#!/bin/bash
# Cinny dev branch nightly build and deploy
set -e

REPO_DIR="/opt/cinny-dev"
WEB_ROOT="/var/www/html"
CONFIG_SAVED="/opt/cinny-dev/.cinny-config.json"
BUILD_DIR="/opt/cinny-dev/dist"
LOG="/var/log/cinny-dev-update.log"

exec >> "$LOG" 2>&1
echo "=== $(date) === Starting Cinny dev update ==="

# Save config from live site (skip if web root is already broken)
if [ -f "$WEB_ROOT/config.json" ]; then
    cp "$WEB_ROOT/config.json" "$CONFIG_SAVED"
fi

# Pull latest dev
cd "$REPO_DIR"
git fetch --depth=1 origin dev
PREV=$(git rev-parse HEAD)
git reset --hard origin/dev
NEW=$(git rev-parse HEAD)

if [ "$PREV" = "$NEW" ]; then
    echo "No changes since last build ($NEW), skipping."
    exit 0
fi

echo "New commits since $PREV, building $NEW..."

# Clean previous dist so stale files don't get deployed on partial build
rm -rf "$BUILD_DIR"

# Build — cap at 896MB to stay within 1GB RAM + swap headroom
export NODE_OPTIONS='--max_old_space_size=896'
npm ci 2>&1 | tail -5
npm run build 2>&1 | tail -10

# Verify build actually produced output before touching web root
if [ ! -f "$BUILD_DIR/index.html" ]; then
    echo "ERROR: Build failed — dist/index.html missing. Web root untouched."
    exit 1
fi

# Deploy only now that we know the build succeeded
rm -rf "$WEB_ROOT"/*
cp -r "$BUILD_DIR"/* "$WEB_ROOT/"

# Restore config
if [ -f "$CONFIG_SAVED" ]; then
    cp "$CONFIG_SAVED" "$WEB_ROOT/config.json"
else
    echo "WARNING: No saved config found — default config from build will be used."
fi

nginx -s reload
echo "=== Deploy complete: $NEW ==="