<template>
  <div class="request-page">
    <el-card class="form-card" shadow="never">
      <div slot="header" class="card-header">
        <span>出差申请</span>
        <div class="actions">
          <el-button size="mini" icon="el-icon-arrow-left" @click="$router.back()">返回</el-button>
        </div>
      </div>
      <el-form ref="formRef" :model="form" :rules="rules" label-width="120px" size="small" class="metal-form">
        <!-- 顶部摘要 -->
        <div class="form-summary">
          <div class="summary-left">
            <div class="summary-title">发起出差</div>
            <div class="summary-sub">请完善信息后提交，系统将按流程节点流转</div>
          </div>
          <div class="summary-right">
            <div class="summary-item">
              <div class="k">申请人</div>
              <div class="v">{{ currentApplicantText }}</div>
            </div>
            <div class="summary-item">
              <div class="k">目的地</div>
              <div class="v">{{ form.destination || '-' }}</div>
            </div>
          </div>
        </div>

        <el-row :gutter="14">
          <el-col :span="12">
            <el-form-item label="出差类型" prop="travelType">
              <el-select v-model="form.travelType" filterable allow-create default-first-option clearable
                placeholder="选择或输入（如：客户拜访/项目支持/培训学习）" style="width: 100%">
                <el-option v-for="t in travelTypeOptions" :key="t" :label="t" :value="t" />
              </el-select>
              <div class="hint-text">优先选择；若公司类型未配置，可直接输入</div>
            </el-form-item>
          </el-col>
        </el-row>

        <div class="block-title">绑定项目</div>
        <el-row>
          <el-col>
            <el-form-item label="项目" prop="projectId">
              <project-select v-model="form.projectId" placeholder="请选择项目" style="width: 100%" />
              <!-- <el-input v-model="form.projectId" placeholder="请输入项目ID" style="width: 100%" /> -->
            </el-form-item>
          </el-col>
        </el-row>

        <div class="block-title">出差时间</div>
        <el-row :gutter="14">
          <el-col :span="12">
            <el-form-item label="开始时间" prop="startTime">
              <el-date-picker v-model="form.startTime" type="datetime" placeholder="请选择开始时间" style="width: 100%"
                :picker-options="pickerOptions" />
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item label="结束时间" prop="endTime">
              <el-date-picker v-model="form.endTime" type="datetime" placeholder="请选择结束时间" style="width: 100%"
                :picker-options="pickerOptions" />
            </el-form-item>
          </el-col>
        </el-row>

        <el-form-item label="目的地" prop="destination">
          <el-input v-model="form.destination" placeholder="城市/地址/项目现场" />
          <div class="hint-text">请填写具体目的地，便于审批人判断出差必要性</div>
        </el-form-item>

        <div class="block-title">出差说明</div>
        <el-form-item label="事由" prop="reason">
          <el-input v-model="form.reason" type="textarea" :rows="4"
            placeholder="请说明出差的起点、终点、时间，以及出差目的、任务目标、预期成果等，便于审批人判断出差必要性，并方便购票" show-word-limit maxlength="200" />
        </el-form-item>

        <el-form-item label="交通/住宿/行程附件" prop="accessoryApplyIds">
          <file-upload v-model="form.accessoryApplyIds" :limit="8" :file-size="50"
            :file-type="['pdf', 'jpg', 'jpeg', 'png', 'doc', 'docx']" multiple />
          <div class="hint-text">上传机票、酒店、行程单等（pdf/jpg/png/doc/docx），便于审批与后续报销</div>
        </el-form-item>

        <!-- 审批方式（模板/自选审批人） -->
        <div class="block-title">审批方式</div>
        <div class="approve-mode">
          <el-radio-group v-model="approverMode" size="small" @change="onApproverModeChange">
            <el-radio-button label="template">使用模板流程</el-radio-button>
            <el-radio-button label="manual">手动选择审批人（一次审批）</el-radio-button>
          </el-radio-group>

