<template>
  <MaintenanceTile
    icon="mdi-file-alert"
    title="Failed processing"
    blurb="Triage originals that failed GPU processing — probe the files, flag defects, recover them."
  >
    <p class="fc-muted text-body-2 mb-3">
      A job that keeps failing parks as an error with its reason. A background
      probe then checks the FILE itself (checksum + decode) and splits the
      errors: <b>defective files</b> (truncated/corrupt originals — listed below
      for recovery) vs <b>file&nbsp;OK</b> (the failure was operational; requeue
      those with <i>Retry errored jobs</i> on the GPU agent card).
    </p>

    <div v-if="loading" class="fc-muted text-body-2">Loading…</div>
    <template v-else-if="overview">
      <div class="fc-queue mb-3">
        <div class="fc-q"><div class="fc-q__n">{{ overview.total }}</div><div class="fc-q__l">errored</div></div>
        <div class="fc-q"><div class="fc-q__n" :class="overview.triage.defect ? 'fc-weak' : ''">{{ overview.triage.defect }}</div><div class="fc-q__l">defective</div></div>
        <div class="fc-q"><div class="fc-q__n fc-good">{{ overview.triage.file_ok }}</div><div class="fc-q__l">file ok</div></div>
        <div class="fc-q"><div class="fc-q__n">{{ overview.triage.unclassified }}</div><div class="fc-q__l">unprobed</div></div>
      </div>

      <p v-if="classSummary" class="fc-muted text-caption mb-3">
        Reasons: {{ classSummary }}
      </p>

      <div class="d-flex mb-4" style="gap:8px">
        <v-btn
          size="small" color="accent" variant="tonal" rounded="pill"
          prepend-icon="mdi-magnify-scan" :loading="probing"
          :disabled="!overview.triage.unclassified" @click="onProbe"
        >Probe unclassified now</v-btn>
        <v-btn
          size="small" variant="text" rounded="pill"
          prepend-icon="mdi-refresh" @click="refresh"
        >Refresh</v-btn>
      </div>

      <template v-if="defects.length">
        <div class="fc-section-h mb-2">Defective originals</div>
        <div v-for="it in defects" :key="it.job_id" class="fc-defect mb-2">
          <a :href="it.image_url" target="_blank" rel="noopener" class="fc-defect__thumb">
            <img v-if="it.thumbnail_url" :src="it.thumbnail_url" alt="">
            <v-icon v-else icon="mdi-file-question" size="28" />
          </a>
          <div class="fc-defect__meta">
            <div class="text-body-2">
              image <b>{{ it.image_id }}</b> · {{ it.task }} ·
              <span class="fc-weak">{{ it.integrity_status }}</span>
            </div>
            <div class="fc-muted text-caption fc-defect__err" :title="it.error || ''">
              {{ it.error || 'no stored reason' }}
            </div>
          </div>
          <v-btn
            v-if="recovered[it.image_id] !== 'no_source'"
            size="small" color="accent" variant="tonal" rounded="pill"
            prepend-icon="mdi-cloud-download" :loading="recovering === it.image_id"
            @click="onRecover(it)"
          >Recover</v-btn>
          <span v-else class="fc-muted text-caption">
            no pollable source — replace the file manually
          </span>
        </div>
        <p class="fc-muted text-caption mt-2 mb-0">
          Recover deletes the bad copy (and its record) and re-checks its
          subscription source, so a fresh download re-imports it and re-enters
          processing. Files without a pollable source need manual replacement.
        </p>
      </template>
      <p v-else-if="!overview.total" class="fc-muted text-body-2 mb-0">
        No failed jobs — the pipeline is clean.
      </p>
      <p v-else-if="!overview.triage.unclassified" class="fc-muted text-body-2 mb-0">
        No defective files — every probed failure was operational
        (file&nbsp;OK). Requeue them from the GPU agent card.
      </p>
    </template>
  </MaintenanceTile>
</template>

<script setup>
import { computed, onMounted, ref } from 'vue'

import { toast } from '../../utils/toast.js'
import MaintenanceTile from '../common/MaintenanceTile.vue'
import { useGpuStore } from '../../stores/gpu.js'

const store = useGpuStore()
const loading = ref(true)
const overview = ref(null)
const probing = ref(false)
const recovering = ref(null)
// image_id -> 'no_source' for rows recovery already declined; keeps the
// verdict visible instead of a button that fails the same way again.
const recovered = ref({})

const defects = computed(() =>
  (overview.value?.items || []).filter((i) => i.triage_status === 'defect'))

const classSummary = computed(() => {
  const bc = overview.value?.by_class || {}
  return Object.entries(bc)
    .sort((a, b) => b[1] - a[1])
    .map(([k, n]) => `${k.replaceAll('_', ' ')} ${n}`)
    .join(' · ')
})

onMounted(refresh)

async function refresh() {
  loading.value = true
  try {
    overview.value = await store.errors()
  } catch (e) {
    toast({ text: `Could not load failed jobs: ${e.message}`, type: 'error' })
  } finally {
    loading.value = false
  }
}

async function onProbe() {
  probing.value = true
  try {
    await store.triageErrors()
    toast({ text: 'Probe queued — verdicts appear here as files are checked (large videos take a while)', type: 'success' })
  } catch (e) {
    toast({ text: `Could not start the probe: ${e.message}`, type: 'error' })
  } finally {
    probing.value = false
  }
}

async function onRecover(it) {
  recovering.value = it.image_id
  try {
    const res = await store.recoverImage(it.image_id)
    if (res.status === 'refetch_queued') {
      toast({ text: `Deleted the bad copy and queued a re-check of source #${res.source_id} — it re-imports on the next fetch`, type: 'success' })
      await refresh()
    } else if (res.status === 'no_source') {
      recovered.value = { ...recovered.value, [it.image_id]: 'no_source' }
      toast({ text: 'No enabled subscription source covers this file — replace it manually', type: 'warning' })
    } else {
      toast({ text: 'Image record no longer exists — refreshing', type: 'warning' })
      await refresh()
    }
  } catch (e) {
    toast({ text: `Recovery failed: ${e.message}`, type: 'error' })
  } finally {
    recovering.value = null
  }
}
</script>

<style scoped>
.fc-queue { display: flex; gap: 24px; }
.fc-q__n {
  font-size: 20px; font-weight: 700; line-height: 1.1;
  font-family: 'JetBrains Mono', monospace;
}
.fc-q__l {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em;
  color: rgb(var(--v-theme-on-surface-variant));
}
.fc-defect {
  display: flex; align-items: center; gap: 12px;
  background: rgb(var(--v-theme-surface-light)); border-radius: 8px;
  padding: 6px 10px;
}
.fc-defect__thumb {
  flex: 0 0 44px; width: 44px; height: 44px; border-radius: 6px;
  overflow: hidden; display: flex; align-items: center; justify-content: center;
  background: rgba(0, 0, 0, 0.25);
}
.fc-defect__thumb img { width: 100%; height: 100%; object-fit: cover; }
.fc-defect__meta { flex: 1; min-width: 0; }
.fc-defect__err {
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
</style>
