<template>
  <div class="page-shell module-page">
    <BrandTopBar active="split" />

    <div class="main-content">
      <aside class="left-panel">
      <div class="section-title">选择文件</div>
      <div class="upload-zone">
        <div class="hint">选择需要拆分的 Excel 文件或文件夹，按规则拆成多个 Excel 文件。</div>
        <div class="btns">
          <button type="button" class="opt-btn" @click="selectSplitFiles">选择 Excel 文件</button>
          <button type="button" class="opt-btn" @click="selectSplitFolder">选择文件夹</button>
        </div>

        <div class="selected-files clean-placeholder split-selected-files">
          <template v-if="splitSelectedPaths.length">
            <span v-for="path in splitDisplayPaths" :key="path">{{ path }}</span>
            <span v-if="splitSelectedPaths.length > splitDisplayPaths.length" class="more-line">
              还有 {{ splitSelectedPaths.length - splitDisplayPaths.length }} 个文件未展开显示
            </span>
          </template>
          <span v-else>暂未选择待拆分文件</span>
        </div>
      </div>

      <div class="section-title">保留列设置</div>
      <div class="option-group column-option-group">
        <div class="column-toolbar">
          <span class="column-count">已选择 {{ splitSelectedColumns.length }} / {{ splitAvailableColumns.length }} 列</span>
          <div class="column-actions">
            <button type="button" class="opt-btn small" @click="splitSelectedColumns = [...splitAvailableColumns]">全选</button>
            <button type="button" class="opt-btn small" @click="splitSelectedColumns = []">清空</button>
          </div>
        </div>

        <div class="column-grid" v-if="splitAvailableColumns.length">
          <label
            v-for="column in splitAvailableColumns"
            :key="column"
            class="column-item"
            :class="{ active: splitSelectedColumns.includes(column) }"
          >
            <input v-model="splitSelectedColumns" type="checkbox" :value="column" />
            <span>{{ column }}</span>
          </label>
        </div>
        <div v-else class="empty-column-state">请选择 Excel 文件后读取表头并填充可保留列</div>
      </div>

      <div class="section-title">总条数</div>
      <div class="option-group">
        <label class="radio-item active">
          <input type="checkbox" checked disabled />
          <div>
            <span class="label">当前数据总条数</span>
            <div class="desc">{{ splitTotalRows }} 条（不含表头）</div>
          </div>
        </label>
      </div>

      <div class="section-title">拆分模式</div>
      <div class="option-group">
        <label class="radio-item" :class="{ active: splitMode === 'rows_per_file' }">
          <input v-model="splitMode" type="radio" value="rows_per_file" name="split-mode" />
          <div>
            <span class="label">按每份条数</span>
            <div class="desc">例如每份 2000 条，最后一份放剩余数据</div>
          </div>
        </label>
        <label class="radio-item" :class="{ active: splitMode === 'parts' }">
          <input v-model="splitMode" type="radio" value="parts" name="split-mode" />
          <div>
            <span class="label">按份数平均拆分</span>
            <div class="desc">例如拆 5 份，按总条数尽量平均分配</div>
          </div>
        </label>
      </div>

      <div class="section-title">拆分参数</div>
      <div class="option-group">
        <label v-if="splitMode === 'rows_per_file'" class="split-input-card">
          <span class="label">每份条数</span>
          <input v-model.number="splitRowsPerFile" class="split-number-input" type="number" min="1" placeholder="例如 2000" />
        </label>
        <label v-else class="split-input-card">
          <span class="label">拆分份数</span>
          <input v-model.number="splitParts" class="split-number-input" type="number" min="1" placeholder="例如 5" />
        </label>
      </div>

      <div class="run-row">
        <button type="button" class="btn-run" :disabled="splitRunning" @click="submitSplitRun">
          {{ splitRunning ? '拆分中...' : '开始拆分' }}
        </button>
        <span class="loading-msg">
          {{ splitRunning ? '正在拆分并上传结果，请稍候…' : '选择文件、保留列和拆分规则后即可执行拆分，结果会显示在右侧供下载' }}
        </span>
      </div>
    </aside>

    <section class="right-panel">
      <div class="panel-header">拆分结果</div>
      <div class="task-list-wrap">
        <div class="clean-result-summary">
          <div class="summary-card">
            <span class="summary-label">已处理文件</span>
            <strong>{{ splitSummary.total }}</strong>
          </div>
          <div class="summary-card">
            <span class="summary-label">成功结果</span>
            <strong>{{ splitSummary.successCount }}</strong>
          </div>
          <div class="summary-card">
            <span class="summary-label">失败文件</span>
            <strong>{{ splitSummary.failedCount }}</strong>
          </div>
        </div>

