#!/usr/bin/env bash
set -euo pipefail
# DevourUnlocker installer — pulls winhttp.dll from GitHub Releases and drops beside DEVOUR.exe
# Works for CachyOS/Proton and native Linux; Windows users should use install.ps1
# Usage: REPO=mithral/DevourUnlocker bash install.sh [--uninstall] [--tag v2.0.0] [--game-dir /path]

REPO="${REPO:-mithral/DevourUnlocker}"
TAG="${TAG:-latest}"
GAME_DIR=""
UNINSTALL=0

while [[ $# -gt 0 ]]; do
  case "$1" in
    --uninstall) UNINSTALL=1; shift;;
    --tag) TAG="$2"; shift 2;;
    --game-dir) GAME_DIR="$2"; shift 2;;
    --repo) REPO="$2"; shift 2;;
    *) echo "Unknown arg $1"; exit 1;;
  esac
done

detect_game_dir() {
  local cands=(
    "$HOME/.local/share/Steam/steamapps/common/Devour"
    "$HOME/.steam/steam/steamapps/common/Devour"
    "/mnt/*/SteamLibrary/steamapps/common/Devour"
  )
  for c in "${cands[@]}"; do
    for e in $c; do [[ -f "$e/DEVOUR.exe" ]] && { echo "$e"; return 0; }; done
  done
  # parse libraryfolders.vdf
  local vdf="$HOME/.local/share/Steam/steamapps/libraryfolders.vdf"
  if [[ -f "$vdf" ]]; then
    grep -o '"path"[[:space:]]*"[^"]*"' "$vdf" | cut -d'"' -f4 | while read -r p; do
      if [[ -f "$p/steamapps/common/Devour/DEVOUR.exe" ]]; then echo "$p/steamapps/common/Devour"; return 0; fi
    done
  fi
  return 1
}

if [[ -z "$GAME_DIR" ]]; then
  GAME_DIR="$(detect_game_dir || true)"
fi
if [[ -z "$GAME_DIR" || ! -f "$GAME_DIR/DEVOUR.exe" ]]; then
  echo "[!] Could not find Devour install. Use --game-dir /path/to/Devour"
  exit 1
fi
echo "[*] Game dir: $GAME_DIR"

if [[ $UNINSTALL -eq 1 ]]; then
  echo "[*] Uninstalling..."
  rm -f "$GAME_DIR/winhttp.dll" "$GAME_DIR/DevourUnlocker.dll" "$GAME_DIR/DevourUnlocker.json"
  if [[ -f "$GAME_DIR/winhttp.dll.bak" ]]; then mv "$GAME_DIR/winhttp.dll.bak" "$GAME_DIR/winhttp.dll"; echo "[*] Restored original winhttp.dll"; fi
  echo "[*] Clearing Proton launch override hint:"
  echo "    Remove from Steam -> Devour -> Properties -> Launch Options: WINEDLLOVERRIDES=\"winhttp=n,b %command%\""
  exit 0
fi

# Resolve tag -> download URL
if [[ "$TAG" == "latest" ]]; then
  API="https://api.github.com/repos/$REPO/releases/latest"
  TAG=$(curl -s "$API" | grep -o '"tag_name"[[:space:]]*:[[:space:]]*"[^"]*"' | cut -d'"' -f4)
  [[ -z "$TAG" ]] && { echo "[!] Could not resolve latest tag"; exit 1; }
fi
echo "[*] Installing $REPO $TAG"

ZIP_URL="https://github.com/$REPO/releases/download/$TAG/DevourUnlocker_winhttp_$TAG.zip"
TMP="$(mktemp -d)"
echo "[*] Downloading $ZIP_URL"
if ! curl -L -o "$TMP/pkg.zip" "$ZIP_URL"; then
  echo "[!] Download failed — check REPO/TAG or build a release with that name"
  echo "    Fallback: build locally with cmake --build build"
  exit 1
fi
unzip -o "$TMP/pkg.zip" -d "$TMP" >/dev/null

# Backup existing winhttp if not ours
if [[ -f "$GAME_DIR/winhttp.dll" ]]; then
  if ! grep -q "DevourUnlocker" "$GAME_DIR/winhttp.dll" 2>/dev/null; then
    cp "$GAME_DIR/winhttp.dll" "$GAME_DIR/winhttp.dll.bak" && echo "[*] Backed up existing winhttp.dll -> winhttp.dll.bak"
  fi
fi

cp -v "$TMP/winhttp.dll" "$GAME_DIR/winhttp.dll"
cp -v "$TMP/DevourUnlocker.dll" "$GAME_DIR/DevourUnlocker.dll" 2>/dev/null || true
# Keep user's json if exists
[[ -f "$GAME_DIR/DevourUnlocker.json" ]] || cp -v "$TMP/DevourUnlocker.json" "$GAME_DIR/DevourUnlocker.json" 2>/dev/null || echo '{"unlockRobes":true,"unlockCharacters":true}' > "$GAME_DIR/DevourUnlocker.json"

echo "[*] Installed to $GAME_DIR"
echo "[*] For Proton (CachyOS): set Steam -> Devour -> Properties -> Launch Options to:"
echo "    WINEDLLOVERRIDES=\"winhttp=n,b\" %command%"
echo "[*] Then launch Devour, press F6 for GUI (selective unlock), F5 to unload."
echo "[*] Multiplayer: safe for friend lobbies (client visual, no VAC/EAC)."
rm -rf "$TMP"