#!/usr/bin/env bash

help()
{
    echo "Usage: markdown-image-upload.sh <repo> <tag> <img_dir> <markdown_file>"
}

[ "$4" = "" ] && help && exit 0

repo="$1"
tag="$2"
img_dir="$3"
file="$4"
dir_path=$(dirname "$file")
file_name=$(basename "$file")

(
    cd "$dir_path" || exit 1

    images=$(grep -o "$img_dir"'[^")]*' "$file_name")
    [ -z "$images" ] && echo "No images found." && return

    echo "$images" | while read -r img; do
        [ -f "$img" ] || { echo "Skip missing: $img"; continue; }
        echo "Optimizing: $img"
        npx -y imageoptim-cli "$img"
        echo "Uploading:  $img"
        gh release upload "$tag" "$img" -R "$repo" --clobber
    done

    sed -i '' "s|$img_dir|https://github.com/$repo/releases/download/$tag/|g" "$file_name"
    echo "✅ Complete!"
)