<template>
  <div class="container">
    <section class="hero fade-up">
      <div class="hero-badge">REAL-TIME CHECK</div>
      <h1 class="hero-title">文本信息发布</h1>
      <p class="hero-sub">支持公开发布、私有发布与用户私信，提交时自动执行垃圾信息识别。</p>
    </section>

    <section class="card fade-up fade-up-delay-1">
      <div class="card-title">发布内容</div>

      <div class="field">
        <label class="field-label">内容文本</label>
        <textarea class="textarea" v-model="text" placeholder="请输入要发布的文本信息" rows="4"></textarea>
        <div class="field-help">当前字数：{{ text.length }}，建议不少于 2 个字符。</div>
      </div>

      <div class="grid-2">
        <div class="field">
          <label class="field-label">发布类型</label>
          <select class="select" v-model="visibility">
            <option v-for="opt in visibilityOptions" :key="opt.value" :value="opt.value">{{ opt.label }}</option>
          </select>
        </div>
        <div class="field" v-if="visibility === 'direct'">
          <label class="field-label">接收人用户名</label>
          <input class="input" v-model.trim="recipientUsername" placeholder="私信发送时必填" />
        </div>
      </div>

      <button class="btn btn-primary" :disabled="loading" @click="publish">
        {{ loading ? '检测中...' : '提交发布' }}
      </button>
    </section>

    <section class="card fade-up fade-up-delay-2">
      <div class="card-title">快捷示例</div>
      <div class="chip-group">
        <span
          v-for="(item, idx) in quickTexts"
          :key="idx"
          class="chip"
          @click="text = item"
        >{{ item }}</span>
      </div>
    </section>

    <section class="card fade-up fade-up-delay-3" v-if="result">
      <div class="card-title">识别反馈</div>

      <div class="row">
        <span class="label">发布结果</span>
        <span :class="result.publish_allowed ? 'status-ham' : 'status-spam'">
          {{ result.publish_allowed ? '发布成功' : '已拦截，需申诉' }}
        </span>
      </div>

      <div class="row" v-if="result.detect && result.detect.category_label">
        <span class="label">分类标签</span>
        <span class="status-spam">{{ result.detect.category_label }}</span>
      </div>

      <div class="row">
        <span class="label">模型判断</span>
        <span class="value">{{ result.detect && result.detect.prediction_text }}</span>
      </div>

      <div class="row">
        <span class="label">垃圾概率</span>
        <span class="value">{{ result.detect_spam_probability_text }}</span>
      </div>
      <div class="progress-track">
        <div class="progress-fill" :style="{ width: result.detect_spam_probability_text }"></div>
      </div>

      <div class="row">
        <span class="label">检测置信度</span>
        <span class="value">{{ result.detect.confidence_text }}</span>
      </div>
      <div class="progress-track">
        <div class="progress-fill-safe" :style="{ width: result.detect.confidence_text }"></div>
      </div>

      <div class="row">
        <span class="label">本次阈值</span>
        <span class="value">{{ result.post_threshold_text }}</span>
      </div>

      <div class="field" v-if="result.detect.reason_tokens && result.detect.reason_tokens.length">
        <span class="field-label">风险关键词</span>
        <div class="chip-group">
          <span
            v-for="(tk, i) in result.detect.reason_tokens"
            :key="i"
            class="tag tag-danger"
            @click="showTokenWeight(tk)"
          >{{ tk.token }}</span>
        </div>
      </div>

      <button class="btn btn-ghost" @click="$router.push('/history')">查看发布历史</button>
    </section>
  </div>
</template>

<script>
import { request } from '@/utils/request'
import { toast, confirm } from '@/utils/feedback'

const QUICK_TEXTS = [
  '大家好，今晚 8 点社区线上读书会，欢迎参加。',
  '恭喜中奖领取大额现金，点击链接立即到账。',
  '本周活动报名已开放，请在群里接龙。',
  '高薪兼职日结，扫码进群立刻赚钱。'
]

const VISIBILITY_OPTIONS = [
  { value: 'public', label: '公开信息发布' },
  { value: 'private', label: '私有信息发布' },
  { value: 'direct', label: '用户私信发布' }
]

export default {
  name: 'DetectView',
  data() {
    return {
      text: '',
      loading: false,
      result: null,
      quickTexts: QUICK_TEXTS,
      visibilityOptions: VISIBILITY_OPTIONS,
      visibility: 'public',
      recipientUsername: ''
    }
  },
  methods: {
    formatPercent(value, digits = 2) {
      const num = Number(value || 0)
      return `${(num * 100).toFixed(digits)}%`
    },
    async publish() {
      if (this.loading) return
      const text = (this.text || '').trim()
      if (text.length < 2) {
        toast('请输入至少 2 个字符', 'error')
        return
      }
      const payload = { text, visibility: this.visibility }
      if (this.visibility === 'direct') {
        const receiver = (this.recipientUsername || '').trim()
        if (!receiver) {
          toast('私信请填写接收人用户名', 'error')
          return
        }
        payload.recipient_username = receiver
      }

      this.loading = true
      try {
        const result = await request({ url: '/content/publish', method: 'POST', data: payload })
        this.result = {
          ...result,
          detect: {
            ...(result.detect || {}),
            confidence_text: this.formatPercent((result.detect || {}).confidence, 2)
          },
          post_threshold_text: this.formatPercent((result.post || {}).threshold, 1),
          detect_spam_probability_text: this.formatPercent((result.detect || {}).spam_probability, 2)
        }
        toast(result.publish_allowed ? '发布成功' : '已拦截，可申诉', result.publish_allowed ? 'success' : 'error')
      } finally {
        this.loading = false
      }
    },
    showTokenWeight(tk) {
      const weight = Number(tk.weight || 0)
      const direction = weight >= 0 ? '倾向垃圾判定' : '倾向正常判定'
      confirm({
        title: '关键词权重',
        content: `关键词「${tk.token}」\n权重贡献：${weight >= 0 ? '+' : ''}${weight.toFixed(4)}\n（${direction}）`,
        showCancel: false,
        confirmText: '关闭'
      })
    }
  }
}
</script>
