<template>
  <div class="log-view">
    <div class="log-header">
      <div class="title-row">
        <Icon icon="lucide:terminal" class="title-icon" />
        <h1 class="title">运行日志</h1>
        <span class="log-count">共 {{ logStore.logs.length }} 条</span>
      </div>

      <div class="stats-row">
        <span class="stat info">info {{ counts.info }}</span>
        <span class="stat warn">warn {{ counts.warn }}</span>
        <span class="stat error">error {{ counts.error }}</span>
        <span class="stat debug">debug {{ counts.debug }}</span>
      </div>

      <div class="toolbar">
        <div class="filter-group">
          <label class="filter-label">模块</label>
          <select v-model="selectedModule" class="filter-select">
            <option value="">全部</option>
            <option v-for="m in modules" :key="m" :value="m">{{ m }}</option>
          </select>

          <label class="filter-label">级别</label>
          <select v-model="selectedLevel" class="filter-select">
            <option value="">全部</option>
            <option value="debug">debug</option>
            <option value="info">info</option>
            <option value="warn">warn</option>
            <option value="error">error</option>
          </select>

          <label class="filter-label">搜索</label>
          <input v-model="searchText" class="filter-input" placeholder="关键字..." />
        </div>

        <div class="action-group">
          <button class="btn" @click="scrollToBottom()" title="滚到底部">
            <Icon icon="lucide:arrow-down-to-line" />
          </button>
          <button class="btn" @click="scrollToTop()" title="滚到顶部">
            <Icon icon="lucide:arrow-up-to-line" />
          </button>
          <button class="btn" @click="toggleExpandAll()">
            <Icon :icon="expandedAll ? 'lucide:minimize-2' : 'lucide:maximize-2'" />
            <span>{{ expandedAll ? '收起详情' : '展开详情' }}</span>
          </button>
          <button class="btn" @click="exportTxt()" title="导出 TXT">
            <Icon icon="lucide:file-text" />
            <span>TXT</span>
          </button>
          <button class="btn" @click="exportJson()" title="导出 JSON">
            <Icon icon="lucide:file-code" />
            <span>JSON</span>
          </button>
          <button class="btn" @click="copyAll()" title="复制全部">
            <Icon icon="lucide:copy" />
          </button>
          <button class="btn danger" @click="onClear()" title="清空">
            <Icon icon="lucide:trash-2" />
          </button>
        </div>
      </div>
    </div>

    <div ref="listRef" class="log-body">
      <div v-if="filtered.length === 0" class="empty-state">
        <Icon icon="lucide:file-text" class="empty-icon" />
        <div class="empty-text">暂无日志</div>
      </div>

      <div
        v-for="entry in filtered"
        :key="entry.id"
        class="log-row"
        :class="entry.level"
        @click="toggleExpand(entry.id)"
      >
        <div class="row-main">
          <span class="log-time">{{ entry.time }}</span>
          <span class="log-level">{{ entry.level.toUpperCase() }}</span>
          <span class="log-module">[{{ entry.module }}]</span>
          <span class="log-message">{{ entry.message }}</span>
          <Icon
            v-if="entry.detail !== undefined"
            icon="lucide:chevron-down"
            class="expand-icon"
            :class="{ expanded: isExpanded(entry.id) }"
          />
        </div>
        <div v-if="entry.detail !== undefined && isExpanded(entry.id)" class="row-detail" @click.stop>
          <template v-if="isImageUrl(entry.detail)">
            <img :src="String(entry.detail)" class="detail-image" alt="图片日志" loading="lazy" />
            <div class="detail-src">{{ String(entry.detail) }}</div>
          </template>
          <template v-else-if="Array.isArray(entry.detail) || typeof entry.detail === 'object'">
            <pre class="json-block">{{ formatJson(entry.detail) }}</pre>
          </template>
          <template v-else-if="typeof entry.detail === 'string' && (entry.detail.startsWith('http:') || entry.detail.startsWith('https:'))">
            <a :href="entry.detail" target="_blank" rel="noopener" class="detail-link">{{ entry.detail }}</a>
          </template>
          <template v-else>
            <pre class="text-block">{{ String(entry.detail) }}</pre>
          </template>
          <div class="detail-actions">
            <button class="mini-btn" @click.stop="copyDetail(entry.detail)">
              <Icon icon="lucide:copy" />
              <span>复制</span>
            </button>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script setup lang="ts">
import { computed, ref, nextTick, onMounted } from 'vue';
import { Icon } from '@iconify/vue';
import { useLogStore } from '../stores/log';

const logStore = useLogStore();

const selectedModule = ref('');
const selectedLevel = ref('');
const searchText = ref('');
const listRef = ref<HTMLDivElement | null>(null);
const expandedAll = ref(false);
const forcedExpanded = ref<Set<number>>(new Set());
const forcedCollapsed = ref<Set<number>>(new Set());

