<template>
  <div class="file-page animate-in">
    <div class="page-header">
      <div class="header-left">
        <h3>表格处理</h3>
        <el-tag type="info" size="small">共 {{ total }} 个</el-tag>
      </div>
      <div class="header-actions">
        <el-button @click="triggerUpload">上传Excel</el-button>
        <el-button type="primary" :disabled="!selected.length" @click="batchProcess">
          批量处理 ({{ selected.length }})
        </el-button>
        <el-button :disabled="!selected.length" @click="batchDelete">
          批量删除
        </el-button>
        <el-button :disabled="!selected.length" @click="resetCache">
          清除处理缓存
        </el-button>
        <el-button type="danger" @click="clearAll">
          删除全部
        </el-button>
        <input
          ref="uploadInput"
          type="file"
          multiple
          accept=".xls,.xlsx"
          hidden
          @change="handleUpload"
        />
      </div>
    </div>

    <el-table
      :data="items"
      v-loading="loading"
      @selection-change="onSelect"
      @sort-change="onSortChange"
      stripe
      style="width: 100%"
    >
      <el-table-column type="selection" width="45" />
      <el-table-column label="Excel处理文件" min-width="200">
        <template #default="{ row }">
          <span class="file-name primary">{{ row.output_excel || '--' }}</span>
        </template>
      </el-table-column>
      <el-table-column label="" width="40" align="center">
        <template #default="{ row }">
          <el-icon :color="row.result_exists ? '#52C41A' : '#d1d5db'" :size="16">
            <Right />
          </el-icon>
        </template>
      </el-table-column>
      <el-table-column label="采购单文件" min-width="180">
        <template #default="{ row }">
          <span class="file-name secondary">{{ row.result_purchase || '--' }}</span>
        </template>
      </el-table-column>
      <el-table-column label="" width="40" align="center">
        <template #default="{ row }">
          <el-icon :color="row.input_exists ? '#52C41A' : '#d1d5db'" :size="16">
            <Right />
          </el-icon>
        </template>
      </el-table-column>
      <el-table-column label="Input图片" min-width="180">
        <template #default="{ row }">
          <span class="file-name secondary">{{ row.input_image || '--' }}</span>
        </template>
      </el-table-column>
      <el-table-column label="状态" width="100" align="center">
        <template #default="{ row }">
          <el-tag :type="statusType(row.status)" size="small">{{ statusText(row.status) }}</el-tag>
        </template>
      </el-table-column>
      <el-table-column label="创建时间" width="170" align="center" sortable="custom" prop="created_at">
        <template #default="{ row }">
          <span class="time-text">{{ fmtTime(row.created_at) }}</span>
        </template>
      </el-table-column>
      <el-table-column label="操作" width="320" fixed="right">
        <template #default="{ row }">
          <el-button link type="primary" size="small" @click="previewFile(row)">预览</el-button>
          <el-button link type="primary" size="small" @click="showDetail(row)">详情</el-button>
          <el-button link type="primary" size="small" @click="downloadFile(row)">下载</el-button>
          <el-button link type="primary" size="small" @click="processFile(row)">处理</el-button>
          <el-button link type="danger" size="small" @click="deleteFile(row)">删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <el-dialog v-model="showPreview" title="文件预览" width="75%" append-to-body :close-on-click-modal="false" class="preview-dialog" @close="cleanupPreview">
      <div class="preview-body">
        <div v-if="previewType === 'image'" class="preview-image-wrap"><img :src="previewSrc" style="max-width:100%;max-height:100%;object-fit:contain" /></div>
        <div v-else-if="previewType === 'excel'" class="preview-table-wrap"><table class="preview-table"><tr v-for="(row, ri) in previewRows" :key="ri"><td v-for="(cell, ci) in row" :key="ci">{{ cell }}</td></tr></table></div>
      </div>
    </el-dialog>

    <el-dialog v-model="showDetailDlg" title="处理详情" width="75%" append-to-body :close-on-click-modal="false" class="preview-dialog">
      <div class="preview-body">
        <div class="detail-logs">
          <div v-if="detailLogs.length === 0" style="text-align:center;color:var(--text-muted);padding:40px">暂无该文件的处理日志</div>
          <div v-for="(line, i) in detailLogs" :key="i" class="detail-line" :class="{err: line.includes('失败')||line.includes('错误'), ok: line.includes('完成')}">{{ line }}</div>
        </div>
      </div>
    </el-dialog>

