#!/bin/bash

set -eu

DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# shellcheck source=diachron/versions
source "$DIR/diachron/versions"

# shellcheck source=diachron/platform
source "$DIR/diachron/platform"

# Get platform-specific variables
nodejs_binary_var="nodejs_binary_${platform}"
nodejs_checksum_var="nodejs_checksum_${platform}"
nodejs_dirname_var="nodejs_dirname_${platform}"
nodejs_binary="${!nodejs_binary_var}"
nodejs_checksum="${!nodejs_checksum_var}"
nodejs_dirname="${!nodejs_dirname_var}"

pnpm_binary_var="pnpm_binary_${platform}"
pnpm_checksum_var="pnpm_checksum_${platform}"
pnpm_binary_url="${!pnpm_binary_var}"
pnpm_checksum="${!pnpm_checksum_var}"

cache_dir="$HOME/.cache/diachron/v1/binaries"
local_dir="$DIR/diachron/binaries"
mkdir -p "$cache_dir" "$local_dir"

# read_checksum_file <path>
# Prints the contents of a checksum file, or empty string
# if the file does not exist.
read_checksum_file() {
    if [ -f "$1" ]; then
        cat "$1"
    fi
}

# Ensure Node.js is in the cache
cached_node_checksum=$(read_checksum_file "$cache_dir/.node.checksum")
if [ "$cached_node_checksum" != "$nodejs_checksum" ]; then
    echo "Downloading Node.js for $platform..."
    node_archive="$cache_dir/node.tar.xz"
    curl -fsSL "$nodejs_binary" -o "$node_archive"

    echo "Verifying checksum..."
    echo "$nodejs_checksum  $node_archive" | sha256_check

    echo "Extracting Node.js..."
    rm -rf "${cache_dir:?}/$nodejs_dirname"
    tar -xf "$node_archive" -C "$cache_dir"
    rm "$node_archive"

    echo "$nodejs_checksum" >"$cache_dir/.node.checksum"
fi

# Copy Node.js into the working directory if needed
local_node_checksum=$(read_checksum_file "$local_dir/.node.checksum")
if [ "$local_node_checksum" != "$nodejs_checksum" ]; then
    echo "Installing Node.js into project..."
    rm -rf "${local_dir:?}/$nodejs_dirname"
    cp -R "$cache_dir/$nodejs_dirname" "$local_dir/$nodejs_dirname"
    echo "$nodejs_checksum" >"$local_dir/.node.checksum"
fi

# Ensure pnpm is in the cache
cached_pnpm_checksum=$(read_checksum_file "$cache_dir/.pnpm.checksum")
if [ "$cached_pnpm_checksum" != "$pnpm_checksum" ]; then
    echo "Downloading pnpm for $platform..."
    curl -fsSL "$pnpm_binary_url" -o "$cache_dir/pnpm"

    echo "Verifying checksum..."
    echo "$pnpm_checksum  $cache_dir/pnpm" | sha256_check

    chmod +x "$cache_dir/pnpm"

    echo "$pnpm_checksum" >"$cache_dir/.pnpm.checksum"
fi

# Copy pnpm into the working directory if needed
local_pnpm_checksum=$(read_checksum_file "$local_dir/.pnpm.checksum")
if [ "$local_pnpm_checksum" != "$pnpm_checksum" ]; then
    echo "Installing pnpm into project..."
    cp "$cache_dir/pnpm" "$local_dir/pnpm"
    echo "$pnpm_checksum" >"$local_dir/.pnpm.checksum"
fi

# Get golang binaries in place
cd "$DIR/master"
go build

cd "$DIR/logger"
go build

# Update framework code
cd "$DIR/backend"
../cmd pnpm install