        <div class="result-list-wrap">
          <div class="result-list-header">
            <span>拆分结果压缩包列表</span>
          </div>

          <div v-if="splitResultItems.length === 0" class="empty-tasks">
            暂无拆分结果，完成数据拆分后会在这里展示压缩包文件
          </div>

          <ul v-else class="task-list clean-result-list">
            <li v-for="item in splitResultItems" :key="`${item.resultId || item.outputFilename || item.sourceFilename}-${item.rowCount || 0}`" class="task-item split-result-item">
              <div class="left split-result-main">
                <span class="id" :title="item.sourceFilename">{{ item.sourceFilename || '-' }}</span>
                <div v-if="item.outputFilename" class="files">压缩包文件：{{ item.outputFilename }}</div>
                <div v-if="item.rowCount !== undefined" class="time">压缩包共包含 {{ item.rowCount }} 条数据</div>
                <div v-if="item.entryCount && item.entryCount > 0" class="files">压缩包内共 {{ item.entryCount }} 个拆分文件</div>
                <div v-if="item.entries && item.entries.length" class="files split-entry-list">
                  压缩包内容：{{ formatSplitEntries(item.entries) }}
                </div>
                <div v-if="item.error" class="files">错误信息：{{ item.error }}</div>
              </div>

              <div class="task-right split-result-actions">
                <span class="status" :class="item.success ? 'success' : 'failed'">
                  {{ item.success ? '已完成' : '失败' }}
                </span>
                <button
                  v-if="item.success && item.downloadUrl"
                  type="button"
                  class="download"
                  @click="downloadSplitResult(item)"
                >
                  下载压缩包
                </button>
                <button
                  v-if="item.resultId"
                  type="button"
                  class="btn-delete"
                  @click="deleteSplitHistoryRecord(item.resultId)"
                >
                  删除
                </button>
              </div>
            </li>
          </ul>
        </div>
      </div>
    </section>
    </div>
  </div>
</template>

<script setup lang="ts">
import { computed, onMounted, ref } from 'vue'
import { ElMessage } from 'element-plus'
import BrandTopBar from './BrandTopBar.vue'
import { expandBrandFolderRecursive, type BrandExpandFolderItem } from '@/shared/api/brand'
import { deleteSplitHistory, getExcelInfo, getSplitHistory, runSplit, type SplitResultItem, type SplitRunVo } from '@/shared/api/java-modules'
import { getPywebviewApi, type UploadedJavaFile } from '@/shared/bridges/pywebview'

const splitSelectedPaths = ref<string[]>([])
const splitArchiveName = ref('')
const splitUploadedFiles = ref<UploadedJavaFile[]>([])
const splitAvailableColumns = ref<string[]>([])
const splitSelectedColumns = ref<string[]>([])
const splitTotalRows = ref(0)
const splitMode = ref<'rows_per_file' | 'parts'>('rows_per_file')
const splitRowsPerFile = ref<number | null>(2000)
const splitParts = ref<number | null>(5)
const splitRunning = ref(false)
const splitResultItems = ref<SplitResultItem[]>([])
const splitSummary = ref<SplitRunVo>({ total: 0, successCount: 0, failedCount: 0, items: [] })
const splitDisplayPaths = computed(() => splitSelectedPaths.value.slice(0, 8))

function updateSplitSummaryFromItems(items: SplitResultItem[]) {
  splitSummary.value = {
    total: items.length,
    successCount: items.filter((item) => item.success).length,
    failedCount: items.filter((item) => !item.success).length,
    items,
  }
}

async function uploadPathsToJava(paths: Array<string | BrandExpandFolderItem>) {
  const api = getPywebviewApi()
  if (!api?.upload_file_to_java) {
    throw new Error('当前桌面端未提供文件上传桥接能力')
  }
  const uploaded: UploadedJavaFile[] = []
  for (const item of paths) {
    const filePath = typeof item === 'string' ? item : item.absolutePath
    const relativePath = typeof item === 'string' ? undefined : item.relativePath
    const result = await api.upload_file_to_java(filePath, relativePath)
    if (!result?.success || !result.data) {
      throw new Error(result?.error || result?.message || `上传失败：${filePath}`)
    }
    uploaded.push(result.data)
  }
  return uploaded
}

