import 'package:core/presentation/extensions/color_extension.dart';
import 'package:core/presentation/resources/image_paths.dart';
import 'package:core/presentation/utils/responsive_utils.dart';
import 'package:core/presentation/views/button/tmail_button_widget.dart';
import 'package:core/presentation/views/html_viewer/html_content_viewer_on_web_widget.dart';
import 'package:core/presentation/views/html_viewer/html_content_viewer_widget.dart';
import 'package:core/presentation/views/html_viewer/html_viewer_controller_for_web.dart';
import 'package:core/utils/app_logger.dart';
import 'package:core/utils/direction_utils.dart';
import 'package:core/utils/platform_info.dart';
import 'package:flutter/material.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:get/get.dart';
import 'package:jmap_dart_client/jmap/mail/calendar/calendar_event.dart';
import 'package:model/email/email_action_type.dart';
import 'package:model/email/presentation_email.dart';
import 'package:model/extensions/list_attachment_extension.dart';
import 'package:model/extensions/list_email_address_extension.dart';
import 'package:model/extensions/presentation_email_extension.dart';
import 'package:model/extensions/presentation_mailbox_extension.dart';
import 'package:model/mailbox/presentation_mailbox.dart';
import 'package:pointer_interceptor/pointer_interceptor.dart';
import 'package:tmail_ui_user/features/base/widget/popup_item_widget.dart';
import 'package:tmail_ui_user/features/email/presentation/controller/single_email_controller.dart';
import 'package:tmail_ui_user/features/email/presentation/extensions/calendar_event_extension.dart';
import 'package:tmail_ui_user/features/email/presentation/styles/email_view_styles.dart';
import 'package:tmail_ui_user/features/email/presentation/widgets/email_view_app_bar_widget.dart';
import 'package:tmail_ui_user/features/email/presentation/widgets/email_view_bottom_bar_widget.dart';
import 'package:tmail_ui_user/features/email/presentation/widgets/calendar_event/calendar_event_action_banner_widget.dart';
import 'package:tmail_ui_user/features/email/presentation/widgets/calendar_event/calendar_event_detail_widget.dart';
import 'package:tmail_ui_user/features/email/presentation/widgets/calendar_event/calendar_event_information_widget.dart';
import 'package:tmail_ui_user/features/email/presentation/widgets/email_action_cupertino_action_sheet_action_builder.dart';
import 'package:tmail_ui_user/features/email/presentation/widgets/email_attachments_widget.dart';
import 'package:tmail_ui_user/features/email/presentation/widgets/email_subject_widget.dart';
import 'package:tmail_ui_user/features/email/presentation/widgets/email_view_empty_widget.dart';
import 'package:tmail_ui_user/features/email/presentation/widgets/email_view_loading_bar_widget.dart';
import 'package:tmail_ui_user/features/email/presentation/widgets/information_sender_and_receiver_builder.dart';
import 'package:tmail_ui_user/features/manage_account/presentation/extensions/vacation_response_extension.dart';
import 'package:tmail_ui_user/features/manage_account/presentation/vacation/widgets/vacation_notification_message_widget.dart';
import 'package:tmail_ui_user/main/localizations/app_localizations.dart';
import 'package:tmail_ui_user/main/utils/app_utils.dart';

class EmailView extends GetWidget<SingleEmailController> {

  final responsiveUtils = Get.find<ResponsiveUtils>();
  final imagePaths = Get.find<ImagePaths>();

