#!/usr/bin/env bash
set -euo pipefail

# -------------------------------------
# CONFIGURATION
# -------------------------------------
TEMPLATE_REPO="https://gitea.ramoncaballero.dev/mon/PHPStarter.git"
SITES_DIR="/var/www/sites"
APACHE_SITES_AVAILABLE="/etc/apache2/sites-available"
APACHE_SERVICE="apache2"

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
VHOST_TEMPLATE="$SCRIPT_DIR/vhost-template.conf"

# -------------------------------------
# FUNCTIONS
# -------------------------------------

error() {
    echo "ERROR: $*" >&2
    exit 1
}

require_cmd() {
    command -v "$1" >/dev/null 2>&1 || error "Required command '$1' not found"
}

# -------------------------------------
# PRECHECKS
# -------------------------------------

require_cmd git
require_cmd sed
require_cmd mariadb
require_cmd openssl
require_cmd a2ensite
require_cmd systemctl
require_cmd logname
require_cmd composer

[ -f "$VHOST_TEMPLATE" ] || error "Virtual host template not found at $VHOST_TEMPLATE"
[ -d "$SITES_DIR" ] || error "Sites directory not found at $SITES_DIR"

# -------------------------------------
# INPUT
# -------------------------------------

if [ $# -lt 1 ]; then
    echo "Usage: sudo $0 <website-name>"
    exit 1
fi

WEBSITE_NAME="$1"
WEBSITE_DIR="$SITES_DIR/$WEBSITE_NAME"
VHOST_CONF="$APACHE_SITES_AVAILABLE/$WEBSITE_NAME.conf"

if [ -d "$WEBSITE_DIR" ]; then
    error "Directory $WEBSITE_DIR already exists"
fi

if [ -f "$VHOST_CONF" ]; then
    error "VHost $VHOST_CONF already exists"
fi

REAL_USER="$(logname)"

# -------------------------------------
# CLONE TEMPLATE
# -------------------------------------

echo "Creating website directory at $WEBSITE_DIR..."
mkdir -p "$WEBSITE_DIR"

echo "Cloning PHPStarter template..."
git clone "$TEMPLATE_REPO" "$WEBSITE_DIR"

echo "Removing template Git history..."
rm -rf "$WEBSITE_DIR/.git"

# -------------------------------------
# COPY ENV EXAMPLE BEFORE PLACEHOLDER REPLACEMENT
# -------------------------------------

EXAMPLE_ENV_PHPSTARTER="$WEBSITE_DIR/config/PHPStarter.env.example"
EXAMPLE_ENV_WEBSITE="$WEBSITE_DIR/config/${WEBSITE_NAME}.env.example"

if [ -f "$EXAMPLE_ENV_WEBSITE" ]; then
    EXAMPLE_ENV="$EXAMPLE_ENV_WEBSITE"
elif [ -f "$EXAMPLE_ENV_PHPSTARTER" ]; then
    EXAMPLE_ENV="$EXAMPLE_ENV_PHPSTARTER"
else
    EXAMPLE_ENV=""
fi

ENV_FILE="$WEBSITE_DIR/config/${WEBSITE_NAME}.env"

if [ -n "$EXAMPLE_ENV" ]; then
    echo "Creating env file from example: $EXAMPLE_ENV -> $ENV_FILE"
    cp "$EXAMPLE_ENV" "$ENV_FILE"
else
    echo "No env example found, skipping env copy."
fi

# -------------------------------------
# REPLACE PLACEHOLDERS (CONTENT ONLY)
# -------------------------------------

echo "Replacing PHPStarter placeholders with $WEBSITE_NAME..."
grep -rIl "PHPStarter" "$WEBSITE_DIR" \
    | grep -v "\.example$" \
    | while read -r file; do
        sed -i "s/PHPStarter/$WEBSITE_NAME/g" "$file"
    done

# -------------------------------------
# RENAME CSS/JS FILES
# -------------------------------------

CSS_OLD="$WEBSITE_DIR/public/css/PHPStarter.css"
CSS_NEW="$WEBSITE_DIR/public/css/${WEBSITE_NAME}.css"

