#!/bin/sh
# Yah Mesh desktop — one-command install for Linux, served by the relay:
#
#   curl -fsSL https://relay.yahai.app/desktop | sh
#
# Installs the Yah Code service (Bun) as a systemd user service and the
# Yah Mesh app (GTK4, Python). Everything prints — a silent installer once
# cost this project an afternoon, so nothing here hides behind /dev/null.
set -eu

RELAY="https://relay.yahai.app"
APP_DIR="${YAHCODE_APP_DIR:-$HOME/.yahcode/app}"

say() { printf '%s\n' "→ $*"; }

command -v curl >/dev/null 2>&1 || { echo "curl is required"; exit 1; }
command -v tar  >/dev/null 2>&1 || { echo "tar is required"; exit 1; }

# ── macOS: the Yah AI app IS the manager — install it plus the service, then
# hand off. Prebuilt and ad-hoc signed; the quarantine strip below is what
# lets a downloaded ad-hoc app open without the right-click dance.
if [ "$(uname)" = "Darwin" ]; then
  say "macOS detected — installing Yah AI.app + the Yah Code service"
  TMPD=$(mktemp -d)
  say "fetching the Mac app from ${RELAY}…"
  curl -fsSL "$RELAY/desktop-mac.zip" -o "$TMPD/yahai.zip"
  # ditto, NOT unzip — and for the same reason the deploy script uses ditto to
  # create it. unzip does not restore the bundle metadata ditto packs, so the
  # app arrived with a broken code-signature seal: `codesign --verify` on the
  # INSTALLED app reported "a sealed resource is missing or invalid" while the
  # downloaded archive verified perfectly. It still launched (ad-hoc, quarantine
  # stripped), which is exactly what makes it the kind of bug that ships.
  # ditto is part of the base system on every Mac — no new dependency.
  ditto -x -k "$TMPD/yahai.zip" "$TMPD"
  osascript -e 'quit app "Yah AI"' 2>/dev/null || true
  rm -rf "/Applications/Yah AI.app"
  mv "$TMPD/Yah AI.app" "/Applications/Yah AI.app"
  xattr -rd com.apple.quarantine "/Applications/Yah AI.app" 2>/dev/null || true
  say "app installed to /Applications"

  if command -v bun >/dev/null 2>&1; then
    say "bun $(bun --version) already installed"
  else
    say "installing bun (the service's runtime)…"
    curl -fsSL https://bun.sh/install | bash
    export PATH="$HOME/.bun/bin:$PATH"
  fi
  mkdir -p "$APP_DIR"
  curl -fsSL "$RELAY/desktop.tar.gz" | tar -xz -C "$APP_DIR"
  say "installing service dependencies (compiles llama.cpp once — minutes, not seconds)…"
  ( cd "$APP_DIR/yahcode" && "$(command -v bun)" install )
  rm -rf "$TMPD"

# ── the mesh machinery, in the same install ───────────────────────────────
# The Agents tab manages connectors through ~/.agentmesh/install-service.mjs
# and friends. These used to arrive only with a SEPARATE connector install,
# so a fresh desktop showed an Agents tab that could not act until a second
# curl command nobody remembered. Seed the shared helpers here — but never
# overwrite existing ones: a live connector's helpers belong to update.mjs.
MESH_DIR="$HOME/.agentmesh"
mkdir -p "$MESH_DIR"
for helper in install-service.mjs pair.mjs doctor.mjs update.mjs mesh-mcp.mjs; do
  if [ ! -f "$MESH_DIR/$helper" ]; then
    curl -fsSL "$RELAY/$helper" -o "$MESH_DIR/$helper"
    say "mesh helper installed: $helper"
  fi
done

  echo ""
  say "done. Open Yah AI (it starts and supervises the service itself)."
  say "Then pair from the phone: Yah AI → Settings → Yah Code → this Mac."
  open -a "Yah AI" 2>/dev/null || true
  exit 0
fi

