// Account: who you are signed in as, changing your password, signing out.

import * as api from './api.js';
import { h, clear, icon, toast } from './ui.js';
import { initial } from './format.js';
import { state } from './state.js';
import { signOut } from './app.js';

const view = () => document.getElementById('view-more');

// Rendered once per visit rather than on every poll, so a half-typed password
// is never wiped out from under you.
export function show() {
  render();
}

function render() {
  const { user, has_password: hasPassword } = state.me;
  clear(view(),
    h('div', { class: 'card account-card' },
      h('div', { class: 'avatar', text: initial(user.username) }),
      h('div', {},
        h('div', { class: 'account-name', text: user.username }),
        h('div', { class: 'account-email', text: user.email }))),

    h('div', { class: 'page-head' }, h('h2', { text: 'Notifications' })),
    notifyForm(user),

    ...passwordSection(user, hasPassword),

    h('div', { class: 'only-desktop' },
      h('div', { class: 'page-head' }, h('h2', { text: 'Keyboard' })),
      h('div', { class: 'card' }, shortcuts())),

    h('div', { class: 'page-head' }),
    h('button', { class: 'btn btn-block', type: 'button', onclick: signOut }, icon('logout'), 'Sign out'),
  );
}

// Where this user's pages go. The onboarding checklist's first step sends
// people here for it, and until now there was nothing here to send them to:
// the topic could only be set with curl or by an administrator.
//
// The topic is the whole address — the server it is published to is the
// install's one ntfy, set in the deployment and not something a user picks.
function notifyForm(user) {
  const err = h('p', { class: 'form-error', role: 'alert', hidden: true });
  const ok = h('p', { class: 'form-ok', role: 'status', hidden: true });
  const topic = h('input', {
    name: 'ntfy_topic', type: 'text', autocomplete: 'off',
    autocapitalize: 'none', spellcheck: false,
    value: user.ntfy_topic || '',
    placeholder: 'terdut-a7f3c91e',
  });
  const submit = h('button', { class: 'btn btn-primary', type: 'submit', text: 'Save topic' });

  // Only offered once a topic is saved: the test publishes to whatever the
  // server has stored, not to whatever is half-typed in the field.
  const test = h('button', {
    class: 'btn', type: 'button', text: 'Send a test push',
    hidden: !user.ntfy_topic,
    onclick: async () => {
      err.hidden = true;
      ok.hidden = true;
      test.disabled = true;
      try {
        await api.testNotification();
        ok.textContent = 'Sent. If nothing arrives, the topic is wrong or ntfy is not reachable.';
        ok.hidden = false;
      } catch (ex) {
        err.textContent = ex.message;
        err.hidden = false;
      } finally {
        test.disabled = false;
      }
    },
  });

  const form = h('form', { class: 'card pw-form' },
    h('label', {},
      h('span', { text: 'ntfy topic' }),
      topic),
    h('p', { class: 'muted small' },
      'Subscribe to this topic in the ntfy app and incidents assigned to you ',
      'reach your phone. Leave it empty and they page the team’s fallback ',
      'topic instead.'),
    // Worth saying plainly: people reach for their own name, and the topic is
    // the only thing standing between a stranger and their pages.
    h('p', { class: 'muted small' },
      'Anyone who knows the topic can read your pages and publish to it, so ',
      'pick something unguessable rather than your name.'),
    err, ok,
    h('div', { class: 'row-actions' }, submit, test),
  );

  form.addEventListener('submit', async (e) => {
    e.preventDefault();
    err.hidden = true;
    ok.hidden = true;
    submit.disabled = true;
    try {
      const updated = await api.setNotifyTarget(user.id, topic.value.trim());
      // Keep the cached user in step, so the onboarding checklist stops
      // asking for this and the test button appears without a reload.
      state.me.user = updated;
      ok.textContent = updated.ntfy_topic
        ? 'Topic saved.'
        : 'Topic cleared. Your pages go to the team’s fallback topic.';
      ok.hidden = false;
      test.hidden = !updated.ntfy_topic;
    } catch (ex) {
      err.textContent = ex.message;
      err.hidden = false;
    } finally {
      submit.disabled = false;
    }
  });
  return form;
}