    <div class="pagination-wrap">
      <el-pagination
        v-model:current-page="page"
        :page-size="pageSize"
        :total="total"
        layout="total, prev, pager, next"
        @current-change="loadData"
      />
    </div>
  </div>
</template>

<script setup lang="ts">
import { ref, onMounted } from 'vue'
import { ElMessage, ElMessageBox } from 'element-plus'
import { Right } from '@element-plus/icons-vue'
import { useProcessingStore } from '../../stores/processing'
import { statusType, statusText, fmtTime } from '../../composables/useFileUtils'
import { useFilePreview } from '../../composables/useFilePreview'
import api from '../../api'

const processingStore = useProcessingStore()
const { showPreview, previewType, previewSrc, previewRows, openPreview, cleanupPreview } = useFilePreview()

const items = ref<any[]>([])
const total = ref(0)
const page = ref(1)
const pageSize = 50
const loading = ref(true)
const selected = ref<any[]>([])
const sortBy = ref('created_at')
const sortOrder = ref('desc')
const uploadInput = ref<HTMLInputElement>()

const showDetailDlg = ref(false)
const detailLogs = ref<string[]>([])

async function loadData() {
  loading.value = true
  try {
    const res = await api.get('/files/relations', { params: { view: 'tables', page: page.value, page_size: pageSize, sort_by: sortBy.value, sort_order: sortOrder.value } })
    items.value = res.data.items
    total.value = res.data.total
  } catch {
    ElMessage.error('加载文件列表失败')
  } finally {
    loading.value = false
  }
}

function onSelect(rows: any[]) { selected.value = rows }

async function previewFile(row: any) {
  const fname = row.output_excel || row.result_purchase || row.input_image
  const dir = row.output_excel ? 'output' : row.result_purchase ? 'result' : 'input'
  await openPreview(dir, fname)
}

function showDetail(row: any) {
  const fname = row.output_excel || row.result_purchase || row.input_image
  const stem = fname.replace(/\.[^.]+$/, '')
  detailLogs.value = (processingStore.logs || []).filter((l: string) => l.includes(fname) || l.includes(stem))
  showDetailDlg.value = true
}

function onSortChange({ prop, order }: any) {
  if (prop === 'created_at') {
    sortBy.value = 'created_at'
    sortOrder.value = order === 'ascending' ? 'asc' : 'desc'
  } else {
    sortBy.value = ''
    sortOrder.value = 'desc'
  }
  loadData()
}

function triggerUpload() {
  uploadInput.value?.click()
}

async function handleUpload(e: Event) {
  const el = e.target as HTMLInputElement
  if (!el.files || !el.files.length) return
  for (const file of Array.from(el.files)) {
    const fd = new FormData()
    fd.append('file', file)
    try {
      await api.post('/files/upload?target=output', fd)
      ElMessage.success(`已上传: ${file.name}`)
    } catch (err: any) {
      ElMessage.error(`上传失败: ${file.name}`)
    }
  }
  el.value = ''
  loadData()
}

async function processFile(row: any) {
  try {
    const res = await api.post('/processing/excel-single', { filename: row.output_excel })
    ElMessage.success(`处理任务已创建: ${res.data.task_id}`)
  } catch (err: any) {
    ElMessage.error(err.response?.data?.detail || '处理失败')
  }
}

async function downloadFile(row: any) {
  const token = localStorage.getItem('token')
  if (row.output_excel) {
    window.open(`/api/files/download/output/${encodeURIComponent(row.output_excel)}?token=${token}`, '_blank')
  } else if (row.result_purchase) {
    window.open(`/api/files/download/result/${encodeURIComponent(row.result_purchase)}?token=${token}`, '_blank')
  }
}

async function deleteFile(row: any) {
  try {
    await ElMessageBox.confirm(`确定删除 ${row.output_excel}？`, '确认')
    await api.delete(`/files/output/${encodeURIComponent(row.output_excel)}`)
    if (row.id) await api.delete('/files/relations', { data: { ids: [row.id] } })
    ElMessage.success('已删除')
    loadData()
  } catch (err: any) {
    if (err !== 'cancel') ElMessage.error('删除失败')
  }
}

