#!/bin/bash
set -eo pipefail

COLOR_RED="\e[0;31m"
COLOR_GREEN="\e[0;32m"
COLOR_YELLOW="\e[0;33m"
COLOR_NONE="\e[0m"
function log_info() { echo -e "${COLOR_GREEN}$*${COLOR_NONE}" 1>&2; }
function log_warn() { echo -e "${COLOR_YELLOW}$*${COLOR_NONE}" 1>&2; }
function log_error() { echo -e "${COLOR_RED}$*${COLOR_NONE}" 1>&2; }

log_info "extracting env vars"

function check_env() {
    # $1 -> var name
    # $2 -> default value
    # $3 -> quota or not
    val=$(eval "echo -n \${$1}")
    if test -z "$val"; then
        log_warn "Environment variable $1 is not set, using default value \"$2\""
        export "$1"="$2"
    else
        log_info "Using $1=$val"
    fi

    if "$3"; then
        val=$(eval "echo -n \${$1}")
        # shellcheck disable=SC2140
        export "$1"="'$val'"
    fi

    # echo -n ">>>>> "
    # eval "echo -n \${$1}"
    # echo " <<<<<"
}

check_env "WEB_SERVER_ADDRESS" "0.0.0.0" true
check_env "WEB_SERVER_PORT" 8000 false
check_env "WEB_SERVER_JWT_SIGNING_KEY" "$(head -n 10 /dev/urandom | md5sum | cut -c 1-32)" true
check_env "WEB_SERVER_JWT_EXPIRE_HOUR" 12 false

check_env "REDIS_DB" 0 false
check_env "REDIS_QUEUE_DB" 1 false
check_env "REDIS_ADDRESS" "redis" true
check_env "REDIS_PORT" 6379 false
check_env "REDIS_PASSWORD" "" true

check_env "DATABASE_HOST" "postgres" true
check_env "DATABASE_PORT" 5432 false
check_env "DATABASE_USER" "dev" true
check_env "DATABASE_PASSWORD" "password" true
check_env "DATABASE_NAME" "dev" true
check_env "DATABASE_PREFIX" "oj_" true
check_env "DATABASE_MAX_OPEN_CONNS" 100 false
check_env "DATABASE_MAX_IDLE_CONNS" 60 false
check_env "DATABASE_CONN_MAX_LIFETIME" 60 false

check_env "STORAGE_ENDPOINT" "minio:9000" true
check_env "STORAGE_USE_SSL" "false" false
check_env "STORAGE_ACCESS_KEY" "access_key" true
check_env "STORAGE_SECRET_KEY" "secret_key" true
check_env "STORAGE_BUCKET" "woj" true

check_env "METRICS_NAMESPACE" "woj" true
check_env "METRICS_SUBSYSTEM" "server" true

check_env "DEVELOPMENT" false false

rm -f /tmp/tmp.yaml
(
    echo "cat <<EOF >/app/config.yaml"
    cat /app/config.docker.yaml
    echo "EOF"
) >/tmp/tmp.yaml

if [ -f '/app/config.yaml' ]; then
    log_info "config.yaml already exists, skip"
else
    log_info "creating config.yaml"
    . /tmp/tmp.yaml || (log_error "failed to create config.yaml" && exit 1)
fi

log_info "starting woj"
#cat /app/config.yaml
exec /app/woj "$@"