#!/usr/bin/env bash

args=("$@")
readonly base_url="https://api.my-mc.link/"
readonly headers=( -H "Accept: application/json" -H "Content-Type: application/json" -H "x-my-mc-auth: ${MY_MC_API_KEY}" )


# command format: '<endpoint> <method> [options]'

declare -rA commands=(
    [hello]='hello GET'
    [time]='time GET'
    [stats]='stats GET'
    [log]='log GET'
    [start]='start GET'
    [stop]='stop GET'
    [restart]='restart GET'
    [my-link]='my-link GET'
    [my-geyser-link]='my-geyser-link GET'
    [my-sftp]='my-sftp GET'
    [my-hash]='my-hash GET'
    [my-geyser-hash]='my-geyser-hash GET'
    [my-hash-sftp]='my-hash-sftp GET'
    [list-players]='list-players GET'
    [website]='website GET'
    [map]='map GET'
    [status-minecraft]='status/Minecraft GET'
    [status-bedrock]='status/Bedrock GET'
    [status-sftp]='status/SFTP GET'
    [ban]='ban POST {"username":"%s"}'
    [unban]='unban POST {"username":"%s"}'
    [say]='say POST {"message":"%s"}'
    [tell]='tell POST {"username":"%s","message":"%s"}'
    [console]='console POST {"command":"%s"}'
    [give]='give POST {"username":"%s","item":"%s","amount":"%s"}'
    [install]='install POST {"mod":"%s"}'
    [uninstall]='uninstall POST {"mod":"%s"}'
    [search]='search POST {"mod":"%s"}'
    [mod-list]='mod-list GET'
    [backup]='backup FUNC'
    [connect]='connect FUNC'
)

function connect() {
    if [[ ! $(which docker) ]]; then echo "docker is required"; exit 1; fi
    docker run --rm \
               -e MODE=my-mc \
               -e PORT=25565 \
               -e HOST=0.0.0.0 \
               -e PUBLIC=false \
               -e MY_MC_API_KEY=$MY_MC_API_KEY \
               -p 25565:25565 anaxios/holesail:testing
    echo ""
}

function backup() {
    if [[ ! $(which lftp) ]]; then echo "lftp is required"; exit 1; fi

	local sftp_credentials="$(mc my-sftp)"
	if [[ "$(jq -r '.success' <<<"${sftp_credentials}" )" != "true" ]]; then 
		echo "ERROR: failed to get sftp login info"; 
		exit 1; 
	fi

	local host="$(jq -r '.hostname' <<<"${sftp_credentials}")"
	local username="$(jq -r '.user' <<<"${sftp_credentials}")"
	local port="$(jq -r '.port' <<<"${sftp_credentials}")"
	local password="$(jq -r '.password' <<<"${sftp_credentials}")"

    local localdir="${MY_MC_BACKUP_DIR:-${HOME}/my-mc_backup/}"
    if [[ ! -d ${localdir} ]]; then mkdir -p ${localdir}; fi

    pushd "${localdir}"

    lftp -u "${username}","${password}" "${host}":"${port}" \
         -e "set sftp:connect-program 'ssh -o StrictHostKeyChecking=no'; mirror -c --use-pget minecraft/ minecraft/; quit"

    popd
}


function first() {
    echo "$1" 
}

function second() {
    first $(rest "${@}")
}

function rest() {
    drop 1 "$@"
}

function drop() {
    if (( 1 == "$#" )); then
        return 0
    fi

    if (( "$#" < 1 )); then
        return 1
    fi

    shift $(( 1 + $1 )) 
    echo "$@" 
}

function usage() {
    printf "API key for my-mc must be exported using 'export MY_MC_API_KEY=<my-mc api key>'\n\n"
    printf "Backup directory can be changed from default ~/mc-mc_backup/ by using 'export MY_MC_BACKUP_DIR=</path/to/dir/>'\n\n"
    printf "Positional arguments will fill the JSON objects with values from left to right.\n\n"
    printf "COMMANDS:\n"
    for command in "${!commands[@]}"; do
        echo -e "\t ${command} $(rest $(rest ${commands[${command}]}))" | sed 's/[":]//g' |sed 's/%s//g'| sed 's/[,]/ /g'
    done
    printf "\n"
}


function main() {
    # remove command from arg list while preserving quoted strings.
    args=("${args[@]:1}")
    
    if [[ ! $(which jq) ]]; then echo "jq is required"; exit 1; fi
    
    for command in "${!commands[@]}"; do
        if [[ "$1" == "${command}" ]]; then
            case "$(second ${commands[$1]})" in
                "POST")
                    curl -sS "${headers[@]}" -X "$(second ${commands[$1]})" "${base_url}$(first ${commands[$1]})" \
                         -d "$(printf "$(drop 2 ${commands[$1]})\n" "${args[@]}")"
                    echo ""
                    ;;
                "GET") 
                    curl -sS "${headers[@]}" -X "$(second ${commands[$1]})" "${base_url}$(first ${commands[$1]})"
                    echo ""
                    ;;
                "FUNC") 
                    eval "$(first ${commands[$1]})"
                    ;;
                *)
                    echo "ERROR: Invalid state. Check for typo in command array."
                    ;;
            esac
    
            exit 0
        fi
    done
    
    printf "${0}: invalid option -- $1\n"
    usage
    exit 1
}


if [[ "$(basename "$0")" == "mc" ]]; then
    main "${args[@]}"
fi