          <div class="approve-panel">
            <div v-if="approverMode === 'template'">
              <div class="approve-row">
                <div class="k">流程模板</div>
                <div class="v">
                  <el-select v-model="tplId" size="small" clearable filterable placeholder="请选择流程模板"
                    style="width: 360px" @change="onTplChange">
                    <el-option v-for="t in availableTpls" :key="t.tplId"
                      :label="`${t.tplName}${t.version ? ' (v' + t.version + ')' : ''}`" :value="t.tplId" />
                  </el-select>
                </div>
              </div>
              <div class="hint-text">提示：选择模板后，将按模板节点自动流转（含抄送节点）。</div>
            </div>

            <div v-else>
              <div class="approve-row">
                <div class="k">审批人</div>
                <div class="v" style="max-width: 520px">
                  <el-button size="mini" type="primary" plain @click="openUserSelect">选择审批人</el-button>
                  <span style="margin-left: 10px; font-weight: 600; color: #2b2f36">
                    {{ assigneeUserName || '未选择' }}
                  </span>
                </div>
              </div>
              <div class="hint-text">提示：手动选择审批人将创建一次性审批流程，审批通过后流程立即结束。</div>
            </div>
          </div>
        </div>

        <el-form-item label="回执附件(可选)" prop="accessoryReceiptIds">
          <file-upload v-model="form.accessoryReceiptIds" :limit="8" :file-size="50"
            :file-type="['pdf', 'jpg', 'jpeg', 'png', 'doc', 'docx']" multiple />
          <div class="hint-text">可选：上传回执、发票、盖章回单等（审核/归档使用）</div>
        </el-form-item>

        <el-form-item label="备注">
          <el-input v-model="form.remark" type="textarea" :rows="2" placeholder="可选：补充说明、特殊要求等" show-word-limit
            maxlength="200" />
        </el-form-item>

        <div class="block-title">抄送</div>
        <el-form-item label="抄送目标" prop="ccUserIds">
          <el-button size="mini" type="primary" plain icon="el-icon-user" @click="openUserMultiSelect">选择抄送人</el-button>
          <div class="selected-users" v-if="ccForm.selectedUsers && ccForm.selectedUsers.length">
            <el-tag v-for="u in ccForm.selectedUsers" :key="u.userId" size="mini" closable @close="removeCcUser(u)">
              {{ u.nickName || u.userName || ('ID:' + u.userId) }}
            </el-tag>
          </div>
        </el-form-item>
        <!-- 抄送备注 -->
        <el-form-item label="抄送备注" prop="ccRemark">
          <el-input v-model="ccForm.remark" type="textarea" :rows="2" placeholder="可以填写抄送的目的或原因等信息" show-word-limit
            maxlength="200" />
        </el-form-item>
        <UserMultiSelect ref="userMultiSelect" @onSelected="onCcUsersSelected" :init="ccUserIds" />

        <!-- 提交流程提示：按“真实节点配置 / 手动一次性审批”预览 -->
        <div class="flow-preview" v-loading="flowLoading">
          <div class="flow-title">流程预览</div>
          <div class="flow-sub">
            <template v-if="approverMode === 'template'">
              <span v-if="flowTpl">当前模板：{{ flowTpl.tplName }}（v{{ flowTpl.version || 1 }}）</span>
              <span v-else>请选择流程模板</span>
            </template>
            <template v-else>
              <span>一次性审批（手动指定审批人）</span>
            </template>
          </div>

          <!-- 模板模式 -->
          <div v-if="approverMode === 'template'">
            <div v-if="flowNodes && flowNodes.length" class="flow-steps">
              <div class="flow-step">
                <div class="dot"></div>
                <div class="txt">填写申请</div>
              </div>
              <div class="line"></div>
              <div class="flow-step">
                <div class="dot"></div>
                <div class="txt">提交</div>
              </div>
              <template v-for="(n, idx) in flowNodes">
                <div class="line"></div>
                <div class="flow-step">
                  <div class="dot" :class="{ success: idx === flowNodes.length - 1 }"></div>
                  <div class="txt">{{ nodePreviewText(n, idx) }}</div>
                </div>
              </template>
            </div>
            <div v-else class="flow-fallback">
              <div class="hint-text">提示：请选择一个模板后将展示对应节点预览。</div>
            </div>
          </div>

