<template>
  <div class="pa-4">
    <div class="d-flex align-center mb-6">
      <v-btn
        icon="mdi-arrow-left"
        variant="text"
        @click="$router.back()"
        class="mr-4"
      />
      <div>
        <h1 class="text-h4 mb-1">Audit Logs</h1>
        <p class="text-subtitle-1 text-grey-darken-1">View system audit trail and user activities</p>
      </div>
    </div>

    <v-row>
      <v-col cols="12" md="6" lg="3">
        <v-card>
          <v-card-text>
            <div class="d-flex align-center">
              <v-icon color="primary" size="large" class="mr-3">mdi-chart-line</v-icon>
              <div>
                <div class="text-h6">{{ stats.totalEvents }}</div>
                <div class="text-caption text-grey-darken-1">Total Events</div>
              </div>
            </div>
          </v-card-text>
        </v-card>
      </v-col>

      <v-col cols="12" md="6" lg="3">
        <v-card>
          <v-card-text>
            <div class="d-flex align-center">
              <v-icon color="success" size="large" class="mr-3">mdi-check-circle</v-icon>
              <div>
                <div class="text-h6">{{ stats.successRate }}%</div>
                <div class="text-caption text-grey-darken-1">Success Rate</div>
              </div>
            </div>
          </v-card-text>
        </v-card>
      </v-col>

      <v-col cols="12" md="6" lg="3">
        <v-card>
          <v-card-text>
            <div class="d-flex align-center">
              <v-icon color="warning" size="large" class="mr-3">mdi-alert-circle</v-icon>
              <div>
                <div class="text-h6">{{ stats.errorCount }}</div>
                <div class="text-caption text-grey-darken-1">Errors Today</div>
              </div>
            </div>
          </v-card-text>
        </v-card>
      </v-col>

      <v-col cols="12" md="6" lg="3">
        <v-card>
          <v-card-text>
            <div class="d-flex align-center">
              <v-icon color="info" size="large" class="mr-3">mdi-account-multiple</v-icon>
              <div>
                <div class="text-h6">{{ stats.activeUsers }}</div>
                <div class="text-caption text-grey-darken-1">Active Users</div>
              </div>
            </div>
          </v-card-text>
        </v-card>
      </v-col>
    </v-row>

    <v-card class="mt-6">
      <v-card-title>
        <div class="d-flex align-center justify-space-between">
          <span>Recent Audit Events</span>
          <v-btn
            @click="refreshLogs"
            :loading="loading"
            icon="mdi-refresh"
            variant="text"
            size="small"
          />
        </div>
      </v-card-title>

      <v-card-text>
        <div class="d-flex flex-wrap gap-3 mb-4">
          <v-text-field
            v-model="search"
            label="Search events..."
            prepend-inner-icon="mdi-magnify"
            variant="outlined"
            density="compact"
            hide-details
            clearable
            style="max-width: 300px"
          />
          
          <v-select
            v-model="filterLevel"
            :items="['all', 'info', 'warning', 'error']"
            label="Filter by level"
            variant="outlined"
            density="compact"
            hide-details
            style="max-width: 150px"
          />
          
          <v-select
            v-model="filterAction"
            :items="['all', 'create', 'update', 'delete', 'login', 'logout']"
            label="Filter by action"
            variant="outlined"
            density="compact"
            hide-details
            style="max-width: 150px"
          />
        </div>

        <v-data-table
          :headers="headers"
          :items="filteredLogs"
          :search="search"
          :loading="loading"
          :items-per-page="25"
          :items-per-page-options="[10, 25, 50, 100]"
          class="elevation-1"
        >
          <template #item.level="{ item }">
            <v-chip
              :color="getLevelColor(item.level)"
              size="small"
              variant="tonal"
            >
              {{ item.level.toUpperCase() }}
            </v-chip>
          </template>

          <template #item.action="{ item }">
            <v-chip
              :color="getActionColor(item.action)"
              size="small"
              variant="outlined"
            >
              {{ item.action }}
            </v-chip>
          </template>

          <template #item.timestamp="{ item }">
            <div class="text-caption">
              <div>{{ formatDate(item.timestamp) }}</div>
              <div class="text-grey-darken-1">{{ formatTime(item.timestamp) }}</div>
            </div>
          </template>

          <template #item.actions="{ item }">
            <v-btn
              @click="viewDetails(item)"
              icon="mdi-eye"
              size="small"
              variant="text"
            />
          </template>
        </v-data-table>
      </v-card-text>
    </v-card>

    <!-- Details Dialog -->
    <v-dialog v-model="showDetails" max-width="600">
      <v-card v-if="selectedLog">
        <v-card-title>
          <span class="text-h6">Audit Log Details</span>
          <v-spacer />
          <v-btn icon="mdi-close" @click="showDetails = false" variant="text" />
        </v-card-title>

