h2mm-cli/h2mm

#!/bin/bash

H2PATH="./h2path"
MODS_DIR=""
DB_FILE=""

function find_game_directory() {
    local search_dir="/"
    local target_dir="Steam/steamapps/common/Helldivers\ 2/data"

    # check if path is saved
    if [[ -f "$H2PATH" ]]; then
        saved_dir=$(cat "$H2PATH")
        if [[ -d "$saved_dir" ]]; then
            echo "Using saved game directory: $saved_dir" >&2
            echo "$saved_dir"
            return
        else
            echo "Saved game directory is invalid"
        fi
    fi

    # first time setup, or directory is not valid anymore
    echo "Searching for the Helldivers 2 data directory..." >&2
    game_dir=$(find "$search_dir" -type d -path "*/$target_dir" 2>/dev/null | head -n 1)

    if [[ -z "$game_dir" ]]; then
        echo "Could not find the Helldivers 2 data directory automatically" >&2
        read -p "Please enter the path to the Helldivers 2 data directory: " game_dir
        if [[ ! -d "$game_dir" ]]; then
            echo "Error: Provided path is not a valid directory"
            exit 1
        fi
    fi

    echo "$game_dir" > "$H2PATH"
    echo "Game directory saved to: $H2PATH" >&2
    echo "$game_dir"
}

function initialize_directories() {
    MODS_DIR=$(find_game_directory)
    DB_FILE="$MODS_DIR/mods.csv"

    if [[ ! -f "$DB_FILE" ]]; then
        echo "" > "$DB_FILE"
        echo "Database file created at: $DB_FILE"
    fi
}

function display_help() {
    echo "Helldivers 2 Mod Manager"
    echo "Usage: h2mm [command] [options]"
    echo "Commands:"
    echo "  install -n \"<mod_name>\" <mod_files>       Install a mod with a name and files"
    echo "  list                                        List all installed mods"
    echo "  uninstall -n \"<mod_name>\"                 Uninstall a mod by name"
    echo "  uninstall -i <index>                        Uninstall a mod by index"
    echo "Usage:"
    echo "  h2mm install -n \"Cool mod\" a5f2c029522e6714.patch_0 a5f2c029522e6714.patch_0.stream"
    echo "  h2mm uninstall -n \"Cool mod\""
    echo "  h2mm uninstall -i 1"
}

function install_mod() {
    local mod_name=""
    local mod_files=()

    # parse arguments
    while [[ $# -gt 0 ]]; do
        case "$1" in
            -n)
                mod_name="$2"
                shift 2
                ;;
            *)
                mod_files+=("$1")
                shift
                ;;
        esac
    done

    if [[ -z "$mod_name" || ${#mod_files[@]} -eq 0 ]]; then
        echo "Error: Mod name and files are required."
        exit 1
    fi

    # verify mod files exist
    for file in "${mod_files[@]}"; do
        if [[ ! -f "$file" ]]; then
            echo "Error: File $file does not exist."
            exit 1
        fi
    done

    declare -A patch_count
    for file in "${mod_files[@]}"; do
        base_name=$(echo "$file" | sed -E 's/\.+.*//')
        patch_prefix="$MODS_DIR/${base_name}.patch_"
        count=$(ls "${patch_prefix}"* | grep -E '([0-9]+$)' 2>/dev/null | wc -l)
        if [[ -z "${patch_count[$base_name]+unset}" ]]; then 
            patch_count["$base_name"]=$count
        fi

        extension=$(echo "$file" | sed -E 's/*.patch_[0-9]+//')
        target_file="$MODS_DIR/${base_name}.patch_${patch_count[$base_name]}${extension}"

        cp "$file" "$target_file"
        echo "Mod file $file installed at: $target_file"
    done

    # add entry to database
    echo "$(($(wc -l < "$DB_FILE") + 1)),$mod_name,${mod_files[*]}" >> "$DB_FILE"
    echo "Mod '$mod_name' installed successfully."
}

function list_mods() {
    if [[ ! -s "$DB_FILE" ]]; then
        echo "No mods installed."
        return
    fi

    echo "Installed Mods:"
    cat "$DB_FILE"
}

function uninstall_mod() {
    exit 1
}

# main

if [[ $# -lt 1 ]]; then
    display_help
    exit 1
fi

command="$1"
shift

initialize_directories

case "$command" in
    install)
        install_mod "$@"
        ;;
    list)
        list_mods
        ;;
    uninstall)
        uninstall_mod "$@"
        ;;
    *)
        display_help
        ;;
esac