  EmailView({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return WillPopScope(
      onWillPop: () => controller.backButtonPressedCallbackAction.call(context),
      child: Scaffold(
        backgroundColor: responsiveUtils.isWebDesktop(context)
          ? AppColor.colorBgDesktop
          : Colors.white,
        appBar: PlatformInfo.isIOS
          ? PreferredSize(
              preferredSize: const Size(double.infinity, 100),
              child: Obx(() {
                if (controller.currentEmail != null) {
                  return SafeArea(
                    top: false,
                    bottom: false,
                    child: EmailViewAppBarWidget(
                      key: const Key('email_view_app_bar_widget'),
                      presentationEmail: controller.currentEmail!,
                      mailboxContain: _getMailboxContain(controller.currentEmail!),
                      isSearchActivated: controller.mailboxDashBoardController.searchController.isSearchEmailRunning,
                      onBackAction: () => controller.closeEmailView(context),
                      onEmailActionClick: (email, action) => controller.handleEmailAction(context, email, action),
                      onMoreActionClick: (email, position) {
                        if (position == null) {
                          controller.openContextMenuAction(
                            context,
                            _emailActionMoreActionTile(context, email)
                          );
                        } else {
                          controller.openPopupMenuAction(
                            context,
                            position,
                            _popupMenuEmailActionTile(context, email)
                          );
                        }
                      },
                    ),
                  );
                } else {
                  return const SizedBox.shrink();
                }
              })
            )
          : null,
        body: SafeArea(
          right: responsiveUtils.isLandscapeMobile(context),
          left: responsiveUtils.isLandscapeMobile(context),
          bottom: !PlatformInfo.isIOS,
          child: Container(
            clipBehavior: Clip.antiAlias,
            decoration: responsiveUtils.isWebDesktop(context)
              ? BoxDecoration(
                  borderRadius: BorderRadius.circular(20),
                  border: Border.all(color: AppColor.colorBorderBodyThread, width: 1),
                  color: Colors.white)
              : const BoxDecoration(color: Colors.white),
            margin: _getMarginEmailView(context),
            child: Obx(() {
              final currentEmail = controller.currentEmail;
              if (currentEmail != null) {
                return Column(children: [
                  if (!PlatformInfo.isIOS)
                    Obx(() => EmailViewAppBarWidget(
                      key: const Key('email_view_app_bar_widget'),
                      presentationEmail: currentEmail,
                      mailboxContain: _getMailboxContain(currentEmail),
                      isSearchActivated: controller.mailboxDashBoardController.searchController.isSearchEmailRunning,
                      onBackAction: () => controller.closeEmailView(context),
                      onEmailActionClick: (email, action) => controller.handleEmailAction(context, email, action),
                      onMoreActionClick: (email, position) {
                        if (position == null) {
                          controller.openContextMenuAction(
                            context,
                            _emailActionMoreActionTile(context, email)
                          );
                        } else {
                          controller.openPopupMenuAction(
                            context,
                            position,
                            _popupMenuEmailActionTile(context, email)
                          );
                        }
                      },
                      optionsWidget: PlatformInfo.isWeb && controller.emailSupervisorController.supportedPageView.isTrue
                        ? _buildNavigatorPageViewWidgets(context)
                        : null,
                    )),
                  Obx(() {
                    final vacation = controller.mailboxDashBoardController.vacationResponse.value;
                    if (vacation?.vacationResponderIsValid == true &&
                        (
                          responsiveUtils.isMobile(context) ||
                          responsiveUtils.isTablet(context) ||
                          responsiveUtils.isLandscapeMobile(context)
                        )
                    ) {
                      return VacationNotificationMessageWidget(
                        margin: const EdgeInsets.only(left: 12, right: 12, bottom: 5),
                        vacationResponse: vacation!,
                        actionGotoVacationSetting: controller.mailboxDashBoardController.goToVacationSetting,
                        actionEndNow: controller.mailboxDashBoardController.disableVacationResponder
                      );
                    } else {
                      return const SizedBox.shrink();
                    }
                  }),
                  Expanded(
                    child: Obx(() {
                      if (controller.emailSupervisorController.supportedPageView.isTrue) {
                        final currentListEmail = controller.emailSupervisorController.currentListEmail;
                        return PageView.builder(
                          physics: controller.emailSupervisorController.scrollPhysicsPageView.value,
                          itemCount: currentListEmail.length,
                          allowImplicitScrolling: true,
                          controller: controller.emailSupervisorController.pageController,
                          onPageChanged: controller.emailSupervisorController.onPageChanged,
                          itemBuilder: (context, index) {
                            final currentEmail = currentListEmail[index];
                            if (PlatformInfo.isMobile) {
                              return SingleChildScrollView(
                                physics : const ClampingScrollPhysics(),
                                child: Container(
                                  width: double.infinity,
                                  alignment: Alignment.center,
                                  color: Colors.white,
                                  child: Obx(() => _buildEmailMessage(
                                    context: context,
                                    presentationEmail: currentEmail,
                                    calendarEvent: controller.calendarEvent.value,
                                  ))
                                )
                              );
                            } else {
                              return Obx(() {
                                final calendarEvent = controller.calendarEvent.value;
                                if (currentEmail.hasCalendarEvent && calendarEvent != null) {
                                  return SingleChildScrollView(
                                    physics : const ClampingScrollPhysics(),
                                    child: Container(
                                      width: double.infinity,
                                      alignment: Alignment.center,
                                      color: Colors.white,
                                      child: _buildEmailMessage(
                                        context: context,
                                        presentationEmail: currentEmail,
                                        calendarEvent: calendarEvent,
                                        emailAddressSender: currentEmail.listEmailAddressSender.getListAddress(),
                                      )
                                    )
                                  );
                                } else {
                                  return _buildEmailMessage(
                                    context: context,
                                    presentationEmail: currentEmail,
                                  );
                                }
                              });
                            }
                          }
                        );
                      } else {
                        if (PlatformInfo.isMobile) {
                          return SingleChildScrollView(
                            physics : const ClampingScrollPhysics(),
                            child: Container(
                              width: double.infinity,
                              alignment: Alignment.center,
                              color: Colors.white,
                              child: Obx(() => _buildEmailMessage(
                                context: context,
                                presentationEmail: currentEmail,
                                calendarEvent: controller.calendarEvent.value,
                              ))
                            )
                          );
                        } else {
                          return Obx(() {
                            final calendarEvent = controller.calendarEvent.value;
                            if (currentEmail.hasCalendarEvent && calendarEvent != null) {
                              return SingleChildScrollView(
                                physics : const ClampingScrollPhysics(),
                                child: Container(
                                  width: double.infinity,
                                  alignment: Alignment.center,
                                  color: Colors.white,
                                  child: _buildEmailMessage(
                                    context: context,
                                    presentationEmail: currentEmail,
                                    calendarEvent: calendarEvent,
                                    emailAddressSender: currentEmail.listEmailAddressSender.getListAddress(),
                                  )
                                )
                              );
                            } else {
                              return _buildEmailMessage(
                                context: context,
                                presentationEmail: currentEmail,
                              );
                            }
                          });
                        }
                      }
                    }),
                  ),
                  EmailViewBottomBarWidget(
                    key: const Key('email_view_button_bar'),
                    presentationEmail: currentEmail,
                    emailActionCallback: controller.pressEmailAction
                  ),
                ]);
              } else {
                return const EmailViewEmptyWidget();
              }
            })
          )
        )
      )
    );
  }

