import $ from 'jquery';
import {
  initRepoIssueBranchSelect, initRepoIssueCodeCommentCancel, initRepoIssueCommentDelete,
  initRepoIssueComments, initRepoIssueDependencyDelete, initRepoIssueReferenceIssue,
  initRepoIssueTitleEdit, initRepoIssueWipToggle,
  initRepoPullRequestUpdate, updateIssuesMeta, initIssueTemplateCommentEditors, initSingleCommentEditor,
} from './repo-issue.ts';
import {initUnicodeEscapeButton} from './repo-unicode-escape.ts';
import {svg} from '../svg.ts';
import {htmlEscape} from 'escape-goat';
import {initRepoBranchTagSelector} from '../components/RepoBranchTagSelector.vue';
import {
  initRepoCloneLink, initRepoCommonBranchOrTagDropdown, initRepoCommonFilterSearchDropdown,
} from './repo-common.ts';
import {initCitationFileCopyContent} from './citation.ts';
import {initCompLabelEdit} from './comp/LabelEdit.ts';
import {initRepoDiffConversationNav} from './repo-diff.ts';
import {initCompReactionSelector} from './comp/ReactionSelector.ts';
import {initRepoSettingBranches} from './repo-settings.ts';
import {initRepoPullRequestMergeForm} from './repo-issue-pr-form.ts';
import {initRepoPullRequestCommitStatus} from './repo-issue-pr-status.ts';
import {hideElem, queryElemChildren, showElem} from '../utils/dom.ts';
import {POST} from '../modules/fetch.ts';
import {initRepoIssueCommentEdit} from './repo-issue-edit.ts';

// if there are draft comments, confirm before reloading, to avoid losing comments
function reloadConfirmDraftComment() {
  const commentTextareas = [
    document.querySelector('.edit-content-zone:not(.tw-hidden) textarea'),
    document.querySelector('#comment-form textarea'),
  ];
  for (const textarea of commentTextareas) {
    // Most users won't feel too sad if they lose a comment with 10 chars, they can re-type these in seconds.
    // But if they have typed more (like 50) chars and the comment is lost, they will be very unhappy.
    if (textarea && textarea.value.trim().length > 10) {
      textarea.parentElement.scrollIntoView();
      if (!window.confirm('Page will be reloaded, but there are draft comments. Continuing to reload will discard the comments. Continue?')) {
        return;
      }
      break;
    }
  }
  window.location.reload();
}

export function initBranchSelectorTabs() {
  const elSelectBranch = document.querySelector('.ui.dropdown.select-branch');
  if (!elSelectBranch) return;

  $(elSelectBranch).find('.reference.column').on('click', function () {
    hideElem($(elSelectBranch).find('.scrolling.reference-list-menu'));
    showElem(this.getAttribute('data-target'));
    queryElemChildren(this.parentNode, '.branch-tag-item', (el) => el.classList.remove('active'));
    this.classList.add('active');
    return false;
  });
}

export function initRepoCommentForm() {
  const $commentForm = $('.comment.form');
  if (!$commentForm.length) return;

  if ($commentForm.find('.field.combo-editor-dropzone').length) {
    // at the moment, if a form has multiple combo-markdown-editors, it must be an issue template form
    initIssueTemplateCommentEditors($commentForm);
  } else if ($commentForm.find('.combo-markdown-editor').length) {
    // it's quite unclear about the "comment form" elements, sometimes it's for issue comment, sometimes it's for file editor/uploader message
    initSingleCommentEditor($commentForm);
  }

  function initBranchSelector() {
    const elSelectBranch = document.querySelector('.ui.dropdown.select-branch');
    if (!elSelectBranch) return;

    const urlUpdateIssueRef = elSelectBranch.getAttribute('data-url-update-issueref');
    const $selectBranch = $(elSelectBranch);
    const $branchMenu = $selectBranch.find('.reference-list-menu');
    $branchMenu.find('.item:not(.no-select)').on('click', async function (e) {
      e.preventDefault();
      const selectedValue = this.getAttribute('data-id'); // eg: "refs/heads/my-branch"
      const selectedText = this.getAttribute('data-name'); // eg: "my-branch"
      if (urlUpdateIssueRef) {
        // for existing issue, send request to update issue ref, and reload page
        try {
          await POST(urlUpdateIssueRef, {data: new URLSearchParams({ref: selectedValue})});
          window.location.reload();
        } catch (error) {
          console.error(error);
        }
      } else {
        // for new issue, only update UI&form, do not send request/reload
        const selectedHiddenSelector = this.getAttribute('data-id-selector');
        document.querySelector(selectedHiddenSelector).value = selectedValue;
        elSelectBranch.querySelector('.text-branch-name').textContent = selectedText;
      }
    });
  }

  initBranchSelector();

  // List submits
  function initListSubmits(selector, outerSelector) {
    const $list = $(`.ui.${outerSelector}.list`);
    const $noSelect = $list.find('.no-select');
    const $listMenu = $(`.${selector} .menu`);
    let hasUpdateAction = $listMenu.data('action') === 'update';
    const items = {};

