---
- name: Wireguard config generator
  hosts: localhost
  vars:
    mask_bits: 24
    base_ip: 10.2.0.0
    port: 51871
    keepalived_ip: 10.2.0.100
  tasks:
  - name: generate keypair
    shell: |
      #!/bin/sh
      priv="$(wg genkey)"
      pub="$(echo "$priv" | wg pubkey)"
      base_ip="{{ base_ip }}"
      my_ip="$(echo "$base_ip" | sed 's/0$/{{ item }}/')"
      if [[ {{item}} -eq 1 ]]; then
        state=MASTER
      else
        state=BACKUP
      fi
      priority=$((100 - {{ item }}))
      jq --null-input \
        --arg priv "$priv" \
        --arg pub "$pub" \
        --arg my_ip "$my_ip" \
        --arg state "$state" \
        --arg priority "$priority" \
        '{"private_key": $priv, "public_key": $pub, "item": "vm{{ item }}", "ip": $my_ip, "keepalived_state": $state, "keepalived_priority": $priority}'
    with_items: ["1", "2", "3", "4"]
    register: keypairs_
  - set_fact:
      keypairs: "{{ keypairs | default([]) + [item.stdout | from_json] }}"
    with_items: "{{ keypairs_.results }}"
  - debug:
      var: keypairs
    name: write wg configs
  - template:
      src: ./config/wg0.conf.tmpl
      dest: ./config/{{ item.item }}-wg0.conf
    with_items: "{{ keypairs }}"
  - template:
      src: ./config/keepalived.conf.tmpl
      dest: ./config/{{ item.item }}-keepalived.conf
    with_items: "{{ keypairs }}"
  - template:
      src: ./config/index.html.tmpl
      dest: ./config/{{ item.item }}-index.html
    with_items: "{{ keypairs }}"
  - template:
      src: ./docker-compose.yaml.tmpl
      dest: ./docker-compose.yaml