<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 || item.resultId)" 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, getSplitResultDownloadUrl, 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()
  const url = item.downloadUrl || (item.resultId ? getSplitResultDownloadUrl(item.resultId) : '')
  if (!url) {
    ElMessage.warning('当前结果没有下载地址')
    return
  }

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

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>
