#!/bin/bash
set -e # Exit immediately if a command exits with a non-zero status.

cd $(dirname $0) # Move to the directory of the script
source ./version # Source the version file to set environment variables

# Check if the charts-build-scripts binary exists in the ../bin directory
if ls ../bin/charts-build-scripts 1>/dev/null 2>/dev/null; then
    # Use awk to split the version output correctly and extract the version number
    CURRENT_SCRIPT_VERSION="v$(../bin/charts-build-scripts --version | awk '{print $3}')"
    echo "Current version: ${CURRENT_SCRIPT_VERSION}, Expected version: ${CHARTS_BUILD_SCRIPT_VERSION}"
    # Exit if the current version matches the expected version
    if [[ "${CURRENT_SCRIPT_VERSION}" == "${CHARTS_BUILD_SCRIPT_VERSION}" ]]; then
        exit 0
    fi
fi

echo "Downloading charts-build-scripts version ${CHARTS_BUILD_SCRIPTS_REPO}@${CHARTS_BUILD_SCRIPT_VERSION}"

# Remove existing ../bin directory and change to the parent dir.
rm -rf ../bin
cd ..

mkdir -p bin # Re-create bin dir

# Extract the OS and architecture from the go version command output
OS=$(go version | cut -d' ' -f4 | cut -d'/' -f1)
ARCH=$(go version | cut -d' ' -f4 | cut -d'/' -f2)

# Determine the binary name based on the OS and architecture
if [[ "$OS" == "windows" ]]; then
    BINARY_NAME="charts-build-scripts_${OS}_${ARCH}.exe"
else
    BINARY_NAME="charts-build-scripts_${OS}_${ARCH}"
fi

# Download the binary from the charts-build-scripts repository
curl -s -L ${CHARTS_BUILD_SCRIPTS_REPO%.git}/releases/download/${CHARTS_BUILD_SCRIPT_VERSION}/${BINARY_NAME} --output bin/charts-build-scripts

# If the binary is not found or contains "Not Found", Fall back to binary name format from old release scheme
if ! [[ -f bin/charts-build-scripts ]] || [[ $(cat bin/charts-build-scripts) == "Not Found" ]]; then
    echo "Falling back to old binary name format..."
    rm bin/charts-build-scripts; # Remove the not found old binary
    # Determine the fallback binary name.
    if [[ ${OS} == "linux" ]]; then
        BINARY_NAME=charts-build-scripts
    else
        BINARY_NAME=charts-build-scripts-${OS}
    fi
    # Attempt to download the binary using the fallback name.
    curl -s -L ${CHARTS_BUILD_SCRIPTS_REPO%.git}/releases/download/${CHARTS_BUILD_SCRIPT_VERSION}/${BINARY_NAME} --output bin/charts-build-scripts
fi

# If falling back to old binary name format did not work, fail
if ! [[ -f bin/charts-build-scripts ]] || [[ $(cat bin/charts-build-scripts) == "Not Found" ]]; then
    echo "Failed to find charts-build-scripts binary"
    rm bin/charts-build-scripts;
    exit 1
fi

echo "${BINARY_NAME} => ./bin/charts-build-scripts"

chmod +x ./bin/charts-build-scripts
./bin/charts-build-scripts --version