import { SETTINGS_KEY, DEFAULT_SETTINGS } from "../constants";
import { cloneObject, removeTags } from "../helpers";
import { usePhondueDigraphs } from "./KeyboardFire/phondue/ipaField";
import { renderWords } from "./render/words";
import { addMessage, hasToken, objectValuesAreDifferent } from "./utilities";
import { enableHotKeys, disableHotKeys } from "./hotkeys";
import { showTemplateEditor, renderTemplateSelectOptions, showSelectedTemplate } from "./render/settings";

export function loadSettings() {
  const storedSettings = window.localStorage.getItem(SETTINGS_KEY);
  window.settings = storedSettings ? JSON.parse(storedSettings) : cloneObject(DEFAULT_SETTINGS);
  toggleIPAPronunciationFields(false);
  toggleShowAdvancedFields();
}

export function saveSettings() {
  window.localStorage.setItem(SETTINGS_KEY, JSON.stringify(window.settings));
  addMessage('Settings Saved!');
}

export function openSettingsModal() {
  const { useIPAPronunciationField, useHotkeys, showAdvanced, defaultTheme, templates } = window.settings;

  document.getElementById('settingsUseIPA').checked = useIPAPronunciationField;
  document.getElementById('settingsUseHotkeys').checked = useHotkeys;
  document.getElementById('settingsShowAdvanced').checked = showAdvanced;
  document.getElementById('settingsDefaultTheme').value = defaultTheme;

  renderTemplateSelectOptions();
  showTemplateEditor(false);

  document.getElementById('settingsModal').style.display = '';
}

export function updateTemplateSelects() {
  const { templates } = window.settings;

  if (typeof templates !== 'undefined') {
    const templatesOptionsHTML = templates.map((template, index) => {
      return `<option value="${index.toString()}">${template.name}</options>`;
    }).join('');
    document.getElementById('savedDetailsTemplates').innerHTML = templatesOptionsHTML;

    const templateSelects = document.getElementsByClassName('template-select');
    Array.from(templateSelects).forEach(select => {
      select.removeEventListener('click', showWordOptions);
      select.innerHTML = templatesOptionsHTML;
      select.addEventListener('click', showWordOptions);
    })
  }
}

export function createTemplate() {
  window.settings.templates.push({ name: 'New Blank Template', template: '' });
  const newTemplateIndex = window.settings.templates.length - 1;

  renderTemplateSelectOptions();
  document.getElementById('savedDetailsTemplates').value = (newTemplateIndex).toString();

  editSavedTemplate(newTemplateIndex);
}

export function saveTemplate() {
  const nameField = document.getElementById('templateNameField');
  const name = nameField.value.trim();
  const index = parseInt(nameField.getAttribute('template'));
  const template = document.getElementById('templateTextarea').value;
  window.settings.templates[index] = { name, template };

  let storedSettings = window.localStorage.getItem(SETTINGS_KEY);
  storedSettings = storedSettings ? JSON.parse(storedSettings) : cloneObject(DEFAULT_SETTINGS);
  storedSettings.templates = window.settings.templates;
  window.localStorage.setItem(SETTINGS_KEY, JSON.stringify(storedSettings));
  addMessage('Templates Saved!');
  
  showTemplateEditor(false);

  renderTemplateSelectOptions();
}

export function deleteSelectedTemplate() {
  const nameField = document.getElementById('templateNameField');
  const index = nameField.getAttribute('template');
  const name = window.settings.templates[index].name;
  if (confirm(`Are you sure you want to delete the "${name}" template? This cannot be undone!`)) {
    delete window.settings.templates[index];
    window.settings.templates = window.settings.templates.filter(template => template != null);

    saveSettings();

    showTemplateEditor(false);

    renderTemplateSelectOptions();
  }
}

export function editSavedTemplate(selectEvent) {
  const { templates } = window.settings;
  const selectedIndex = typeof selectEvent.target !== 'undefined' ? selectEvent.target.value : selectEvent;

