init.sh

#!/usr/bin/env bash
set -e

# Init Project Helper
# Usage: ./init.sh new_project_name

if [ -z "$1" ]; then
    echo "❌ Error: Project name not provided."
    echo "Usage: ./init.sh <new_project_name>"
    exit 1
fi

INPUT_NAME="$1"

# 1. Setup Cross-Platform sed_inplace function
if [[ "$OSTYPE" == "darwin"* ]]; then
    sed_inplace() { sed -i "" "$@"; }
else
    sed_inplace() { sed -i "$@"; }
fi

# 2. Sanitise names
# Distribution name (dashes allowed, e.g. my-awesome-app)
NEW_NAME_DASH=$(echo "$INPUT_NAME" | tr '_' '-')
# Python package name (only underscores, e.g. my_awesome_app)
NEW_NAME_SNAKE=$(echo "$INPUT_NAME" | tr '-' '_')

# Validate Python package name
if [[ ! "$NEW_NAME_SNAKE" =~ ^[a-zA-Z_][a-zA-Z0-9_]*$ ]]; then
    echo "❌ Error: The project name '$INPUT_NAME' generates an invalid Python package name '$NEW_NAME_SNAKE'."
    echo "Python package names must start with a letter or underscore, and contain only alphanumeric characters and underscores."
    exit 1
fi

# 3. Dynamically detect old names
# Get the snake_case folder name inside src/
OLD_NAME_SNAKE=$(find src -mindepth 1 -maxdepth 1 -type d -not -name "__pycache__" -exec basename {} \; | head -n1)

if [ -z "$OLD_NAME_SNAKE" ]; then
    echo "❌ Error: Could not find current python package directory in src/"
    exit 1
fi

# Get old distribution name from pyproject.toml
OLD_NAME_DASH=$(grep 'name =' pyproject.toml | head -n1 | cut -d'"' -f2)

if [ -z "$OLD_NAME_DASH" ]; then
    OLD_NAME_DASH="my-backend-project"
fi

echo "🚀 Renaming project from: "
echo "   - Distribution name: $OLD_NAME_DASH -> $NEW_NAME_DASH"
echo "   - Python package:    $OLD_NAME_SNAKE -> $NEW_NAME_SNAKE"

# 4. Rename Source Directory
if [ -d "src/$OLD_NAME_SNAKE" ] && [ "$OLD_NAME_SNAKE" != "$NEW_NAME_SNAKE" ]; then
    mv "src/$OLD_NAME_SNAKE" "src/$NEW_NAME_SNAKE"
    echo "✅ Renamed src directory to src/$NEW_NAME_SNAKE"
fi

# 5. Update pyproject.toml
sed_inplace "s/name = \"$OLD_NAME_DASH\"/name = \"$NEW_NAME_DASH\"/" pyproject.toml
sed_inplace "s/packages = \[\"src\/$OLD_NAME_SNAKE\"\]/packages = \[\"src\/$NEW_NAME_SNAKE\"\]/" pyproject.toml
sed_inplace "s/\"$OLD_NAME_SNAKE.main:main\"/\"$NEW_NAME_SNAKE.main:main\"/" pyproject.toml
echo "✅ Updated pyproject.toml"

# 6. Update all python files (source, tests, and alembic configs) to use the new package name imports
if [[ "$OSTYPE" == "darwin"* ]]; then
    find "src/$NEW_NAME_SNAKE" -type f -name "*.py" -exec sed -i "" "s/$OLD_NAME_SNAKE/$NEW_NAME_SNAKE/g" {} +
    find "tests" -type f -name "*.py" -exec sed -i "" "s/$OLD_NAME_SNAKE/$NEW_NAME_SNAKE/g" {} +
    if [ -d "alembic" ]; then
        find "alembic" -type f -name "*.py" -exec sed -i "" "s/$OLD_NAME_SNAKE/$NEW_NAME_SNAKE/g" {} +
    fi
else
    find "src/$NEW_NAME_SNAKE" -type f -name "*.py" -exec sed -i "s/$OLD_NAME_SNAKE/$NEW_NAME_SNAKE/g" {} +
    find "tests" -type f -name "*.py" -exec sed -i "s/$OLD_NAME_SNAKE/$NEW_NAME_SNAKE/g" {} +
    if [ -d "alembic" ]; then
        find "alembic" -type f -name "*.py" -exec sed -i "s/$OLD_NAME_SNAKE/$NEW_NAME_SNAKE/g" {} +
    fi
fi
echo "✅ Updated Python source, test, and alembic files imports"

# 7. Update Docker Compose and environment config files
if [ -f "docker-compose.yml" ]; then
    sed_inplace "s/${OLD_NAME_SNAKE}_db/${NEW_NAME_SNAKE}_db/g" docker-compose.yml
    sed_inplace "s/${OLD_NAME_SNAKE}_web/${NEW_NAME_SNAKE}_web/g" docker-compose.yml
    echo "✅ Updated docker-compose.yml"
fi

if [ -f ".env.example" ]; then
    sed_inplace "s/$OLD_NAME_SNAKE/$NEW_NAME_SNAKE/g" .env.example
    echo "✅ Updated .env.example"
fi

if [ -f ".env" ]; then
    sed_inplace "s/$OLD_NAME_SNAKE/$NEW_NAME_SNAKE/g" .env
    echo "✅ Updated .env"
fi

# 8. Clean up old locks and venv to ensure fresh start
rm -rf .venv uv.lock
echo "🗑️  Cleaned up old environment"

# 9. Re-generate lock and install
echo "📦 Generating new uv.lock..."
nix develop --command uv lock
echo "📦 Installing dependencies..."
nix develop --command uv sync --all-extras

# 10. Reset Git (with Interactivity Check & Confirmation)
SHOULD_RESET_GIT=true
if [ -d ".git" ]; then
    if [ -t 0 ]; then
        echo "⚠️  Warning: A Git repository is already initialized."
        read -p "Do you want to reset Git history for this new project? (y/N): " confirm
        if [[ ! "$confirm" =~ ^[Yy]$ ]]; then
            SHOULD_RESET_GIT=false
        fi
    else
        # Non-interactive: keep git history to prevent hanging
        SHOULD_RESET_GIT=false
    fi
fi

if [ "$SHOULD_RESET_GIT" = true ]; then
    rm -rf .git
    git init
    git add .
    git commit -m "Initial commit for $NEW_NAME_DASH"
    echo "✅ Reset Git repository and created initial commit"
else
    echo "⏭️  Skipped Git reset. Keeping current history."
fi

echo "🎉 Project $NEW_NAME_DASH is ready!"
echo "👉 Run 'nix develop' or 'direnv allow' to enter."
echo "👉 Run 'just dev' to launch the app."
echo "👉 Run 'just --list' to see all available commands."