#!/bin/bash
# SAUCE: https://github.com/Raymonf/whack/blob/master/MercuryPatcher/index.html
set -e

disable_lockout=${BINPATCH_DISABLE_LOCKOUT:-false}
force_engine_locale=${BINPATCH_FORCE_ENGINE_LOCALE:-false}
allow_chn_region=${BINPATCH_ALLOW_CHN_REGION:-false}
force_hidden_luin_title=${BINPATCH_FORCE_HIDDEN_LUIN_TITLE:-false}

dir=/tmp/wacca/3.07.01
file=$dir/game/WindowsNoEditor/Mercury/Binaries/Win64/Mercury-Win64-Shipping.exe

patch () {
    local offbytes=$1
    local onbytes=$2
    local len=${#offbytes}
    local result=$(((len / 2)))
    local offset=$3
    local enable=$4
    local description=$5

    local byte_value=$(dd if="$file" bs=1 count=$result skip=$offset 2>/dev/null | hexdump -v -e '/1 "%02X"')
    if [ "$byte_value" = "$offbytes" ]; then
        echo -n "[$description] Patch disabled"
        if [ "$enable" = true ]; then
            echo "$onbytes" | sed 's/\([0-9A-F]\{2\}\)/\\x\1/g' | xargs -0 printf | dd of="$file" bs=1 count=$result seek=$offset conv=notrunc 2>/dev/null
            echo -e " -> \u001b[1menabled\u001b[22m"
        else
            echo ""
        fi
    elif [ "$byte_value" = "$onbytes" ]; then
        echo -n "[$description] Patch enabled"
        if [ "$enable" = false ]; then
            echo "$offbytes" | sed 's/\([0-9A-F]\{2\}\)/\\x\1/g' | xargs -0 printf | dd of="$file" bs=1 count=$result seek=$offset conv=notrunc 2>/dev/null
            echo -e " -> \u001b[1mdisabled\u001b[22m"
        else
            echo ""
        fi
    else
        echo "Patch not applicable - byte is 0x$byte_value (expected 0x$offbytes or 0x$onbytes)"
    fi
}

if [ "$VERSION" = "3.07.01" ]; then
    patch E82B5AE4FF4533C0418D5004488BCBE80CACEDFF84C07512BA06 909090909090909090909090909090909090909090909090BA00 5175664 $disable_lockout "Fully disable lockout 0"
    patch BA02 BA00 5175718 $disable_lockout "Fully disable lockout 1"
    patch 488D552048 E979FFFFFF 5175794 $disable_lockout "Fully disable lockout 2"

    patch 7407 9090 5603668 $force_engine_locale "Force Engine locale (ignore router country language)"

    patch 75 EB 32682167 $allow_chn_region "Allow using CHN region (don't change to HKG)"

    patch 74 EB 5181434 $force_hidden_luin_title "Force enable Hidden Luin title screen"
else
    echo "Binary patches not applicable to $VERSION, skipping..."
fi