  if (selectedIndex !== '') {
    showSelectedTemplate(templates[selectedIndex], selectedIndex);
  } else {
    showTemplateEditor(false);
  }
}

export function saveSettingsModal() {
  const updatedSettings = cloneObject(window.settings);
  updatedSettings.useIPAPronunciationField = document.getElementById('settingsUseIPA').checked;
  updatedSettings.useHotkeys = document.getElementById('settingsUseHotkeys').checked;
  updatedSettings.showAdvanced = document.getElementById('settingsShowAdvanced').checked;
  updatedSettings.defaultTheme = document.getElementById('settingsDefaultTheme').value;

  if (hasToken()) {
    import('./account/index.js').then(account => {
      const emailField = document.getElementById('accountSettingsEmail');
      let email = removeTags(emailField.value).trim();
      const publicName = document.getElementById('accountSettingsPublicName');
      if (!/.+@.+\..+/.test(email)) {
        email = window.account.email;
        emailField.value = email;
      }
      const updatedAccount = cloneObject(window.account);
      updatedAccount.email = email;
      updatedAccount.publicName = removeTags(publicName.value).trim();
      updatedAccount.allowEmails = document.getElementById('accountSettingsAllowEmails').checked;

      const newPassword = document.getElementById('accountSettingsNewPassword').value;

      if (objectValuesAreDifferent(updatedAccount, window.account)) {
        window.account = Object.assign(window.account, updatedAccount);
        account.editAccount(Object.assign({ newPassword }, window.account));
      } else {
        addMessage('No changes made to Account.');
      }
    });
  }

  if (objectValuesAreDifferent(updatedSettings, window.settings)) {
    window.settings = Object.assign(window.settings, updatedSettings);
    saveSettings();
    toggleHotkeysEnabled();
    toggleIPAPronunciationFields();
    toggleShowAdvancedFields();
  } else {
    addMessage('No changes made to Settings.');
  }
}

export function saveAndCloseSettingsModal() {
  saveSettingsModal();
  document.getElementById('settingsModal').style.display = 'none';
}

export function toggleHotkeysEnabled() {
  disableHotKeys();
  if (window.settings.useHotkeys) {
    enableHotKeys();
  }
}

export function toggleIPAPronunciationFields(render = true) {
  const ipaButtons = document.querySelectorAll('.ipa-field-help-button'),
    ipaFields = document.querySelectorAll('.ipa-field');
  if (!window.settings.useIPAPronunciationField) {
    Array.from(ipaButtons).forEach(button => {
      button.style.display = 'none';
    });
    Array.from(ipaFields).forEach(field => {
      field.removeEventListener('keypress', usePhondueDigraphs);
    });
  } else {
    Array.from(ipaButtons).forEach(button => {
      button.style.display = '';
    });
    Array.from(ipaFields).forEach(field => {
      field.addEventListener('keypress', usePhondueDigraphs);
    });
  }
  if (render) {
    renderWords();
  }
}

export function toggleShowAdvancedFields() {
  const buttons = document.getElementsByClassName('expand-advanced-form'),
    forms = document.getElementsByClassName('advanced-word-form');
  const formsWithFilledFields = [];

  Array.from(forms).forEach(form => {
    const fields = form.querySelectorAll('input, textarea');
    const formHasFieldFilled = Array.from(fields).some(field => field.value.trim() !== '');
    if (window.settings.showAdvanced || formHasFieldFilled) {
      form.style.display = 'block';
    } else {
      form.style.display = 'none';
    }
    if (formHasFieldFilled) {
      formsWithFilledFields.push(form.id.replace('advancedForm', ''));
    }
  });
  Array.from(buttons).forEach(button => {
    const formHasFilledField = formsWithFilledFields.includes(button.id.replace('expandAdvancedForm', ''));
    if (window.settings.showAdvanced || formHasFilledField) {
      button.innerText = 'Hide Advanced Fields';
    } else {
      button.innerText = 'Show Advanced Fields';
    }
  });
}