#!/usr/bin/env bash

# Source the script 'common-functions.sh'.
SCRIPT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &>/dev/null && pwd)
ROOT_DIR=$(grep --only-matching "^.*scripts[^/]*" <<<"$SCRIPT_DIR")
source "$ROOT_DIR/common-functions.sh"

_main() {
    local input_files=""
    local output_dir=""

    # Execute initial checks.
    _check_dependencies ""
    _display_wait_box "2"
    input_files=$(_get_files "par_type=file; par_select_mime='image/svg+xml'")
    output_dir=$(_get_output_dir "par_use_same_dir=false")

    # Execute the function '_main_task' for each file in parallel.
    _run_task_parallel "$input_files" "$output_dir"
    _display_result_box "$output_dir"
}

_main_task() {
    local input_file=$1
    local output_dir=$2
    local output_file=""
    local std_output=""
    local temp_file=""
    local new_font="Helvetica"

    __key_remove() {
        local file=$1
        local key=$2

        sed -i "s|$key:[^;\"]*;*||g; s|;\"|\"|g" "$file"
    }

    __key_set_value() {
        local file=$1
        local key=$2
        local value=$3

        sed -i "s|$key:[^;\"]*\([;\"]\)|$key:$value\1|g" "$file"
    }

    # Work on a temporary file.
    temp_file=$(_get_temp_file)
    std_output=$(cp --archive -- "$input_file" "$temp_file" 2>&1)
    _check_output "$?" "$std_output" "$input_file" "" || return 1

    # Run the main process.
    __key_remove "$temp_file" "font-stretch"
    __key_set_value "$temp_file" "font-family" "$new_font"
    __key_set_value "$temp_file" "-inkscape-font-specification" "$new_font"
    _check_output "$?" "$std_output" "$input_file" "" || return 1

    # Move the temporary file to the output.
    output_file=$(_get_output_filename "$input_file" "$output_dir" "par_extension_opt=preserve")
    _move_temp_file_to_output "$input_file" "$temp_file" "$output_file"
}

_main "$@"
