package cmd

import (
	"context"
	"fmt"
	"strings"

	"github.com/spf13/cobra"
	"github.com/spf13/viper"
	"github.com/turbot/go-kit/helpers"
	"github.com/turbot/steampipe/pkg/cmdconfig"
	"github.com/turbot/steampipe/pkg/constants"
	"github.com/turbot/steampipe/pkg/error_helpers"
	"github.com/turbot/steampipe/pkg/filepaths"
	"github.com/turbot/steampipe/pkg/modinstaller"
	"github.com/turbot/steampipe/pkg/steampipeconfig/modconfig"
	"github.com/turbot/steampipe/pkg/steampipeconfig/parse"
	"github.com/turbot/steampipe/pkg/utils"
)

// mod management commands
func modCmd() *cobra.Command {
	var cmd = &cobra.Command{
		Use:   "mod [command]",
		Args:  cobra.NoArgs,
		Short: "Steampipe mod management",
		Long: `Steampipe mod management.

Mods enable you to run, build, and share dashboards, benchmarks and other resources.

Find pre-built mods in the public registry at https://hub.steampipe.io.

Examples:

    # Create a new mod in the current directory
    steampipe mod init

    # Install a mod
    steampipe mod install github.com/turbot/steampipe-mod-aws-compliance
    
    # Update a mod
    steampipe mod update github.com/turbot/steampipe-mod-aws-compliance
    
    # List installed mods
    steampipe mod list
    
    # Uninstall a mod
    steampipe mod uninstall github.com/turbot/steampipe-mod-aws-compliance
	`,
	}

	cmd.AddCommand(modInstallCmd())
	cmd.AddCommand(modUninstallCmd())
	cmd.AddCommand(modUpdateCmd())
	cmd.AddCommand(modListCmd())
	cmd.AddCommand(modInitCmd())
	cmd.Flags().BoolP(constants.ArgHelp, "h", false, "Help for mod")

	cmdconfig.OnCmd(cmd).
		AddModLocationFlag()

	return cmd
}

// install
func modInstallCmd() *cobra.Command {
	var cmd = &cobra.Command{
		Use:   "install",
		Run:   runModInstallCmd,
		Short: "Install one or more mods and their dependencies",
		Long: `Install one or more mods and their dependencies.

Mods provide an easy way to share Steampipe queries, controls, and benchmarks.
Find mods using the public registry at hub.steampipe.io.

Examples:

  # Install a mod(steampipe-mod-aws-compliance)
  steampipe mod install github.com/turbot/steampipe-mod-aws-compliance

  # Install a specific version of a mod
  steampipe mod install github.com/turbot/steampipe-mod-aws-compliance@0.1

  # Install a version of a mod using a semver constraint
  steampipe mod install github.com/turbot/steampipe-mod-aws-compliance@'^1'

  # Install all mods specified in the mod.sp and their dependencies
  steampipe mod install

  # Preview what steampipe mod install will do, without actually installing anything
  steampipe mod install --dry-run`,
	}

	cmdconfig.OnCmd(cmd).
		AddBoolFlag(constants.ArgPrune, true, "Remove unused dependencies after installation is complete").
		AddBoolFlag(constants.ArgDryRun, false, "Show which mods would be installed/updated/uninstalled without modifying them").
		AddBoolFlag(constants.ArgForce, false, "Install mods even if plugin/cli version requirements are not met (cannot be used with --dry-run)").
		AddBoolFlag(constants.ArgHelp, false, "Help for install", cmdconfig.FlagOptions.WithShortHand("h")).
		AddModLocationFlag()

	return cmd
}

func runModInstallCmd(cmd *cobra.Command, args []string) {
	ctx := cmd.Context()
	utils.LogTime("cmd.runModInstallCmd")
	defer func() {
		utils.LogTime("cmd.runModInstallCmd end")
		if r := recover(); r != nil {
			error_helpers.ShowError(ctx, helpers.ToError(r))
			exitCode = constants.ExitCodeUnknownErrorPanic
		}
	}()

	// try to load the workspace mod definition
	// - if it does not exist, this will return a nil mod and a nil error
	workspacePath := viper.GetString(constants.ArgModLocation)
	workspaceMod, err := parse.LoadModfile(workspacePath)
	error_helpers.FailOnErrorWithMessage(err, "failed to load mod definition")

