#!/usr/bin/env bash

# This script is designed to work on:
# - macOS
# - Linux
# - Windows when using Git Bash (recommended)
#
# On Windows, run it from Git Bash:
#   ./scripts/init_project.sh my-project-name

set -e

SCRIPT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)
REPO_ROOT=$(cd -- "$SCRIPT_DIR/.." && pwd)
cd "$REPO_ROOT"

if [ -d ".git" ]; then
  echo "Error: this repository still contains a .git directory."
  echo "Please remove .git first or run this script only on a fresh copy of the template."
  exit 1
fi

PROJECT_NAME=${1:-}

if [ -z "$PROJECT_NAME" ]; then
  echo "Usage: ./scripts/init_project.sh <project-name>"
  exit 1
fi

if ! printf '%s' "$PROJECT_NAME" | grep -Eq '^[a-zA-Z0-9._-]+$'; then
  echo "Error: project name contains unsupported characters."
  echo "Use only letters, numbers, dots, underscores, and hyphens."
  exit 1
fi

echo "Creating project: $PROJECT_NAME"
echo "Working directory: $REPO_ROOT"


# rename project metadata (portable sed usage for macOS, Linux, and Git Bash on Windows)
# create temporary backup files (.bak) and remove them after replacement
if [ ! -f "README.md" ] || [ ! -f "pyproject.toml" ]; then
  echo "Error: README.md or pyproject.toml not found in repository root."
  exit 1
fi
sed -i.bak "s/New Project/$PROJECT_NAME/g" README.md
sed -i.bak "s/python-ai-dev-template/$PROJECT_NAME/g" pyproject.toml

rm -f README.md.bak pyproject.toml.bak

# reset git history
rm -rf .git
git init
git branch -M main

echo ""
echo "Project initialized."
echo ""
echo "Next steps:"
echo ""
echo "git add ."
echo "git commit -m \"Initial $PROJECT_NAME\""
echo ""
echo "Create a remote repository and run:"
echo ""
echo "git remote add origin <repo-url>"
echo "git push -u origin main"