    $(`.${selector}`).dropdown({
      'action': 'nothing', // do not hide the menu if user presses Enter
      fullTextSearch: 'exact',
      async onHide() {
        hasUpdateAction = $listMenu.data('action') === 'update'; // Update the var
        if (hasUpdateAction) {
          // TODO: Add batch functionality and make this 1 network request.
          const itemEntries = Object.entries(items);
          for (const [elementId, item] of itemEntries) {
            await updateIssuesMeta(
              item['update-url'],
              item.action,
              item['issue-id'],
              elementId,
            );
          }
          if (itemEntries.length) {
            reloadConfirmDraftComment();
          }
        }
      },
    });

    $listMenu.find('.item:not(.no-select)').on('click', function (e) {
      e.preventDefault();
      if (this.classList.contains('ban-change')) {
        return false;
      }

      hasUpdateAction = $listMenu.data('action') === 'update'; // Update the var

      const clickedItem = this; // eslint-disable-line unicorn/no-this-assignment
      const scope = this.getAttribute('data-scope');

      $(this).parent().find('.item').each(function () {
        if (scope) {
          // Enable only clicked item for scoped labels
          if (this.getAttribute('data-scope') !== scope) {
            return true;
          }
          if (this !== clickedItem && !this.classList.contains('checked')) {
            return true;
          }
        } else if (this !== clickedItem) {
          // Toggle for other labels
          return true;
        }

        if (this.classList.contains('checked')) {
          $(this).removeClass('checked');
          $(this).find('.octicon-check').addClass('tw-invisible');
          if (hasUpdateAction) {
            if (!($(this).data('id') in items)) {
              items[$(this).data('id')] = {
                'update-url': $listMenu.data('update-url'),
                action: 'detach',
                'issue-id': $listMenu.data('issue-id'),
              };
            } else {
              delete items[$(this).data('id')];
            }
          }
        } else {
          $(this).addClass('checked');
          $(this).find('.octicon-check').removeClass('tw-invisible');
          if (hasUpdateAction) {
            if (!($(this).data('id') in items)) {
              items[$(this).data('id')] = {
                'update-url': $listMenu.data('update-url'),
                action: 'attach',
                'issue-id': $listMenu.data('issue-id'),
              };
            } else {
              delete items[$(this).data('id')];
            }
          }
        }
      });

      // TODO: Which thing should be done for choosing review requests
      // to make chosen items be shown on time here?
      if (selector === 'select-reviewers-modify' || selector === 'select-assignees-modify') {
        return false;
      }

      const listIds = [];
      $(this).parent().find('.item').each(function () {
        if (this.classList.contains('checked')) {
          listIds.push($(this).data('id'));
          $($(this).data('id-selector')).removeClass('tw-hidden');
        } else {
          $($(this).data('id-selector')).addClass('tw-hidden');
        }
      });
      if (!listIds.length) {
        $noSelect.removeClass('tw-hidden');
      } else {
        $noSelect.addClass('tw-hidden');
      }
      $($(this).parent().data('id')).val(listIds.join(','));
      return false;
    });
    $listMenu.find('.no-select.item').on('click', function (e) {
      e.preventDefault();
      if (hasUpdateAction) {
        (async () => {
          await updateIssuesMeta(
            $listMenu.data('update-url'),
            'clear',
            $listMenu.data('issue-id'),
            '',
          );
          reloadConfirmDraftComment();
        })();
      }

      $(this).parent().find('.item').each(function () {
        $(this).removeClass('checked');
        $(this).find('.octicon-check').addClass('tw-invisible');
      });

      if (selector === 'select-reviewers-modify' || selector === 'select-assignees-modify') {
        return false;
      }

      $list.find('.item').each(function () {
        $(this).addClass('tw-hidden');
      });
      $noSelect.removeClass('tw-hidden');
      $($(this).parent().data('id')).val('');
    });
  }

  // Init labels and assignees
  initListSubmits('select-label', 'labels');
  initListSubmits('select-assignees', 'assignees');
  initListSubmits('select-assignees-modify', 'assignees');
  initListSubmits('select-reviewers-modify', 'assignees');

  function selectItem(select_id, input_id) {
    const $menu = $(`${select_id} .menu`);
    const $list = $(`.ui${select_id}.list`);
    const hasUpdateAction = $menu.data('action') === 'update';

    $menu.find('.item:not(.no-select)').on('click', function () {
      $(this).parent().find('.item').each(function () {
        $(this).removeClass('selected active');
      });