          <!-- 手动审批模式 -->
          <div v-else class="flow-steps">
            <div class="flow-step">
              <div class="dot"></div>
              <div class="txt">填写申请</div>
            </div>
            <div class="line"></div>
            <div class="flow-step">
              <div class="dot"></div>
              <div class="txt">提交审批（{{ assigneeUserName || '请选择' }}）</div>
            </div>
            <div class="line"></div>
            <div class="flow-step">
              <div class="dot success"></div>
              <div class="txt">审批结束</div>
            </div>
          </div>
        </div>

        <div class="form-actions">
          <el-button @click="$router.back()">取消</el-button>
          <el-button type="primary" :loading="submitting" @click="submit">提交申请</el-button>
        </div>

        <!-- 用户选择组件始终挂载 -->
        <UserSelect ref="userSelect" @onSelected="onUserSelected" />

      </el-form>
    </el-card>
  </div>
</template>

<script>
import { addTravelReq } from '@/api/hrm'
import { getEmployeeByUserId } from '@/api/hrm/employee'
import { ccFlowTask, listFlowNode, listFlowTemplate } from '@/api/hrm/flow'
import FileUpload from '@/components/FileUpload'
import UserMultiSelect from '@/components/UserSelect/multi.vue'
import UserSelect from '@/components/UserSelect/single.vue'