	// if no mod was loaded, create a default
	if workspaceMod == nil {
		workspaceMod, err = createWorkspaceMod(ctx, cmd, workspacePath)
		if err != nil {
			exitCode = constants.ExitCodeModInstallFailed
			error_helpers.FailOnError(err)
		}
	}

	// if any mod names were passed as args, convert into formed mod names
	opts := modinstaller.NewInstallOpts(workspaceMod, args...)
	trimGitUrls(opts)
	installData, err := modinstaller.InstallWorkspaceDependencies(ctx, opts)
	if err != nil {
		exitCode = constants.ExitCodeModInstallFailed
		error_helpers.FailOnError(err)
	}

	fmt.Println(modinstaller.BuildInstallSummary(installData))
}

// uninstall
func modUninstallCmd() *cobra.Command {
	var cmd = &cobra.Command{
		Use:   "uninstall",
		Run:   runModUninstallCmd,
		Short: "Uninstall a mod and its dependencies",
		Long: `Uninstall a mod and its dependencies.

Example:
  
  # Uninstall a mod
  steampipe mod uninstall github.com/turbot/steampipe-mod-azure-compliance`,
	}

	cmdconfig.OnCmd(cmd).
		AddBoolFlag(constants.ArgPrune, true, "Remove unused dependencies after uninstallation is complete").
		AddBoolFlag(constants.ArgDryRun, false, "Show which mods would be uninstalled without modifying them").
		AddBoolFlag(constants.ArgHelp, false, "Help for uninstall", cmdconfig.FlagOptions.WithShortHand("h")).
		AddModLocationFlag()

	return cmd
}

func runModUninstallCmd(cmd *cobra.Command, args []string) {
	ctx := cmd.Context()
	utils.LogTime("cmd.runModInstallCmd")
	defer func() {
		utils.LogTime("cmd.runModInstallCmd end")
		if r := recover(); r != nil {
			error_helpers.ShowError(ctx, helpers.ToError(r))
			exitCode = constants.ExitCodeUnknownErrorPanic
		}
	}()

	// try to load the workspace mod definition
	// - if it does not exist, this will return a nil mod and a nil error
	workspaceMod, err := parse.LoadModfile(viper.GetString(constants.ArgModLocation))
	error_helpers.FailOnErrorWithMessage(err, "failed to load mod definition")
	if workspaceMod == nil {
		fmt.Println("No mods installed.")
		return
	}
	opts := modinstaller.NewInstallOpts(workspaceMod, args...)
	trimGitUrls(opts)
	installData, err := modinstaller.UninstallWorkspaceDependencies(ctx, opts)
	error_helpers.FailOnError(err)

	fmt.Println(modinstaller.BuildUninstallSummary(installData))
}

// update
func modUpdateCmd() *cobra.Command {
	var cmd = &cobra.Command{
		Use:   "update",
		Run:   runModUpdateCmd,
		Short: "Update one or more mods and their dependencies",
		Long: `Update one or more mods and their dependencies.

Example:

  # Update a mod to the latest version allowed by its current constraint
  steampipe mod update github.com/turbot/steampipe-mod-aws-compliance

  # Update all mods specified in the mod.sp and their dependencies to the latest versions that meet their constraints, and install any that are missing
  steampipe mod update`,
	}

	cmdconfig.OnCmd(cmd).
		AddBoolFlag(constants.ArgPrune, true, "Remove unused dependencies after update is complete").
		AddBoolFlag(constants.ArgForce, false, "Update mods even if plugin/cli version requirements are not met (cannot be used with --dry-run)").
		AddBoolFlag(constants.ArgDryRun, false, "Show which mods would be updated without modifying them").
		AddBoolFlag(constants.ArgHelp, false, "Help for update", cmdconfig.FlagOptions.WithShortHand("h")).
		AddModLocationFlag()

	return cmd
}

func runModUpdateCmd(cmd *cobra.Command, args []string) {
	ctx := cmd.Context()
	utils.LogTime("cmd.runModUpdateCmd")
	defer func() {
		utils.LogTime("cmd.runModUpdateCmd end")
		if r := recover(); r != nil {
			error_helpers.ShowError(ctx, helpers.ToError(r))
			exitCode = constants.ExitCodeUnknownErrorPanic
		}
	}()

	// try to load the workspace mod definition
	// - if it does not exist, this will return a nil mod and a nil error
	workspaceMod, err := parse.LoadModfile(viper.GetString(constants.ArgModLocation))
	error_helpers.FailOnErrorWithMessage(err, "failed to load mod definition")
	if workspaceMod == nil {
		fmt.Println("No mods installed.")
		return
	}

	opts := modinstaller.NewInstallOpts(workspaceMod, args...)
	trimGitUrls(opts)
	installData, err := modinstaller.InstallWorkspaceDependencies(ctx, opts)
	error_helpers.FailOnError(err)

	fmt.Println(modinstaller.BuildInstallSummary(installData))
}

// list
func modListCmd() *cobra.Command {
	var cmd = &cobra.Command{
		Use:   "list",
		Run:   runModListCmd,
		Short: "List currently installed mods",
		Long: `List currently installed mods.
		