  EdgeInsets _getMarginEmailView(BuildContext context) {
    if (PlatformInfo.isWeb) {
      if (responsiveUtils.isDesktop(context)) {
        return EdgeInsets.only(
          left: AppUtils.isDirectionRTL(context) ? 16 : 0,
          right: AppUtils.isDirectionRTL(context) ? 0 : 16,
          top: 16,
          bottom: 16
        );
      } else {
        return const EdgeInsets.symmetric(vertical: 16);
      }
    } else {
      return EdgeInsets.zero;
    }
  }

  PresentationMailbox? _getMailboxContain(PresentationEmail currentEmail) {
    return currentEmail.findMailboxContain(controller.mailboxDashBoardController.mapMailboxById);
  }
  
  List<Widget> _buildNavigatorPageViewWidgets(BuildContext context) {
    return [
      TMailButtonWidget.fromIcon(
        icon: DirectionUtils.isDirectionRTLByLanguage(context)
          ? imagePaths.icOlder
          : imagePaths.icNewer,
        iconColor: controller.emailSupervisorController.nextEmailActivated
          ? AppColor.primaryColor
          : AppColor.colorAttachmentIcon,
        iconSize: EmailViewStyles.pageViewIconSize,
        backgroundColor: Colors.transparent,
        padding: EmailViewStyles.pageViewButtonPadding,
        tooltipMessage: AppLocalizations.of(context).newer,
        onTapActionCallback: controller.emailSupervisorController.moveToNextEmail
      ),
      TMailButtonWidget.fromIcon(
        icon: DirectionUtils.isDirectionRTLByLanguage(context)
          ? imagePaths.icNewer
          : imagePaths.icOlder,
        iconColor: controller.emailSupervisorController.previousEmailActivated
          ? AppColor.primaryColor
          : AppColor.colorAttachmentIcon,
        iconSize: EmailViewStyles.pageViewIconSize,
        padding: EmailViewStyles.pageViewButtonPadding,
        backgroundColor: Colors.transparent,
        tooltipMessage: AppLocalizations.of(context).older,
        onTapActionCallback: controller.emailSupervisorController.backToPreviousEmail
      ),
    ];
  }

