#!/bin/bash

set -u

SCRIPT_DIR="$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)"

pause_on_exit() {
    printf '\nPress Return to close this window...'
    read -r _
}
trap pause_on_exit EXIT

fail() {
    printf '\nError: %s\n' "$1" >&2
    exit 1
}

cd "$SCRIPT_DIR" || fail "Could not open the project directory."

command -v python3 >/dev/null 2>&1 || fail \
    "python3 was not found. Install Python 3, then run this installer again."

if [ ! -x ".venv/bin/python" ] || ! ".venv/bin/python" -m pip --version >/dev/null 2>&1; then
    printf 'Creating virtual environment...\n'
    python3 -m venv --clear .venv || fail \
        "Could not create .venv. Make sure your Python installation includes venv support."
else
    printf 'Using existing virtual environment.\n'
fi

printf 'Installing dependencies...\n'
".venv/bin/python" -m pip install -r requirements.txt || fail \
    "Dependency installation failed."

printf '\nInstallation completed successfully.\n'
printf 'You can now run radioeins-top100.command.\n'