#!/bin/bash

check_command() {
    command -v $1 >/dev/null 2>&1
}

check_version() {
    act_runner_version=$(act_runner -v | grep -o 'v[0-9]\+\.[0-9]\+\.[0-9]\+')
    echo $act_runner_version
}

if check_command act_runner; then
    current_version=$(check_version)
    echo "Current act_runner version: $current_version"
fi

required_commands=("curl" "jq" "wget" "unxz" "sha256sum")
for cmd in "${required_commands[@]}"; do
    if ! check_command $cmd; then
        echo "Error: '$cmd' command not found. Please make sure all required commands are installed."
        exit 1
    fi
done

arch=$(uname -m)
if [ "$arch" = "x86_64" ]; then
    arch="amd64"
fi

json=$(curl -s https://gitea.com/api/v1/repos/gitea/act_runner/releases/latest)
latest_version=$(echo $json | jq -r '.tag_name')
url_checksum=$(echo $json | jq -r '.assets[] | select(.name | contains("linux-'$arch'") and contains(".xz.sha256")) | .browser_download_url')
url_binary=$(echo $json | jq -r '.assets[] | select(.name | contains("linux-'$arch'") and contains(".xz")) | .browser_download_url')
checksum_filename=$(basename $url_checksum)
filename=$(basename $url_binary)

if [ -z "$current_version" ] || [ "$current_version" != "$latest_version" ]; then
    echo "Updating act_runner to version: $latest_version"
    wget $url_binary
    sha256sum -c $checksum_filename
    rm $checksum_filename
    unxz $filename
    filename=$(echo $filename | sed 's/\.xz$//')
    mv $filename '/usr/local/bin/act_runner'
    chmod +x /usr/local/bin/act_runner
    echo "Update completed."
else
    echo "act_runner is up to date."
fi