#!/usr/bin/env bash
# ============================================================
# publish-post.sh — 写博客并发布（Hermes 调用）
#
# 用法:
#   publish-post.sh "文章标题" <content.md 文件路径> ["tag1,tag2"] [--date "YYYY-MM-DD HH:MM:SS"]
#
# 流程:
#   1. 把 markdown 写入 hexo-blog/source/_posts/
#   2. hexo generate 构建产物
#   3. 产物同步到 wahyd4.github.com 工作树的新分支 preview/<slug>
#   4. 推送分支 + 创建 PR (base=master)  — master 不动，不部署
#   5. 输出 PR 链接
#
# 预览: 用 demo-service 单独上传 public/ 到 demo.junv.cc/blog-preview/
# ============================================================
set -euo pipefail

TITLE="$1"
CONTENT_FILE="$2"
TAGS="${3:-}"
DATE_ARG="${4:-}"

BLOG_DIR="$HOME/code/blog/hexo-blog"
POSTS_DIR="$BLOG_DIR/source/_posts"
PROD_DIR="$HOME/code/blog/wahyd4.github.com"
REPO="wahyd4/wahyd4.github.com"

# --- slug 生成（python 处理中文/特殊字符）---
slug="$(python3 -c "
import sys, re
title = sys.argv[1]
s = title.lower()
s = re.sub(r'[^a-z0-9\u4e00-\u9fff]+', '-', s).strip('-')
print(s[:80] or 'post')" "$TITLE")"
# 避免与现有 slug 冲突
n=2
base="$slug"
while [ -f "$POSTS_DIR/$slug.md" ]; do
  slug="${base}-${n}"
  n=$((n+1))
done

# --- 生成 front-matter ---
if [ -n "$DATE_ARG" ]; then
  DATE_LINE="date: $DATE_ARG"
else
  DATE_LINE="date: $(date '+%Y-%m-%d %H:%M:%S')"
fi

{
  echo "---"
  echo "title: \"$TITLE\""
  echo "$DATE_LINE"
  if [ -n "$TAGS" ]; then
    echo "tags: [$TAGS]"
  fi
  echo "---"
  echo ""
  cat "$CONTENT_FILE"
} > "$POSTS_DIR/$slug.md"

echo "✅ 已写入 $POSTS_DIR/$slug.md"

# --- 构建 ---
cd "$BLOG_DIR"
npx hexo clean >/dev/null 2>&1 || true
npx hexo generate 2>&1 | tail -1

# --- 同步产物到 wahyd4.github.com 分支 ---
BRANCH="preview/${slug}"
cd "$PROD_DIR"
git fetch origin --quiet
git checkout -B "$BRANCH" origin/master --quiet

# 清理旧产物（除 .git），再拷贝新产物
find . -path ./.git -prune -o -type f -print0 | xargs -0 rm -f 2>/dev/null || true
find . -path ./.git -prune -o -type d -empty -print0 | xargs -0 rmdir 2>/dev/null || true
cp -r "$BLOG_DIR/public/." .

git add -A
if git diff --cached --quiet; then
  echo "⚠️ 产物无变化，跳过提交"
else
  git -c user.name="Hermes Bot" -c user.email="hermes@junv.cc" commit -m "Site updated: $(date '+%Y-%m-%d %H:%M:%S') — $TITLE" --quiet
  git push -u origin "$BRANCH" --quiet 2>&1 | tail -1 || true
fi

# --- 创建 PR ---
EXISTING_PR="$(gh pr list --repo "$REPO" --head "$BRANCH" --json number --jq '.[0].number' 2>/dev/null || true)"
if [ -n "$EXISTING_PR" ]; then
  echo "PR 已存在: https://github.com/$REPO/pull/$EXISTING_PR"
else
  PR_URL="$(gh pr create --repo "$REPO" --base master --head "$BRANCH" \
    --title "📝 新博客: $TITLE" \
    --body "自动发布：**$TITLE**

- 源码: \`source/_posts/$slug.md\`
- 合并后自动上线 toozhao.com
- 请 review 后 merge" 2>&1)"
  echo "PR: $PR_URL"
fi