export default {
  name: 'HrmTravelRequest',
  components: {
    UserSelect,
    FileUpload,
    UserMultiSelect
  },
  data () {
    return {
      currentEmp: null,
      submitting: false,
      flowLoading: false,
      flowTpl: null,
      flowNodes: [],
      approverMode: 'template',
      availableTpls: [],
      tplId: null,
      assigneeUserId: null,
      assigneeUserName: '',
      travelTypeOptions: ['客户拜访', '项目支持', '培训学习', '会议会展', '验收交付', '其他'],
      pickerOptions: { disabledDate: () => false },
      form: {
        empId: '',
        travelType: '',
        startTime: '',
        endTime: '',
        destination: '',
        reason: '',
        accessoryApplyIds: '',
        accessoryReceiptIds: '',
        payeeName: '',
        estimatedCost: 0,
        bankName: '',
        bankAccount: '',
        remark: ''
      },
      ccForm: {
        selectedUsers: [{
          userId: '1859252208375152641',
          nickName: '高伟',
          userName: 'gaowei'
        }, {
          userId: '1905076022886969346',
          nickName: '高桂松',
          userName: 'gaoguisong'
        }],
        remark: ''
      },
      rules: {
        travelType: [{ required: true, message: '请选择/输入出差类型', trigger: 'change' }],
        startTime: [{ required: true, message: '请选择开始时间', trigger: 'change' }],
        endTime: [{ required: true, message: '请选择结束时间', trigger: 'change' }],
        destination: [{ required: true, message: '请输入目的地', trigger: 'blur' }],
        reason: [{ required: true, message: '请输入事由', trigger: 'blur' }],
        // accessoryApplyIds: [{ required: true, message: '请上传交通/住宿/行程附件', trigger: 'change' }],
        payeeName: [{ required: true, message: '请输入收款人', trigger: 'blur' }],
        bankName: [{ required: true, message: '请输入开户行', trigger: 'blur' }],
        bankAccount: [{ required: true, message: '请输入银行账号', trigger: 'blur' }]
      }
    }
  },
  created () {
    this.loadCurrentEmployee()
    this.loadTemplates()
  },
  computed: {
    currentApplicantText () {
      if (this.currentEmp) return this.formatEmpLabel(this.currentEmp)
      const user = this.$store?.state?.user || {}
      return user.nickName || user.userName || '加载中...'
    },
    ccUserIds () {
      return this.ccForm.selectedUsers?.map(u => u.userId) || []
    },
  },
  methods: {
    openUserMultiSelect () { this.$refs.userMultiSelect.open() },
    onCcUsersSelected (users) { this.ccForm.selectedUsers = users || [] },
    removeCcUser (user) { this.ccForm.selectedUsers = this.ccForm.selectedUsers.filter(u => u.userId !== user.userId) },
    async loadTemplates () {
      try {
        const res = await listFlowTemplate({ pageNum: 1, pageSize: 200, bizType: 'travel', enabled: 1 })
        this.availableTpls = res.rows || res.data || []
        if (!this.tplId && this.availableTpls.length) {
          this.tplId = this.availableTpls[0].tplId
        }
        await this.refreshFlowPreview()
      } catch (err) {
        this.availableTpls = []
      }
    },
    async refreshFlowPreview () {
      this.flowLoading = true
      try {
        if (this.approverMode === 'manual') {
          this.flowTpl = null
          this.flowNodes = []
          return
        }
        if (!this.tplId) {
          this.flowTpl = null
          this.flowNodes = []
          return
        }
        this.flowTpl = this.availableTpls.find(t => t.tplId === this.tplId) || null
        const nodeRes = await listFlowNode({ pageNum: 1, pageSize: 500, tplId: this.tplId })
        this.flowNodes = (nodeRes.rows || nodeRes.data || []).filter(n => n.nodeType !== 'end').sort((a, b) => (a.orderNo || 0) - (b.orderNo || 0))
      } finally {
        this.flowLoading = false
      }
    },
    async onTplChange (val) {
      this.tplId = val
      await this.refreshFlowPreview()
    },
    onApproverModeChange (val) {
      this.approverMode = val
      if (val === 'manual') this.tplId = null
      this.refreshFlowPreview()
    },
    openUserSelect () {
      this.$refs.userSelect.open()
    },
    onUserSelected (row) {
      if (row) {
        this.assigneeUserId = row.userId
        this.assigneeUserName = row.nickName || row.userName || row.userId
        this.refreshFlowPreview()
      }
    },
    nodePreviewText (n, idx) {
      const typeMap = { approve: '审批', cc: '抄送' }
      const ruleMap = { fixed_user: '指定人员', role: '指定角色', position: '指定岗位', leader: '直属上级' }
      const nodeType = typeMap[n.nodeType] || '节点'
      const rule = ruleMap[n.approverRule] || '规则'
      let detail = ''
      try {
        const arr = Array.isArray(n.approverValue) ? n.approverValue : JSON.parse(n.approverValue || '[]')
        if (arr.length) detail = `：${arr.join('、')}`
      } catch (e) { detail = n.approverValue ? `：${n.approverValue}` : '' }
      const text = `${nodeType}（${rule}${detail}）`
      return idx === this.flowNodes.length - 1 ? `${text} → 结束` : text
    },
    normalizeOssIds (val) {
      if (!val) return ''
      if (typeof val === 'string') return val
      if (Array.isArray(val)) {
        const ids = val.map(x => (x && typeof x === 'object') ? (x.ossId ?? x.id ?? x.value) : x).filter(Boolean)
        return ids.join(',')
      }
      return String(val)
    },
    formatEmpLabel (emp) {
      const name = emp.empName || emp.nickName || emp.userName || ''
      const no = emp.empNo ? ` · ${emp.empNo}` : ''
      const dept = emp.deptName ? ` · ${emp.deptName}` : ''
      return `${name || '员工'}${no}${dept}`.trim()
    },
    async loadCurrentEmployee () {
      const userId = this.$store?.state?.user?.id
      if (!userId) {
        this.$message.error('无法获取当前用户信息，请重新登录')
        return
      }
      try {
        const res = await getEmployeeByUserId(userId)
        if (res.code === 200 && res.data) {
          this.currentEmp = res.data
          this.form.empId = res.data.empId
        } else {
          this.$message.error('未找到当前用户对应的员工信息，请在员工管理中关联系统用户')
        }
      } catch (error) {
        this.$message.error('加载员工信息失败，请稍后重试')
      }
    },
    submit () {
      this.$refs.formRef.validate(async valid => {
        if (!valid) return
        if (this.approverMode === 'template' && !this.tplId) {
          return this.$message.warning('请选择一个流程模板')
        }
        if (this.approverMode === 'manual' && !this.assigneeUserId) {
          return this.$message.warning('请选择审批人')
        }
        this.submitting = true
        const payload = {
          empId: this.form.empId,
          travelType: this.form.travelType,
          startTime: this.form.startTime,
          endTime: this.form.endTime,
          destination: this.form.destination,
          reason: this.form.reason,
          accessoryApplyIds: this.normalizeOssIds(this.form.accessoryApplyIds),
          accessoryReceiptIds: this.normalizeOssIds(this.form.accessoryReceiptIds),
          payeeName: this.form.payeeName,
          estimatedCost: this.form.estimatedCost,
          status: 'pending',
          bankName: this.form.bankName,
          bankAccount: this.form.bankAccount,
          remark: this.form.remark,
          // tplId: this.tplId,
          manualAssigneeUserId: this.assigneeUserId,
          projectId: this.form.projectId,
        }
        if (this.approverMode === 'template') {
          payload.tplId = this.tplId
        }
        try {
          const { data: instance } = await addTravelReq(payload)
          console.log(instance, this.ccForm)
          if (this.ccForm.selectedUsers.length && instance?.instId) {
            const ccUserIds = this.ccForm.selectedUsers.map(u => u.userId)
            const fromUserId = this.$store?.state?.user?.id
            const payload = {
              instId: instance.instId,
              bizId: instance.bizId,
              bizType: 'travel',
              ccUserIds: ccUserIds,
              remark: this.ccForm.remark,
              fromUserId,
              nodeId: 0,
              readFlag: 0,
              nodeName: '节点#0'
            }
            await ccFlowTask(payload)
          }
          this.$message.success('提交成功')
          this.$router.push('/hrm/apply')
        } catch (e) {
          this.$message.error('提交失败，请稍后重试')
        } finally {
          this.submitting = false
        }
      })
    }
  }
}
</script>