  Widget _buildEmailMessage({
    required BuildContext context,
    required PresentationEmail presentationEmail,
    CalendarEvent? calendarEvent,
    List<String>? emailAddressSender,
  }) {
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        EmailSubjectWidget(presentationEmail: presentationEmail),
        InformationSenderAndReceiverBuilder(
          controller: controller,
          emailSelected: presentationEmail,
          imagePaths: imagePaths,
          responsiveUtils: responsiveUtils,
        ),
        Obx(() {
          final attachments = controller.attachments.listAttachmentsDisplayedOutSide;
          if (attachments.isNotEmpty) {
            return EmailAttachmentsWidget(
              responsiveUtils: responsiveUtils,
              attachments: attachments,
              imagePaths: imagePaths,
              onDragStarted: () {
                log('EmailView::_buildEmailMessage:onDragStarted:');
                controller.mailboxDashBoardController.enableDraggableApp();
              },
              onDragEnd: (details) {
                log('EmailView::_buildEmailMessage:onDragEnd:');
                controller.mailboxDashBoardController.disableDraggableApp();
              },
              downloadAttachmentAction: (attachment) {
                if (PlatformInfo.isWeb) {
                  controller.downloadAttachmentForWeb(context, attachment);
                } else {
                  controller.exportAttachment(context, attachment);
                }
              },
              onTapShowAllAttachmentFile: () => controller.openAttachmentList(context, attachments),
            );
          } else {
            return const SizedBox.shrink();
          }
        }),
        Obx(() => EmailViewLoadingBarWidget(
          viewState: controller.emailLoadedViewState.value
        )),
        if (calendarEvent != null)
          Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            mainAxisSize: MainAxisSize.min,
            children: [
              CalendarEventInformationWidget(
                calendarEvent: calendarEvent,
                eventActions: controller.eventActions,
                onOpenComposerAction: controller.openNewComposerAction,
                onOpenNewTabAction: controller.openNewTabAction,
              ),
              if (calendarEvent.getTitleEventAction(context, emailAddressSender ?? []).isNotEmpty)
                CalendarEventActionBannerWidget(
                  calendarEvent: calendarEvent,
                  listEmailAddressSender: emailAddressSender ?? []
                ),
              CalendarEventDetailWidget(
                calendarEvent: calendarEvent,
                eventActions: controller.eventActions,
                onOpenComposerAction: controller.openNewComposerAction,
                onOpenNewTabAction: controller.openNewTabAction,
              ),
            ],
          )
        else if (presentationEmail.id == controller.currentEmail?.id)
          Obx(() {
            if (controller.emailContents.value != null) {
              final allEmailContents = controller.emailContents.value ?? '';

              if (PlatformInfo.isWeb) {
                return Expanded(
                  child: Padding(
                    padding: const EdgeInsetsDirectional.only(start: 16, bottom: 16),
                    child: LayoutBuilder(builder: (context, constraints) {
                      return Obx(() {
                        return Stack(
                          children: [
                            HtmlContentViewerOnWeb(
                              widthContent: constraints.maxWidth,
                              heightContent: constraints.maxHeight,
                              contentHtml: allEmailContents,
                              controller: HtmlViewerControllerForWeb(),
                              mailtoDelegate: controller.openMailToLink,
                              direction: AppUtils.getCurrentDirection(context),
                            ),
                            if (controller.mailboxDashBoardController.isDraggableAppActive)
                              PointerInterceptor(
                                child: SizedBox(
                                  width: constraints.maxWidth,
                                  height: constraints.maxHeight,
                                )
                              )
                          ],
                        );
                      });
                    }),
                  ),
                );
              } else {
                return Padding(
                  padding: const EdgeInsetsDirectional.symmetric(
                    vertical: EmailViewStyles.mobileContentVerticalMargin,
                    horizontal: EmailViewStyles.mobileContentHorizontalMargin
                  ),
                  child: LayoutBuilder(builder: (context, constraints) {
                    return HtmlContentViewer(
                      contentHtml: allEmailContents,
                      initialWidth: constraints.maxWidth,
                      direction: AppUtils.getCurrentDirection(context),
                      onMailtoDelegateAction: controller.openMailToLink,
                      onScrollHorizontalEnd: controller.toggleScrollPhysicsPagerView,
                      onLoadWidthHtmlViewer: controller.emailSupervisorController.updateScrollPhysicPageView,
                    );
                  })
                );
              }
            } else {
              return const SizedBox.shrink();
            }
          })
      ],
    );
  }

