#!/usr/bin/env bash

# community-scripts ORG | phpMyAdmin Installer
# Author: MickLesk
# License: MIT

function header_info {
    clear
    cat <<"EOF"
    ____  __          __  ___      ___       __          _
   / __ \/ /_  ____  /  |/  /_  __/   | ____/ /___ ___  (_)___
  / /_/ / __ \/ __ \/ /|_/ / / / / /| |/ __  / __ `__ \/ / __ \
 / ____/ / / / /_/ / /  / / /_/ / ___ / /_/ / / / / / / / / / /
/_/   /_/ /_/ .___/_/  /_/\__, /_/  |_\__,_/_/ /_/ /_/_/_/ /_/
           /_/           /____/
EOF
}

YW=$(echo "\033[33m")
GN=$(echo "\033[1;92m")
RD=$(echo "\033[01;31m")
BL=$(echo "\033[36m")
CL=$(echo "\033[m")
CM="${GN}✔️${CL}"
CROSS="${RD}✖️${CL}"
INFO="${BL}ℹ️${CL}"

APP="phpMyAdmin"
INSTALL_DIR_DEBIAN="/var/www/html/phpMyAdmin"
INSTALL_DIR_ALPINE="/usr/share/phpmyadmin"

IFACE=$(ip -4 route | awk '/default/ {print $5; exit}')
IP=$(ip -4 addr show "$IFACE" | awk '/inet / {print $2}' | cut -d/ -f1 | head -n 1)
[[ -z "$IP" ]] && IP=$(hostname -I | awk '{print $1}')
[[ -z "$IP" ]] && IP="127.0.0.1"

# Detect OS
if [[ -f "/etc/alpine-release" ]]; then
    OS="Alpine"
    PKG_MANAGER_INSTALL="apk add --no-cache"
    PKG_QUERY="apk info -e"
    INSTALL_DIR="$INSTALL_DIR_ALPINE"
elif [[ -f "/etc/debian_version" ]]; then
    OS="Debian"
    PKG_MANAGER_INSTALL="apt-get install -y"
    PKG_QUERY="dpkg -l"
    INSTALL_DIR="$INSTALL_DIR_DEBIAN"
else
    echo -e "${CROSS} Unsupported OS detected. Exiting."
    exit 1
fi

header_info

function msg_info() { echo -e "${INFO} ${YW}${1}...${CL}"; }
function msg_ok() { echo -e "${CM} ${GN}${1}${CL}"; }
function msg_error() { echo -e "${CROSS} ${RD}${1}${CL}"; }

function check_internet() {
    msg_info "Checking Internet connectivity to GitHub"
    HTTP_CODE=$(curl -s -o /dev/null -w "%{http_code}" https://github.com)
    if [[ "$HTTP_CODE" -ge 200 && "$HTTP_CODE" -lt 400 ]]; then
        msg_ok "Internet connectivity OK"
    else
        msg_error "Internet connectivity or GitHub unreachable (Status $HTTP_CODE). Exiting."
        exit 1
    fi
}

function is_phpmyadmin_installed() {
    if [[ "$OS" == "Debian" ]]; then
        [[ -f "$INSTALL_DIR/config.inc.php" ]]
    else
        [[ -d "$INSTALL_DIR" ]] && rc-service lighttpd status &>/dev/null
    fi
}

function install_php_and_modules() {
    msg_info "Checking existing PHP installation"
    if command -v php >/dev/null 2>&1; then
        PHP_VERSION=$(php -r 'echo PHP_VERSION;')
        msg_ok "Found PHP version $PHP_VERSION"
    else
        msg_info "PHP not found, will install PHP core"
    fi

    if [[ "$OS" == "Debian" ]]; then
        PHP_MODULES=("php" "php-mysqli" "php-mbstring" "php-zip" "php-gd" "php-json" "php-curl")
        MISSING_PACKAGES=()
        for pkg in "${PHP_MODULES[@]}"; do
            if ! dpkg -l | grep -qw "$pkg"; then
                MISSING_PACKAGES+=("$pkg")
            fi
        done
        if [[ ${#MISSING_PACKAGES[@]} -gt 0 ]]; then
            msg_info "Installing missing PHP packages: ${MISSING_PACKAGES[*]}"
            if ! apt-get update &>/dev/null || ! apt-get install -y "${MISSING_PACKAGES[@]}" &>/dev/null; then
                msg_error "Failed to install required PHP modules. Exiting."
                exit 1
            fi
            msg_ok "Installed missing PHP packages"
        else
            msg_ok "All required PHP modules are already installed"
        fi
    else
        msg_info "Installing Lighttpd and PHP for Alpine"
        $PKG_MANAGER_INSTALL lighttpd php php-fpm php-session php-json php-mysqli curl tar openssl &>/dev/null
        msg_ok "Installed Lighttpd and PHP"
    fi
}