# ── bun: the runtime the service runs on ──────────────────────────────────
if command -v bun >/dev/null 2>&1; then
  say "bun $(bun --version) already installed"
else
  say "installing bun (the service's runtime)…"
  curl -fsSL https://bun.sh/install | bash
  export PATH="$HOME/.bun/bin:$PATH"
  command -v bun >/dev/null 2>&1 || { echo "bun install failed — see output above"; exit 1; }
fi
BUN="$(command -v bun)"

# ── the payload: service source + the GTK app ─────────────────────────────
say "fetching the desktop payload from ${RELAY}…"
mkdir -p "$APP_DIR"
curl -fsSL "$RELAY/desktop.tar.gz" | tar -xz -C "$APP_DIR"
say "payload extracted to $APP_DIR"

say "installing service dependencies (this compiles llama.cpp once — minutes, not seconds)…"
( cd "$APP_DIR/yahcode" && "$BUN" install )

# ── the service: systemd user unit, adopt-friendly ────────────────────────
UNIT_DIR="$HOME/.config/systemd/user"
mkdir -p "$UNIT_DIR"
cat > "$UNIT_DIR/yahcode.service" << UNIT
[Unit]
Description=Yah Code service (the API the Yah Mesh app and your phone talk to)

[Service]
ExecStart=$BUN run $APP_DIR/yahcode/src/main.ts
WorkingDirectory=$APP_DIR/yahcode
Restart=on-failure
RestartSec=3

[Install]
WantedBy=default.target
UNIT

if command -v systemctl >/dev/null 2>&1; then
  systemctl --user daemon-reload
  systemctl --user enable --now yahcode.service
  say "service enabled (systemctl --user status yahcode.service)"
  say "NOTE: to keep it running while logged out: loginctl enable-linger $USER"
else
  say "no systemd — start manually with: $BUN run $APP_DIR/yahcode/src/main.ts"
fi


# ── the mesh machinery, in the same install ───────────────────────────────
# The Agents tab manages connectors through ~/.agentmesh/install-service.mjs
# and friends. These used to arrive only with a SEPARATE connector install,
# so a fresh desktop showed an Agents tab that could not act until a second
# curl command nobody remembered. Seed the shared helpers here — but never
# overwrite existing ones: a live connector's helpers belong to update.mjs.
MESH_DIR="$HOME/.agentmesh"
mkdir -p "$MESH_DIR"
for helper in install-service.mjs pair.mjs doctor.mjs update.mjs mesh-mcp.mjs; do
  if [ ! -f "$MESH_DIR/$helper" ]; then
    curl -fsSL "$RELAY/$helper" -o "$MESH_DIR/$helper"
    say "mesh helper installed: $helper"
  fi
done

# ── the app: GTK4/libadwaita, launched as a module ────────────────────────
if python3 -c "import gi" >/dev/null 2>&1; then
  say "installing the Yah Mesh app launcher…"
  BIN_DIR="$HOME/.local/bin"; mkdir -p "$BIN_DIR"
  cat > "$BIN_DIR/yahmesh" << LAUNCH
#!/bin/sh
export PYTHONPATH="$APP_DIR/yahmesh:\${PYTHONPATH:-}"
exec python3 -m yahmesh "\$@"
LAUNCH
  chmod +x "$BIN_DIR/yahmesh"
  DESK_DIR="$HOME/.local/share/applications"; mkdir -p "$DESK_DIR"
  cat > "$DESK_DIR/yahmesh.desktop" << DESK
[Desktop Entry]
Type=Application
Name=Yah Mesh
Comment=Sessions, files, rooms and agents on this machine
Exec=$BIN_DIR/yahmesh
Terminal=false
Categories=Development;
DESK
  say "app installed — launch with: yahmesh (or from your app grid)"
else
  say "PyGObject/GTK4 not found — the app needs it (Debian/Ubuntu: sudo apt install python3-gi gir1.2-adw-1; Fedora: sudo dnf install python3-gobject libadwaita)."
  say "The SERVICE is running regardless — your phone can pair and drive it now."
fi

echo ""
say "done. Next: open Yah AI on your phone → Settings → Yah Code → pair this machine."
say "In the app (or via curl http://127.0.0.1:8765/api/pair -X POST -d '{}'), mint the 6-digit code."