async function loadSplitInfo(fileKey: string) {
  const result = await getExcelInfo(fileKey)
  splitAvailableColumns.value = result.headers || []
  splitSelectedColumns.value = [...(result.headers || [])]
  splitTotalRows.value = result.totalRows || 0
}

async function handleSelectedPaths(paths: string[], successMessage: string) {
  splitSelectedPaths.value = paths
  splitArchiveName.value = ''
  splitUploadedFiles.value = await uploadPathsToJava(paths)
  if (splitUploadedFiles.value.length > 0) {
    await loadSplitInfo(splitUploadedFiles.value[0].fileKey)
  }
  ElMessage.success(successMessage)
}

async function selectSplitFiles() {
  const api = getPywebviewApi()
  if (!api?.select_brand_xlsx_files) {
    ElMessage.warning('当前环境不支持文件选择，请在本机客户端中打开')
    return
  }

  try {
    const paths = await api.select_brand_xlsx_files()
    if (!paths?.length) return
    await handleSelectedPaths(paths, `已选择 ${paths.length} 个待拆分文件`)
  } catch (error) {
    ElMessage.error(error instanceof Error ? error.message : '选择失败')
  }
}

async function selectSplitFolder() {
  const api = getPywebviewApi()
  if (!api?.select_brand_folder) {
    ElMessage.warning('当前环境不支持文件夹选择，请在本机客户端中打开')
    return
  }

  try {
    const folder = await api.select_brand_folder()
    if (!folder) return
    splitArchiveName.value = folder.split(/[/\\]/).filter(Boolean).pop() || ''

    const result = await expandBrandFolderRecursive(folder)
    if (result.success && result.items?.length) {
      splitSelectedPaths.value = result.items.map((item) => item.relativePath)
      splitUploadedFiles.value = await uploadPathsToJava(result.items)
      if (splitUploadedFiles.value.length > 0) {
        await loadSplitInfo(splitUploadedFiles.value[0].fileKey)
      }
      ElMessage.success(`已选择文件夹内 ${result.items.length} 个 xlsx 文件`)
      return
    }

    ElMessage.warning(result.error || '该文件夹下没有 xlsx 文件')
  } catch (error) {
    ElMessage.error(error instanceof Error ? error.message : '选择失败')
  }
}

async function submitSplitRun() {
  if (!splitUploadedFiles.value.length) {
    ElMessage.warning('请先选择待拆分 Excel 文件或文件夹')
    return
  }
  if (!splitSelectedColumns.value.length) {
    ElMessage.warning('请至少选择一列保留列')
    return
  }
  if (splitMode.value === 'rows_per_file' && (!splitRowsPerFile.value || splitRowsPerFile.value <= 0)) {
    ElMessage.warning('请输入有效的每份条数')
    return
  }
  if (splitMode.value === 'parts' && (!splitParts.value || splitParts.value <= 0)) {
    ElMessage.warning('请输入有效的拆分份数')
    return
  }

  try {
    splitRunning.value = true
    const result = await runSplit({
      files: splitUploadedFiles.value.map((item) => ({ fileKey: item.fileKey, originalFilename: item.originalFilename, relativePath: item.relativePath })),
      selectedColumns: splitSelectedColumns.value,
      splitMode: splitMode.value,
      rowsPerFile: splitMode.value === 'rows_per_file' ? splitRowsPerFile.value || undefined : undefined,
      parts: splitMode.value === 'parts' ? splitParts.value || undefined : undefined,
      archiveName:
        splitUploadedFiles.value.some((item) => !!item.relativePath) && splitArchiveName.value
          ? splitArchiveName.value
          : undefined,
    })
    splitSummary.value = result
    splitResultItems.value = result.items || []
    await loadSplitHistory()
    ElMessage.success('数据拆分完成')
  } catch (error) {
    ElMessage.error(error instanceof Error ? error.message : '数据拆分失败')
  } finally {
    splitRunning.value = false
  }
}

async function loadSplitHistory() {
  try {
    const response = await getSplitHistory()
    splitResultItems.value = response.items || []
    updateSplitSummaryFromItems(splitResultItems.value)
  } catch {
    // ignore history load errors
  }
}