        <v-card-text>
          <v-row>
            <v-col cols="12" md="6">
              <div class="mb-3">
                <div class="text-caption text-grey-darken-1">TIMESTAMP</div>
                <div>{{ formatDateTime(selectedLog.timestamp) }}</div>
              </div>
            </v-col>
            <v-col cols="12" md="6">
              <div class="mb-3">
                <div class="text-caption text-grey-darken-1">LEVEL</div>
                <v-chip
                  :color="getLevelColor(selectedLog.level)"
                  size="small"
                  variant="tonal"
                >
                  {{ selectedLog.level.toUpperCase() }}
                </v-chip>
              </div>
            </v-col>
            <v-col cols="12" md="6">
              <div class="mb-3">
                <div class="text-caption text-grey-darken-1">ACTION</div>
                <div>{{ selectedLog.action }}</div>
              </div>
            </v-col>
            <v-col cols="12" md="6">
              <div class="mb-3">
                <div class="text-caption text-grey-darken-1">USER</div>
                <div>{{ selectedLog.user || 'System' }}</div>
              </div>
            </v-col>
            <v-col cols="12">
              <div class="mb-3">
                <div class="text-caption text-grey-darken-1">RESOURCE</div>
                <div>{{ selectedLog.resource }}</div>
              </div>
            </v-col>
            <v-col cols="12">
              <div class="mb-3">
                <div class="text-caption text-grey-darken-1">MESSAGE</div>
                <div>{{ selectedLog.message }}</div>
              </div>
            </v-col>
            <v-col cols="12" v-if="selectedLog.metadata">
              <div class="mb-3">
                <div class="text-caption text-grey-darken-1">METADATA</div>
                <pre class="text-caption bg-grey-lighten-4 pa-2 rounded">{{ JSON.stringify(selectedLog.metadata, null, 2) }}</pre>
              </div>
            </v-col>
          </v-row>
        </v-card-text>
      </v-card>
    </v-dialog>
  </div>
</template>

<script setup>
import { formatDate, formatTime, formatDateTime } from '@/utils/dateUtils'

definePageMeta({
  middleware: ['authentication', 'authorization'],
  auth: {
    roles: ['admin']
  }
})

useHead({
  title: 'Audit Logs - Admin'
})

const { isAdmin } = useAuthorization()

// Redirect if not admin
if (!isAdmin()) {
  throw createError({
    statusCode: 403,
    statusMessage: 'Access denied'
  })
}

const loading = ref(false)
const search = ref('')
const filterLevel = ref('all')
const filterAction = ref('all')
const showDetails = ref(false)
const selectedLog = ref(null)

const stats = ref({
  totalEvents: 0,
  successRate: 100,
  errorCount: 0,
  activeUsers: 0
})

const logs = ref([])

const headers = [
  { title: 'Timestamp', key: 'timestamp', width: 150 },
  { title: 'Level', key: 'level', width: 100 },
  { title: 'Action', key: 'action', width: 120 },
  { title: 'User', key: 'user', width: 150 },
  { title: 'Resource', key: 'resource', width: 200 },
  { title: 'Message', key: 'message' },
  { title: 'Actions', key: 'actions', sortable: false, width: 80 }
]

const filteredLogs = computed(() => {
  let filtered = logs.value

  if (filterLevel.value !== 'all') {
    filtered = filtered.filter(log => log.level === filterLevel.value)
  }

  if (filterAction.value !== 'all') {
    filtered = filtered.filter(log => log.action === filterAction.value)
  }

  return filtered
})

const getLevelColor = (level) => {
  const colors = {
    info: 'blue',
    warning: 'orange',
    error: 'red',
    success: 'green'
  }
  return colors[level] || 'grey'
}

const getActionColor = (action) => {
  const colors = {
    create: 'green',
    update: 'blue',
    delete: 'red',
    login: 'purple',
    logout: 'grey'
  }
  return colors[action] || 'grey'
}

const viewDetails = (log) => {
  selectedLog.value = log
  showDetails.value = true
}

const refreshLogs = async () => {
  loading.value = true
  try {
    const [logsResponse, statsResponse] = await Promise.all([
      $fetch('/api/admin/audit-logs/list'),
      $fetch('/api/admin/audit-logs/stats')
    ])

    if (logsResponse.success) {
      logs.value = logsResponse.data
    }

    if (statsResponse.success) {
      stats.value = statsResponse.data
    }
  } catch (error) {
    console.error('Failed to load audit logs:', error)
    
    // Show sample data for now
    logs.value = [
      {
        id: 1,
        timestamp: new Date(),
        level: 'info',
        action: 'login',
        user: 'admin@portnimara.dev',
        resource: 'auth',
        message: 'User logged in successfully',
        metadata: { ip: '127.0.0.1', userAgent: 'Mozilla/5.0...' }
      },
      {
        id: 2,
        timestamp: new Date(Date.now() - 300000),
        level: 'info',
        action: 'create',
        user: 'admin@portnimara.dev',
        resource: 'interest',
        message: 'New interest record created',
        metadata: { id: 123, name: 'John Doe' }
      },
      {
        id: 3,
        timestamp: new Date(Date.now() - 600000),
        level: 'warning',
        action: 'update',
        user: 'admin@portnimara.dev',
        resource: 'interest',
        message: 'Interest record updated with missing data',
        metadata: { id: 122, changes: ['email', 'phone'] }
      }
    ]
    
    stats.value = {
      totalEvents: logs.value.length,
      successRate: 100,
      errorCount: 0,
      activeUsers: 1
    }
  }
  loading.value = false
}

// Load data on mount
onMounted(() => {
  refreshLogs()
})
</script>