  List<Widget> _emailActionMoreActionTile(BuildContext context, PresentationEmail email) {
    return <Widget>[
      _markAsEmailUnreadAction(context, email),
      _markAsEmailSpamOrUnSpamAction(context, email),
      _quickCreatingRuleAction(context, email),
    ];
  }

  Widget _markAsEmailUnreadAction(BuildContext context, PresentationEmail email) {
    return (EmailActionCupertinoActionSheetActionBuilder(
          const Key('mark_as_unread_action'),
          SvgPicture.asset(
            imagePaths.icUnreadEmail,
            width: 24,
            height: 24,
            fit: BoxFit.fill,
            colorFilter: AppColor.colorTextButton.asFilter()
          ),
          AppLocalizations.of(context).mark_as_unread,
          email,
          iconLeftPadding: responsiveUtils.isMobile(context)
            ? EdgeInsets.only(
                left: AppUtils.isDirectionRTL(context) ? 16 : 12,
                right: AppUtils.isDirectionRTL(context) ? 12 : 16,
              )
            : EdgeInsets.only(
                left: AppUtils.isDirectionRTL(context) ? 12 : 0,
                right: AppUtils.isDirectionRTL(context) ? 0 : 12,
              ),
          iconRightPadding: responsiveUtils.isMobile(context)
            ? EdgeInsets.only(
                left: AppUtils.isDirectionRTL(context) ? 12 : 0,
                right: AppUtils.isDirectionRTL(context) ? 0 : 12,
              )
            : EdgeInsets.zero)
      ..onActionClick((email) => controller.handleEmailAction(
        context,
        email,
        EmailActionType.markAsUnread)
      )
    ).build();
  }

  Widget _markAsEmailSpamOrUnSpamAction(BuildContext context, PresentationEmail email) {
    final currentMailbox = controller.getMailboxContain(email);

    return (EmailActionCupertinoActionSheetActionBuilder(
          const Key('mark_as_spam_or_un_spam_action'),
          SvgPicture.asset(
            currentMailbox?.isSpam == true ? imagePaths.icNotSpam : imagePaths.icSpam,
            width: 24,
            height: 24,
            fit: BoxFit.fill,
            colorFilter: AppColor.colorTextButton.asFilter()
          ),
          currentMailbox?.isSpam == true
            ? AppLocalizations.of(context).remove_from_spam
            : AppLocalizations.of(context).mark_as_spam,
          email,
          iconLeftPadding: responsiveUtils.isMobile(context)
            ? EdgeInsets.only(
                left: AppUtils.isDirectionRTL(context) ? 16 : 12,
                right: AppUtils.isDirectionRTL(context) ? 12 : 16,
              )
            : EdgeInsets.only(
                left: AppUtils.isDirectionRTL(context) ? 12 : 0,
                right: AppUtils.isDirectionRTL(context) ? 0 : 12,
              ),
          iconRightPadding: responsiveUtils.isMobile(context)
            ? EdgeInsets.only(
                left: AppUtils.isDirectionRTL(context) ? 12 : 0,
                right: AppUtils.isDirectionRTL(context) ? 0 : 12,
              )
            : EdgeInsets.zero)
      ..onActionClick((email) => controller.handleEmailAction(
        context,
        email,
        currentMailbox?.isSpam == true ? EmailActionType.unSpam : EmailActionType.moveToSpam)
      )
    ).build();
  }

