#!/usr/bin/env bash
if ! [ -e deploy_key ] || ! [ -e secrets.nix ]
then
  git crypt unlock
	sudo chgrp nixbld deploy_key
	chmod 640 deploy_key
fi
export NIX_PATH="ssh-id-file=$PWD/deploy_key":secrets=$PWD/secrets.nix:yori-nix=$PWD
function get_channel {
    case $1 in
        git)
	          echo "nixpkgs=https://github.com/NixOS/nixpkgs/archive/master.tar.gz"
	          ;;
        stable)
            echo "nixpkgs=https://nixos.org/channels/nixos-18.03/nixexprs.tar.xz"
	          ;;
        checkout)
            echo "nixpkgs=$PWD/../projects/nixpkgs"
            ;;
        channel)
	          echo "/nix/var/nix/profiles/per-user/root/channels/nixos"
	          ;;
    esac
}
case $1 in
    cloc)
        exec cloc --read-lang-def=deploy/nix_cloc .
        ;;
    copy-keys)
        $0 exec "$2" nix build -f "\\<nixpkgs/nixos\\>" config.deployment.keys-copy --out-link copy-keys
        TARGET_HOST=$(jq -r ".$2.host"<servers.json)
        ./copy-keys/bin/copy-keys "$TARGET_HOST"
        # rm ./copy-keys
        ;;
    exec)
        CHANNEL=$(jq -r ".$2.pkgs"<servers.json)
        export NIX_PATH="$(get_channel "$CHANNEL"):nixos-config=$PWD/logical/$2.nix:$NIX_PATH"
        eval "${@:3}"
        ;;
    ssh)
        TARGET_HOST=$(jq -r ".$2.host"<servers.json)
        ssh root@"$TARGET_HOST"
        ;;
    repl)
        exec "$0" exec "$2" nix repl "\\<nixpkgs\\>" "\\<nixpkgs/nixos\\>"
        ;; 
    build)
        exec "$0" exec "$2" nixos-rebuild build
        ;; 
    copy)
        TARGET_HOST=$(jq -r ".$2.host"<servers.json)
        exec "$0" exec "$2" nixos-rebuild build --build-host localhost --target-host root@"$TARGET_HOST"
        ;; 
    boot)
        TARGET_HOST=$(jq -r ".$2.host"<servers.json)
        exec "$0" exec "$2" nixos-rebuild --build-host localhost --target-host root@"$TARGET_HOST" boot
        ;;
    switch)
        TARGET_HOST=$(jq -r ".$2.host"<servers.json)
        exec "$0" exec "$2" nixos-rebuild --build-host localhost --target-host root@"$TARGET_HOST" switch
        ;;
    
    
esac