import 'package:PiliPalaX/http/loading_state.dart';
import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:PiliPalaX/common/skeleton/video_card_h.dart';
import 'package:PiliPalaX/common/widgets/http_error.dart';
import 'package:PiliPalaX/common/widgets/video_card_h.dart';
import 'package:PiliPalaX/pages/later/index.dart';

import '../../common/constants.dart';
import '../../utils/grid.dart';

class LaterPage extends StatefulWidget {
  const LaterPage({super.key});

  @override
  State<LaterPage> createState() => _LaterPageState();
}

class _LaterPageState extends State<LaterPage> {
  final LaterController _laterController = Get.put(LaterController());

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Obx(
          () => Text(
            '稍后再看${_laterController.count.value == -1 ? '' : ' (${_laterController.count.value})'}',
          ),
        ),
        actions: [
          Obx(
            () => _laterController.count.value != -1
                ? TextButton(
                    onPressed: () => _laterController.toViewDel(context),
                    child: const Text('移除已看'),
                  )
                : const SizedBox(),
          ),
          Obx(
            () => _laterController.count.value != -1
                ? IconButton(
                    tooltip: '一键清空',
                    onPressed: () => _laterController.toViewClear(context),
                    icon: Icon(
                      Icons.clear_all_outlined,
                      size: 21,
                      color: Theme.of(context).colorScheme.primary,
                    ),
                  )
                : const SizedBox(),
          ),
          const SizedBox(width: 8),
        ],
      ),
      body: CustomScrollView(
        physics: const AlwaysScrollableScrollPhysics(),
        controller: _laterController.scrollController,
        slivers: [
          SliverPadding(
            padding: EdgeInsets.only(
              left: StyleString.safeSpace,
              right: StyleString.safeSpace,
              bottom: MediaQuery.of(context).padding.bottom + 10,
            ),
            sliver: Obx(
              () => _buildBody(_laterController.loadingState.value),
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildBody(LoadingState loadingState) {
    return switch (loadingState) {
      Loading() => SliverGrid(
          gridDelegate: SliverGridDelegateWithExtentAndRatio(
            mainAxisSpacing: StyleString.safeSpace,
            crossAxisSpacing: StyleString.safeSpace,
            maxCrossAxisExtent: Grid.maxRowWidth * 2,
            childAspectRatio: StyleString.aspectRatio * 2.4,
            mainAxisExtent: 0,
          ),
          delegate: SliverChildBuilderDelegate(
            (context, index) {
              return const VideoCardHSkeleton();
            },
            childCount: 10,
          ),
        ),
      Success() => (loadingState.response as List?)?.isNotEmpty == true
          ? SliverGrid(
              gridDelegate: SliverGridDelegateWithExtentAndRatio(
                mainAxisSpacing: StyleString.safeSpace,
                crossAxisSpacing: StyleString.safeSpace,
                maxCrossAxisExtent: Grid.maxRowWidth * 2,
                childAspectRatio: StyleString.aspectRatio * 2.4,
                mainAxisExtent: 0,
              ),
              delegate: SliverChildBuilderDelegate(
                (context, index) {
                  var videoItem = loadingState.response[index];
                  return VideoCardH(
                      videoItem: videoItem,
                      source: 'later',
                      longPress: () => _laterController.toViewDel(context,
                          aid: videoItem.aid));
                },
                childCount: loadingState.response.length,
              ),
            )
          : HttpError(
              callback: _laterController.onReload,
            ),
      Error() => HttpError(
          errMsg: loadingState.errMsg,
          callback: _laterController.onReload,
        ),
      LoadingState() => throw UnimplementedError(),
    };
  }
}