#!/usr/bin/env bash

# uni2asc - Convert specific Unicode characters to ASCII equivalents
# Usage: uni2asc input.txt [output.txt]

# Set your preferred editor (change xed to vim, nano, etc.)
EDITOR="xed"

if [[ "$1" == "-h" || "$1" == "--help" || $# -eq 0 ]]; then
    echo ""
    echo " .-------------------------------------------------------------------."
    echo " | uni2asc - Converts common Unicode characters into their ASCII     |"
    echo " |           equivalents using sed.                                  |"
    echo " |                                                                   |"
    echo " | USAGE:                                                            |"
    echo " |   uni2asc <input-file>               (Prints to screen)           |"
    echo " |   uni2asc <input-file> <output-file> (Saves to file)              |"
    echo " |   uni2asc --edit                     (Edit this script)           |"
    echo " |   uni2asc --help                     (Displays this help)         |"
    echo " |                                                                   |"
    echo " | ----------------------------------------------------------------- |"
    echo " |   Blue Oak Model License 1.0.0 | (c) 2026 - 640kb.neocities.org   |"
    echo " '-------------------------------------------------------------------'"
    echo ""
    exit 0
fi

if [[ "$1" == "--edit" ]]; then
    "$EDITOR" "$0"
    exit 0
fi

input="$1"
output="$2"

if [[ ! -f "$input" ]]; then
    echo ""
    echo " Error: Input file '$input' not found" >&2
    echo ""
    exit 1
fi

export LC_ALL=${LC_ALL:-en_US.UTF-8}

# --- Streaming Unicode -> ASCII conversion ---
sed_script='
s/“/"/g
s/”/"/g
s/‘/'\''/g
s/’/'\''/g
s/—/-/g
s/–/-/g
s/…/.../g
s/•/*/g
s/´/'\''/g

s/©/(C)/g
s/®/(R)/g
s/™/(TM)/g
s/°/deg/g
s/→/->/g

s/é/e/g
s/ñ/n/g
s/ç/c/g

s/┌/./g
s/┐/./g
s/└/'\''/g
s/┘/'\''/g
s/│/|/g
s/─/-/g
s/├/+/g
s/┤/+/g
s/┼/+/g

s/✓/[OK]/g
s/✔/[OK]/g
s/✗/[X]/g
s/✘/[X]/g
s/×/x/g
s/÷/\//g
'

if [[ -n "$output" ]]; then
    sed "$sed_script" "$input" > "$output"
    echo ""
    echo " Converted: $input -> $output" >&2
    echo ""
else
    sed "$sed_script" "$input"
fi