#!/usr/bin/env bash
# Metro Warden — dev environment launcher
# Opens a tmux session with 3 panes inside Ghostty:
#
#  ┌─────────────────────┬───────────────────────┐
#  │                     │                       │
#  │   textual console   │   metro warden (app)  │
#  │   (DevTools)        │   textual run --dev   │
#  │                     │                       │
#  │                     ├───────────────────────┤
#  │                     │                       │
#  │                     │   watchexec           │
#  │                     │   (auto-restart .py)  │
#  │                     │                       │
#  └─────────────────────┴───────────────────────┘
#
# Usage: ./dev.sh

set -e

PROJECT="$(cd "$(dirname "$0")" && pwd)"
VENV="$PROJECT/.venv/bin/activate"
SESSION="metro-warden"

if [ ! -f "$VENV" ]; then
  echo "ERROR: .venv not found. Run:"
  echo "  python3 -m venv .venv && source .venv/bin/activate && pip install -e '.[dev]'"
  exit 1
fi

# Kill existing session if it exists
tmux kill-session -t "$SESSION" 2>/dev/null || true

# Create session with DevTools pane (left, full height)
tmux new-session -d -s "$SESSION" -x 220 -y 50 \
  -n "metro" \
  "bash -c 'source $VENV && textual console'"

# Split right — App pane (top right)
tmux split-window -t "$SESSION:0" -h \
  "bash -c 'source $VENV && textual run --dev $PROJECT/main.py'"

# Split the right pane vertically — Watchexec pane (bottom right)
tmux split-window -t "$SESSION:0.1" -v \
  "bash -c 'source $VENV && watchexec --exts py --ignore assets/ --ignore .venv/ -r -- textual run --dev $PROJECT/main.py'"

# Give the left pane 38% width
tmux resize-pane -t "$SESSION:0.0" -x "38%"

# Focus the app pane
tmux select-pane -t "$SESSION:0.1"

# Open in Ghostty (or attach in current terminal if already inside tmux)
if [ -n "$TMUX" ]; then
  tmux switch-client -t "$SESSION"
elif command -v ghostty &>/dev/null; then
  ghostty -e tmux attach-session -t "$SESSION" &
  # Open VS Code after a beat
  sleep 0.5
  code "$PROJECT" 2>/dev/null || true
else
  tmux attach-session -t "$SESSION"
fi

echo "Metro Warden dev environment started. Session: $SESSION"