---
- debug:
    msg: "{{ props }}"
  when: debug

- name: "Ensure replication user exists on master"
  mysql_user:
    login_unix_socket: /run/mysqld/mysqld.sock
    login_password: "{{ mysql_root_password }}"
    name: "{{ mysql_replication_user.name }}"
    host: "{{ mysql_replication_user.host | default('%') }}"
    password: "{{ mysql_replication_user.password }}"
    priv: "{{ mysql_replication_user.priv | default('*.*:REPLICATION SLAVE,REPLICATION CLIENT') }}"
    state: present
  when:
    - props[inventory_hostname].mysql_replication_role == 'master'
    - mysql_replication_user.name is defined
    - (mysql_replication_master | length) > 0

- name: "Create temporarily backup user on master instance to dump all DBs"
  mysql_user:
    login_unix_socket: /run/mysqld/mysqld.sock
    login_password: "{{ mysql_root_password }}"
    name: "{{ mysqldump_creds.username }}"
    host: "{{ mysqldump_creds.host }}"
    password: "{{ mysqldump_creds.password }}"
    priv: "{{ mysqldump_creds.priv }}"
    state: present
  when:
    - props[inventory_hostname].mysql_replication_role == 'master'
    - import_dump | default(False)

# using shell module due to missing SSL-flag in mysql_db module
- name: "Dumpall DBs"
#  delegate_to: "{{ mysql_replication_slave }}"
#  no_log: True
  no_log: False
  shell: "mysqldump -A -h {{ mysql_replication_master }} -u {{ mysqldump_creds.username }} -p{{ mysqldump_creds.password }} --ssl > {{ backup_target }}"
  register: mysql_dump
  when:
    - props[inventory_hostname].mysql_replication_role == 'slave'
    - import_dump | default(False)

- name: "Check slave replication status"
  mysql_replication:
    mode: getreplica
    login_unix_socket: /run/mysqld/mysqld.sock
    login_password: "{{ mysql_root_password }}"
  ignore_errors: true
  register: slaveinfo
  when:
    - props[inventory_hostname].mysql_replication_role == 'slave'
    - (mysql_replication_master | length) > 0

- name: "DEBUG"
  debug:
    msg: "return slave: {{ slaveinfo.Is_Replica }}"
  when:
    - debug
    - props[inventory_hostname].mysql_replication_role == 'slave'
    - slaveinfo is defined

- name: "Import dumped DBs from mysql-master"
  mysql_db:
    login_unix_socket: /run/mysqld/mysqld.sock
    login_password: "{{ mysql_root_password }}"
    state: import
    name: all
    target: "{{ backup_target }}"
  when:
    - props[inventory_hostname].mysql_replication_role == 'slave'
    - import_dump | default(False)

# TODO SSL TRUST
- name: "Check master replication status."
  mysql_replication:
    mode: getprimary
    login_host: "{{ mysql_replication_master }}"
    login_user: "{{ mysql_replication_user.name }}"
    login_password: "{{ mysql_replication_user.password }}"
    ca_cert: '/tmp/{{ mysql_replication_master }}.ca.crt'
  register: masterinfo
  when:
    - props[inventory_hostname].mysql_replication_role == 'slave'
    - slaveinfo is defined
    - (slaveinfo.Is_Replica is defined and not slaveinfo.Is_Replica) or (slaveinfo.Is_Replica is not defined and slaveinfo is failed)
    - (mysql_replication_master | length) > 0

- name: "Configure replication on the slave"
  mysql_replication:
    mode: changeprimary
    login_unix_socket: /run/mysqld/mysqld.sock
    login_password: "{{ mysql_root_password }}"
    master_host: "{{ mysql_replication_master }}"
    master_user: "{{ mysql_replication_user.name }}"
    master_password: "{{ mysql_replication_user.password }}"
    master_log_file: "{{ masterinfo.File }}"
    master_log_pos: "{{ masterinfo.Position }}"
  ignore_errors: true
  when:
    - props[inventory_hostname].mysql_replication_role == 'slave'
    - slaveinfo is defined
    - (slaveinfo.Is_Replica is defined and not slaveinfo.Is_Replica) or (slaveinfo.Is_Replica is not defined and slaveinfo is failed)
    - mysql_replication_user.name is defined
    - (mysql_replication_master | length) > 0

- name: "Start replication"
  mysql_replication:
    mode: startreplica
    login_unix_socket: /run/mysqld/mysqld.sock
    login_password: "{{ mysql_root_password }}"
  when:
    - props[inventory_hostname].mysql_replication_role == 'slave'
    - slaveinfo is defined
    - (slaveinfo.Is_Replica is defined and not slaveinfo.Is_Replica) or (slaveinfo.Is_Replica is not defined and slaveinfo is failed)
    - (mysql_replication_master | length) > 0