#!/bin/sh
set -e

REPO="Papaya-Voldemort/Lightning-Readme"
BINARY_NAME="readme-gen"
INSTALL_DIR="/usr/local/bin"

RED='\033[0;31m'
GREEN='\033[0;32m'
BLUE='\033[0;34m'
NC='\033[0m'

printf "${BLUE}Starting installation of ${BINARY_NAME}...${NC}\n"

OS_TYPE="$(uname -s | tr '[:upper:]' '[:lower:]')"
case "$OS_TYPE" in
    linux*) OS="linux" ;;
    darwin*) OS="macos" ;;
    msys*|cygwin*|mingw*) OS="windows" ;;
    *)
        printf "${RED}Error: Unsupported OS (%s)${NC}\n" "$OS_TYPE"
        exit 1
        ;;
esac

FILENAME="${BINARY_NAME}-${OS}"
if [ "$OS" = "windows" ]; then
    FILENAME="${FILENAME}.exe"
fi

DOWNLOAD_URL="https://github.com/${REPO}/releases/download/latest/${FILENAME}"

printf "Detecting OS: ${GREEN}${OS}${NC}\n"
printf "Downloading from: ${BLUE}${DOWNLOAD_URL}${NC}\n"

TMP_DIR="$(mktemp -d)"
trap 'rm -rf "$TMP_DIR"' EXIT

if ! curl --fail --location --silent --show-error "$DOWNLOAD_URL" -o "$TMP_DIR/$FILENAME"; then
    printf "${RED}Error: Failed to download binary from GitHub.${NC}\n"
    printf "Make sure a release exists and contains %s.\n" "$FILENAME"
    exit 1
fi

chmod +x "$TMP_DIR/$FILENAME"

if [ "$OS" = "windows" ]; then
    printf "${GREEN}Download complete: %s${NC}\n" "$TMP_DIR/$FILENAME"
    printf "Move the executable to a directory on your PATH.\n"
else
    printf "Installing to %s...\n" "$INSTALL_DIR"

    if [ -w "$INSTALL_DIR" ]; then
        mv "$TMP_DIR/$FILENAME" "$INSTALL_DIR/$BINARY_NAME"
    else
        sudo mv "$TMP_DIR/$FILENAME" "$INSTALL_DIR/$BINARY_NAME"
    fi

    printf "${GREEN}Successfully installed %s! Try running '%s'.${NC}\n" "$BINARY_NAME" "$BINARY_NAME"
fi