import 'package:flutter/material.dart';
import 'package:lunasea/core.dart';

abstract class LSDialog {
    static const HEADER_SIZE = Constants.UI_FONT_SIZE_HEADER;
    static const BODY_SIZE = Constants.UI_FONT_SIZE_SUBTITLE;
    static const SUBBODY_SIZE = Constants.UI_FONT_SIZE_SUBHEADER;
    static const BUTTON_SIZE = Constants.UI_FONT_SIZE_SUBHEADER;

    static Widget title({ @required String text }) => Text(
        text,
        textAlign: TextAlign.center,
        style: TextStyle(
            fontSize: LSDialog.HEADER_SIZE,
            fontWeight: FontWeight.bold,
        ),
    );

    static TextSpan bolded({ @required String text, double fontSize = LSDialog.BODY_SIZE, Color color }) => TextSpan(
        text: text,
        style: TextStyle(
            color: color == null
                ? LunaColours.accent
                : color,
            fontWeight: FontWeight.w600,
            fontSize: fontSize,
        ),
    );

    static Widget richText({ @required List<TextSpan> children, TextAlign alignment = TextAlign.start }) => RichText(
        text: TextSpan(
            style: TextStyle(
                fontSize: LSDialog.BODY_SIZE,
            ),
            children: children,
        ),
        textAlign: alignment,
    );

    static Widget button({ @required String text, @required void Function() onPressed, Color textColor }) => FlatButton(
        child: Text(
            text,
            style: TextStyle(
                color: textColor == null
                    ? LunaColours.accent
                    : textColor,
                fontSize: LSDialog.BUTTON_SIZE,
            ),
        ),
        onPressed: onPressed,
    );

    static Widget cancel(BuildContext context, { Color textColor = Colors.white }) => FlatButton(
        child: Text(
            'Cancel',
            style: TextStyle(
                color: textColor,
                fontSize: LSDialog.BUTTON_SIZE,
            ),
        ),
        onPressed: () => Navigator.of(context).pop(),
    );

    static Widget content({ @required List<Widget> children }) => SingleChildScrollView(
        child: ListBody(
            children: children,
        ),
        padding: EdgeInsets.fromLTRB(0.0, 0.0, 0.0, 1.0),
    );

    static Widget textContent({ @required String text, TextAlign textAlign = TextAlign.center }) => Text(
        text,
        style: TextStyle(
            color: Colors.white,
            fontSize: LSDialog.BODY_SIZE,
        ),
        textAlign: textAlign,
    );

    static TextSpan textSpanContent({ @required String text }) => TextSpan(
        text: text,
        style: TextStyle(
            color: Colors.white,
            fontSize: LSDialog.BODY_SIZE,
        ),
    );

    static Widget textInput({
        @required TextEditingController controller,
        @required Function(String) onSubmitted,
        @required String title,
     }) => TextField(
        autofocus: true,
        autocorrect: false,
        controller: controller,
        decoration: InputDecoration(
            labelText: title,
            labelStyle: TextStyle(
                color: Colors.white54,
                decoration: TextDecoration.none,
                fontSize: LSDialog.BODY_SIZE,
            ),
            focusedBorder: UnderlineInputBorder(
                borderSide: BorderSide(color: LunaColours.accent),
            ),
            enabledBorder: UnderlineInputBorder(
                borderSide: BorderSide(color: LunaColours.accent.withOpacity(0.3)),
            ),
        ),
        style: TextStyle(
            color: Colors.white,
            fontSize: LSDialog.BODY_SIZE,
        ),
        cursorColor: LunaColours.accent,
        textInputAction: TextInputAction.done,
        onSubmitted: onSubmitted,
    );

    static Widget textFormInput({
        @required TextEditingController controller,
        @required String title,
        @required Function(String) onSubmitted,
        @required Function(String) validator,
        bool obscureText = false,
        TextInputType keyboardType = TextInputType.text,
     }) => TextFormField(
        autofocus: true,
        autocorrect: false,
        controller: controller,
        obscureText: obscureText,
        keyboardType: keyboardType,
        decoration: InputDecoration(
            labelText: title,
            labelStyle: TextStyle(
                color: Colors.white54,
                decoration: TextDecoration.none,
                fontSize: LSDialog.BODY_SIZE,
            ),
            focusedBorder: UnderlineInputBorder(
                borderSide: BorderSide(color: LunaColours.accent),
            ),
            enabledBorder: UnderlineInputBorder(
                borderSide: BorderSide(color: LunaColours.accent.withOpacity(0.3)),
            ),
        ),
        style: TextStyle(
            color: Colors.white,
            fontSize: LSDialog.BODY_SIZE,
        ),
        cursorColor: LunaColours.accent,
        textInputAction: TextInputAction.done,
        validator: validator,
        onFieldSubmitted: onSubmitted,
    );

    static Widget tile({
        @required IconData icon,
        Color iconColor,
        @required String text,
        RichText subtitle,
        @required Function onTap,
    }) => ListTile(
        leading: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
                LSIcon(
                    icon: icon ?? Icons.error_outline,
                    color: iconColor ?? LunaColours.accent,
                ),
            ],
        ),
        title: Text(
            text,
            style: TextStyle(
                fontSize: LSDialog.BODY_SIZE,
                color: Colors.white,
            ),
        ),
        subtitle: text == null
            ? null
            : subtitle,
        onTap: onTap,
        contentPadding: tileContentPadding(),
    );

    static EdgeInsets tileContentPadding() => EdgeInsets.fromLTRB(32.0, 0.0, 16.0, 0.0);
    static EdgeInsets textDialogContentPadding() => EdgeInsets.fromLTRB(24.0, 32.0, 24.0, 14.0);
    static EdgeInsets listDialogContentPadding() => EdgeInsets.fromLTRB(0.0, 26.0, 24.0, 0.0);
    static EdgeInsets inputTextDialogContentPadding() => EdgeInsets.fromLTRB(24.0, 34.0, 24.0, 22.0);
    static EdgeInsets inputDialogContentPadding() => EdgeInsets.fromLTRB(24.0, 24.0, 24.0, 22.0);

    static Future<void> dialog({
        @required BuildContext context,
        @required String title,
        @required List<Widget> content,
        @required EdgeInsets contentPadding,
        List<Widget> buttons,
    }) async {
        await showDialog(
            context: context,
            builder: (context) => AlertDialog(
                actions: <Widget>[
                    LSDialog.cancel(
                        context,
                        textColor: buttons != null ? Colors.white : LunaColours.accent,
                    ),
                    if(buttons != null) ...buttons,
                ],
                title: LSDialog.title(text: title),
                content: LSDialog.content(children: content),
                contentPadding: contentPadding,
                shape: LunaSeaDatabaseValue.THEME_AMOLED.data && LunaSeaDatabaseValue.THEME_AMOLED_BORDER.data
                    ? LSRoundedShapeWithBorder()
                    : LSRoundedShape(),
            ),
        );
    }
}