  Widget _quickCreatingRuleAction(BuildContext context, PresentationEmail email) {
    return (EmailActionCupertinoActionSheetActionBuilder(
          const Key('quick_creating_rule_action'),
          SvgPicture.asset(
            imagePaths.icQuickCreatingRule,
            width: 24,
            height: 24,
            fit: BoxFit.fill,
            colorFilter: AppColor.colorTextButton.asFilter()),
          AppLocalizations.of(context).quickCreatingRule,
          email,
          iconLeftPadding: responsiveUtils.isMobile(context)
            ? EdgeInsets.only(
                left: AppUtils.isDirectionRTL(context) ? 16 : 12,
                right: AppUtils.isDirectionRTL(context) ? 12 : 16,
              )
            : EdgeInsets.only(
                left: AppUtils.isDirectionRTL(context) ? 12 : 0,
                right: AppUtils.isDirectionRTL(context) ? 0 : 12,
              ),
          iconRightPadding: responsiveUtils.isMobile(context)
            ? EdgeInsets.only(
                left: AppUtils.isDirectionRTL(context) ? 12 : 0,
                right: AppUtils.isDirectionRTL(context) ? 0 : 12,
              )
            : EdgeInsets.zero)
        ..onActionClick((email) => controller.quickCreatingRule(context, email.from!.first)))
      .build();
  }

  List<PopupMenuEntry> _popupMenuEmailActionTile(BuildContext context, PresentationEmail email) {
    final mailboxContain = controller.getMailboxContain(email);
    return [
      _markAsEmailUnreadPopupItemAction(context, email),
      _markAsEmailSpamOrUnSpamPopupItemAction(context, email, mailboxContain),
      _quickCreatingRulePopupItemAction(context, email)
    ];
  }

  PopupMenuEntry _markAsEmailUnreadPopupItemAction(BuildContext context, PresentationEmail email) {
    return PopupMenuItem(
      padding: EdgeInsets.zero,
      child: PopupItemWidget(
        imagePaths.icUnreadEmail,
        AppLocalizations.of(context).mark_as_unread,
        colorIcon: AppColor.colorTextButton,
        padding: const EdgeInsetsDirectional.only(start: 12),
        styleName: const TextStyle(
          fontWeight: FontWeight.w500,
          fontSize: 16,
          color: Colors.black
        ),
        onCallbackAction: () => controller.handleEmailAction(
          context,
          email,
          EmailActionType.markAsUnread
        )
      )
    );
  }

  PopupMenuEntry _markAsEmailSpamOrUnSpamPopupItemAction(
    BuildContext context,
    PresentationEmail email,
    PresentationMailbox? mailboxContain
  ) {
    return PopupMenuItem(
      padding: EdgeInsets.zero,
      child: PopupItemWidget(
        mailboxContain?.isSpam == true ? imagePaths.icNotSpam : imagePaths.icSpam,
        mailboxContain?.isSpam == true
          ? AppLocalizations.of(context).remove_from_spam
          : AppLocalizations.of(context).mark_as_spam,
        colorIcon: AppColor.colorTextButton,
        padding: const EdgeInsetsDirectional.only(start: 12),
        styleName: const TextStyle(
          fontWeight: FontWeight.w500,
          fontSize: 16,
          color: Colors.black
        ),
        onCallbackAction: () => controller.handleEmailAction(
          context,
          email,
          mailboxContain?.isSpam == true ? EmailActionType.unSpam : EmailActionType.moveToSpam
        )
      )
    );
  }

  PopupMenuEntry _quickCreatingRulePopupItemAction(BuildContext context, PresentationEmail email) {
    return PopupMenuItem(
      padding: EdgeInsets.zero,
      child: PopupItemWidget(
        imagePaths.icQuickCreatingRule,
        AppLocalizations.of(context).quickCreatingRule,
        colorIcon: AppColor.colorTextButton,
        padding: const EdgeInsetsDirectional.only(start: 12),
        styleName: const TextStyle(
          fontWeight: FontWeight.w500,
          fontSize: 16,
          color: Colors.black
        ),
        onCallbackAction: () => controller.quickCreatingRule(context, email.from!.first)
      )
    );
  }
}