<script setup lang="ts">
import { useSettingsStore } from "@/stores/settings/GeneralSettingsStore";
import { computed, onBeforeMount, ref } from "vue";
import { useStateStore } from "@/stores/StateStore";
import PvIcon from "@/components/common/pv-icon.vue";

interface MetricItem {
  header: string;
  value?: string;
}

const generalMetrics = computed<MetricItem[]>(() => [
  {
    header: "Version",
    value: useSettingsStore().general.version || "Unknown"
  },
  {
    header: "Hardware Model",
    value: useSettingsStore().general.hardwareModel || "Unknown"
  },
  {
    header: "Platform",
    value: useSettingsStore().general.hardwarePlatform || "Unknown"
  },
  {
    header: "GPU Acceleration",
    value: useSettingsStore().general.gpuAcceleration || "Unknown"
  }
]);

const platformMetrics = computed<MetricItem[]>(() => {
  const stats = [
    {
      header: "CPU Temp",
      value: useSettingsStore().metrics.cpuTemp === undefined ? "Unknown" : `${useSettingsStore().metrics.cpuTemp}°C`
    },
    {
      header: "CPU Usage",
      value: useSettingsStore().metrics.cpuUtil === undefined ? "Unknown" : `${useSettingsStore().metrics.cpuUtil}%`
    },
    {
      header: "CPU Memory Usage",
      value:
        useSettingsStore().metrics.ramUtil === undefined || useSettingsStore().metrics.cpuMem === undefined
          ? "Unknown"
          : `${useSettingsStore().metrics.ramUtil || "Unknown"}MB of ${useSettingsStore().metrics.cpuMem}MB`
    },
    {
      header: "GPU Memory Usage",
      value:
        useSettingsStore().metrics.gpuMemUtil === undefined || useSettingsStore().metrics.gpuMem === undefined
          ? "Unknown"
          : `${useSettingsStore().metrics.gpuMemUtil}MB of ${useSettingsStore().metrics.gpuMem}MB`
    },
    {
      header: "CPU Throttling",
      value: useSettingsStore().metrics.cpuThr || "Unknown"
    },
    {
      header: "CPU Uptime",
      value: useSettingsStore().metrics.cpuUptime || "Unknown"
    },
    {
      header: "Disk Usage",
      value: useSettingsStore().metrics.diskUtilPct || "Unknown"
    }
  ];

  if (useSettingsStore().metrics.npuUsage) {
    stats.push({
      header: "NPU Usage",
      value: useSettingsStore().metrics.npuUsage || "Unknown"
    });
  }

  return stats;
});

const metricsLastFetched = ref("Never");
const fetchMetrics = () => {
  useSettingsStore()
    .requestMetricsUpdate()
    .catch((error) => {
      if (error.request) {
        useStateStore().showSnackbarMessage({
          color: "error",
          message: "Unable to fetch metrics! The backend didn't respond."
        });
      } else {
        useStateStore().showSnackbarMessage({
          color: "error",
          message: "An error occurred while trying to fetch metrics."
        });
      }
    })
    .finally(() => {
      const pad = (num: number): string => {
        return String(num).padStart(2, "0");
      };

      const date = new Date();
      metricsLastFetched.value = `${pad(date.getHours())}:${pad(date.getMinutes())}:${pad(date.getSeconds())}`;
    });
};

onBeforeMount(() => {
  fetchMetrics();
});
</script>

<template>
  <v-card dark class="mb-3 pr-6 pb-3" style="background-color: #006492">
    <v-card-title style="display: flex; justify-content: space-between">
      <span>Stats</span>
      <pv-icon icon-name="mdi-reload" color="white" tooltip="Reload Metrics" hover @click="fetchMetrics" />
    </v-card-title>
    <v-row class="pt-2 pa-4 ma-0 ml-5 pb-1">
      <v-card-subtitle class="ma-0 pa-0 pb-2" style="font-size: 16px"> General Metrics </v-card-subtitle>
      <v-simple-table class="metrics-table">
        <thead>
          <tr>
            <th v-for="(item, itemIndex) in generalMetrics" :key="itemIndex" class="metric-item metric-item-title">
              {{ item.header }}
            </th>
          </tr>
        </thead>
        <tbody>
          <tr>
            <td v-for="(item, itemIndex) in generalMetrics" :key="itemIndex" class="metric-item">
              {{ item.value }}
            </td>
          </tr>
        </tbody>
      </v-simple-table>
    </v-row>
    <v-row class="pa-4 ma-0 ml-5">
      <v-card-subtitle class="ma-0 pa-0 pb-2" style="font-size: 16px"> Hardware Metrics </v-card-subtitle>
      <v-simple-table class="metrics-table">
        <thead>
          <tr>
            <th v-for="(item, itemIndex) in platformMetrics" :key="itemIndex" class="metric-item metric-item-title">
              {{ item.header }}
            </th>
          </tr>
        </thead>
        <tbody>
          <tr>
            <td v-for="(item, itemIndex) in platformMetrics" :key="itemIndex" class="metric-item">
              <span v-if="useSettingsStore().metrics.cpuUtil !== undefined">{{ item.value }}</span>
              <span v-else>---</span>
            </td>
          </tr>
        </tbody>
      </v-simple-table>
    </v-row>
    <div style="text-align: right">
      <span>Last Fetched: {{ metricsLastFetched }}</span>
    </div>
  </v-card>
</template>

<style scoped lang="scss">
.metrics-table {
  border-collapse: separate;
  border-spacing: 0;
  border-radius: 5px;
  margin-bottom: 10px;
  border: 1px solid white;
  width: 100%;
  text-align: center;
}

.metric-item {
  font-size: 16px !important;
  padding: 1px 15px 1px 10px;
  border-right: 1px solid;
  font-weight: normal;
  color: white !important;
  text-align: center !important;
}

.metric-item-title {
  font-size: 18px !important;
  text-decoration: underline;
  text-decoration-color: #ffd843;
}

.v-data-table {
  thead,
  tbody {
    background-color: #006492;
  }

  :hover {
    tbody > tr {
      background-color: #005281 !important;
    }
  }

  ::-webkit-scrollbar {
    width: 0;
    height: 0.55em;
    border-radius: 5px;
  }

  ::-webkit-scrollbar-track {
    -webkit-box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.3);
    border-radius: 10px;
  }

  ::-webkit-scrollbar-thumb {
    background-color: #ffd843;
    border-radius: 10px;
  }
}
</style>
