- hosts: all
  gather_facts: no
  serial: "{{ hosts_per_batch | d(1) | int }}"
  strategy: "{{ hosts_strategy | d('linear') }}"
  tasks:
    - name: get primary role
      set_fact:
        host_primary_role: "{%- if primary_role is defined -%}{{ primary_role }}\
                            {%- elif hostvars[inventory_hostname]['primary_role'] is defined -%}{{ hostvars[inventory_hostname]['primary_role'] }}\
                            {%- else -%}{{ inventory_hostname }}\
                            {%- endif -%}"


    - name: import role mappings
      import_tasks: mappings.yml


    - name: fail if mappings are missing
      fail:
        msg: role mappings are missing or invalid
      when: (common_roles is not defined) or (common_roles | type_debug != 'list')


    - name: warn if current role mapping is missing
      debug:
        msg: "mapping for role \"{{ host_primary_role }}\" is missing - using default role mapping at stage 6"
      when: (extra_roles | d({}))[host_primary_role] is not defined


    - name: build role mapping
      set_fact:
        role_mapping: "{{ (((extra_roles | d({}))[host_primary_role] | d([{ 'stage': 6, 'role': host_primary_role }])) +
                           ([] if host_primary_role in (no_common_roles | d([])) else common_roles) +
                           ([{ 'stage': 1, 'role': 'container' }] if 'containers' in group_names else []) +
                           ([{ 'stage': 3, 'role': 'postgres', 'function': 'integrate' }] if host_primary_role in (database_roles | d([])) else [])
                          ) | sort(attribute='stage') }}"


    - name: remember selected stages
      set_fact:
        selected_stages: "{%- if stage is defined and ((stage | string) is search(',')) -%}{{ stage | string | split(',') | list | map('int') | list }}\
                          {%- elif (stage is not defined) or ((stage | int) == 0) -%}{{ [1,2,3,4,5,6,7,8,9] }}\
                          {%- else -%}{{ [stage | int] }}\
                          {%- endif -%}"
        no_log: yes


    - name: show deployment info
      debug:
        msg: "deploying primary role \"{{ host_primary_role }}\" on host \"{{ inventory_hostname }}\", {{
          (('stages ' if (selected_stages | length > 1) else 'stage ') ~ (selected_stages | join(', ')))
           if ([1,2,3,4,5,6,7,8,9] | symmetric_difference(selected_stages) | list | length > 0) else 'all stages' }}"


    - name: run pre_tasks
      include_tasks: tasks/pre_tasks.yml


    - name: run stages
      include_tasks: tasks/includes/stage.yml
      loop: "{{ selected_stages }}"
      loop_control:
        loop_var: this_stage


    - name: show deployment info
      debug:
        msg: "ok: deployment completed on host \"{{ inventory_hostname }}\""