#!/usr/bin/env bash
set -euo pipefail

packager=${1:?packager must be deb or rpm}
version=${2:?version is required}
release_root=${3:?release target directory is required}
dist_dir=${4:-dist}
mkdir -p "$dist_dir"

if [[ "$packager" == "deb" ]]; then
    architecture=amd64
    system_dependencies=("libc6" "libgcc-s1")
else
    architecture=amd64
    system_dependencies=("glibc" "libgcc")
fi

make_package() {
    local name=$1 description=$2
    shift 2
    local config
    config=$(mktemp)
    local contents=()
    while [[ $# -gt 0 && "$1" == content:* ]]; do
        contents+=("${1#content:}")
        shift
    done
    local dependencies=("$@")
    {
        echo "name: $name"
        echo "arch: $architecture"
        echo "platform: linux"
        echo "version: $version"
        echo "release: 1"
        echo "section: utils"
        echo "priority: optional"
        echo "maintainer: Elias Wendland <eliaswendland@pm.me>"
        echo "description: $description"
        echo "license: GPL-3.0-only"
        echo "homepage: https://git.ewenlau.net/ewenlau/convertis"
        if [[ "$name" == "convertis" ]]; then
            echo "provides:"
            echo "  - convertis-plugin-api-2"
        fi
        if [[ ${#contents[@]} -gt 0 ]]; then
            echo "contents:"
            for mapping in "${contents[@]}"; do
                destination=${mapping#*::}
                echo "  - src: ${mapping%%::*}"
                echo "    dst: $destination"
                echo "    file_info:"
                if [[ "$destination" == /usr/bin/* || "$destination" == *.so ]]; then
                    echo "      mode: 0755"
                else
                    echo "      mode: 0644"
                fi
            done
        fi
        if [[ ${#dependencies[@]} -gt 0 ]]; then
            echo "depends:"
            for dependency in "${dependencies[@]}"; do
                echo "  - $dependency"
            done
        fi
    } > "$config"
    nfpm package --config "$config" --packager "$packager" --target "$dist_dir/"
    rm -f "$config"
}

make_package convertis "Plugin-based universal file converter" \
    "content:${release_root}/convertis::/usr/bin/convertis" \
    "content:target/man/convertis.1::/usr/share/man/man1/convertis.1" \
    "content:README.md::/usr/share/doc/convertis/README.md" \
    "content:LICENSE::/usr/share/doc/convertis/LICENSE" \
    "content:packaging/plugin-catalog.json::/usr/share/convertis/plugin-catalog.json" \
    "${system_dependencies[@]}"