#!/bin/bash
#
# Git Hooks Installation Script for RSpade Framework
# This script installs version-controlled git hooks into the local repository
#

# Color codes for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
CYAN='\033[0;36m'
NC='\033[0m' # No Color

# Get the repository root (where .git directory is)
REPO_ROOT=$(git rev-parse --show-toplevel 2>/dev/null)

if [ -z "$REPO_ROOT" ]; then
    echo -e "${RED}Error: Not in a git repository${NC}"
    exit 1
fi

HOOKS_SOURCE_DIR="$REPO_ROOT/bin/git-hooks"
GIT_HOOKS_DIR="$REPO_ROOT/.git/hooks"

echo -e "${CYAN}RSpade Git Hooks Installer${NC}"
echo "============================"
echo ""

# Check if source hooks directory exists
if [ ! -d "$HOOKS_SOURCE_DIR" ]; then
    echo -e "${RED}Error: Git hooks source directory not found at $HOOKS_SOURCE_DIR${NC}"
    exit 1
fi

# Create .git/hooks directory if it doesn't exist
if [ ! -d "$GIT_HOOKS_DIR" ]; then
    mkdir -p "$GIT_HOOKS_DIR"
    echo -e "${GREEN}Created .git/hooks directory${NC}"
fi

# Function to install a hook
install_hook() {
    local hook_name=$1
    local source_file="$HOOKS_SOURCE_DIR/$hook_name"
    local target_file="$GIT_HOOKS_DIR/$hook_name"
    
    if [ ! -f "$source_file" ]; then
        echo -e "${YELLOW}Skipping $hook_name (not found in source)${NC}"
        return
    fi
    
    # Check if hook already exists
    if [ -e "$target_file" ]; then
        if [ -L "$target_file" ]; then
            # It's a symlink, check if it points to our hook
            current_target=$(readlink "$target_file")
            if [ "$current_target" = "$source_file" ]; then
                echo -e "${GREEN}✓${NC} $hook_name already installed"
                return
            else
                echo -e "${YELLOW}Updating $hook_name symlink${NC}"
                rm "$target_file"
            fi
        else
            # It's a regular file, back it up
            backup_file="${target_file}.backup.$(date +%Y%m%d_%H%M%S)"
            echo -e "${YELLOW}Backing up existing $hook_name to $(basename $backup_file)${NC}"
            mv "$target_file" "$backup_file"
        fi
    fi
    
    # Create symlink
    ln -s "$source_file" "$target_file"
    echo -e "${GREEN}✓ Installed $hook_name${NC}"
}

# Install available hooks
echo "Installing git hooks..."
echo ""

install_hook "pre-commit"

# Future hooks can be added here:
# install_hook "pre-push"
# install_hook "commit-msg"
# install_hook "prepare-commit-msg"

echo ""
echo -e "${GREEN}Git hooks installation complete!${NC}"
echo ""
echo "Installed hooks will:"
echo "  • Run code quality checks before commits"
echo "  • Prevent commits with code standard violations"
echo ""
echo "To bypass hooks temporarily (not recommended):"
echo "  git commit --no-verify"
echo ""
echo "To uninstall hooks:"
echo "  rm .git/hooks/pre-commit"