async function deleteSplitHistoryRecord(resultId: number) {
  try {
    await deleteSplitHistory(resultId)
    await loadSplitHistory()
    ElMessage.success('已删除')
  } catch (error) {
    ElMessage.error(error instanceof Error ? error.message : '删除失败')
  }
}

function formatSplitEntries(entries: NonNullable<SplitResultItem['entries']>) {
  const preview = entries.slice(0, 4).map((entry) => {
    if (entry.rowCount !== undefined) {
      return `${entry.filename}（${entry.rowCount}条）`
    }
    return entry.filename
  })
  const hiddenCount = entries.length - preview.length
  return hiddenCount > 0 ? `${preview.join('、')} 等 ${entries.length} 个文件` : preview.join('、')
}

async function downloadSplitResult(item: SplitResultItem) {
  const api = getPywebviewApi()
  if (!item.downloadUrl) {
    ElMessage.warning('当前结果没有下载地址')
    return
  }

  const filename = item.outputFilename || `${new Date().toISOString().slice(0, 10).replace(/-/g, '')}.zip`
  if (api?.save_file_from_url) {
    const result = await api.save_file_from_url(item.downloadUrl, filename)
    if (result.success) {
      ElMessage.success(`已保存：${result.path || filename}`)
    } else if (result.error && result.error !== '用户取消') {
      ElMessage.error(result.error)
    }
    return
  }

