<template>
  <div>
    <div class="page-header">
      <h2>Email / SMTP</h2>
    </div>

    <div class="section-card">
      <div class="setting-group">
        <h3>Email Notifications</h3>
        <p class="setting-description">
          Configure SMTP settings to enable email notifications for alerts, toner reports,
          and other system notifications.
        </p>

        <div class="setting-row">
          <label class="toggle-label">
            <span>Enable Email Notifications</span>
            <button
              class="toggle-btn"
              :class="{ active: settings.smtp_enabled }"
              @click="toggleSetting('smtp_enabled')"
              :disabled="saving"
            >
              <span class="toggle-slider"></span>
            </button>
          </label>
        </div>

        <template v-if="settings.smtp_enabled">
          <div class="settings-grid">
            <div class="setting-row">
              <label>
                <span>SMTP Host</span>
                <input
                  type="text"
                  v-model="settings.smtp_host"
                  placeholder="smtp.example.com"
                  @blur="saveSetting('smtp_host', settings.smtp_host)"
                  :disabled="saving"
                >
              </label>
            </div>

            <div class="setting-row">
              <label>
                <span>SMTP Port</span>
                <input
                  type="number"
                  v-model="settings.smtp_port"
                  placeholder="587"
                  @blur="saveSetting('smtp_port', settings.smtp_port)"
                  :disabled="saving"
                >
              </label>
            </div>

            <div class="setting-row">
              <label>
                <span>Username</span>
                <input
                  type="text"
                  v-model="settings.smtp_username"
                  placeholder="username"
                  @blur="saveSetting('smtp_username', settings.smtp_username)"
                  :disabled="saving"
                >
              </label>
            </div>

            <div class="setting-row">
              <label>
                <span>Password</span>
                <input
                  type="password"
                  v-model="settings.smtp_password"
                  placeholder="password"
                  @blur="saveSetting('smtp_password', settings.smtp_password)"
                  :disabled="saving"
                >
              </label>
            </div>
          </div>

          <div class="setting-row">
            <label class="toggle-label">
              <span>Use TLS Encryption</span>
              <button
                class="toggle-btn"
                :class="{ active: settings.smtp_use_tls }"
                @click="toggleSetting('smtp_use_tls')"
                :disabled="saving"
              >
                <span class="toggle-slider"></span>
              </button>
            </label>
          </div>

          <div class="settings-grid">
            <div class="setting-row">
              <label>
                <span>From Address</span>
                <input
                  type="email"
                  v-model="settings.smtp_from_address"
                  placeholder="noreply@example.com"
                  @blur="saveSetting('smtp_from_address', settings.smtp_from_address)"
                  :disabled="saving"
                >
              </label>
            </div>

            <div class="setting-row">
              <label>
                <span>From Name</span>
                <input
                  type="text"
                  v-model="settings.smtp_from_name"
                  placeholder="ShopDB"
                  @blur="saveSetting('smtp_from_name', settings.smtp_from_name)"
                  :disabled="saving"
                >
              </label>
            </div>
          </div>

          <div class="setting-row full-width">
            <label>
              <span>Default Alert Recipients</span>
              <input
                type="text"
                v-model="settings.alert_recipients"
                placeholder="user1@example.com, user2@example.com"
                @blur="saveSetting('alert_recipients', settings.alert_recipients)"
                :disabled="saving"
              >
              <small class="input-hint">Comma-separated list of email addresses</small>
            </label>
          </div>

          <div class="status-indicator">
            <span class="status-dot" :class="smtpStatus"></span>
            <span>{{ smtpMessage }}</span>
          </div>

          <button
            class="test-btn"
            @click="testEmail"
            :disabled="saving || testingEmail || !canTestEmail"
          >
            {{ testingEmail ? 'Sending...' : 'Send Test Email' }}
          </button>
        </template>
      </div>
    </div>

    <div v-if="error" class="error-message">{{ error }}</div>
    <div v-if="success" class="settings-success">{{ success }}</div>
  </div>
</template>

<script setup>
import { onMounted, ref, computed } from 'vue'
import { useSystemSettings } from '../../composables/systemSettings'
import { apiError } from '../../utils/apiError'
import { settingsApi } from '../../api'

const {
  settings, saving, error, success,
  loadSettings, saveSetting, toggleSetting,
} = useSystemSettings()

const testingEmail = ref(false)

// Per-page connection status (stays with the page, not the composable).
const smtpStatus = computed(() => {
  if (!settings.smtp_enabled) return 'inactive'
  if (!settings.smtp_host || !settings.smtp_from_address) return 'warning'
  return 'pending'
})

const smtpMessage = computed(() => {
  if (!settings.smtp_enabled) return 'Disabled'
  if (!settings.smtp_host) return 'SMTP host not configured'
  if (!settings.smtp_from_address) return 'From address not configured'
  return 'Configured - use test button to verify'
})

const canTestEmail = computed(() => {
  return settings.smtp_host && settings.smtp_from_address && settings.alert_recipients
})

async function testEmail() {
  testingEmail.value = true
  error.value = ''
  success.value = ''
  try {
    // Send to the configured Alert Recipients (the endpoint splits the list).
    const response = await settingsApi.testEmail(settings.alert_recipients)
    const result = response.data?.data || {}
    if (result.sent) {
      success.value = `Test email sent to ${settings.alert_recipients}`
    } else {
      error.value = result.error
        ? `Test email failed: ${result.error}`
        : (response.data?.message || 'Email is not configured')
    }
  } catch (e) {
    error.value = apiError(e, 'Failed to send test email')
  } finally {
    testingEmail.value = false
    setTimeout(() => { success.value = '' }, 4000)
  }
}

onMounted(loadSettings)
</script>
