export ALIASES_FILE="$XDG_CONFIG_HOME"/aliasesrc

function mal {
    # Use fzf to allow the user to select an alias from the aliases file
    function _execute_alias {
        local alias_to_execute=$(cut -d' ' -f2- "$ALIASES_FILE" | fzf)

        # Check if the user cancelled the selection
        test -z $alias_to_execute && return 1

        echo "Executing alias: $alias_to_execute"
        # Execute the selected alias
        eval ${alias_to_execute%%=*}
        return 0
    }

    # Delete an existing alias by selecting it from a list
    function _interactive_delete {
        local alias_to_delete=$(cut -d' ' -f2- "$ALIASES_FILE" | fzf)

        # Check if the user cancelled the selection
        test -z $alias_to_delete && return 1

        echo "Deleted alias: $alias_to_delete"
        # Delete the selected alias from the aliases file
        sed -i "/^alias ${alias_to_delete%%=*}=/d" "$ALIASES_FILE"
        unalias ${alias_to_delete%%=*}
    }

    # Delete an existing alias using specified name
    function _parameter_delete {
        local alias_to_delete=$1
        local line_with_alias=$(grep "$1=" "$ALIASES_FILE")

        # Check if the alias exists in the aliases file
        if test -z "$line_with_alias"; then
            echo "No alias with the name $1 found."
            return 2
        fi

        echo "Deleted alias: $alias_to_delete"
        # Delete the selected alias from the aliases file
        sed -i "/^alias ${alias_to_delete%%=*}=/d" "$ALIASES_FILE"
        unalias ${alias_to_delete%%=*}
    }

    # Rename an existing alias by selecting it from a list
    function _interactive_rename {
        local alias_to_rename=$(cut -d' ' -f2- "$ALIASES_FILE" | fzf)

        # Check if the user cancelled the selection
        test -z $alias_to_rename && return 1

        echo "Input new name:"
        read new_name
        echo "Renaming alias from $alias_to_rename to $new_name"
        sed -i "s/^alias ${alias_to_rename%%=*}=/alias ${new_name}=/g" "$ALIASES_FILE"
        unalias ${alias_to_rename%%=*}
    }

    # Rename an existing alias using specified old and new names
    function _parameter_rename {
        local old_alias_name=$1
        local new_alias_name=$2
        local line_with_alias=$(grep "^alias ${old_alias_name}=" "$ALIASES_FILE")

        if test -z "$line_with_alias"; then
            echo "No alias with the name $old_alias_name found."
            return 1
        fi

        echo "Renaming alias from $old_alias_name to $new_alias_name"
        sed -i "s/^alias ${old_alias_name}=/alias ${new_alias_name}=/g" "$ALIASES_FILE"
        unalias ${old_alias_name}
    }

    # Change the command associated with an existing alias by selecting it from a list
    function _interactive_command_change {
        local alias_to_change=$(cut -d' ' -f2- "$ALIASES_FILE" | fzf)

        # Check if the user cancelled the selection
        test -z $alias_to_change && return 1

        echo "Input new command:"
        read new_command
        echo "Changing command for alias ${alias_to_change%%=*} to \"$new_command\""
        sed -i "/^alias ${alias_to_change%%=*}=/{s/=.*/=\"$new_command\"/}" "$ALIASES_FILE"
    }

    # Change the command associated with an existing alias using specified name and command
    function _parameter_command_change {
        local alias_to_change=$1
        local new_command="${@:2}"
        local line_with_alias=$(grep "$alias_to_change=" "$ALIASES_FILE")

        if test -z "$line_with_alias"; then
            echo "No alias with the name $alias_to_change found."
            return 1
        fi

        echo "Changing command for alias $alias_to_change to \"$new_command\""
        sed -i "/^alias ${alias_to_change}=/{s/=.*/=\"$new_command\"/}" "$ALIASES_FILE"
    }

    # Add a new alias
    function _add_command {
        local line_with_alias=$(grep "$1=" "$ALIASES_FILE")

        if test ! -z "$line_with_alias"; then
            echo "Alias found: $line_with_alias; change alias by using the -c flag."
            return 1
        fi

        local lh="alias $1"
        local rh=\"${@:2}\"
        local alias_str="$lh=$rh"

        echo $alias_str >>"$ALIASES_FILE"
        echo "added '$alias_str' to .aliases"
    }

    # List all aliases from the aliases file
    function _list_aliases {
        cut -d' ' -f2- "$ALIASES_FILE" | command cat
    }

    # ==============================================================================================================================================================

    action="$1"
    param1="$2"
    param2="$3"

    # Check if the user has provided a help option or no arguments
    helpParams=('-h' '--help' '-help')
    if (($helpParams[(Ie)$action])) || test $# -eq 0; then
        # Display usage information
        echo "Usage: mal [OPTION]... [ALIAS_NAME] [ALIAS_COMMAND]..."
        echo ""
        echo "Create, delete, change, or execute aliases interactively."
        echo ""
        echo "Options:"
        echo "  -h, --help       display this help and exit"
        echo "  -l               list all defined aliases"
        echo "  -e               execute an alias interactively"
        echo "  -d               delete an alias interactively"
        echo "  -dn NAME         delete an alias by name"
        echo "  -r               rename an alias interactively"
        echo "  -rn OLD NEW      rename an existing alias"
        echo "  -c               change the command associated with an existing alias interactively"
        echo "  -cc NAME COMMAND change the command associated with an existing alias by name"
        return 0
    fi

    case "$action" in
        "-e")
            # Execute an alias interactively
            _execute_alias
        ;;
        "-l")
            # List all aliases
            _list_aliases
        ;;
        "-d")
            # Delete an alias interactively
            _interactive_delete
        ;;
        "-dn")
            # Delete an alias using a parameter
            _parameter_delete "$param1"
        ;;
        "-r")
            # rename an alias interactively
            _interactive_rename
        ;;
        "-rn")
            # rename an alias using parameters
            _parameter_rename "$param1" "$param2"
        ;;
        "-c")
            # change a command interactively
            _interactive_command_change
        ;;
        "-cc")
            # change a command using parameters
            _parameter_command_change "$param1" "$param2"
        ;;
        *)
             # add a new command
            _add_command "$action" "$param1"
        ;;
    esac

    # Reload aliases
    source "$ALIASES_FILE"
}