#!/usr/bin/env bash
# Set up gstack for local development — test skills from within this repo.
#
# Creates .claude/skills/gstack → (symlink to repo root) so Claude Code
# discovers skills from your working tree. Changes take effect immediately.
#
# Also copies .env from the main worktree if this is a Conductor workspace
# or git worktree (so API keys carry over automatically).
#
# Usage: bin/dev-setup       # set up
#        bin/dev-teardown    # clean up
set -e

REPO_ROOT="$(cd "$(dirname "$0")/.." && pwd)"

# 1. Copy .env from main worktree (if we're a worktree and don't have one)
if [ ! -f "$REPO_ROOT/.env" ]; then
  MAIN_WORKTREE="$(git -C "$REPO_ROOT" worktree list --porcelain 2>/dev/null | head -1 | sed 's/^worktree //')"
  if [ -n "$MAIN_WORKTREE" ] && [ "$MAIN_WORKTREE" != "$REPO_ROOT" ] && [ -f "$MAIN_WORKTREE/.env" ]; then
    cp "$MAIN_WORKTREE/.env" "$REPO_ROOT/.env"
    echo "Copied .env from main worktree ($MAIN_WORKTREE)"
  fi
fi

# 2. Install dependencies
if [ ! -d "$REPO_ROOT/node_modules" ]; then
  echo "Installing dependencies..."
  (cd "$REPO_ROOT" && bun install)
fi

# 3. Create .claude/skills/ inside the repo
mkdir -p "$REPO_ROOT/.claude/skills"

# 4. Symlink .claude/skills/gstack → repo root
# This makes setup think it's inside a real .claude/skills/ directory
GSTACK_LINK="$REPO_ROOT/.claude/skills/gstack"
if [ -L "$GSTACK_LINK" ]; then
  echo "Updating existing symlink..."
  rm "$GSTACK_LINK"
elif [ -d "$GSTACK_LINK" ]; then
  echo "Error: .claude/skills/gstack is a real directory, not a symlink." >&2
  echo "Remove it manually if you want to use dev mode." >&2
  exit 1
fi
ln -s "$REPO_ROOT" "$GSTACK_LINK"

# 5. Create .agents/skills/gstack → repo root (for Codex/Gemini/Cursor)
mkdir -p "$REPO_ROOT/.agents/skills"
AGENTS_LINK="$REPO_ROOT/.agents/skills/gstack"
if [ -L "$AGENTS_LINK" ]; then
  rm "$AGENTS_LINK"
elif [ -d "$AGENTS_LINK" ]; then
  echo "Warning: .agents/skills/gstack is a real directory, skipping." >&2
fi
if [ ! -e "$AGENTS_LINK" ]; then
  ln -s "$REPO_ROOT" "$AGENTS_LINK"
fi

# 6. Do not call the user runtime installer from a development worktree.
#
# GStack 2 delegates skill placement to the standard Agent Skills installer,
# and root ./setup installs only the optional per-user runtime. Development can
# execute the checked-out binaries directly, so invoking ./setup here would
# mutate user state without adding any workspace capability.
#
# Brain-aware (gbrain) blocks render into an untracked workspace dir.
#
# The worktree's SKILL.md files stay canonical (the guard above). If gbrain is
# installed, render the :user variant (with GBRAIN_CONTEXT_LOAD +
# GBRAIN_SAVE_RESULTS) into .claude/gstack-rendered (gitignored, per-workspace)
# and repoint the workspace's SKILL.md symlinks at it. gen-skill-docs --out-dir
# also rewrites the section-base path so section reads resolve to the render, not
# the global install. Result: this workspace gets the full gbrain experience
# while git stays clean. Production skill placement and updates remain owned by
# the standard Agent Skills installer.
GBRAIN_DETECT="$REPO_ROOT/bin/gstack-gbrain-detect"
RENDER_DIR="$REPO_ROOT/.claude/gstack-rendered"
if [ -x "$GBRAIN_DETECT" ] && "$GBRAIN_DETECT" --is-ok 2>/dev/null; then
  echo ""
  echo "gbrain detected — rendering brain-aware skills into .claude/gstack-rendered (workspace-only, untracked)..."
  rm -rf "$RENDER_DIR"
  if ( cd "$REPO_ROOT" && bun run gen:skill-docs:user --host claude --out-dir "$RENDER_DIR" >/dev/null 2>&1 ); then
    # Repoint each project-local SKILL.md symlink whose worktree target has a
    # rendered counterpart. The skill DIRECTORY name (basename of the symlink
    # target's dir) maps to RENDER_DIR/<dir>/SKILL.md, which is robust to
    # frontmatter renames and the gstack- prefix on the link name.
    repointed=0
    for skill_link in "$REPO_ROOT"/.claude/skills/*/SKILL.md; do
      [ -L "$skill_link" ] || continue
      target="$(readlink "$skill_link")"
      skilldir="$(basename "$(dirname "$target")")"
      rendered="$RENDER_DIR/$skilldir/SKILL.md"
      if [ -f "$rendered" ]; then ln -snf "$rendered" "$skill_link"; repointed=$((repointed + 1)); fi
    done
    echo "  $repointed workspace skills now serve brain-aware blocks (worktree stays canonical)."
  else
    echo "  warning: brain-aware render failed — workspace uses canonical skills."
  fi
fi

echo ""
echo "Dev mode active. Skills resolve from this working tree."
echo "  .claude/skills/gstack → $REPO_ROOT"
echo "  .agents/skills/gstack → $REPO_ROOT"
echo "Edit any SKILL.md and test immediately — no copy/deploy needed."
echo ""
echo "To refresh managed gbrain detection state, run:"
echo "  gstack-config gbrain-refresh"
echo "Then use the standard Agent Skills installer for production skill updates."
echo ""
echo "To tear down: bin/dev-teardown"