function install_phpmyadmin() {
    msg_info "Fetching latest phpMyAdmin release from GitHub"
    LATEST_VERSION_RAW=$(curl -s https://api.github.com/repos/phpmyadmin/phpmyadmin/releases/latest | grep tag_name | cut -d '"' -f4)
    LATEST_VERSION=$(echo "$LATEST_VERSION_RAW" | sed -e 's/^RELEASE_//' -e 's/_/./g')
    if [[ -z "$LATEST_VERSION" ]]; then
        msg_error "Could not determine latest phpMyAdmin version from GitHub – falling back to 5.2.2"
        LATEST_VERSION="RELEASE_5_2_2"
    fi
    msg_ok "Latest version: $LATEST_VERSION"

    TARBALL_URL="https://files.phpmyadmin.net/phpMyAdmin/${LATEST_VERSION}/phpMyAdmin-${LATEST_VERSION}-all-languages.tar.gz"
    msg_info "Downloading ${TARBALL_URL}"
    if ! curl -fsSL "$TARBALL_URL" -o /tmp/phpmyadmin.tar.gz; then
        msg_error "Download failed: $TARBALL_URL"
        exit 1
    fi

    mkdir -p "$INSTALL_DIR"
    tar xf /tmp/phpmyadmin.tar.gz --strip-components=1 -C "$INSTALL_DIR"
}

function configure_phpmyadmin() {
    if [[ "$OS" == "Debian" ]]; then
        cp "$INSTALL_DIR/config.sample.inc.php" "$INSTALL_DIR/config.inc.php"
        SECRET=$(openssl rand -base64 24)
        sed -i "s#\$cfg\['blowfish_secret'\] = '';#\$cfg['blowfish_secret'] = '${SECRET}';#" "$INSTALL_DIR/config.inc.php"
        chmod 660 "$INSTALL_DIR/config.inc.php"
        chown -R www-data:www-data "$INSTALL_DIR"
        systemctl restart apache2
        msg_ok "Configured phpMyAdmin with Apache"
    else
        msg_info "Configuring Lighttpd for phpMyAdmin (Alpine detected)"

        mkdir -p /etc/lighttpd
        cat <<EOF >/etc/lighttpd/lighttpd.conf
server.modules = (
    "mod_access",
    "mod_alias",
    "mod_accesslog",
    "mod_fastcgi"
)

server.document-root = "${INSTALL_DIR}"
server.port = 80

index-file.names = ( "index.php", "index.html" )

fastcgi.server = ( ".php" =>
  ((
    "host" => "127.0.0.1",
    "port" => 9000,
    "check-local" => "disable"
  ))
)

alias.url = ( "/phpMyAdmin/" => "${INSTALL_DIR}/" )

accesslog.filename = "/var/log/lighttpd/access.log"
server.errorlog = "/var/log/lighttpd/error.log"
EOF

        msg_info "Starting PHP-FPM and Lighttpd"

        PHP_VERSION=$(php -r 'echo PHP_MAJOR_VERSION . PHP_MINOR_VERSION;')
        PHP_FPM_SERVICE="php-fpm${PHP_VERSION}"

        if $STD rc-service "$PHP_FPM_SERVICE" start && $STD rc-update add "$PHP_FPM_SERVICE" default; then
            msg_ok "Started PHP-FPM service: $PHP_FPM_SERVICE"
        else
            msg_error "Failed to start PHP-FPM service: $PHP_FPM_SERVICE"
            exit 1
        fi