<style lang="scss" scoped>
.request-page {
  padding: 16px 20px 32px;
  background: #f8f9fb;
}

.form-card {
  max-width: 980px;
  margin: 0 auto;
  border: 1px solid #d7d9df;
  border-radius: 12px;
  background: #ffffff;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 700;
  color: #2b2f36;
}

.actions {
  display: flex;
  gap: 8px;
}

.metal-form {
  padding-right: 8px;
}

.block-title {
  margin: 20px 0 12px;
  padding-left: 10px;
  font-weight: 700;
  color: #2f3440;
  border-left: 3px solid #9aa3b2;
}

.hint-text {
  margin-top: 6px;
  font-size: 12px;
  color: #8a8f99;
  line-height: 1.4;
}

.form-summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 12px;
  margin-bottom: 12px;
  border: 1px solid #e6e8ed;
  border-radius: 10px;
  background: linear-gradient(180deg, #ffffff 0%, #fbfcfe 100%);
}

.summary-title {
  font-size: 16px;
  font-weight: 800;
  color: #2b2f36;
}

.summary-sub {
  margin-top: 4px;
  font-size: 12px;
  color: #8a8f99;
}

.summary-right {
  display: flex;
  gap: 16px;
}

.summary-item .k {
  font-size: 12px;
  color: #8a8f99;
}

.summary-item .v {
  margin-top: 2px;
  font-weight: 700;
  color: #2b2f36;
}

.approve-mode {
  padding: 12px;
  border: 1px solid #e6e8ed;
  border-radius: 10px;
  background: #fcfdff;
}

.approve-panel {
  margin-top: 12px;
}

.approve-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.approve-row .k {
  font-size: 14px;
  color: #606266;
}

.flow-preview {
  margin-top: 20px;
  padding: 12px;
  border: 1px solid #e6e8ed;
  border-radius: 10px;
  background: #fcfdff;
}

.flow-title {
  font-weight: 800;
  color: #2b2f36;
}

.flow-sub {
  margin-top: 4px;
  font-size: 12px;
  color: #8a8f99;
}

.flow-steps {
  margin-top: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.flow-step {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid #e6e8ed;
  background: #fff;
}

.flow-step .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #9aa3b2;
}

.flow-step .dot.success {
  background: #67c23a;
}

.flow-step .txt {
  font-size: 12px;
  color: #2b2f36;
  font-weight: 600;
}

.flow-steps .line {
  width: 26px;
  height: 1px;
  background: #e6e8ed;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
}

@media (max-width: 1200px) {
  .summary-right {
    display: none;
  }
}
</style>