  window.open(item.downloadUrl, '_blank')
}

onMounted(() => {
  loadSplitHistory().catch(() => undefined)
})
</script>

<style scoped>
.module-page { min-height: 100vh; background: #1a1a1a; }
.main-content { display: flex; min-height: calc(100vh - 56px); height: calc(100vh - 56px); }
.left-panel { width: 380px; background: #1e1e1e; padding: 20px; overflow-y: auto; border-right: 1px solid #2a2a2a; }
.right-panel { flex: 1; display: flex; flex-direction: column; min-width: 0; background: #1a1a1a; }
.section-title { font-size: 13px; color: #bbb; margin-bottom: 10px; }
.upload-zone { border: 1px dashed #3a3a3a; border-radius: 10px; padding: 24px; text-align: center; background: #252525; margin-bottom: 20px; transition: all 0.2s ease; }
.upload-zone:hover { border-color: #3498db; background: #2a2a2a; }
.hint { color: #888; font-size: 13px; margin-bottom: 12px; line-height: 1.5; }
.btns { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.opt-btn, .btn-run, .download, .btn-delete { border: none; cursor: pointer; transition: all 0.2s ease; }
.opt-btn { padding: 8px 16px; font-size: 13px; color: #ccc; background: #2a2a2a; border: 1px solid #3a3a3a; border-radius: 6px; }
.opt-btn.small { padding: 6px 10px; font-size: 12px; }
.opt-btn:hover { color: #3498db; background: #333; border-color: #3498db; }
.selected-files { margin-top: 14px; font-size: 12px; color: #888; max-height: 112px; overflow-y: auto; text-align: left; }
.selected-files span { display: block; margin: 4px 0; word-break: break-all; }
.more-line { color: #b8c1cc; }
.split-selected-files { max-height: 120px; min-height: 72px; padding-right: 4px; }
.option-group { margin-bottom: 20px; }
.column-option-group { padding: 14px; border-radius: 10px; background: #252525; border: 1px solid #2a2a2a; }
.column-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.column-count { font-size: 12px; color: #a9b4bf; }
.column-actions { display: flex; gap: 8px; }
.column-grid { display: grid; grid-template-columns: 1fr; gap: 8px; max-height: 280px; overflow-y: auto; }
.empty-column-state { padding: 16px 12px; border-radius: 8px; border: 1px dashed #3a3a3a; background: #202020; color: #7f8790; font-size: 12px; line-height: 1.6; }
.column-item { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 8px; border: 1px solid #2f2f2f; background: #202020; cursor: pointer; transition: all 0.2s ease; font-size: 13px; color: #d7d7d7; }
.column-item:hover, .column-item.active { border-color: #3b6f98; background: #26313a; }
.column-item input { margin: 0; }
.column-item span { word-break: break-all; }
.radio-item { display: flex; align-items: flex-start; gap: 10px; cursor: pointer; padding: 10px 12px; border-radius: 8px; background: #252525; border: 1px solid #2a2a2a; margin-bottom: 8px; transition: all 0.2s ease; }
.radio-item:hover, .radio-item.active { background: #2a2a2a; border-color: #3a3a3a; }
.radio-item input { margin-top: 3px; }
.label { font-weight: 500; color: #e0e0e0; font-size: 13px; }
.desc { font-size: 12px; color: #888; margin-top: 2px; line-height: 1.5; font-weight: 400; }
.split-input-card { display: flex; flex-direction: column; gap: 10px; padding: 14px 16px; border-radius: 10px; border: 1px solid #2f2f2f; background: #252525; }
.split-number-input { width: 100%; padding: 12px 14px; border-radius: 8px; border: 1px solid #3a3a3a; background: #1b1b1b; color: #eaf4ff; font-size: 22px; font-weight: 700; line-height: 1.2; outline: none; transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease; }
.split-number-input:focus { border-color: #3498db; box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.18); background: #20252b; }
.split-number-input::placeholder { color: #708090; font-size: 14px; font-weight: 400; }
.run-row { display: flex; align-items: center; flex-wrap: wrap; gap: 10px 12px; margin-top: 16px; }
.btn-run { padding: 10px 22px; background: #3498db; color: #fff; border-radius: 8px; font-size: 14px; }
.btn-run:hover { background: #2980b9; }
.btn-run:disabled { background: #555; color: #999; cursor: not-allowed; }
.loading-msg { color: #3498db; font-size: 13px; }
.panel-header { padding: 16px 20px; border-bottom: 1px solid #2a2a2a; font-size: 15px; font-weight: 600; color: #ddd; }
.task-list-wrap { flex: 1; overflow-y: auto; padding: 16px; }
.task-list { list-style: none; margin: 0; padding: 0; }
.task-item { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 16px; border: 1px solid #2a2a2a; border-radius: 8px; margin-bottom: 10px; background: #1e1e1e; }
.split-result-item { align-items: flex-start; }
.left { flex: 1; min-width: 0; }
.split-result-main { display: flex; flex-direction: column; gap: 4px; }
.id { display: inline-block; font-weight: 600; color: #e0e0e0; font-size: 13px; }
.files { font-size: 12px; color: #888; margin-top: 4px; }
.time { font-size: 12px; color: #666; margin-top: 2px; }
.split-entry-list { line-height: 1.6; word-break: break-all; max-width: 100%; }
.task-right { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; justify-content: flex-end; }
.split-result-actions { flex-shrink: 0; min-width: 180px; justify-content: flex-end; align-self: center; }
.status { padding: 4px 10px; border-radius: 6px; font-size: 12px; white-space: nowrap; }
.status.success { background: rgba(46, 204, 113, 0.18); color: #2ecc71; }
.status.failed { background: rgba(231, 76, 60, 0.18); color: #ff6b6b; }
.download { padding: 6px 10px; border-radius: 6px; font-size: 12px; background: rgba(52, 152, 219, 0.18); color: #69b6ff; }
.download:hover { background: rgba(52, 152, 219, 0.28); }
.btn-delete { padding: 6px 10px; border-radius: 6px; font-size: 12px; background: rgba(231, 76, 60, 0.12); color: #ff8f8f; }
.btn-delete:hover { background: rgba(231, 76, 60, 0.22); }
.empty-tasks { color: #666; font-size: 13px; padding: 24px 8px; }
.clean-placeholder { max-height: 112px; }
.clean-result-summary { display: grid; grid-template-columns: repeat(3, minmax(0, 220px)); gap: 16px; margin-bottom: 18px; }
.summary-card { padding: 16px 18px; border: 1px solid #2a2a2a; border-radius: 10px; background: #1e1e1e; }
.summary-card strong { display: block; margin-top: 8px; font-size: 24px; color: #eaf4ff; }
.summary-label { font-size: 12px; color: #8d8d8d; }
.result-list-wrap { border: 1px solid #2a2a2a; border-radius: 10px; background: #1e1e1e; min-height: 260px; }
.result-list-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 16px; border-bottom: 1px solid #2a2a2a; font-size: 14px; color: #ddd; }
@media (max-width: 1100px) { .main-content { flex-direction: column; height: auto; } .left-panel { width: 100%; border-right: none; border-bottom: 1px solid #2a2a2a; } .right-panel { min-height: 420px; } .task-item { flex-direction: column; align-items: flex-start; } .task-right { width: 100%; justify-content: flex-start; } .split-result-actions { min-width: 0; align-self: flex-start; } .clean-result-summary { grid-template-columns: 1fr; } }
</style>
