#!/bin/bash
# =============================================================================
#  Popcorn's Pantheon - Season I: Odin's Trial
#  One-click Valheim modpack installer for macOS.
#
#  Double-click me (right-click -> Open the first time to get past
#  Gatekeeper). Installs BepInEx + the pinned client mods into the Steam
#  Valheim install, then drops a "Popcorn's Pantheon" launcher on the
#  Desktop that starts Valheim modded (BepInEx via Rosetta/x86_64).
#  Re-running is safe (repair/update).
# =============================================================================

CONNECT_ADDR="100.99.102.101:2456"
PASSWORD="ravenrock"
UA="PopcornsPantheon-Installer/1.0"

say_step() { printf '\n==> %s\n' "$1"; }
say_ok()   { printf '    %s\n' "$1"; }
finish()   {
  printf '\n'
  if [ -t 0 ]; then read -r -p "Press Return to close this window... " _ ; fi
  exit "$1"
}
fail() { printf '\nERROR: %s\n' "$1"; finish 1; }

printf '\n'
printf "  Popcorn's Pantheon - Season I: Odin's Trial\n"
printf '  Valheim modpack installer for macOS\n'

# ---- 1. Find the Valheim install --------------------------------------------
say_step 'Looking for your Valheim install...'
STEAM_DIR="$HOME/Library/Application Support/Steam"
CANDIDATES=("$STEAM_DIR/steamapps/common/Valheim")
VDF="$STEAM_DIR/steamapps/libraryfolders.vdf"
if [ -f "$VDF" ]; then
  while IFS= read -r lib; do
    CANDIDATES+=("$lib/steamapps/common/Valheim")
  done < <(sed -n 's/.*"path"[[:space:]]*"\([^"]*\)".*/\1/p' "$VDF")
fi

VALHEIM=""
for c in "${CANDIDATES[@]}"; do
  if [ -d "$c/Valheim.app" ]; then VALHEIM="$c"; break; fi
done
if [ -z "$VALHEIM" ]; then
  printf '\nCould not find Valheim.\n'
  printf 'Install Valheim from Steam first, then run this installer again.\n'
  printf 'Places checked:\n'
  for c in "${CANDIDATES[@]}"; do printf '  - %s\n' "$c"; done
  finish 1
fi
say_ok "Found Valheim at: $VALHEIM"

TMP=$(mktemp -d "${TMPDIR:-/tmp}/pantheon.XXXXXX") || fail 'Could not create a temp folder.'
trap 'rm -rf "$TMP"' EXIT

# Downloads a pinned Thunderstore package zip; echoes the zip path.
fetch() {
  local ns="$1" name="$2" ver="$3" zip="$TMP/$1-$2.zip"
  curl -fsSL --retry 3 -A "$UA" -o "$zip" \
    "https://thunderstore.io/package/download/$ns/$name/$ver/" || return 1
  printf '%s' "$zip"
}

FAILED=""
TOTAL=9

# ---- 2. BepInEx (the framework) -> the Valheim game ROOT --------------------
say_step "[1/$TOTAL] denikson-BepInExPack_Valheim v5.4.2333 (mod framework)"
ZIP=$(fetch denikson BepInExPack_Valheim 5.4.2333) \
  || fail 'Could not download BepInEx. Check your internet connection and try again.'
EX="$TMP/bepinex"
mkdir -p "$EX"
unzip -qo "$ZIP" -d "$EX" || fail 'Could not unpack BepInEx.'
[ -d "$EX/BepInExPack_Valheim" ] || fail 'Unexpected BepInEx package layout.'
# Inner folder contents -> game root: BepInEx/, doorstop bits, winhttp.dll,
# and the macOS start_game_bepinex.sh launcher script.
cp -Rf "$EX/BepInExPack_Valheim/." "$VALHEIM/" || fail 'Could not copy BepInEx into the game folder.'
chmod +x "$VALHEIM/start_game_bepinex.sh" 2>/dev/null
say_ok 'BepInEx installed into the game folder'

