Stderr
	}
	logger := hclog.New(options)
	log.SetOutput(logger.StandardWriter(&hclog.StandardLoggerOptions{InferLevels: true}))
	log.SetPrefix("")
	log.SetFlags(0)
}

// set the top level ~/.steampipe folder (creates if it doesnt exist)
func setInstallDir() {
	utils.LogTime("cmd.root.setInstallDir start")
	defer utils.LogTime("cmd.root.setInstallDir end")

	installDir, err := helpers.Tildefy(viper.GetString(constants.ArgInstallDir))
	utils.FailOnErrorWithMessage(err, "failed to sanitize install directory")
	if _, err := os.Stat(installDir); os.IsNotExist(err) {
		err = os.MkdirAll(installDir, 0755)
		utils.FailOnErrorWithMessage(err, fmt.Sprintf("could not create installation directory: %s", installDir))
	}
	filepaths.SteampipeDir = installDir
}

func AddCommands() {
	// explicitly initialise commands here rather than in init functions to allow us to handle errors from the config load
	rootCmd.AddCommand(
		pluginCmd(),
		queryCmd(),
		checkCmd(),
		serviceCmd(),
		modCmd(),
		generateCompletionScriptsCmd(),
		pluginManagerCmd(),
		dashboardCmd(),
		variableCmd(),
	)
}

func Execute() int {
	utils.LogTime("cmd.root.Execute start")
	defer utils.LogTime("cmd.root.Execute end")

	ctx := createRootContext()

	rootCmd.ExecuteContext(ctx)
	return exitCode
}

// create the root context - add a status renderer
func createRootContext() context.Context {
	var statusRenderer statushooks.StatusHooks = statushooks.NullHooks
	// if the client is a TTY, inject a status spinner
	if isatty.IsTerminal(os.Stdout.Fd()) {
		statusRenderer = statushooks.NewStatusSpinner()
	}

	ctx := statushooks.AddStatusHooksToContext(context.Background(), statusRenderer)
	return ctx
}