#!/bin/bash
# release-draft.sh
# 最小可用版：从本地 git 仓库创建 Gitea draft release
#
# 用法:
#   export GITEA_TOKEN=$(bw get password "Gitea - qiudl Token")
#   bash release-draft.sh v1.2.0 [--from v1.1.9]
#
# 输出: 创建的 draft release URL（待人工 publish）
# REQ-20260416-0017 P0-3 最小可用脚本

set -e

VERSION="$1"
if [ -z "$VERSION" ]; then
    echo "❌ 用法: $0 <version> [--from <previous_tag>]"
    exit 1
fi

FROM_TAG=""
if [ "$2" = "--from" ]; then
    FROM_TAG="$3"
fi

if ! git rev-parse --git-dir >/dev/null 2>&1; then
    echo "❌ 不在 git 仓库内"
    exit 1
fi

REPO_SLUG=$(git remote get-url origin 2>/dev/null | \
    sed -E 's|.*[:/]([^/]+/[^/]+)\.git$|\1|' | \
    sed -E 's|.*[:/]([^/]+/[^/]+)$|\1|')

if [ -z "$REPO_SLUG" ]; then
    echo "❌ 无法从 git remote 推断 OWNER/REPO"
    exit 1
fi

if [ -z "$GITEA_TOKEN" ]; then
    echo "❌ 需要 GITEA_TOKEN 环境变量"
    echo "   export GITEA_TOKEN=\$(bw get password 'Gitea - qiudl Token')"
    exit 1
fi

GITEA_URL="${GITEA_URL:-https://gitea.pipexerp.com}"

# 推断 from
if [ -z "$FROM_TAG" ]; then
    FROM_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "")
fi

TO_REF="HEAD"

# 生成 changelog 内容
echo "📋 生成 changelog..."

CHANGELOG=""
if [ -n "$FROM_TAG" ]; then
    COMMITS=$(git log --pretty=format:'- %s (%h)' "${FROM_TAG}..${TO_REF}" 2>/dev/null || echo "")
else
    COMMITS=$(git log --pretty=format:'- %s (%h)' "${TO_REF}" 2>/dev/null || echo "")
fi

if [ -z "$COMMITS" ]; then
    echo "⚠️ 无 commit，放弃"
    exit 1
fi

# 按类型分组
FEATS=$(echo "$COMMITS" | grep -iE 'feat(\(|:)|新功能' || true)
FIXES=$(echo "$COMMITS" | grep -iE 'fix(\(|:)|修复' || true)
CHORES=$(echo "$COMMITS" | grep -iE 'chore(\(|:)' || true)
OTHERS=$(echo "$COMMITS" | grep -vE 'feat(\(|:)|fix(\(|:)|chore(\(|:)|新功能|修复' || true)

CHANGELOG="## 发布内容

**版本**: \`${VERSION}\`
**区间**: \`${FROM_TAG:-init}..${TO_REF}\`

"

if [ -n "$FEATS" ]; then
    CHANGELOG="${CHANGELOG}### 新功能

${FEATS}

"
fi

if [ -n "$FIXES" ]; then
    CHANGELOG="${CHANGELOG}### Bug 修复

${FIXES}

"
fi

if [ -n "$CHORES" ]; then
    CHANGELOG="${CHANGELOG}### 杂项

${CHORES}

"
fi

if [ -n "$OTHERS" ]; then
    CHANGELOG="${CHANGELOG}### 其他

${OTHERS}

"
fi

CHANGELOG="${CHANGELOG}

---

⚠️ **这是 draft release**，审查无误后点击 'Publish release' 按钮才会触发生产部署。

📋 审查要点：
- [ ] 所有改动已过 PR 评审
- [ ] SQL migration 已验证（如有）
- [ ] 回滚方案已确认（如有）
- [ ] 生产环境准备就绪"

# 创建 draft release
echo "🚀 创建 Gitea draft release..."

BODY_JSON=$(python3 -c "
import json
print(json.dumps({
    'tag_name': '$VERSION',
    'target_commitish': 'main',
    'name': '$VERSION',
    'body': '''$CHANGELOG''',
    'draft': True,
    'prerelease': False,
}))
")

RESP=$(curl -s -X POST \
    -H "Authorization: token ${GITEA_TOKEN}" \
    -H "Content-Type: application/json" \
    -d "$BODY_JSON" \
    "${GITEA_URL}/api/v1/repos/${REPO_SLUG}/releases")

HTML_URL=$(echo "$RESP" | python3 -c "import sys,json; print(json.load(sys.stdin).get('html_url',''))" 2>/dev/null)

if [ -n "$HTML_URL" ]; then
    echo "✅ Draft release 已创建"
    echo "🔗 $HTML_URL"
    echo ""
    echo "⏭️  下一步："
    echo "   1. 打开链接审查产物清单"
    echo "   2. 确认无误后点 'Publish release' 按钮"
    echo "   3. CI/CD 将自动触发生产部署"
else
    echo "❌ 创建失败"
    echo "$RESP" | head -20
    exit 1
fi