app/lib/ui/home/downloads/downloads_ui.dart

import 'package:file_sizes/file_sizes.dart';
import 'package:intl/intl.dart';
import 'package:starcitizen_doctor/base/ui.dart';
import 'package:starcitizen_doctor/base/ui_model.dart';

import 'downloads_ui_model.dart';

class DownloadsUI extends BaseUI<DownloadsUIModel> {
  final DateFormat formatter = DateFormat('yyyy-MM-dd HH:mm:ss');

  @override
  Widget? buildBody(BuildContext context, DownloadsUIModel model) {
    return makeDefaultPage(context, model,
        content: Column(
          children: [
            const SizedBox(height: 12),
            Expanded(
                child: ListView.builder(
              itemBuilder: (BuildContext context, int index) {
                final (task, type, isFirstType) = model.getTaskAndType(index);
                final nt = model.getTaskTypeAndName(task);
                return Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    if (isFirstType)
                      Column(
                        children: [
                          Container(
                            padding: const EdgeInsets.only(
                                left: 24, right: 24, top: 12, bottom: 12),
                            margin: const EdgeInsets.only(top: 6, bottom: 6),
                            child: Row(
                              children: [
                                Expanded(
                                    child: Text(
                                  "${model.listHeaderStatusMap[type]}",
                                  style: const TextStyle(
                                      fontSize: 24,
                                      fontWeight: FontWeight.bold),
                                )),
                              ],
                            ),
                          ),
                        ],
                      ),
                    Container(
                      padding: const EdgeInsets.only(
                          left: 12, right: 12, top: 12, bottom: 12),
                      margin: const EdgeInsets.only(
                          left: 12, right: 12, top: 6, bottom: 6),
                      decoration: BoxDecoration(
                        color:
                            FluentTheme.of(context).cardColor.withOpacity(.03),
                        borderRadius: BorderRadius.circular(7),
                      ),
                      child: Row(
                        children: [
                          Column(
                            crossAxisAlignment: CrossAxisAlignment.start,
                            children: [
                              Text(
                                nt.value,
                                style: const TextStyle(
                                    fontSize: 18, fontWeight: FontWeight.bold),
                              ),
                              const SizedBox(height: 6),
                              Row(
                                children: [
                                  Text(
                                    "总大小：${FileSize.getSize(task.totalLength ?? 0)}",
                                    style: const TextStyle(fontSize: 14),
                                  ),
                                  const SizedBox(width: 12),
                                  if (nt.key == "torrent" &&
                                      task.verifiedLength != null &&
                                      task.verifiedLength != 0)
                                    Text(
                                      "校验中...（${FileSize.getSize(task.verifiedLength)}）",
                                      style: const TextStyle(fontSize: 14),
                                    )
                                  else if (task.status == "active")
                                    Text(
                                        "下载中... (${((task.completedLength ?? 0) / (task.totalLength ?? 1)).toStringAsFixed(4)}%)")
                                  else
                                    Text(
                                      "状态：${model.statusMap[task.status]}",
                                      style: const TextStyle(fontSize: 14),
                                    ),
                                  const SizedBox(width: 24),
                                  if (task.status == "active" &&
                                      task.verifiedLength == null)
                                    Text(
                                        "ETA:  ${formatter.format(DateTime.now().add(Duration(seconds: model.getETA(task))))}"),
                                ],
                              ),
                            ],
                          ),
                          const Spacer(),
                          Column(
                            crossAxisAlignment: CrossAxisAlignment.start,
                            children: [
                              Text(
                                  "已上传：${FileSize.getSize(task.uploadLength)}"),
                              Text(
                                  "已下载：${FileSize.getSize(task.completedLength)}"),
                            ],
                          ),
                          const SizedBox(width: 18),
                          Column(
                            crossAxisAlignment: CrossAxisAlignment.start,
                            children: [
                              Text("↑：${FileSize.getSize(task.uploadSpeed)}/s"),
                              Text(
                                  "↓：${FileSize.getSize(task.downloadSpeed)}/s"),
                            ],
                          ),
                          const SizedBox(width: 32),
                          if (type != "stopped")
                            DropDownButton(
                              closeAfterClick: false,
                              title: const Padding(
                                padding: EdgeInsets.all(3),
                                child: Text('选项'),
                              ),
                              items: [
                                if (task.status == "paused")
                                  MenuFlyoutItem(
                                      leading: const Icon(FluentIcons.download),
                                      text: const Text('继续下载'),
                                      onPressed: () =>
                                          model.resumeTask(task.gid))
                                else if (task.status == "active")
                                  MenuFlyoutItem(
                                      leading: const Icon(FluentIcons.pause),
                                      text: const Text('暂停下载'),
                                      onPressed: () =>
                                          model.pauseTask(task.gid)),
                                const MenuFlyoutSeparator(),
                                MenuFlyoutItem(
                                    leading: const Icon(
                                      FluentIcons.chrome_close,
                                      size: 14,
                                    ),
                                    text: const Text('取消下载'),
                                    onPressed: () =>
                                        model.cancelTask(task.gid)),
                                MenuFlyoutItem(
                                    leading: const Icon(
                                      FluentIcons.folder_open,
                                      size: 14,
                                    ),
                                    text: const Text('打开文件夹'),
                                    onPressed: () =>
                                        model.openFolder(task)),
                              ],
                            ),
                          const SizedBox(width: 12),
                        ],
                      ),
                    ),
                  ],
                );
              },
              itemCount: model.getTasksLen(),
            ))
          ],
        ));
  }

  @override
  String getUITitle(BuildContext context, DownloadsUIModel model) => "下载管理";
}