#!/bin/bash

#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

DEFAULT_ETCD_IMAGE_NAME="bitnami/etcd"
DEFAULT_ETCD_IMAGE_TAG="3.5.7"

DEFAULT_APISIX_IMAGE_NAME="apache/apisix"
DEFAULT_APISIX_IMAGE_TAG="3.10.0-debian"

DEFAULT_ETCD_LISTEN_PORT=2379
DEFAULT_APISIX_PORT=9180

DEFAULT_ETCD_NAME="etcd-quickstart"
DEFAULT_APP_NAME="apisix-quickstart"
DEFAULT_NET_NAME="apisix-quickstart-net"

usage() {
  echo "Runs a Docker based Apache APISIX."
  echo
  echo "See the document for more information:"
  echo "  https://docs.api7.ai/apisix/getting-started"
  exit 0
}

echo_fail() {
  printf "\e[31m✘ \e[0m$@\n"
}

echo_pass() {
  printf "\e[32m✔ \e[0m$@\n"
}

echo_warning() {
  printf "\e[33m⚠ $@\e[0m\n"
}

ensure_docker() {
  {
    docker ps -q >/dev/null 2>&1
  } || {
    return 1
  }
}

ensure_curl() {
  {
    curl -h >/dev/null 2>&1
  } || {
    return 1
  }
}

install_apisix() {

  echo "Installing APISIX with the quickstart options."
  echo ""

  echo "Creating bridge network ${DEFAULT_NET_NAME}."

  docker network create -d bridge $DEFAULT_NET_NAME && echo_pass "network ${DEFAULT_NET_NAME} created" || {
    echo_fail "Create network failed!"
    return 1
  }

  echo ""

  echo "Starting the container ${DEFAULT_ETCD_NAME}."
  docker run -d \
    --name ${DEFAULT_ETCD_NAME} \
    --network=$DEFAULT_NET_NAME \
    -e ALLOW_NONE_AUTHENTICATION=yes \
    -e ETCD_ADVERTISE_CLIENT_URLS=http://${DEFAULT_ETCD_NAME}:${DEFAULT_ETCD_LISTEN_PORT} \
    ${DEFAULT_ETCD_IMAGE_NAME}:${DEFAULT_ETCD_IMAGE_TAG} && echo_pass "etcd is listening on ${DEFAULT_ETCD_NAME}:${DEFAULT_ETCD_LISTEN_PORT}" || {
    echo_fail "Start etcd failed!"
    return 1
  }

  echo ""

  APISIX_DEPLOYMENT_ETCD_HOST="[\"http://${DEFAULT_ETCD_NAME}:${DEFAULT_ETCD_LISTEN_PORT}\"]"

  echo "Starting the container ${DEFAULT_APP_NAME}."
  docker run -d \
    --name ${DEFAULT_APP_NAME} \
    --network=$DEFAULT_NET_NAME \
    -p9080:9080 -p9180:9180 -p9443:9443/tcp -p9443:9443/udp -p9090:9092 -p9100:9100 -p9091:9091 \
    -e APISIX_DEPLOYMENT_ETCD_HOST=${APISIX_DEPLOYMENT_ETCD_HOST} \
    ${DEFAULT_APISIX_IMAGE_NAME}:${DEFAULT_APISIX_IMAGE_TAG} && validate_apisix && sleep 2 || {
    echo_fail "Start APISIX failed!"
    return 1
  }

  docker exec ${DEFAULT_APP_NAME} /bin/bash -c "echo '
apisix:
  enable_control: true
  control:
    ip: "0.0.0.0"
    port: 9092
deployment:
  role: traditional
  role_traditional:
    config_provider: etcd
  admin:
    admin_key_required: false
    allow_admin:
      - 0.0.0.0/0
plugin_attr:
  prometheus:
    export_addr:
      ip: 0.0.0.0
      port: 9091
  ' > /usr/local/apisix/conf/config.yaml"
  docker exec ${DEFAULT_APP_NAME} apisix reload >>/dev/null 2>&1

  echo_warning "WARNING: The Admin API key is currently disabled. You should turn on admin_key_required and set a strong Admin API key in production for security."

  echo ""
}

destroy_apisix() {
  echo "Destroying existing ${DEFAULT_APP_NAME} container, if any."
  echo ""
  docker rm -f $DEFAULT_APP_NAME >>/dev/null 2>&1
  docker rm -f $DEFAULT_ETCD_NAME >>/dev/null 2>&1
  docker network rm $DEFAULT_NET_NAME >>/dev/null 2>&1
  sleep 2
}

validate_apisix() {
  local rv=0
  retry 30 curl "http://localhost:${DEFAULT_APISIX_PORT}/apisix/admin/services" >>/dev/null 2>&1 && echo_pass "APISIX is up" || rv=$?
}

main() {
  ensure_docker || {
    echo_fail "Docker is not available, please install it first"
    exit 1
  }

  ensure_curl || {
    echo_fail "curl is not available, please install it first"
    exit 1
  }

  destroy_apisix

  install_apisix || {
    exit 1
  }

  echo_pass "APISIX is ready!"
}

main "$@"