#!/bin/sh
# Kontra container entrypoint.
# - pulls content from Gitea every 30s
# - runs the webserver; restarts on content change (binary loads content at boot)
set -eu

BIN="${1:-kontra-bin}"
PORT="${2:-8600}"
CONTENT="/var/www/kontra_day/content"
GIT=/usr/bin/git

# Gitea SSH key for sam (mounted into the container)
export GIT_SSH_COMMAND="ssh -o StrictHostKeyChecking=accept-new -i /root/.ssh/id_ed25519"

# git refuses repos owned by another uid (host sam=1000); trust the mounted repo.
"$GIT" config --global --add safe.directory "$CONTENT" >/dev/null 2>&1 || true
"$GIT" config --global user.email "kontra-bot@localhost" >/dev/null 2>&1 || true
"$GIT" config --global user.name "kontra-bot" >/dev/null 2>&1 || true

# Initial clone if the mounted dir is empty (fresh deployment).
if [ ! -d "$CONTENT/.git" ]; then
  echo "cloning kontra-content..."
  "$GIT" clone git@gitea.lab.audasmedia.com.au:2222/sam/kontra-content.git "$CONTENT"
fi

"$GIT" -C "$CONTENT" rev-parse --is-inside-work-tree >/dev/null 2>&1 || true

start_server() {
  # exec: replaces THIS shell, so $! is the real binary PID; kill hits it.
  KONTRA_CONTENT="$CONTENT" KONTRA_MEDIA="/media" PORT="$PORT" exec "$BIN"
}

# First start.
start_server &
SERVER_PID=$!

# Pull every 30s; restart server when HEAD actually changes.
PREV=$("$GIT" -C "$CONTENT" rev-parse HEAD 2>/dev/null || echo "")
while true; do
  sleep 30
  if "$GIT" -C "$CONTENT" pull --ff-only origin main >/tmp/pull.log 2>&1; then
    CUR=$("$GIT" -C "$CONTENT" rev-parse HEAD)
    if [ -n "$PREV" ] && [ -n "$CUR" ] && [ "$PREV" != "$CUR" ]; then
      echo "$(date +%T) content changed ($PREV -> $CUR); restarting server"
      kill "$SERVER_PID" 2>/dev/null || true
      wait "$SERVER_PID" 2>/dev/null || true
      sleep 1
      start_server &
      SERVER_PID=$!
    fi
    PREV=$CUR
  else
    echo "pull failed:"; cat /tmp/pull.log
  fi
done