#!/usr/bin/env bash

set -euo pipefail

check_license () {
    local dir="$1"
    local allowed_licenses=()
    local agpl_crates=("crates/collab")

    local is_agpl=false
    for agpl_crate in "${agpl_crates[@]}"; do
        if [[ "$dir" == "$agpl_crate" ]]; then
            is_agpl=true
            break
        fi
    done

    if [[ "$is_agpl" == true ]]; then
        allowed_licenses=("LICENSE-AGPL")
    else
        allowed_licenses=("LICENSE-GPL" "LICENSE-APACHE")
    fi

    for license in "${allowed_licenses[@]}"; do
        if [[ -L "$dir/$license" ]]; then
            return 0
        elif [[ -e "$dir/$license" ]]; then
            echo "Error: $dir/$license exists but is not a symlink."
            exit 1
        fi
    done

    if [[ "$dir" == "crates/collab" ]]; then
        echo "Error: $dir does not contain a LICENSE-AGPL symlink"
    else
        echo "Error: $dir does not contain a LICENSE-GPL or LICENSE-APACHE symlink"
    fi
    exit 1
}

git ls-files "**/*/Cargo.toml" | while read -r cargo_toml; do
   check_license "$(dirname "$cargo_toml")"
done