Example:

  # List installed mods
  steampipe mod list`,
	}

	cmdconfig.OnCmd(cmd).
		AddBoolFlag(constants.ArgHelp, false, "Help for list", cmdconfig.FlagOptions.WithShortHand("h")).
		AddModLocationFlag()
	return cmd
}

func runModListCmd(cmd *cobra.Command, _ []string) {
	ctx := cmd.Context()
	utils.LogTime("cmd.runModListCmd")
	defer func() {
		utils.LogTime("cmd.runModListCmd end")
		if r := recover(); r != nil {
			error_helpers.ShowError(ctx, helpers.ToError(r))
			exitCode = constants.ExitCodeUnknownErrorPanic
		}
	}()

	// try to load the workspace mod definition
	// - if it does not exist, this will return a nil mod and a nil error
	workspaceMod, err := parse.LoadModfile(viper.GetString(constants.ArgModLocation))
	error_helpers.FailOnErrorWithMessage(err, "failed to load mod definition")
	if workspaceMod == nil {
		fmt.Println("No mods installed.")
		return
	}

	opts := modinstaller.NewInstallOpts(workspaceMod)
	installer, err := modinstaller.NewModInstaller(opts)
	error_helpers.FailOnError(err)

	treeString := installer.GetModList()
	if len(strings.Split(treeString, "\n")) > 1 {
		fmt.Println()
	}
	fmt.Println(treeString)
}

// init
func modInitCmd() *cobra.Command {
	var cmd = &cobra.Command{
		Use:   "init",
		Run:   runModInitCmd,
		Short: "Initialize the current directory with a mod.sp file",
		Long: `Initialize the current directory with a mod.sp file.
		
Example:

  # Initialize the current directory with a mod.sp file
  steampipe mod init`,
	}

	cmdconfig.OnCmd(cmd).
		AddBoolFlag(constants.ArgHelp, false, "Help for init", cmdconfig.FlagOptions.WithShortHand("h")).
		AddModLocationFlag()
	return cmd
}

func runModInitCmd(cmd *cobra.Command, args []string) {
	utils.LogTime("cmd.runModInitCmd")
	ctx := cmd.Context()

	defer func() {
		utils.LogTime("cmd.runModInitCmd end")
		if r := recover(); r != nil {
			error_helpers.ShowError(ctx, helpers.ToError(r))
			exitCode = constants.ExitCodeUnknownErrorPanic
		}
	}()
	workspacePath := viper.GetString(constants.ArgModLocation)
	if _, err := createWorkspaceMod(ctx, cmd, workspacePath); err != nil {
		exitCode = constants.ExitCodeModInitFailed
		error_helpers.FailOnError(err)
	}
	fmt.Printf("Created mod definition file '%s'\n", filepaths.ModFilePath(workspacePath))
}

// helpers
func createWorkspaceMod(ctx context.Context, cmd *cobra.Command, workspacePath string) (*modconfig.Mod, error) {
	if !modinstaller.ValidateModLocation(ctx, workspacePath) {
		return nil, fmt.Errorf("mod %s cancelled", cmd.Name())
	}

	if parse.ModfileExists(workspacePath) {
		fmt.Println("Working folder already contains a mod definition file")
		return nil, nil
	}
	mod := modconfig.CreateDefaultMod(workspacePath)
	if err := mod.Save(); err != nil {
		return nil, err
	}

	// load up the written mod file so that we get the updated
	// block ranges
	mod, err := parse.LoadModfile(workspacePath)
	if err != nil {
		return nil, err
	}

	return mod, nil
}

// Modifies(trims) the URL if contains http ot https in arguments
func trimGitUrls(opts *modinstaller.InstallOpts) {
	for i, url := range opts.ModArgs {
		opts.ModArgs[i] = strings.TrimPrefix(url, "http://")
		opts.ModArgs[i] = strings.TrimPrefix(url, "https://")
	}
}