using System;
using System.Collections.Generic;
using System.Runtime.CompilerServices;
using Unity.UIWidgets.foundation;

namespace UIWidgetsSample
{
    public abstract class ChatL10n
    {
        /// Accessibility label (hint) for the attachment button
        public readonly string attachmentButtonAccessibilityLabel;

        /// Placeholder when there are no messages
        public readonly string emptyChatPlaceholder;

        /// Accessibility label (hint) for the tap action on file message
        public readonly string fileButtonAccessibilityLabel;

        /// Placeholder for the text field
        public readonly string inputPlaceholder;

        /// Accessibility label (hint) for the send button
        public readonly string sendButtonAccessibilityLabel;

        /// Creates a new chat l10n based on provided copy
        public ChatL10n(
            string attachmentButtonAccessibilityLabel = null,
            string emptyChatPlaceholder = null,
            string fileButtonAccessibilityLabel = null,
            string inputPlaceholder = null,
            string sendButtonAccessibilityLabel = null
        )
        {
            this.inputPlaceholder = inputPlaceholder;
            this.attachmentButtonAccessibilityLabel = attachmentButtonAccessibilityLabel;
            this.emptyChatPlaceholder = emptyChatPlaceholder;
            this.fileButtonAccessibilityLabel = fileButtonAccessibilityLabel;
            this.sendButtonAccessibilityLabel = sendButtonAccessibilityLabel;
        }
    }

    /// English l10n which extends [ChatL10n]
    public class ChatL10nEn : ChatL10n
    {
        /// Creates English l10n. Use this constructor if you want to
        /// override only a couple of variables, otherwise create a new class
        /// which extends [ChatL10n]
        public ChatL10nEn(
            string attachmentButtonAccessibilityLabel = "Send media",
            string emptyChatPlaceholder = "No messages here yet",
            string fileButtonAccessibilityLabel = "File",
            string inputPlaceholder = "Message",
            string sendButtonAccessibilityLabel = "Send"
        ) : base(
            attachmentButtonAccessibilityLabel,
            emptyChatPlaceholder,
            fileButtonAccessibilityLabel,
            inputPlaceholder,
            sendButtonAccessibilityLabel
        )
        {
        }
    }
}