---
- name: 设置实例初始化参数
  ansible.builtin.set_fact:
    pg_profile: "{{ pg_profiles[pg_instance] }}"
    pg_parent_dir: "{{ pg_data_root }}/{{ pg_instance }}"
    pg_data_dir: "{{ pg_data_root }}/{{ pg_instance }}/data"
    pg_config_dir: "{{ pg_config_root }}/{{ pg_instance }}"
    pg_bootstrap_password: "{{ hostvars['localhost'].pg_loaded_credentials[pg_instance].ayatori_password }}"
    pg_socket_dir: "/run/homelab-postgresql-{{ pg_instance }}"
  no_log: true
- name: 检查版本标记
  ansible.builtin.stat:
    path: "{{ pg_data_dir }}/PG_VERSION"
  register: pg_version_file
- name: 核对未初始化目录为空
  ansible.builtin.find:
    paths: "{{ pg_data_dir }}"
    hidden: true
    file_type: any
  register: pg_initial_files
  when: not pg_version_file.stat.exists
- name: 禁止覆盖不完整或未知数据
  ansible.builtin.assert:
    that: pg_version_file.stat.exists or pg_initial_files.matched == 0
- name: 初始化独立开发实例
  when: pg_instance == 'dev' and not pg_version_file.stat.exists
  block:
    - name: 临时写入开发管理员密码
      ansible.builtin.copy:
        content: "{{ hostvars['localhost'].pg_loaded_credentials.dev.superuser_password }}\n"
        dest: "{{ pg_parent_dir }}/.init-password"
        owner: "{{ pg_profile.user }}"
        mode: '0600'
      no_log: true
    - name: 仅在空目录初始化
      ansible.builtin.command:
        argv:
          - "{{ pg_bin_dir }}/initdb"
          - -D
          - "{{ pg_data_dir }}"
          - --username={{ pg_profile.user }}
          - --pwfile={{ pg_parent_dir }}/.init-password
          - --auth-local=peer
          - --auth-host=scram-sha-256
          - --encoding=UTF8
          - --locale=C.UTF-8
          - --data-checksums
      become: true
      become_user: "{{ pg_profile.user }}"
      changed_when: true
      no_log: true
  always:
    - name: 删除临时初始化密码文件
      ansible.builtin.file:
        path: "{{ pg_parent_dir }}/.init-password"
        state: absent
- name: 登记专属数据目录（启动失败后仍可辨认来源）
  ansible.builtin.copy:
    content: "shared-postgresql/{{ pg_instance }}\n"
    dest: "{{ pg_parent_dir }}/.homelab-owned"
    owner: root
    mode: '0644'
- name: 启动配置完成的新实例
  ansible.builtin.systemd_service:
    name: "homelab-postgresql-{{ pg_instance }}"
    daemon_reload: true
    enabled: true
    state: started
- name: 等待本机 SQL 可连接
  ansible.builtin.command:
    argv:
      - '{{ pg_bin_dir }}/psql'
      - -X
      - -At
      - -h
      - '{{ pg_socket_dir }}'
      - -p
      - '{{ pg_profile.port | string }}'
      - -d
      - postgres
      - -c
      - SELECT 1
  become: true
  become_user: "{{ pg_profile.user }}"
  register: pg_ready
  until: pg_ready.rc == 0
  retries: 30
  delay: 2
  changed_when: false
- name: 核对本节点是否可写
  ansible.builtin.command:
    argv:
      - '{{ pg_bin_dir }}/psql'
      - -X
      - -At
      - -h
      - '{{ pg_socket_dir }}'
      - -p
      - '{{ pg_profile.port | string }}'
      - -d
      - postgres
      - -c
      - SELECT NOT pg_is_in_recovery()
  become: true
  become_user: "{{ pg_profile.user }}"
  register: pg_is_primary
  changed_when: false
- name: 在可写实例创建 Ayatori 最小管理账号
  when: pg_is_primary.stdout | trim == 't'
  block:
    - name: 查询 Ayatori 账号
      ansible.builtin.command:
        argv:
          - '{{ pg_bin_dir }}/psql'
          - -X
          - -At
          - -h
          - '{{ pg_socket_dir }}'
          - -p
          - '{{ pg_profile.port | string }}'
          - -d
          - postgres
          - -c
          - SELECT count(*) FROM pg_roles WHERE rolname = 'ayatori'
      become: true
      become_user: "{{ pg_profile.user }}"
      register: pg_ayatori_exists
      changed_when: false
    - name: 首次建立受限角色（不静默轮换已存在密码）
      ansible.builtin.command:
        argv:
          - '{{ pg_bin_dir }}/psql'
          - -X
          - -v
          - ON_ERROR_STOP=1
          - -h
          - '{{ pg_socket_dir }}'
          - -p
          - '{{ pg_profile.port | string }}'
          - -d
          - postgres
        stdin: >-
          CREATE ROLE ayatori LOGIN NOSUPERUSER CREATEDB CREATEROLE NOREPLICATION NOBYPASSRLS
          PASSWORD '{{ pg_bootstrap_password | replace("'", "''") }}';
      become: true
      become_user: "{{ pg_profile.user }}"
      when: pg_ayatori_exists.stdout | trim == '0'
      changed_when: true
      no_log: true
    - name: 以实际保存密码及 verify-full 验证权限
      ansible.builtin.command:
        argv:
          - "{{ pg_bin_dir }}/psql"
          - -X
          - -At
          - -c
          - >-
            SELECT NOT rolsuper AND rolcreatedb AND rolcreaterole AND NOT pg_is_in_recovery()
            FROM pg_roles WHERE rolname = current_user
      environment:
        PGHOST: "{{ pg_profile.dns }}"
        PGHOSTADDR: "{{ pg_address }}"
        PGPORT: "{{ pg_profile.port | string }}"
        PGDATABASE: postgres
        PGUSER: ayatori
        PGPASSWORD: "{{ hostvars['localhost'].pg_loaded_credentials[pg_instance].ayatori_password }}"
        PGSSLMODE: verify-full
        PGSSLROOTCERT: "{{ pg_config_dir }}/ca.crt"
      register: pg_ayatori_check
      changed_when: false
      failed_when: pg_ayatori_check.rc != 0 or pg_ayatori_check.stdout | trim != 't'
      no_log: true