#!/bin/bash

# CHECK BUNDLE EXECUTABLE
# A tool for extracting executable names from macOS app bundles Info.plist

get_executable_name() {
    local plist="$1"
    local value

    value=$(/usr/libexec/PlistBuddy -c "Print :CFBundleExecutable" "$plist" 2>/dev/null)
    if [ $? -eq 0 ] && [ -n "$value" ]; then
        echo "$value"
        return 0
    fi

    local app_dir
    app_dir=$(dirname "$(dirname "$plist")")
    local app_name
    app_name=$(basename "$app_dir" .app)
    if [ -n "$app_name" ] && [ "$app_name" != "Contents" ]; then
        echo "$app_name"
        return 0
    fi

    echo "UNKNOWN"
    return 1
}

process_app() {
    local app_path="$1"
    local exec_name="UNKNOWN"
    local plist
    local found=false

    app_path="${app_path%/}"

    if [[ "$app_path" =~ /Wrapper/.*\.app$ ]]; then
        return
    fi

    if [ -d "$app_path" ]; then
        plist="$app_path/Contents/Info.plist"
        if [ -f "$plist" ]; then
            exec_name=$(get_executable_name "$plist")
            if [ "$exec_name" != "UNKNOWN" ]; then
                found=true
            fi
        fi

        if [ "$found" = false ]; then
            local wrapped_bundle="$app_path/WrappedBundle"
            if [ -L "$wrapped_bundle" ] && [ -d "$wrapped_bundle" ]; then
                plist="$wrapped_bundle/Contents/Info.plist"
                if [ -f "$plist" ]; then
                    exec_name=$(get_executable_name "$plist")
                    if [ "$exec_name" != "UNKNOWN" ]; then
                        found=true
                    fi
                fi
            fi
        fi

        if [ "$found" = false ]; then
            while IFS= read -r nested_plist; do
                exec_name=$(get_executable_name "$nested_plist")
                if [ "$exec_name" != "UNKNOWN" ]; then
                    found=true
                    break
                fi
            done < <(find "$app_path" -name "Info.plist" -path "*/Wrapper/*.app/Contents/Info.plist" 2>/dev/null)
        fi

        if [ "$found" = false ]; then
            while IFS= read -r nested_plist; do
                exec_name=$(get_executable_name "$nested_plist")
                if [ "$exec_name" != "UNKNOWN" ]; then
                    found=true
                    break
                fi
            done < <(find "$app_path" -name "Info.plist" -maxdepth 3 2>/dev/null | grep -E "($app_path/Info.plist|$app_path/Wrapper/.*Info.plist)")
        fi

        echo "$exec_name"
    else
        echo "UNKNOWN" >&2
    fi
}

if [ "$#" -ge 1 ]; then
    for app in "$@"; do
        process_app "$app"
    done
else
    while IFS= read -r line; do
        process_app "$line"
    done
fi