#!/usr/bin/env bash
set -euo pipefail
export DEBIAN_FRONTEND=noninteractive

echo "========================================================="
echo " 1. Updating System Package Repositories..."
echo "========================================================="
if command -v apt-get >/dev/null; then
    sudo apt-get update -y
elif command -v pacman >/dev/null; then
    sudo pacman -Sy --noconfirm
elif command -v apk >/dev/null; then
    sudo apk update
elif command -v dnf >/dev/null; then
    sudo dnf makecache
elif command -v zypper >/dev/null; then
    sudo zypper refresh
elif command -v brew >/dev/null; then
    brew update
fi

echo "========================================================="
echo " 2. Ensuring Git is Installed..."
echo "========================================================="
if ! command -v git >/dev/null; then
    echo "[+] Installing git..."
    if command -v apt-get >/dev/null; then
        sudo apt-get install -y git
    elif command -v pacman >/dev/null; then
        sudo pacman -S --noconfirm git
    elif command -v apk >/dev/null; then
        sudo apk add git
    elif command -v dnf >/dev/null; then
        sudo dnf install -y git
    elif command -v yum >/dev/null; then
        sudo yum install -y git
    elif command -v zypper >/dev/null; then
        sudo zypper install -y git
    elif command -v brew >/dev/null; then
        brew install git
    fi
else
    echo "[+] Git is already installed."
fi

# Detect hostname robustly without external 'hostname' command dependency
if command -v hostname >/dev/null; then
    MY_HOSTNAME=$(hostname)
elif [[ -f /proc/sys/kernel/hostname ]]; then
    MY_HOSTNAME=$(cat /proc/sys/kernel/hostname)
elif [[ -f /etc/hostname ]]; then
    MY_HOSTNAME=$(cat /etc/hostname)
else
    MY_HOSTNAME="${HOSTNAME:-unknown-host}"
fi

# 3. Setup secure .ssh directory
KEY_NAME="alz@${MY_HOSTNAME}"
KEY_PATH="$HOME/.ssh/$KEY_NAME"
mkdir -p ~/.ssh && chmod 700 ~/.ssh

# 4. Securely prompt for the private key interactively (handling multi-line input)
echo "========================================================="
echo "Please paste your private SSH key for Codeberg."
echo "Press [Enter] then [Ctrl+D] on a new line to finish:"
echo "========================================================="
cat > "$KEY_PATH"
chmod 600 "$KEY_PATH"

# 5. Add Codeberg host key and configure SSH
ssh-keyscan codeberg.org >> ~/.ssh/known_hosts 2>/dev/null
cat << EOF >> ~/.ssh/config

Host codeberg.org
    HostName codeberg.org
    User git
    IdentityFile $KEY_PATH
    IdentitiesOnly yes
EOF
chmod 600 ~/.ssh/config

# 6. Clone dotfiles to clean, visible ~/dotfiles folder (no leading dot)
echo "========================================================="
echo " 3. Cloning Dotfiles Repository..."
echo "========================================================="
git clone ssh://git@codeberg.org/axell/dotfiles.git ~/dotfiles

# 7. Run the installer
echo "========================================================="
echo " 4. Running Dotfiles Installer..."
echo "========================================================="
bash ~/dotfiles/install.sh