#!/usr/bin/env bash
# =============================================================================
# push-wiki.sh — 把 docs/wiki/*.md 推送/更新到本仓库的 Gitea wiki
#
# 为什么需要它：本项目的百科源文件**版本化在仓库里**（docs/wiki/），
# Gitea wiki 只是它的发布面。改文档 = 改仓库文件 + 跑本脚本，日志与回溯都在 git 里。
#
# 行为：
#   · 幂等：页面不存在则 POST 新建，已存在则 PATCH 覆盖（标题 = 文件名去掉 .md）
#   · 凭据来自 `git credential fill`（与推代码同一套），脚本自身不存任何 token
#   · 凭据经临时 netrc 文件传给 curl（600 权限，退出即删），不进入 argv
#
# 用法：
#   bash scripts/push-wiki.sh                 # 推送全部页面
#   bash scripts/push-wiki.sh 05-运维手册      # 只推指定页面（按文件名/片段匹配）
#   WIKI_REMOTE=origin bash scripts/push-wiki.sh   # 指定 remote（默认 gitea，缺失则 origin）
# =============================================================================
set -euo pipefail

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
cd "$ROOT"

WIKI_DIR="$ROOT/docs/wiki"
FILTER="${1:-}"

# ---- 解析 remote / owner / repo -------------------------------------------
pick_remote() {
  for r in "${WIKI_REMOTE:-}" gitea origin; do
    [ -z "$r" ] && continue
    if git remote get-url "$r" >/dev/null 2>&1; then echo "$r"; return 0; fi
  done
  echo "无法找到可用的 git remote（试过: ${WIKI_REMOTE:-<空>} gitea origin）" >&2
  return 1
}
REMOTE="$(pick_remote)"
URL="$(git remote get-url "$REMOTE")"
case "$URL" in
  https://*) ;;
  *) echo "本脚本只支持 https remote（当前: $URL）" >&2; exit 1 ;;
esac
HOST="$(printf '%s' "$URL" | sed -E 's#^https://([^/]+)/.*#\1#')"
SLUG="$(printf '%s' "$URL" | sed -E 's#^https://[^/]+/##; s#\.git$##')"
OWNER="${SLUG%%/*}"
REPO="${SLUG#*/}"
API="https://$HOST/api/v1/repos/$OWNER/$REPO/wiki"

echo "wiki 目标 : $OWNER/$REPO @ $HOST (remote: $REMOTE)"
echo "源目录    : docs/wiki"
echo

# ---- 凭据 -----------------------------------------------------------------
CRED="$(printf 'protocol=https\nhost=%s\n\n' "$HOST" | git credential fill 2>/dev/null || true)"
USER="$(printf '%s\n' "$CRED" | sed -n 's/^username=//p')"
PASS="$(printf '%s\n' "$CRED" | sed -n 's/^password=//p')"
if [ -z "$PASS" ]; then
  echo "未从 git credential helper 取到 $HOST 的凭据（先确保 git push 能成功）" >&2
  exit 1
fi
NETRC="$(mktemp)"
chmod 600 "$NETRC"
trap 'rm -f "$NETRC"' EXIT
printf 'machine %s\nlogin %s\npassword %s\n' "$HOST" "$USER" "$PASS" > "$NETRC"

json_body() { # $1 = file
  python3 - "$1" <<'PY'
import base64, json, sys, pathlib
p = pathlib.Path(sys.argv[1])
print(json.dumps({
    "title": p.stem,
    "content_base64": base64.b64encode(p.read_text(encoding="utf-8").encode("utf-8")).decode("ascii"),
}, ensure_ascii=False))
PY
}

api() { # $1 = method, $2 = path, $3 = body(optional) -> 输出 HTTP 码
  local method="$1" path="$2" body="${3:-}"
  if [ -n "$body" ]; then
    curl -s --netrc-file "$NETRC" -o /tmp/push-wiki-resp.json -w '%{http_code}' \
      -X "$method" -H 'Content-Type: application/json' --data-binary "$body" "$API$path"
  else
    curl -s --netrc-file "$NETRC" -o /tmp/push-wiki-resp.json -w '%{http_code}' -X "$method" "$API$path"
  fi
}

# ---- 逐页推送 -------------------------------------------------------------
shopt -s nullglob
files=("$WIKI_DIR"/*.md)
[ ${#files[@]} -gt 0 ] || { echo "docs/wiki 下没有 .md 文件" >&2; exit 1; }

ok=0; fail=0
for f in "${files[@]}"; do
  title="$(basename "$f" .md)"
  if [ -n "$FILTER" ] && [[ "$title" != *"$FILTER"* ]]; then continue; fi
  body="$(json_body "$f")"

  code="$(api POST /new "$body")"
  if [ "$code" = "201" ]; then
    echo "  + $title  (新建)"; ok=$((ok+1)); continue
  fi
  enc="$(python3 -c 'import sys,urllib.parse;print(urllib.parse.quote(sys.argv[1], safe=""))' "$title")"
  code="$(api PATCH "/page/$enc" "$body")"
  if [ "$code" = "200" ]; then
    echo "  ~ $title  (更新)"; ok=$((ok+1))
  else
    echo "  ! $title 失败（HTTP $code）: $(head -c 200 /tmp/push-wiki-resp.json 2>/dev/null)" >&2
    fail=$((fail+1))
  fi
done

echo
echo "完成：成功 $ok 页，失败 $fail 页"
[ "$fail" -eq 0 ] || exit 1
echo "查看： https://$HOST/$OWNER/$REPO/wiki"