package handler

import (
	"fmt"

	"github.com/go-telegram/bot/models"
)

func mainKeyboard() models.InlineKeyboardMarkup {
	return models.InlineKeyboardMarkup{
		InlineKeyboard: [][]models.InlineKeyboardButton{
			{
				{Text: "Download", CallbackData: "download"},
				{Text: "Search", CallbackData: "search"},
				{Text: "Settings", CallbackData: "settings"},
			},
			{
				{Text: "History", CallbackData: "history"},
				{Text: "Help", CallbackData: "help"},
			},
		},
	}
}

func backKeyboard() models.InlineKeyboardMarkup {
	return models.InlineKeyboardMarkup{
		InlineKeyboard: [][]models.InlineKeyboardButton{
			{{Text: "Back to Menu", CallbackData: "back_menu"}},
		},
	}
}

func settingsBackKeyboard() models.InlineKeyboardMarkup {
	return models.InlineKeyboardMarkup{
		InlineKeyboard: [][]models.InlineKeyboardButton{
			{{Text: "Back to Settings", CallbackData: "back_settings"}},
		},
	}
}

// formatKeyboard builds a 2-column inline keyboard from labels with corresponding callback data values.
// The prefix is prepended to each data value to form the full callback data.
func formatKeyboard(prefix string, labels, data []string) models.InlineKeyboardMarkup {
	rows := [][]models.InlineKeyboardButton{}
	row := []models.InlineKeyboardButton{}
	for i, label := range labels {
		cb := prefix + data[i]
		row = append(row, models.InlineKeyboardButton{Text: label, CallbackData: cb})
		if len(row) == 2 || i == len(labels)-1 {
			rows = append(rows, row)
			row = nil
		}
	}
	rows = append(rows, []models.InlineKeyboardButton{
		{Text: "Back", CallbackData: "back_step"},
		{Text: "Cancel", CallbackData: "cancel_dl"},
	})
	return models.InlineKeyboardMarkup{InlineKeyboard: rows}
}

// languageKeyboard builds a keyboard from available languages.
func languageKeyboard(languages []string) models.InlineKeyboardMarkup {
	return formatKeyboard("lang_", languages, languages)
}

// progressKeyboard builds the progress display with a dummy button and cancel.
func progressKeyboard(pct float64, speed, eta string) models.InlineKeyboardMarkup {
	progressText := fmt.Sprintf("%.1f%%", pct)
	if speed != "" {
		progressText += fmt.Sprintf(" | %s", speed)
	}
	if eta != "" {
		progressText += fmt.Sprintf(" | ETA %s", eta)
	}
	return models.InlineKeyboardMarkup{
		InlineKeyboard: [][]models.InlineKeyboardButton{
			{{Text: progressText, CallbackData: "noop"}},
			{{Text: "Cancel", CallbackData: "cancel_dl"}},
		},
	}
}

// deleteConfirmKeyboard builds the confirmation prompt for account deletion.
func deleteConfirmKeyboard(userID int64) models.InlineKeyboardMarkup {
	return models.InlineKeyboardMarkup{
		InlineKeyboard: [][]models.InlineKeyboardButton{
			{
				{Text: "Yes, delete everything", CallbackData: fmt.Sprintf("delaccount_%d", userID), Style: "danger"},
				{Text: "Cancel", CallbackData: "back_settings"},
			},
		},
	}
}