#!/bin/sh
# Install git hook and Claude Code hook for this repo.
# Run once after cloning: sh scripts/install-hooks.sh

set -e
REPO_ROOT=$(git rev-parse --show-toplevel)

# ── Git pre-commit hook ────────────────────────────────────────────────────
HOOK_DST="$REPO_ROOT/.git/hooks/pre-commit"
cp "$REPO_ROOT/scripts/hook-pre-commit-docs.sh" "$HOOK_DST"
chmod +x "$HOOK_DST"
echo "✓ git pre-commit hook installed → .git/hooks/pre-commit"

# ── Claude Code PreToolUse hook ────────────────────────────────────────────
CLAUDE_DIR="$REPO_ROOT/.claude"
CLAUDE_HOOKS="$CLAUDE_DIR/hooks"
CLAUDE_SETTINGS="$CLAUDE_DIR/settings.json"

mkdir -p "$CLAUDE_HOOKS"

# Copy the hook script into .claude/hooks/
cp "$REPO_ROOT/scripts/hook-pre-commit-docs.sh" "$CLAUDE_HOOKS/pre-commit-docs-check.sh"
chmod +x "$CLAUDE_HOOKS/pre-commit-docs-check.sh"

# Merge the hook entry into .claude/settings.json
if [ -f "$CLAUDE_SETTINGS" ]; then
  # Add hooks key if not already present using Python
  python3 - "$CLAUDE_SETTINGS" <<'PYEOF'
import sys, json

path = sys.argv[1]
with open(path) as f:
    cfg = json.load(f)

hook_entry = {
    "type": "command",
    "command": "bash .claude/hooks/pre-commit-docs-check.sh"
}
hooks = cfg.setdefault("hooks", {})
pre = hooks.setdefault("PreToolUse", [])

# Find or create Bash matcher
bash_matchers = [m for m in pre if m.get("matcher") == "Bash"]
if bash_matchers:
    existing = bash_matchers[0].setdefault("hooks", [])
    cmds = [h.get("command") for h in existing]
    if hook_entry["command"] not in cmds:
        existing.append(hook_entry)
else:
    pre.append({"matcher": "Bash", "hooks": [hook_entry]})

with open(path, "w") as f:
    json.dump(cfg, f, indent=2)
    f.write("\n")

print("✓ Claude Code PreToolUse hook registered → .claude/settings.json")
PYEOF
else
  cat > "$CLAUDE_SETTINGS" <<JSON
{
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "Bash",
        "hooks": [
          {
            "type": "command",
            "command": "bash .claude/hooks/pre-commit-docs-check.sh"
          }
        ]
      }
    ]
  }
}
JSON
  echo "✓ Claude Code PreToolUse hook registered → .claude/settings.json (created)"
fi