#!/usr/bin/env bash
# Set up a Wine prefix for running the Metin2 client on Linux.
# Idempotent: re-running on an existing prefix skips steps that are already done.
#
# Usage:
#   ./scripts/setup-wine-prefix.sh <source-client-dir> <target-dir>
#
# Example:
#   ./scripts/setup-wine-prefix.sh /mnt/windows_c/Users/me/metin/client ~/metin-wine
#
# Result layout:
#   <target-dir>/client/   — writable copy of the client deploy folder
#   <target-dir>/prefix/   — Wine prefix with required runtime deps installed

set -euo pipefail

if [[ $# -lt 2 ]]; then
	echo "usage: $0 <source-client-dir> <target-dir>" >&2
	echo "  source-client-dir: path containing Metin2.exe, assets/, pack/, etc." >&2
	echo "  target-dir:        directory to create (holds client/ and prefix/)" >&2
	exit 2
fi

SRC=$1
DEST=$2

if [[ ! -f "$SRC/Metin2.exe" && ! -f "$SRC/Metin2_Debug.exe" ]]; then
	echo "error: $SRC does not look like a client folder (no Metin2.exe or Metin2_Debug.exe)" >&2
	exit 1
fi

for tool in wine winetricks; do
	if ! command -v "$tool" >/dev/null 2>&1; then
		echo "error: $tool not found in PATH. Install it via your package manager." >&2
		exit 1
	fi
done

CLIENT_DIR=$DEST/client
PREFIX_DIR=$DEST/prefix

mkdir -p "$DEST"

if [[ -d "$CLIENT_DIR" && -f "$CLIENT_DIR/Metin2.exe" ]] || [[ -d "$CLIENT_DIR" && -f "$CLIENT_DIR/Metin2_Debug.exe" ]]; then
	echo "[1/3] client already present at $CLIENT_DIR, skipping copy"
else
	echo "[1/3] copying client from $SRC to $CLIENT_DIR (this can take a minute)"
	cp -a "$SRC" "$CLIENT_DIR"
fi

export WINEPREFIX=$PREFIX_DIR
export WINEARCH=win64

if [[ -f "$PREFIX_DIR/system.reg" ]]; then
	echo "[2/3] wine prefix already exists at $PREFIX_DIR, skipping wineboot"
else
	echo "[2/3] creating wine prefix at $PREFIX_DIR"
	mkdir -p "$PREFIX_DIR"
	wineboot --init >/dev/null 2>&1 || true
fi

# vcrun2022   — MSVC 2015-2022 runtime, required because the client is an MSVC build
# d3dx9       — D3DX9 helper DLLs (Wine implements d3d9 but not the d3dx9 helpers)
# corefonts   — Arial/Courier/Times/etc., needed by some UI elements
# tahoma      — the client hard-codes Tahoma as the UI font; without it, all text renders invisibly
VERBS=(vcrun2022 d3dx9 corefonts tahoma)
TO_INSTALL=()
for v in "${VERBS[@]}"; do
	case $v in
		vcrun2022)
			if [[ -f "$PREFIX_DIR/drive_c/windows/system32/msvcp140.dll" ]]; then continue; fi ;;
		d3dx9)
			if [[ -f "$PREFIX_DIR/drive_c/windows/system32/d3dx9_43.dll" ]]; then continue; fi ;;
		corefonts)
			if [[ -f "$PREFIX_DIR/drive_c/windows/Fonts/arial.ttf" ]]; then continue; fi ;;
		tahoma)
			if [[ -f "$PREFIX_DIR/drive_c/windows/Fonts/tahoma.ttf" ]]; then continue; fi ;;
	esac
	TO_INSTALL+=("$v")
done

if [[ ${#TO_INSTALL[@]} -eq 0 ]]; then
	echo "[3/3] all winetricks verbs already installed"
else
	echo "[3/3] installing winetricks verbs: ${TO_INSTALL[*]}"
	winetricks -q "${TO_INSTALL[@]}"
fi

echo
echo "done. to launch:"
echo
echo "  cd $CLIENT_DIR"
echo "  WINEPREFIX=$PREFIX_DIR wine Metin2.exe"
echo
echo "or with verbose client logging:"
echo
echo "  WINEPREFIX=$PREFIX_DIR WINEDEBUG=-all,+err,+seh wine Metin2_Debug.exe"