JS_OLD="$WEBSITE_DIR/public/js/PHPStarter.js"
JS_NEW="$WEBSITE_DIR/public/js/${WEBSITE_NAME}.js"

[ -f "$CSS_OLD" ] && mv "$CSS_OLD" "$CSS_NEW"
[ -f "$JS_OLD" ] && mv "$JS_OLD" "$JS_NEW"

# -------------------------------------
# PERMISSIONS BEFORE COMPOSER
# -------------------------------------

echo "Setting permissions so Composer can write vendor/..."
chown -R "$REAL_USER:www-data" "$WEBSITE_DIR"
find "$WEBSITE_DIR" -type d -exec chmod 775 {} \;
find "$WEBSITE_DIR" -type f -exec chmod 664 {} \;

# -------------------------------------
# COMPOSER INSTALL (RUN AS REAL USER)
# -------------------------------------

echo "Running composer install as $REAL_USER..."
sudo -u "$REAL_USER" composer install --no-dev --optimize-autoloader --working-dir="$WEBSITE_DIR"

# -------------------------------------
# DATABASE SETUP
# -------------------------------------

DB_USER="${WEBSITE_NAME}_user"
DB_NAME="$WEBSITE_NAME"
DB_PASS="$(openssl rand -base64 16)"

DB_SQL="$WEBSITE_DIR/config/database.sql"

if [ ! -f "$DB_SQL" ]; then
    echo "No database.sql found, skipping DB creation."
else
    echo "Injecting generated DB password into SQL file..."
    sed -i "s/IDENTIFIED BY ''/IDENTIFIED BY '$DB_PASS'/" "$DB_SQL"

    echo "Enter MariaDB root password to create database..."
    read -rsp "MariaDB root password: " MYSQL_ROOT_PASSWORD
    echo

    echo "Running SQL file..."
    if ! mariadb -u root -p"$MYSQL_ROOT_PASSWORD" < "$DB_SQL"; then
        error "Failed to apply database.sql"
    fi
fi

# -------------------------------------
# UPDATE ENV FILE
# -------------------------------------

if [ -f "$ENV_FILE" ]; then
    echo "Updating environment file..."
    sed -i "s/^DB_USER=.*/DB_USER=$DB_USER/" "$ENV_FILE" || true
    sed -i "s/^DB_PASS=.*/DB_PASS=$DB_PASS/" "$ENV_FILE" || true
    sed -i "s/^DB_NAME=.*/DB_NAME=$DB_NAME/" "$ENV_FILE" || true
fi

# -------------------------------------
# VIRTUAL HOST
# -------------------------------------

echo "Creating virtual host..."
cp "$VHOST_TEMPLATE" "$VHOST_CONF"
sed -i "s/PHPStarter/$WEBSITE_NAME/g" "$VHOST_CONF"

echo "Enabling site..."
a2ensite "$WEBSITE_NAME.conf"

echo "Reloading Apache..."
systemctl reload "$APACHE_SERVICE"

# -------------------------------------
# FINAL PERMISSIONS
# -------------------------------------

echo "Re-applying ownership and permissions..."
chown -R "$REAL_USER:www-data" "$WEBSITE_DIR"
find "$WEBSITE_DIR" -type d -exec chmod 775 {} \;
find "$WEBSITE_DIR" -type f -exec chmod 664 {} \;

# -------------------------------------
# HOSTS FILE ENTRY
# -------------------------------------

HOST_ENTRY="127.0.0.1	${WEBSITE_NAME}.local"

echo "Adding hosts entry for ${WEBSITE_NAME}.local..."

if ! grep -q "${WEBSITE_NAME}.local" /etc/hosts; then
    echo "$HOST_ENTRY" | sudo tee -a /etc/hosts >/dev/null
    echo "Added hosts entry: $HOST_ENTRY"
else
    echo "Hosts entry already exists, skipping."
fi

# -------------------------------------
# DONE
# -------------------------------------

echo
echo "Website created successfully!"
echo "Path: $WEBSITE_DIR"
echo "URL:  http://${WEBSITE_NAME}.local"
echo "DB user: $DB_USER"
echo "DB name: $DB_NAME"
echo "DB pass: $DB_PASS"
echo