#!/bin/bash
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PACKAGES_FILE="$SCRIPT_DIR/packages.txt"

# ---------------------------------------------------------------------------
# Read packages.txt, split into pacman / aur / npm sections.
# ---------------------------------------------------------------------------
read_packages() {
    local section="pacman"
    local current
    current=""
    while IFS= read -r line || [[ -n "$line" ]]; do
        current="${line%%#*}"
        current="${current##*( )}"
        current="${current%%*( )}"
        [[ -z "$current" ]] && continue
        case "$current" in
            @pacman) section="pacman" ;;
            @aur)    section="aur" ;;
            @npm)    section="npm" ;;
            *)
                case "$section" in
                    pacman) pacman_pkgs+=("$current") ;;
                    aur)    aur_pkgs+=("$current") ;;
                    npm)    npm_pkgs+=("$current") ;;
                esac
                ;;
        esac
    done < "$PACKAGES_FILE"
}

declare -a pacman_pkgs=() aur_pkgs=() npm_pkgs=()

# ---------------------------------------------------------------------------
# Install sections.
# ---------------------------------------------------------------------------
install_pacman() {
    if ((${#pacman_pkgs[@]})); then
        echo "==> Installiere Pacman-Pakete: ${pacman_pkgs[*]}"
        yay -S --needed "${pacman_pkgs[@]}"
    fi
}

install_aur() {
    if ((${#aur_pkgs[@]})); then
        echo "==> Installiere AUR-Pakete: ${aur_pkgs[*]}"
        yay -S --needed "${aur_pkgs[@]}"
    fi
}

install_npm() {
    if ((${#npm_pkgs[@]})); then
        echo "==> Installiere globale npm-Pakete: ${npm_pkgs[*]}"
        # Arch installiert npm nach /usr/lib/node_modules (root-owned),
        # daher braucht der globale Install sudo.
        sudo npm install -g "${npm_pkgs[@]}"
    fi
}

# ---------------------------------------------------------------------------
# Post-install configuration.
# ---------------------------------------------------------------------------
set_fish_default_shell() {
    if command -v fish >/dev/null 2>&1; then
        if [[ "$SHELL" != "/usr/bin/fish" ]]; then
            echo "Setze fish als Standard-Shell ..."
            chsh -s /usr/bin/fish
        else
            echo "fish ist bereits die Standard-Shell."
        fi
    else
        echo "Warnung: fish wurde nicht installiert; ueberspringe chsh."
    fi
}

install_tmuxifier() {
    if [[ -d "$HOME/.tmuxifier" ]]; then
        echo "tmuxifier bereits installiert; fahre fort."
    else
        echo "Klone tmuxifier ..."
        git clone https://github.com/jimeh/tmuxifier.git "$HOME/.tmuxifier"
    fi
}

install_tmux_tpm() {
    if [[ -x "$HOME/.config/tmux/plugins/tpm/tpm" ]]; then
        echo "tmux TPM bereits installiert; fahre fort."
    else
        echo "Klone tmux TPM ..."
        mkdir -p "$HOME/.config/tmux/plugins"
        git clone https://github.com/tmux-plugins/tpm "$HOME/.config/tmux/plugins/tpm"
    fi
}

install_tmux_plugins() {
    local tpm_install="$HOME/.config/tmux/plugins/tpm/bin/install_plugins"
    if ! command -v tmux >/dev/null 2>&1; then
        echo "Warnung: tmux nicht installiert; ueberspringe Plugin-Installation (C-Space I beim ersten Start)."
        return 0
    fi
    if ! command -v git >/dev/null 2>&1; then
        echo "Warnung: git nicht installiert; ueberspringe tmux Plugin-Installation."
        return 0
    fi
    if [[ ! -f "$HOME/.config/tmux/tmux.conf" ]]; then
        echo "tmux.conf noch nicht verlinkt (stow laeuft nach setup.sh); Plugins werden beim ersten tmux-Start bzw. Re-Run installiert (C-Space I)."
        return 0
    fi
    if [[ ! -x "$tpm_install" ]]; then
        echo "Warnung: TPM install_plugins nicht gefunden; ueberspringe tmux Plugin-Installation."
        return 0
    fi
    echo "Installiere tmux-Plugins via TPM ..."
    "$tpm_install"
}

add_yazi_git_plugin() {
    if command -v yazi >/dev/null 2>&1 && command -v ya >/dev/null 2>&1; then
        if ya pkg list 2>/dev/null | grep -q 'yazi-rs/plugins:git'; then
            echo "yazi git-Plugin bereits installiert; fahre fort."
        else
            echo "Fuege yazi git-Plugin hinzu ..."
            ya pkg add yazi-rs/plugins:git
        fi
    fi
}

# ---------------------------------------------------------------------------
# Main
# ---------------------------------------------------------------------------
main() {
    # Hinweis: multilib, yay und das System-Update werden von
    # basic/setup.sh uebernommen (laeuft vor term im Makefile).
    echo "==> Lese Paketliste: $PACKAGES_FILE"
    read_packages

    install_pacman
    install_aur
    install_npm

    set_fish_default_shell
    install_tmuxifier
    install_tmux_tpm
    install_tmux_plugins
    add_yazi_git_plugin

    echo "==> Aktualisiere locate-Datenbank ..."
    sudo updatedb

    echo "Fertig. Starte ein neues Terminal, damit fish und die Umgebung greifen."
}

main