#!/usr/bin/env bash
# deploy_wiki.sh — Sync docs/wiki/pages/*.md to the local wiki git clone
#
# ── Convention ────────────────────────────────────────────────────────────────
# The Gitea wiki is a SEPARATE git repo (pi_mcps.wiki.git).
# We keep a persistent local clone at wiki/ in the repo root.
# That folder is gitignored so it doesn't conflict with the main repo.
#
# First-time setup (run once):
#   git clone http://pplate:TOKEN@192.168.188.119:30008/pplate/pi_mcps.wiki.git wiki/
#
# ── Daily workflow ────────────────────────────────────────────────────────────
# 1. Edit pages in docs/wiki/pages/*.md  (tracked in pi_mcps main repo)
# 2. Run:  ./docs/wiki/deploy_wiki.sh
#          ./docs/wiki/deploy_wiki.sh "docs: describe your change"
#
# The script copies pages into wiki/, commits, and pushes to Gitea.
# ─────────────────────────────────────────────────────────────────────────────

set -euo pipefail

# ── Config ────────────────────────────────────────────────────────────────────
GITEA_URL="http://192.168.188.119:30008"
OWNER="pplate"
REPO="pi_mcps"

# Resolve paths relative to repo root (two levels up from docs/wiki/)
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "${SCRIPT_DIR}/../.." && pwd)"
PAGES_DIR="${SCRIPT_DIR}/pages"
WIKI_DIR="${REPO_ROOT}/wiki"
COMMIT_MSG="${1:-docs: sync wiki pages $(date -u '+%Y-%m-%d %H:%M UTC')}"

# ── Validate ──────────────────────────────────────────────────────────────────
if [[ ! -d "${WIKI_DIR}/.git" ]]; then
    echo "❌ Wiki repo not set up. Run first-time setup:"
    echo ""
    echo "   TOKEN=8bf0c734ebda3e61d9c9068489ce58a2bf8d33db"
    echo "   git clone http://pplate:\${TOKEN}@192.168.188.119:30008/pplate/pi_mcps.wiki.git wiki/"
    echo ""
    exit 1
fi

if [[ ! -d "${PAGES_DIR}" ]]; then
    echo "❌ Pages directory not found: ${PAGES_DIR}"
    exit 1
fi

PAGE_COUNT=$(find "${PAGES_DIR}" -name "*.md" | wc -l)
if [[ "${PAGE_COUNT}" -eq 0 ]]; then
    echo "❌ No .md files found in ${PAGES_DIR}"
    exit 1
fi

echo "📚 Found ${PAGE_COUNT} wiki pages in ${PAGES_DIR}"

# ── Pull latest (avoid non-fast-forward push) ─────────────────────────────────
echo "📥 Pulling latest wiki changes..."
git -C "${WIKI_DIR}" pull --quiet --rebase origin main

# ── Copy pages ────────────────────────────────────────────────────────────────
echo "📋 Copying pages to ${WIKI_DIR}/..."
for md_file in "${PAGES_DIR}"/*.md; do
    filename="$(basename "${md_file}")"
    cp "${md_file}" "${WIKI_DIR}/${filename}"
    echo "   → ${filename}"
done

# ── Commit and push ───────────────────────────────────────────────────────────
cd "${WIKI_DIR}"

git add -A

if git diff --cached --quiet; then
    echo "✅ No changes detected — wiki is already up to date."
    exit 0
fi

CHANGED=$(git diff --cached --name-only | wc -l)
echo "📝 Committing ${CHANGED} changed file(s)..."
git commit --quiet -m "${COMMIT_MSG}"

echo "🚀 Pushing to Gitea wiki..."
git push --quiet origin main

echo ""
echo "✅ Wiki deployed successfully!"
echo "   Pages:   ${PAGE_COUNT} total, ${CHANGED} updated"
echo "   Message: ${COMMIT_MSG}"
echo "   URL:     ${GITEA_URL}/${OWNER}/${REPO}/wiki"