# Copyright: (c) 2019, Andrew Klychkov (@Andersson007) <aaklychkov@mail.ru>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

# Preparation:
- name: Create user for replication
  shell: "echo \"GRANT REPLICATION SLAVE ON *.* TO '{{ replication_user }}'@'localhost' IDENTIFIED BY '{{ replication_pass }}'; FLUSH PRIVILEGES;\" | mysql -P {{ master_port }} -h 127.0.0.1"

- name: Create test database
  mysql_db:
    login_host: 127.0.0.1
    login_port: '{{ master_port }}'
    state: present
    name: '{{ test_db }}'

- name: Dump all databases from the master
  shell: 'mysqldump -P {{ master_port }} -h 127.0.01 --all-databases --master-data=2 > {{ dump_path }}'

- name: Restore the dump to the standby
  shell: 'mysql -P {{ standby_port }} -h 127.0.0.1 < {{ dump_path }}'

# Test getmaster mode:
- name: Get master status
  mysql_replication:
    login_host: 127.0.0.1
    login_port: "{{ master_port }}"
    mode: getmaster
  register: master_status

- assert:
    that:
    - master_status.Is_Master == true
    - master_status.Position != 0
    - master_status is not changed

# Test changemaster mode:
# master_ssl_ca will be set as '' to check the module's behaviour for #23976,
# must be converted to an empty string
- name: Run replication
  mysql_replication:
    login_host: 127.0.0.1
    login_port: "{{ standby_port }}"
    mode: changemaster
    master_host: 127.0.0.1
    master_port: "{{ master_port }}"
    master_user: "{{ replication_user }}"
    master_password: "{{ replication_pass }}"
    master_log_file: "{{ master_status.File }}"
    master_log_pos: "{{ master_status.Position }}"
    master_ssl_ca: ''
  register: result

- assert:
    that:
    - result is changed
    - result.queries == ["CHANGE MASTER TO MASTER_HOST='127.0.0.1',MASTER_USER='replication_user',MASTER_PASSWORD='********',MASTER_PORT=3306,MASTER_LOG_FILE='{{ master_status.File }}',MASTER_LOG_POS={{ master_status.Position }},MASTER_SSL_CA=''"]

# Test startslave mode:
- name: Start slave
  mysql_replication:
    login_host: 127.0.0.1
    login_port: "{{ standby_port }}"
    mode: startslave
  register: result

- assert:
    that:
    - result is changed
    - result.queries == ["START SLAVE"]

# Test getslave mode:
- name: Get standby status
  mysql_replication:
    login_host: 127.0.0.1
    login_port: "{{ standby_port }}"
    mode: getslave
  register: slave_status

- assert:
    that:
    - slave_status.Is_Slave == true
    - slave_status.Master_Host == '127.0.0.1'
    - slave_status.Exec_Master_Log_Pos == master_status.Position
    - slave_status.Master_Port == {{ master_port }}
    - slave_status.Last_IO_Errno == 0
    - slave_status.Last_IO_Error == ''
    - slave_status is not changed

# Create test table and add data to it:
- name: Create test table
  shell: "echo \"CREATE TABLE {{ test_table }} (id int);\" | mysql -P {{ master_port }} -h 127.0.0.1 {{ test_db }}"

- name: Insert data
  shell: >
    echo "INSERT INTO {{ test_table }} (id) VALUES (1), (2), (3); FLUSH LOGS;" |
    mysql -P {{ master_port }} -h 127.0.0.1 {{ test_db }}

- name: Small pause to be sure the bin log, which was flushed previously, reached the slave
  pause:
    seconds: 2

# Test master log pos has been changed:
- name: Get standby status
  mysql_replication:
    login_host: 127.0.0.1
    login_port: "{{ standby_port }}"
    mode: getslave
  register: slave_status

# master_status.Position is not actual and it has been changed by the prev step,
# so slave_status.Exec_Master_Log_Pos must be different:
- assert:
    that:
    - slave_status.Exec_Master_Log_Pos != master_status.Position

# Test stopslave mode:
- name: Stop slave
  mysql_replication:
    login_host: 127.0.0.1
    login_port: "{{ standby_port }}"
    mode: stopslave
  register: result

- assert:
    that:
    - result is changed
    - result.queries == ["STOP SLAVE"]