const modules = computed(() => logStore.moduleList());
const counts = computed(() => logStore.countByLevel());

const filtered = computed(() => {
  const keyword = searchText.value.trim().toLowerCase();
  return logStore.logs.filter((l) => {
    if (selectedModule.value && l.module !== selectedModule.value) return false;
    if (selectedLevel.value && l.level !== selectedLevel.value) return false;
    if (keyword) {
      const hay = `${l.message} ${l.module}`.toLowerCase();
      if (!hay.includes(keyword)) return false;
    }
    return true;
  });
});

const isExpanded = (id: number) => {
  if (forcedExpanded.value.has(id)) return true;
  if (forcedCollapsed.value.has(id)) return false;
  const entry = logStore.logs.find((e) => e.id === id);
  return entry ? entry.level === 'error' : false;
};

const toggleExpand = (id: number) => {
  const currentlyExpanded = isExpanded(id);
  if (currentlyExpanded) {
    forcedCollapsed.value.add(id);
    forcedExpanded.value.delete(id);
  } else {
    forcedExpanded.value.add(id);
    forcedCollapsed.value.delete(id);
  }
};

const toggleExpandAll = () => {
  expandedAll.value = !expandedAll.value;
  if (expandedAll.value) {
    for (const e of filtered.value) forcedExpanded.value.add(e.id);
    forcedCollapsed.value.clear();
  } else {
    for (const e of filtered.value) forcedCollapsed.value.add(e.id);
    forcedExpanded.value.clear();
  }
};

const isImageUrl = (detail: any) => {
  if (typeof detail !== 'string') return false;
  const lower = detail.trim().toLowerCase();
  if (!lower.startsWith('http://') && !lower.startsWith('https://') && !lower.startsWith('data:image/')) return false;
  return /\.(png|jpe?g|gif|webp|bmp|svg)(\?.*)?$/i.test(lower) || lower.startsWith('data:image/');
};

const formatJson = (val: any) => {
  try {
    return JSON.stringify(val, null, 2);
  } catch {
    return String(val);
  }
};

const scrollToBottom = () => {
  nextTick(() => {
    if (listRef.value) listRef.value.scrollTop = listRef.value.scrollHeight;
  });
};

const scrollToTop = () => {
  nextTick(() => {
    if (listRef.value) listRef.value.scrollTop = 0;
  });
};

const buildTextLines = () => {
  return logStore.logs.map((l) => `[${l.time}] [${l.level.toUpperCase()}] [${l.module}] ${l.message}${
    l.detail !== undefined ? '\n  ' + formatDetailForText(l.detail) : ''
  }`);
};

const formatDetailForText = (d: any): string => {
  if (typeof d === 'string') return d;
  if (d instanceof Error) return `${d.name}: ${d.message}\n${d.stack || ''}`;
  try { return JSON.stringify(d, null, 2); } catch { return String(d); }
};

const exportTxt = () => {
  const blob = new Blob([buildTextLines().join('\n')], { type: 'text/plain;charset=utf-8' });
  downloadBlob(blob, `qzmusic-logs-${tsFileName()}.txt`);
};

const exportJson = () => {
  const data = JSON.stringify(
    {
      exportAt: new Date().toISOString(),
      total: logStore.logs.length,
      counts: counts.value,
      logs: logStore.logs,
    },
    (_, v) => (v instanceof Error ? { name: v.name, message: v.message, stack: v.stack } : v),
    2,
  );
  const blob = new Blob([data], { type: 'application/json;charset=utf-8' });
  downloadBlob(blob, `qzmusic-logs-${tsFileName()}.json`);
};

const copyAll = async () => {
  const text = buildTextLines().join('\n');
  await writeToClipboard(text);
};

const copyDetail = async (detail: any) => {
  const text = typeof detail === 'string' ? detail : formatDetailForText(detail);
  await writeToClipboard(text);
};

const downloadBlob = (blob: Blob, filename: string) => {
  const url = URL.createObjectURL(blob);
  const a = document.createElement('a');
  a.href = url;
  a.download = filename;
  a.click();
  setTimeout(() => URL.revokeObjectURL(url), 1000);
};

const tsFileName = () =>
  new Date().toISOString().replace(/[:.]/g, '-').replace('T', '_').slice(0, 19);

const writeToClipboard = async (text: string) => {
  try {
    if (navigator.clipboard && navigator.clipboard.writeText) {
      await navigator.clipboard.writeText(text);
    } else {
      const ta = document.createElement('textarea');
      ta.value = text;
      ta.style.position = 'fixed';
      ta.style.left = '-9999px';
      document.body.appendChild(ta);
      ta.select();
      document.execCommand('copy');
      document.body.removeChild(ta);
    }
  } catch {
    // 静默失败
  }
};

const onClear = () => {
  if (confirm('确定清空所有日志？')) {
    logStore.clear();
    forcedExpanded.value.clear();
    forcedCollapsed.value.clear();
  }
};

onMounted(() => {
  scrollToBottom();
});
</script>

<style scoped>
.log-view {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 24px;
}

