#!/usr/bin/env nix-shell
#!nix-shell -i bash -p curl jq git moreutils yarn2nix nix nix-prefetch
set -euo pipefail

BASE_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
cd "${BASE_DIR}"

json_get() {
    jq -r "$1" < 'meta.json'
}

json_set() {
    jq --arg x "$2" "$1 = \$x" < 'meta.json' | sponge 'meta.json'
}

# Frontend
old_frontend_rev=$(json_get '.frontend.rev')
new_frontend_rev=$(curl -L "https://api.github.com/repos/TeamPiped/Piped/commits" 2>/dev/null | jq ".[0].sha" -r)
if [ "$new_frontend_rev" != "$old_frontend_rev" ]; then
    echo "Frontend is out of date. Updating..."
    json_set '.frontend.rev' "$new_frontend_rev"
    #new_frontend_sha256=$(nix-prefetch fetchFromGitHub --owner TeamPiped --repo Piped --rev "$new_frontend_rev")
    #json_set '.frontend.sha256' "$new_frontend_sha256"

    #TMP=$(mktemp -d)
    #pushd "$TMP"
    #    git clone https://github.com/TeamPiped/Piped
    #    pushd Piped
    #        git reset --hard "$new_frontend_rev"
    #        yarn2nix > "${BASE_DIR}/frontend/yarn.nix"
    #    popd
    #popd
fi

# Backend
old_backend_rev=$(json_get '.backend.rev')
new_backend_rev=$(curl -L "https://api.github.com/repos/TeamPiped/Piped-Backend/commits" 2>/dev/null | jq ".[0].sha" -r)
if [ "$new_backend_rev" != "$old_backend_rev" ]; then
    echo "Backend is out of date. Updating..."
    json_set '.backend.rev' "$new_backend_rev"
    #new_backend_sha256=$(nix-prefetch fetchFromGitHub --owner TeamPiped --repo Piped-Backend --rev "$new_backend_rev")
    #json_set '.backend.sha256' "$new_backend_sha256"
fi

# Proxy
old_proxy_rev=$(json_get '.proxy.rev')
new_proxy_rev=$(curl -L "https://api.github.com/repos/TeamPiped/piped-proxy/commits" 2>/dev/null | jq ".[0].sha" -r)
if [ "$new_proxy_rev" != "$old_proxy_rev" ]; then
    echo "Proxy is out of date. Updating..."
    json_set '.proxy.rev' "$new_proxy_rev"
    #new_proxy_sha256=$(nix-prefetch fetchFromGitHub --owner TeamPiped --repo piped-proxy --rev "$new_proxy_rev")
    #json_set '.proxy.sha256' "$new_proxy_sha256"
fi