      $(this).addClass('selected active');
      if (hasUpdateAction) {
        (async () => {
          await updateIssuesMeta(
            $menu.data('update-url'),
            '',
            $menu.data('issue-id'),
            $(this).data('id'),
          );
          reloadConfirmDraftComment();
        })();
      }

      let icon = '';
      if (input_id === '#milestone_id') {
        icon = svg('octicon-milestone', 18, 'tw-mr-2');
      } else if (input_id === '#project_id') {
        icon = svg('octicon-project', 18, 'tw-mr-2');
      } else if (input_id === '#assignee_id') {
        icon = `<img class="ui avatar image tw-mr-2" alt="avatar" src=${$(this).data('avatar')}>`;
      }

      $list.find('.selected').html(`
        <a class="item muted sidebar-item-link" href="${htmlEscape(this.getAttribute('data-href'))}">
          ${icon}
          ${htmlEscape(this.textContent)}
        </a>
      `);

      $(`.ui${select_id}.list .no-select`).addClass('tw-hidden');
      $(input_id).val($(this).data('id'));
    });
    $menu.find('.no-select.item').on('click', function () {
      $(this).parent().find('.item:not(.no-select)').each(function () {
        $(this).removeClass('selected active');
      });

      if (hasUpdateAction) {
        (async () => {
          await updateIssuesMeta(
            $menu.data('update-url'),
            '',
            $menu.data('issue-id'),
            $(this).data('id'),
          );
          reloadConfirmDraftComment();
        })();
      }

      $list.find('.selected').html('');
      $list.find('.no-select').removeClass('tw-hidden');
      $(input_id).val('');
    });
  }

  // Milestone, Assignee, Project
  selectItem('.select-project', '#project_id');
  selectItem('.select-milestone', '#milestone_id');
  selectItem('.select-assignee', '#assignee_id');
}

export function initRepository() {
  if (!$('.page-content.repository').length) return;

  initRepoBranchTagSelector('.js-branch-tag-selector');

  // Options
  if ($('.repository.settings.options').length > 0) {
    // Enable or select internal/external wiki system and issue tracker.
    $('.enable-system').on('change', function () {
      if (this.checked) {
        $($(this).data('target')).removeClass('disabled');
        if (!$(this).data('context')) $($(this).data('context')).addClass('disabled');
      } else {
        $($(this).data('target')).addClass('disabled');
        if (!$(this).data('context')) $($(this).data('context')).removeClass('disabled');
      }
    });
    $('.enable-system-radio').on('change', function () {
      if (this.value === 'false') {
        $($(this).data('target')).addClass('disabled');
        if ($(this).data('context') !== undefined) $($(this).data('context')).removeClass('disabled');
      } else if (this.value === 'true') {
        $($(this).data('target')).removeClass('disabled');
        if ($(this).data('context') !== undefined) $($(this).data('context')).addClass('disabled');
      }
    });
    const $trackerIssueStyleRadios = $('.js-tracker-issue-style');
    $trackerIssueStyleRadios.on('change input', () => {
      const checkedVal = $trackerIssueStyleRadios.filter(':checked').val();
      $('#tracker-issue-style-regex-box').toggleClass('disabled', checkedVal !== 'regexp');
    });
  }

  // Labels
  initCompLabelEdit('.repository.labels');

  // Milestones
  if ($('.repository.new.milestone').length > 0) {
    $('#clear-date').on('click', () => {
      $('#deadline').val('');
      return false;
    });
  }

  // Repo Creation
  if ($('.repository.new.repo').length > 0) {
    $('input[name="gitignores"], input[name="license"]').on('change', () => {
      const gitignores = $('input[name="gitignores"]').val();
      const license = $('input[name="license"]').val();
      if (gitignores || license) {
        document.querySelector('input[name="auto_init"]').checked = true;
      }
    });
  }

  // Compare or pull request
  const $repoDiff = $('.repository.diff');
  if ($repoDiff.length) {
    initRepoCommonBranchOrTagDropdown('.choose.branch .dropdown');
    initRepoCommonFilterSearchDropdown('.choose.branch .dropdown');
  }

  initRepoCloneLink();
  initCitationFileCopyContent();
  initRepoSettingBranches();

  // Issues
  if ($('.repository.view.issue').length > 0) {
    initRepoIssueCommentEdit();

    initRepoIssueBranchSelect();
    initRepoIssueTitleEdit();
    initRepoIssueWipToggle();
    initRepoIssueComments();

    initRepoDiffConversationNav();
    initRepoIssueReferenceIssue();

    initRepoIssueCommentDelete();
    initRepoIssueDependencyDelete();
    initRepoIssueCodeCommentCancel();
    initRepoPullRequestUpdate();
    initCompReactionSelector();

    initRepoPullRequestMergeForm();
    initRepoPullRequestCommitStatus();
  }

  // Pull request
  const $repoComparePull = $('.repository.compare.pull');
  if ($repoComparePull.length > 0) {
    // show pull request form
    $repoComparePull.find('button.show-form').on('click', function (e) {
      e.preventDefault();
      hideElem($(this).parent());

      const $form = $repoComparePull.find('.pullrequest-form');
      showElem($form);
    });
  }

  initUnicodeEscapeButton();
}