package cmd

import (
	"fmt"
	"os"
	"text/tabwriter"

	"github.com/frenocorp/pop/internal/accounts"
	"github.com/spf13/cobra"
)

func accountsCmd() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "accounts",
		Short: "Manage multiple ProtonMail accounts",
		Long:  `Add, list, switch, and remove named ProtonMail account profiles.`,
	}

	cmd.AddCommand(accountsListCmd())
	cmd.AddCommand(accountsAddCmd())
	cmd.AddCommand(accountsRemoveCmd())
	cmd.AddCommand(accountsDefaultCmd())
	cmd.AddCommand(accountsShowCmd())

	return cmd
}

func accountsListCmd() *cobra.Command {
	return &cobra.Command{
		Use:   "list",
		Short: "List all configured accounts",
		Long:  `Show all saved ProtonMail account profiles.`,
		RunE: func(cmd *cobra.Command, args []string) error {
			store, err := accounts.NewAccountsStore()
			if err != nil {
				return fmt.Errorf("failed to create accounts store: %w", err)
			}

			accts, err := store.LoadAccounts()
			if err != nil {
				return fmt.Errorf("failed to load accounts: %w", err)
			}

			if len(accts) == 0 {
				fmt.Println("No accounts configured. Use 'pop accounts add' to create one.")
				return nil
			}

			w := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
			fmt.Fprintln(w, "Name\tEmail\tDefault\tAPI Base\tCreated")
			fmt.Fprintln(w, "----\t-----\t-------\t--------\t-------")

			for _, acc := range accts {
				def := "-"
				if acc.Default {
					def = "*"
				}
				fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s\n",
					acc.Name, acc.Email, def, acc.APIBaseURL, acc.CreatedAt)
			}

			return w.Flush()
		},
	}
}

func accountsAddCmd() *cobra.Command {
	var name, email, apiURL string
	var isDefault bool

	cmd := &cobra.Command{
		Use:   "add <name>",
		Short: "Add a new account profile",
		Long:  `Add a named ProtonMail account profile for multi-account support.`,
		Args:  cobra.MaximumNArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			accountName := name
			if len(args) > 0 && args[0] != "" {
				accountName = args[0]
			}
			if accountName == "" {
				return fmt.Errorf("account name is required")
			}
			if email == "" {
				return fmt.Errorf("email is required (--email)")
			}

			store, err := accounts.NewAccountsStore()
			if err != nil {
				return fmt.Errorf("failed to create accounts store: %w", err)
			}

			if err := store.AddAccount(accountName, email, apiURL, isDefault); err != nil {
				return fmt.Errorf("failed to add account: %w", err)
			}

			fmt.Printf("Added account: %s (%s)\n", accountName, email)
			if isDefault {
				fmt.Println("Set as default account")
			}
			return nil
		},
	}

	cmd.Flags().StringVar(&name, "name", "", "Account name (or pass as positional argument)")
	cmd.Flags().StringVarP(&email, "email", "e", "", "ProtonMail email address")
	cmd.Flags().StringVar(&apiURL, "api-url", "", "Custom API base URL")
	cmd.Flags().BoolVarP(&isDefault, "default", "d", false, "Set as default account")
	_ = cmd.MarkFlagRequired("email")

	return cmd
}

func accountsRemoveCmd() *cobra.Command {
	return &cobra.Command{
		Use:   "remove <name>",
		Short: "Remove an account profile",
		Long:  `Remove a named ProtonMail account profile.`,
		Args:  cobra.ExactArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			accountName := args[0]

			store, err := accounts.NewAccountsStore()
			if err != nil {
				return fmt.Errorf("failed to create accounts store: %w", err)
			}

			if err := store.RemoveAccount(accountName); err != nil {
				return fmt.Errorf("failed to remove account: %w", err)
			}

			fmt.Printf("Removed account: %s\n", accountName)
			return nil
		},
	}
}

func accountsDefaultCmd() *cobra.Command {
	var setName string

	cmd := &cobra.Command{
		Use:   "default [name]",
		Short: "Get or set the default account",
		Long:  `Show the current default account, or set a new default.`,
		Args:  cobra.MaximumNArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			store, err := accounts.NewAccountsStore()
			if err != nil {
				return fmt.Errorf("failed to create accounts store: %w", err)
			}

			if setName == "" && len(args) > 0 {
				setName = args[0]
			}

			if setName != "" {
				if err := store.SetDefaultAccount(setName); err != nil {
					return fmt.Errorf("failed to set default account: %w", err)
				}
				fmt.Printf("Set default account to: %s\n", setName)
				return nil
			}

			acct, err := store.GetAccount("")
			if err != nil {
				return fmt.Errorf("no default account: %w", err)
			}
			fmt.Printf("Default account: %s (%s)\n", acct.Name, acct.Email)
			return nil
		},
	}

	cmd.Flags().StringVar(&setName, "set", "", "Set default account to this name")

	return cmd
}

func accountsShowCmd() *cobra.Command {
	return &cobra.Command{
		Use:   "show <name>",
		Short: "Show account details",
		Long:  `Display details for a specific account profile.`,
		Args:  cobra.ExactArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			accountName := args[0]

			store, err := accounts.NewAccountsStore()
			if err != nil {
				return fmt.Errorf("failed to create accounts store: %w", err)
			}

			acct, err := store.GetAccount(accountName)
			if err != nil {
				return fmt.Errorf("failed to get account: %w", err)
			}

			fmt.Printf("Name:       %s\n", acct.Name)
			fmt.Printf("Email:      %s\n", acct.Email)
			fmt.Printf("UID:        %s\n", acct.UID)
			fmt.Printf("API Base:   %s\n", acct.APIBaseURL)
			fmt.Printf("Default:    %t\n", acct.Default)
			fmt.Printf("Created:    %s\n", acct.CreatedAt)
			if acct.LastUsedAt != "" {
				fmt.Printf("Last Used:  %s\n", acct.LastUsedAt)
			}

			return nil
		},
	}
}