# ---- 3. The pinned mods -> BepInEx/plugins/<Author-Mod>/ --------------------
MODS="
ValheimModding|JsonDotNET|13.0.4
ValheimModding|YamlDotNet|16.3.1
ValheimModding|Jotunn|2.29.0
shudnal|ConditionalConfigSync|1.0.0
Smoothbrain|CreatureLevelAndLootControl|4.6.4
shudnal|TradersExtended|2.0.0
RandyKnapp|EpicLoot|0.12.15
VentureValheim|World_Advancement_Progression|0.3.14
"

i=1
for spec in $MODS; do
  i=$((i + 1))
  ns="${spec%%|*}"; rest="${spec#*|}"; name="${rest%%|*}"; ver="${rest#*|}"
  label="$ns-$name v$ver"
  say_step "[$i/$TOTAL] $label"

  if ! zip=$(fetch "$ns" "$name" "$ver"); then
    printf '    Download failed.\n'
    FAILED="$FAILED $label"
    continue
  fi
  ex="$TMP/$ns-$name"
  mkdir -p "$ex"
  if ! unzip -qo "$zip" -d "$ex"; then
    printf '    Unpack failed.\n'
    FAILED="$FAILED $label"
    continue
  fi
  # Everything except manifest.json / icon.png / *.md goes into the plugin
  # folder (delete-then-copy so re-runs repair/update).
  rm -f "$ex/manifest.json" "$ex/icon.png"
  find "$ex" -maxdepth 1 -iname '*.md' -exec rm -f {} +
  dest="$VALHEIM/BepInEx/plugins/$ns-$name"
  rm -rf "$dest"
  mkdir -p "$dest"
  if ! cp -Rf "$ex/." "$dest/"; then
    printf '    Copy failed.\n'
    FAILED="$FAILED $label"
    continue
  fi
  say_ok "Installed to BepInEx/plugins/$ns-$name"
done

# ---- 4. The Desktop launcher ------------------------------------------------
# Mac must launch through start_game_bepinex.sh (NOT plain Steam Play) and
# under x86_64/Rosetta so the x64 doorstop injects into Unity.
say_step "Creating the 'Popcorn's Pantheon' launcher on your Desktop..."
LAUNCHER="$HOME/Desktop/Popcorn's Pantheon.command"
cat > "$LAUNCHER" <<LAUNCH
#!/bin/bash
# Popcorn's Pantheon - modded Valheim launcher (BepInEx, forced x86_64 so the
# doorstop injects under Rosetta). Keep Steam open + logged in first.
exec arch -x86_64 /bin/bash "$VALHEIM/start_game_bepinex.sh" "$VALHEIM/Valheim.app"
LAUNCH
chmod +x "$LAUNCHER" || fail 'Could not make the Desktop launcher executable.'
xattr -d com.apple.quarantine "$LAUNCHER" 2>/dev/null
say_ok "Launcher created: ~/Desktop/Popcorn's Pantheon.command"

if [ -n "$FAILED" ]; then
  printf '\nSome packages failed:%s\n' "$FAILED"
  printf 'Check your internet connection and run this installer again - re-running is safe.\n'
  finish 1
fi

printf '\n=================================================================\n'
printf '  Done! The realm awaits.\n'
printf '=================================================================\n\n'
printf '  1. Open Steam and make sure you are logged in.\n'
printf "  2. Double-click 'Popcorn's Pantheon' on your Desktop to launch\n"
printf '     Valheim modded. (On Mac you MUST launch via that icon - not\n'
printf '     the plain Steam Play button.)\n'
printf '  3. Select your character, then: Join Game -> Join by IP\n'
printf '       Address:  %s\n' "$CONNECT_ADDR"
printf '       Password: %s\n' "$PASSWORD"
printf '\n  (Early access: you must be joined to the Tailscale network first.)\n'
finish 0