        $STD rc-service lighttpd start
        $STD rc-update add lighttpd default
        msg_ok "Configured and started Lighttpd successfully"

    fi
}

function uninstall_phpmyadmin() {
    msg_info "Stopping Webserver"
    if [[ "$OS" == "Debian" ]]; then
        systemctl stop apache2
    else
        $STD rc-service lighttpd stop
        $STD rc-service php-fpm stop
    fi

    msg_info "Removing phpMyAdmin directory"
    rm -rf "$INSTALL_DIR"

    if [[ "$OS" == "Alpine" ]]; then
        msg_info "Removing Lighttpd config"
        rm -f /etc/lighttpd/lighttpd.conf
        $STD rc-service php-fpm restart
        $STD rc-service lighttpd restart
    else
        $STD systemctl restart apache2
    fi
    msg_ok "Uninstalled phpMyAdmin"
}

function update_phpmyadmin() {
    msg_info "Fetching latest phpMyAdmin release from GitHub"
    LATEST_VERSION_RAW=$(curl -s https://api.github.com/repos/phpmyadmin/phpmyadmin/releases/latest | grep tag_name | cut -d '"' -f4)
    LATEST_VERSION=$(echo "$LATEST_VERSION_RAW" | sed -e 's/^RELEASE_//' -e 's/_/./g')

    if [[ -z "$LATEST_VERSION" ]]; then
        msg_error "Could not determine latest phpMyAdmin version from GitHub – falling back to 5.2.2"
        LATEST_VERSION="5.2.2"
    fi
    msg_ok "Latest version: $LATEST_VERSION"

    TARBALL_URL="https://files.phpmyadmin.net/phpMyAdmin/${LATEST_VERSION}/phpMyAdmin-${LATEST_VERSION}-all-languages.tar.gz"
    msg_info "Downloading ${TARBALL_URL}"

    if ! curl -fsSL "$TARBALL_URL" -o /tmp/phpmyadmin.tar.gz; then
        msg_error "Download failed: $TARBALL_URL"
        exit 1
    fi

    BACKUP_DIR="/tmp/phpmyadmin-backup-$(date +%Y%m%d-%H%M%S)"
    mkdir -p "$BACKUP_DIR"
    BACKUP_ITEMS=("config.inc.php" "upload" "save" "tmp" "themes")

    msg_info "Backing up existing phpMyAdmin data"
    for item in "${BACKUP_ITEMS[@]}"; do
        [[ -e "$INSTALL_DIR/$item" ]] && cp -a "$INSTALL_DIR/$item" "$BACKUP_DIR/" && echo "  ↪︎ $item"
    done
    msg_ok "Backup completed: $BACKUP_DIR"

    tar xf /tmp/phpmyadmin.tar.gz --strip-components=1 -C "$INSTALL_DIR"
    msg_ok "Extracted phpMyAdmin $LATEST_VERSION"

    msg_info "Restoring preserved files"
    for item in "${BACKUP_ITEMS[@]}"; do
        [[ -e "$BACKUP_DIR/$item" ]] && cp -a "$BACKUP_DIR/$item" "$INSTALL_DIR/" && echo "  ↪︎ $item restored"
    done
    msg_ok "Restoration completed"

    configure_phpmyadmin
}

if is_phpmyadmin_installed; then
    echo -e "${YW}⚠️ ${APP} is already installed at ${INSTALL_DIR}.${CL}"
    read -r -p "Would you like to Update (1), Uninstall (2) or Cancel (3)? [1/2/3]: " action
    action="${action//[[:space:]]/}" # Eingabe bereinigen
    case "$action" in
    1)
        check_internet
        update_phpmyadmin
        ;;
    2)
        uninstall_phpmyadmin
        ;;
    3)
        echo -e "${YW}⚠️ Action cancelled. Exiting.${CL}"
        exit 0
        ;;
    *)
        echo -e "${YW}⚠️ Invalid input. Exiting.${CL}"
        exit 1
        ;;
    esac
else
    read -r -p "Would you like to install ${APP}? (y/n): " install_prompt
    install_prompt="${install_prompt//[[:space:]]/}" # Eingabe bereinigen
    if [[ "${install_prompt,,}" =~ ^(y|yes)$ ]]; then
        check_internet
        install_php_and_modules
        install_phpmyadmin
        configure_phpmyadmin
        if [[ "$OS" == "Debian" ]]; then
            echo -e "${CM} ${GN}${APP} is reachable at: ${BL}http://${IP}/phpMyAdmin${CL}"
        else
            echo -e "${CM} ${GN}${APP} is reachable at: ${BL}http://${IP}/${CL}"
        fi
    else
        echo -e "${YW}⚠️ Installation skipped. Exiting.${CL}"
        exit 0
    fi
fi