#!/bin/bash
# Git OpenTimestamp Hooks Installer
# Copies self-contained hooks to git repository

set -e

REPO_PATH="${1:-.}"
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

cd "$REPO_PATH"

# Verify we're in a git repository
if ! git rev-parse --git-dir > /dev/null 2>&1; then
    echo "Error: not a git repository" >&2
    exit 1
fi

HOOKS_DIR="$(git rev-parse --git-dir)/hooks"

echo "Installing OpenTimestamp hooks to: $HOOKS_DIR"

# Copy hooks
cp "$SCRIPT_DIR/post-commit" "$HOOKS_DIR/post-commit"
cp "$SCRIPT_DIR/pre-commit" "$HOOKS_DIR/pre-commit"

# Make executable
chmod +x "$HOOKS_DIR/post-commit" "$HOOKS_DIR/pre-commit"

echo "✓ Post-commit hook installed"
echo "✓ Pre-commit backfill hook installed"

# Setup .gitignore
GITIGNORE=".gitignore"
if [ ! -f "$GITIGNORE" ]; then
    echo ".ots/.attestation-cache" > "$GITIGNORE"
    echo "✓ Created .gitignore"
elif ! grep -q ".ots/.attestation-cache" "$GITIGNORE"; then
    echo "" >> "$GITIGNORE"
    echo ".ots/.attestation-cache" >> "$GITIGNORE"
    echo "✓ Updated .gitignore"
fi

echo ""
echo "Next steps:"
echo "1. Make a test commit to verify hooks work"
echo "2. Commit the .ots/ directory: git add .ots/"
echo "3. Commit with message: git commit -m 'Add OpenTimestamp proofs'"
echo ""
echo "To uninstall:"
echo "  rm $HOOKS_DIR/post-commit $HOOKS_DIR/pre-commit"