package cmd

import (
	"encoding/json"
	"fmt"

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

func contactCmd() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "contact",
		Short: "Manage contacts",
		Long:  `List, add, edit, and delete contacts.`,
	}

	cmd.AddCommand(contactListCmd())
	cmd.AddCommand(contactAddCmd())
	cmd.AddCommand(contactEditCmd())
	cmd.AddCommand(contactDeleteCmd())

	return cmd
}

func contactListCmd() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "list",
		Short: "List all contacts",
		RunE: func(cmd *cobra.Command, args []string) error {
			manager := contact.NewContactManager()
			
			page, _ := cmd.Flags().GetInt("page")
			pageSize, _ := cmd.Flags().GetInt("page-size")
			search, _ := cmd.Flags().GetString("search")
			
			req := contact.ListContactsRequest{
				Page:   page,
				PageSize: pageSize,
				Search: search,
			}
			
			resp, err := manager.List(req)
			if err != nil {
				return fmt.Errorf("failed to list contacts: %w", err)
			}
			
			if len(resp.Contacts) == 0 {
				fmt.Println("No contacts found")
				return nil
			}
			
			data, _ := json.MarshalIndent(resp.Contacts, "", "  ")
			fmt.Println(string(data))
			return nil
		},
	}

	cmd.Flags().IntP("page", "p", 0, "Page number")
	cmd.Flags().IntP("page-size", "n", 10, "Items per page")
	cmd.Flags().StringP("search", "s", "", "Search by email or name")

	return cmd
}

func contactAddCmd() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "add",
		Short: "Add a new contact",
		RunE: func(cmd *cobra.Command, args []string) error {
			email, _ := cmd.Flags().GetString("email")
			name, _ := cmd.Flags().GetString("name")
			phone, _ := cmd.Flags().GetString("phone")
			
			if email == "" {
				return fmt.Errorf("email is required")
			}
			
			manager := contact.NewContactManager()
			req := contact.CreateContactRequest{
				Email:  email,
				Name:   name,
				Phone:  phone,
			}
			
			contact, err := manager.Create(req)
			if err != nil {
				return fmt.Errorf("failed to create contact: %w", err)
			}
			
			data, _ := json.MarshalIndent(contact, "", "  ")
			fmt.Printf("Created contact:\n%s\n", string(data))
			return nil
		},
	}

	cmd.Flags().StringP("email", "e", "", "Contact email (required)")
	cmd.Flags().StringP("name", "n", "", "Contact name")
	cmd.Flags().StringP("phone", "p", "", "Contact phone")

	return cmd
}

func contactEditCmd() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "edit <id>",
		Short: "Edit a contact",
		RunE: func(cmd *cobra.Command, args []string) error {
			if len(args) < 1 {
				return fmt.Errorf("contact ID is required")
			}
			
			id := args[0]
			manager := contact.NewContactManager()
			
			_, err := manager.Get(id)
			if err != nil {
				return fmt.Errorf("failed to get contact: %w", err)
			}
			
			name, _ := cmd.Flags().GetString("name")
			phone, _ := cmd.Flags().GetString("phone")
			address, _ := cmd.Flags().GetString("address")
			notes, _ := cmd.Flags().GetString("notes")
			
			req := contact.UpdateContactRequest{}
			
			// Only set pointer fields when the flag was explicitly changed
			if cmd.Flags().Changed("name") {
				req.Name = &name
			}
			if cmd.Flags().Changed("phone") {
				req.Phone = &phone
			}
			if cmd.Flags().Changed("address") {
				req.Address = &address
			}
			if cmd.Flags().Changed("notes") {
				req.Notes = &notes
			}
			
			updated, err := manager.Update(id, req)
			if err != nil {
				return fmt.Errorf("failed to update contact: %w", err)
			}
			
			data, _ := json.MarshalIndent(updated, "", "  ")
			fmt.Printf("Updated contact:\n%s\n", string(data))
			return nil
		},
	}

	cmd.Flags().StringP("name", "n", "", "New name")
	cmd.Flags().StringP("phone", "p", "", "New phone")
	cmd.Flags().StringP("address", "a", "", "New address")
	cmd.Flags().StringP("notes", "o", "", "New notes")

	return cmd
}

func contactDeleteCmd() *cobra.Command {
	cmd := &cobra.Command{
		Use:   "delete <id>",
		Short: "Delete a contact",
		RunE: func(cmd *cobra.Command, args []string) error {
			if len(args) < 1 {
				return fmt.Errorf("contact ID is required")
			}
			
			id := args[0]
			manager := contact.NewContactManager()
			
			if err := manager.Delete(id); err != nil {
				return fmt.Errorf("failed to delete contact: %w", err)
			}
			
			fmt.Printf("Deleted contact: %s\n", id)
			return nil
		},
	}

	return cmd
}