package commands

import (
	"context"
	"fmt"
	"os"
	"strconv"
	"strings"
	"text/tabwriter"

	"github.com/fatih/color"
	api "github.com/porter-dev/porter/api/client"
	"github.com/porter-dev/porter/api/types"
	"github.com/porter-dev/porter/cli/cmd/config"
	"github.com/porter-dev/porter/cli/cmd/utils"
	"github.com/spf13/cobra"
)

func registerCommand_Registry(cliConf config.CLIConfig) *cobra.Command {
	registryCmd := &cobra.Command{
		Use:     "registry",
		Aliases: []string{"registries"},
		Short:   "Commands that read from a connected registry",
	}

	registryListCmd := &cobra.Command{
		Use:   "list",
		Short: "Lists the registries linked to a project",
		Run: func(cmd *cobra.Command, args []string) {
			err := checkLoginAndRunWithConfig(cmd, cliConf, args, listRegistries)
			if err != nil {
				os.Exit(1)
			}
		},
	}

	registryDeleteCmd := &cobra.Command{
		Use:   "delete [id]",
		Args:  cobra.ExactArgs(1),
		Short: "Deletes the registry with the given id",
		Run: func(cmd *cobra.Command, args []string) {
			err := checkLoginAndRunWithConfig(cmd, cliConf, args, deleteRegistry)
			if err != nil {
				os.Exit(1)
			}
		},
	}

	registryReposCmd := &cobra.Command{
		Use:     "repo",
		Aliases: []string{"repos", "repository", "repositories"},
		Short:   "Commands that perform operations on image registry repositories",
	}

	registryReposListCmd := &cobra.Command{
		Use:   "list",
		Short: "Lists the repositories in an image registry",
		Run: func(cmd *cobra.Command, args []string) {
			err := checkLoginAndRunWithConfig(cmd, cliConf, args, listRepos)
			if err != nil {
				os.Exit(1)
			}
		},
	}

	registryImageCmd := &cobra.Command{
		Use:     "image",
		Aliases: []string{"images"},
		Short:   "Commands that perform operations on image in a repository",
	}

	registryImageListCmd := &cobra.Command{
		Use:   "list [repo_name]",
		Args:  cobra.ExactArgs(1),
		Short: "Lists the images the specified image repository",
		Run: func(cmd *cobra.Command, args []string) {
			err := checkLoginAndRunWithConfig(cmd, cliConf, args, listImages)
			if err != nil {
				os.Exit(1)
			}
		},
	}

	registryCmd.PersistentFlags().AddFlagSet(utils.RegistryFlagSet)

	registryCmd.AddCommand(registryReposCmd)
	registryCmd.AddCommand(registryListCmd)
	registryCmd.AddCommand(registryDeleteCmd)

	registryReposCmd.AddCommand(registryReposListCmd)

	registryCmd.AddCommand(registryImageCmd)
	registryImageCmd.AddCommand(registryImageListCmd)

	return registryCmd
}

func listRegistries(ctx context.Context, user *types.GetAuthenticatedUserResponse, client api.Client, cliConf config.CLIConfig, featureFlags config.FeatureFlags, cmd *cobra.Command, args []string) error {
	pID := cliConf.Project

	// get the list of namespaces
	resp, err := client.ListRegistries(
		ctx,
		pID,
	)
	if err != nil {
		return err
	}

	registries := *resp

	w := new(tabwriter.Writer)
	w.Init(os.Stdout, 3, 8, 0, '\t', tabwriter.AlignRight)

	fmt.Fprintf(w, "%s\t%s\t%s\n", "ID", "URL", "SERVICE")

	currRegistryID := cliConf.Registry

	for _, registry := range registries {
		if currRegistryID == registry.ID {
			color.New(color.FgGreen).Fprintf(w, "%d\t%s\t%s (current registry)\n", registry.ID, registry.URL, registry.Service)
		} else {
			fmt.Fprintf(w, "%d\t%s\t%s\n", registry.ID, registry.URL, registry.Service)
		}
	}

	w.Flush()

	return nil
}

func deleteRegistry(ctx context.Context, user *types.GetAuthenticatedUserResponse, client api.Client, cliConf config.CLIConfig, featureFlags config.FeatureFlags, cmd *cobra.Command, args []string) error {
	userResp, err := utils.PromptPlaintext(
		fmt.Sprintf(
			`Are you sure you'd like to delete the registry with id %s? %s `,
			args[0],
			color.New(color.FgCyan).Sprintf("[y/n]"),
		),
	)
	if err != nil {
		return err
	}

	if userResp := strings.ToLower(userResp); userResp == "y" || userResp == "yes" {
		id, err := strconv.ParseUint(args[0], 10, 64)
		if err != nil {
			return err
		}

		err = client.DeleteProjectRegistry(ctx, cliConf.Project, uint(id))

		if err != nil {
			return err
		}

		color.New(color.FgGreen).Printf("Deleted registry with id %d\n", id)
	}

	return nil
}

func listRepos(ctx context.Context, user *types.GetAuthenticatedUserResponse, client api.Client, cliConf config.CLIConfig, featureFlags config.FeatureFlags, cmd *cobra.Command, args []string) error {
	pID := cliConf.Project
	rID := cliConf.Registry

	// get the list of namespaces
	resp, err := client.ListRegistryRepositories(
		ctx,
		pID,
		rID,
	)
	if err != nil {
		return err
	}

	repos := *resp

	w := new(tabwriter.Writer)
	w.Init(os.Stdout, 3, 8, 0, '\t', tabwriter.AlignRight)

	fmt.Fprintf(w, "%s\t%s\n", "NAME", "CREATED_AT")

	for _, repo := range repos {
		fmt.Fprintf(w, "%s\t%s\n", repo.Name, repo.CreatedAt.String())
	}

	w.Flush()

	return nil
}

func listImages(ctx context.Context, user *types.GetAuthenticatedUserResponse, client api.Client, cliConf config.CLIConfig, featureFlags config.FeatureFlags, cmd *cobra.Command, args []string) error {
	pID := cliConf.Project
	rID := cliConf.Registry
	repoName := args[0]

	// get the list of namespaces
	resp, err := client.ListImages(
		ctx,
		pID,
		rID,
		repoName,
	)
	if err != nil {
		return err
	}

	imgs := *resp

	w := new(tabwriter.Writer)
	w.Init(os.Stdout, 3, 8, 0, '\t', tabwriter.AlignRight)

	fmt.Fprintf(w, "%s\t%s\n", "IMAGE", "DIGEST")

	for _, img := range imgs {
		fmt.Fprintf(w, "%s\t%s\n", repoName+":"+img.Tag, img.Digest)
	}

	w.Flush()

	return nil
}