async function batchProcess() {
  try {
    const filenames = selected.value.map(r => r.output_excel).filter(Boolean)
    const res = await api.post('/processing/excel', { files: filenames })
    ElMessage.success(`批量处理任务已创建: ${res.data.task_id}`)
  } catch (err: any) {
    ElMessage.error(err.response?.data?.detail || '处理失败')
  }
}

async function batchDelete() {
  try {
    await ElMessageBox.confirm(`确定删除选中的 ${selected.value.length} 个文件？`, '确认')
    const files = selected.value
      .filter(r => r.output_excel)
      .map(r => ({ directory: 'output', filename: r.output_excel }))
    const res = await api.post('/files/batch-delete', { files })
    if (res.data.errors?.length) {
      ElMessage.warning(`删除完成，${res.data.errors.length} 个文件失败`)
    } else {
      ElMessage.success('批量删除完成')
    }
    loadData()
  } catch (err: any) {
    if (err !== 'cancel') ElMessage.error('批量删除失败')
  }
}

async function resetCache() {
  try {
    await ElMessageBox.confirm(`确定清除选中的 ${selected.value.length} 个文件的处理缓存？删除后可重新处理。`, '确认')
    const files = selected.value.map(r => ({
      input_image: r.input_image,
      output_excel: r.output_excel,
      result_purchase: r.result_purchase,
    }))
    const res = await api.post('/files/reset-cache', { files })
    ElMessage.success(`已清除 ${res.data.deleted_files} 个缓存文件`)
    loadData()
  } catch (err: any) {
    if (err !== 'cancel') ElMessage.error('清除缓存失败')
  }
}

async function clearAll() {
  try {
    await ElMessageBox.confirm('确定清空所有 Excel 处理文件？此操作不可恢复。', '确认')
    await api.post('/files/clear/output')
    await api.post('/files/relations/sync')
    ElMessage.success('已清空')
    loadData()
  } catch (err: any) {
    if (err !== 'cancel') ElMessage.error('清空失败')
  }
}

onMounted(loadData)
</script>

<style scoped>
.file-page {
  width: 100%;
}
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}
.header-left h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}
.header-actions {
  display: flex;
  gap: 8px;
}
.file-name.primary {
  font-weight: 600;
  color: var(--text-primary);
}
.file-name.secondary {
  color: var(--text-muted);
  font-size: 13px;
}
.time-text {
  font-size: 13px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}
.pagination-wrap {
  display: flex;
  justify-content: flex-end;
  margin-top: 16px;
}

.preview-table td { border:1px solid var(--border-light);padding:4px 8px;white-space:nowrap;max-width:200px;overflow:hidden;text-overflow:ellipsis }
.preview-table tr:nth-child(even) { background:#fafafa }
.preview-table tr:first-child { background:#f0f0f0;font-weight:600 }
.detail-logs { max-height:60vh;overflow-y:auto;background:#09090b;border-radius:8px;padding:14px;font-family:var(--font-mono);font-size:12px;line-height:1.8 }
.detail-line { color:#a1a1aa }
.detail-line.err { color:#ef4444 }
.detail-line.ok { color:#22c55e }
:global(.preview-dialog.el-dialog.is-fullscreen) { display:flex;flex-direction:column;width:96vw;height:94vh;margin:3vh 2vw;border-radius:12px!important }
:global(.preview-dialog.el-dialog.is-fullscreen) .el-dialog__header { flex-shrink:0 }
:global(.preview-dialog.el-dialog.is-fullscreen) .el-dialog__body { flex:1;min-height:0;padding:8px 16px 16px;overflow:hidden;display:flex;flex-direction:column }
.preview-body { flex:1;min-height:0;display:flex;flex-direction:column }
.preview-image-wrap { flex:1;display:flex;align-items:center;justify-content:center;min-height:0 }
.preview-table-wrap { flex:1;overflow:auto;min-height:0;border:1px solid var(--border-light);border-radius:8px }
.preview-table { border-collapse:collapse;font-size:12px;width:100% }

/* ── Responsive ── */
@media (max-width: 768px) {
  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .header-actions {
    flex-wrap: wrap;
    gap: 6px;
  }
  .header-actions .el-button {
    font-size: 12px;
  }
}
</style>