.log-header {
  background: var(--color-bg-secondary);
  border-radius: 12px;
  padding: 16px 20px;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.title-icon {
  font-size: 22px;
  color: var(--color-accent);
}

.title {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
}

.log-count {
  font-size: 12px;
  color: var(--color-text-muted);
  margin-left: 8px;
}

.stats-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.stat {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 6px;
  font-family: ui-monospace, monospace;
  font-weight: 500;
}

.stat.info { background: rgba(59, 130, 246, 0.12); color: #3b82f6; }
.stat.warn { background: rgba(245, 158, 11, 0.15); color: #f59e0b; }
.stat.error { background: rgba(239, 68, 68, 0.12); color: #ef4444; }
.stat.debug { background: rgba(139, 92, 246, 0.12); color: #8b5cf6; }

.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  border-top: 1px solid var(--color-border);
  padding-top: 12px;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-label {
  font-size: 12px;
  color: var(--color-text-muted);
}

.filter-select,
.filter-input {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 12px;
  outline: none;
  transition: border-color 0.15s;
}

.filter-select:focus,
.filter-input:focus {
  border-color: var(--color-accent);
}

.filter-input {
  width: 160px;
}

.action-group {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 12px;
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
  font-size: 12px;
}

.btn:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
  border-color: var(--color-text-muted);
}

.btn.danger:hover {
  color: #ef4444;
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.08);
}

.log-body {
  flex: 1;
  overflow-y: auto;
  background: var(--color-bg-secondary);
  border-radius: 12px;
  border: 1px solid var(--color-border);
  padding: 8px 0;
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  font-size: 12.5px;
}

.log-body::-webkit-scrollbar {
  width: 8px;
}

.log-body::-webkit-scrollbar-track {
  background: transparent;
}

.log-body::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  color: var(--color-text-muted);
  gap: 12px;
}

.empty-icon {
  font-size: 48px;
  opacity: 0.3;
}

.empty-text {
  font-size: 14px;
}

.log-row {
  display: flex;
  flex-direction: column;
  padding: 8px 16px;
  cursor: pointer;
  border-bottom: 1px solid transparent;
  transition: background 0.1s;
}

.log-row:hover {
  background: var(--color-bg-tertiary);
}

.row-main {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.log-time {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.log-level {
  font-weight: 700;
  flex-shrink: 0;
  min-width: 48px;
}

.log-module {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.log-message {
  color: var(--color-text-primary);
  flex: 1;
  white-space: pre-wrap;
  word-break: break-word;
}

.expand-icon {
  color: var(--color-text-muted);
  font-size: 14px;
  transition: transform 0.15s;
  flex-shrink: 0;
}

.expand-icon.expanded {
  transform: rotate(180deg);
}

.log-row.info .log-level { color: #3b82f6; }
.log-row.warn .log-level { color: #f59e0b; }
.log-row.error .log-level { color: #ef4444; }
.log-row.error { background: rgba(239, 68, 68, 0.04); }
.log-row.error:hover { background: rgba(239, 68, 68, 0.08); }
.log-row.debug .log-level { color: #8b5cf6; }

.row-detail {
  margin-top: 8px;
  padding: 10px 12px;
  background: var(--color-bg-primary);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 6px 6px 0;
  cursor: default;
  max-width: 100%;
}

.detail-image {
  max-width: 100%;
  max-height: 320px;
  border-radius: 8px;
  display: block;
  margin: 0 auto;
  border: 1px solid var(--color-border);
}

.detail-src {
  margin-top: 8px;
  font-size: 11px;
  color: var(--color-text-muted);
  text-align: center;
  word-break: break-all;
}

.detail-link {
  color: var(--color-accent);
  font-size: 12px;
  text-decoration: none;
  word-break: break-all;
}

.detail-link:hover {
  text-decoration: underline;
}

.json-block,
.text-block {
  margin: 0;
  font-family: inherit;
  font-size: 12px;
  color: var(--color-text-secondary);
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.6;
  max-height: 400px;
  overflow: auto;
}

.detail-actions {
  margin-top: 8px;
  display: flex;
  gap: 8px;
}

.mini-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  border-radius: 6px;
  cursor: pointer;
  font-size: 11px;
  transition: all 0.15s;
}

.mini-btn:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-tertiary);
  border-color: var(--color-text-muted);
}
</style>