// With password login switched off a password opens nothing, so somebody who
// has none is not asked to make one. Somebody who does keeps the form: it is
// how they change or get rid of a credential the server still remembers.
function passwordSection(user, hasPassword) {
  if (!hasPassword && state.auth.password_login === false) {
    const name = state.auth.oidc?.name || 'single sign-on';
    return [
      h('div', { class: 'page-head' }, h('h2', { text: 'Password' })),
      h('div', { class: 'card' },
        h('p', { class: 'muted', text: `You sign in with ${name}, and this server has turned password login off.` })),
    ];
  }
  return [
    h('div', { class: 'page-head' }, h('h2', { text: hasPassword ? 'Change password' : 'Set a password' })),
    passwordForm(user, hasPassword),
  ];
}

function passwordForm(user, hasPassword) {
  const err = h('p', { class: 'form-error', role: 'alert', hidden: true });
  const ok = h('p', { class: 'form-ok', role: 'status', hidden: true });
  const current = hasPassword
    ? h('input', { name: 'current', type: 'password', autocomplete: 'current-password', required: true })
    : null;
  const next = h('input', { name: 'next', type: 'password', autocomplete: 'new-password', required: true, minlength: '10' });
  const again = h('input', { name: 'again', type: 'password', autocomplete: 'new-password', required: true, minlength: '10' });
  const submit = h('button', { class: 'btn btn-primary', type: 'submit', text: 'Save password' });

  // A hidden username field lets password managers file the new password
  // under the right account.
  const form = h('form', { class: 'card pw-form', autocomplete: 'on' },
    h('input', { type: 'text', name: 'username', autocomplete: 'username', value: user.username, hidden: true, readonly: true }),
    current && h('label', {}, h('span', { text: 'Current password' }), current),
    h('label', {}, h('span', { text: 'New password' }), next),
    h('label', {}, h('span', { text: 'Repeat new password' }), again),
    err, ok, submit,
  );

  form.addEventListener('submit', async (e) => {
    e.preventDefault();
    err.hidden = true;
    ok.hidden = true;
    if (next.value !== again.value) {
      err.textContent = 'The new passwords do not match.';
      err.hidden = false;
      return;
    }
    submit.disabled = true;
    try {
      await api.setPassword(user.id, next.value, current ? current.value : '');
      state.me.has_password = true;
      form.reset();
      if (!current) {
        // From now on the form needs the current-password field.
        render();
        toast('Password saved');
        return;
      }
      ok.textContent = 'Password saved. Other devices have been signed out.';
      ok.hidden = false;
    } catch (ex) {
      err.textContent = ex.message;
      err.hidden = false;
    } finally {
      submit.disabled = false;
    }
  });
  return form;
}

function shortcuts() {
  const rows = [
    ['j / k', 'Move through the queue'],
    ['Enter', 'Open incident'],
    ['Esc', 'Back to the queue'],
    ['f', 'Cycle the queue filter'],
    ['a / A', 'Acknowledge / clear acknowledgement'],
    ['R', 'Resolve (asks first)'],
    ['s', 'Assign'],
    ['z / Z', 'Snooze / end snooze'],
    ['c', 'Add a note'],
    ['x', 'Archive / unarchive a resolved incident'],
    ['r', 'Refresh now'],
  ];
  return h('table', { class: 'kbd-table' },
    h('tbody', {}, rows.map(([k, v]) =>
      h('tr', {},
        h('td', {}, k.split(' / ').map((x, i) => [i ? ' / ' : '', h('kbd', { text: x })])),
        h('td', { text: v })))));
}