#!/usr/bin/env bash

RED='\033[1;31m'
GREEN='\033[1;32m'
YELLOW='\033[1;33m'
BLUE='\033[1;34m'
RESET='\033[0m'

minjs="dist/script.min.js"
mincss="dist/style.min.css"
minhtml="dist/index.html"

minjs_name="script.min.js"
mincss_name="style.min.css"
minhtml_name="index.html"

title() {
    echo
    echo -e "${BLUE}[*]${RESET} $1"
}

success() {
    echo
    echo -e "${GREEN}[V]${RESET} Done"
    echo
}

check_deps() {
    which "$1" >/dev/null 2>/dev/null
    if [[ $? == 1 ]]; then
        echo -e "${RED}[!]${RESET} $1 is required"
        echo
        exit 1
    fi
}

js_minify() {
    order=('js/anim.js' 'js/script.js' 'js/init.js' 'js/menu.js' 'js/control.js' 'js/handlers.js')
    terser -o "$minjs" ${order[*]}
}

html_minify () {
    html-minifier \
        --collapse-boolean-attributes \
        --collapse-inline-tag-whitespace \
        --collapse-whitespace \
        --remove-attribute-quotes \
        --remove-comments \
        --remove-optional-tags \
        --remove-script-type-attributes \
        --remove-style-link-type-attributes \
        --use-short-doctype \
        -o "$minhtml" \
        "$1"
}

copy_files() {
    exclude=('\.$' '\.git' 'index.html' 'styles.less' 'js' 'dist' 'build.sh' 'html_conv' 'README.md')
    items="${exclude[@]}"
    regex="${items//[[:space:]]/|}"
    find -maxdepth 1 -exec bash -c "if [[ {} =~ $regex ]]; then :; else cp -r {} dist/; fi" \;
}

title "Checking dependencies"
check_deps terser
check_deps lessc
check_deps cleancss
check_deps html-minifier
check_deps python3

mkdir dist/

title "Minifying JS"
js_minify

title "Converting LESS"
lessc "styles.less" "$mincss"

title "Minifying CSS"
cleancss -o "$mincss" "$mincss"

title "Minifying HTML"
cat index.html | python3 html_conv.py "$minjs_name" "$mincss_name" >"$minhtml"
html_minify "$minhtml"

title "Copying other files"
copy_files

success