---
# Run only in an approved outage with -e atlas_gitea_owner_migration=true.
- name: Move live Gitea from the legacy host account to admin
  tags: [atlas, gitea_owner_migration]
  when: atlas_gitea_owner_migration | bool
  block:
    - name: Refuse a check-mode owner migration
      ansible.builtin.assert:
        that: not ansible_check_mode
        fail_msg: The owner migration requires an explicit live outage.

    - name: Inspect the Gitea dataset owner
      ansible.builtin.stat:
        path: "{{ atlas_gitea_mountpoint }}"
      register: atlas_gitea_migration_owner

    - name: Require either the legacy owner or an already migrated dataset
      ansible.builtin.assert:
        that:
          - atlas_gitea_migration_owner.stat.isdir | default(false)
          - atlas_gitea_migration_owner.stat.uid | int in [atlas_gitea_legacy_uid | int, atlas_admin_uid | int]
        fail_msg: Refusing to modify a Gitea dataset with an unexpected owner.

    - name: Migrate only a legacy-owned Gitea dataset
      when: atlas_gitea_migration_owner.stat.uid | int == atlas_gitea_legacy_uid | int
      block:
        - name: Require the final cutover marker and configuration
          ansible.builtin.stat:
            path: "{{ item }}"
          loop:
            - "{{ atlas_gitea_mountpoint }}/.final-sha256"
            - "{{ atlas_gitea_mountpoint }}/config/app.ini"
          register: atlas_gitea_migration_files

        - name: Refuse migration without both final data and configuration
          ansible.builtin.assert:
            that: atlas_gitea_migration_files.results | map(attribute='stat.isreg') | min

        - name: Check that admin has no existing Gitea Quadlet
          ansible.builtin.stat:
            path: "{{ atlas_gitea_quadlet_dir }}/atlas-gitea.container"
          register: atlas_gitea_admin_quadlet

        - name: Refuse to overwrite an existing admin Quadlet
          ansible.builtin.assert:
            that: not atlas_gitea_admin_quadlet.stat.exists

        - name: Check pool health before the outage
          ansible.builtin.command:
            argv: [zpool, status, -x, "{{ atlas_zfs_pool }}"]
          register: atlas_gitea_pool_before
          changed_when: false
          failed_when: "'is healthy' not in atlas_gitea_pool_before.stdout"

        - name: Ensure the admin Gitea image is available before stopping the source
          ansible.builtin.import_tasks: gitea_image.yml

        - name: Stop, snapshot and test the admin-owned staging service
          block:
            - name: Stop and disable the legacy Gitea user service
              become_user: "{{ atlas_gitea_legacy_username }}"
              ansible.builtin.systemd:
                name: atlas-gitea.service
                scope: user
                state: stopped
                enabled: false
              environment:
                XDG_RUNTIME_DIR: "/run/user/{{ atlas_gitea_legacy_uid }}"
                DBUS_SESSION_BUS_ADDRESS: "unix:path=/run/user/{{ atlas_gitea_legacy_uid }}/bus"

            - name: Record the migration snapshot name
              ansible.builtin.set_fact:
                atlas_gitea_migration_snapshot: >-
                  {{ atlas_gitea_dataset }}@gitea-owner-migration-{{ ansible_facts.date_time.iso8601_basic_short }}

            - name: Snapshot the stopped Gitea dataset for manual recovery
              ansible.builtin.command:
                argv: [zfs, snapshot, "{{ atlas_gitea_migration_snapshot }}"]

            - name: Transfer only the Gitea dataset to admin
              ansible.builtin.file:
                path: "{{ atlas_gitea_mountpoint }}"
                state: directory
                owner: "{{ atlas_admin_username }}"
                group: "{{ atlas_admin_group }}"
                recurse: true

            - name: Set the actual internal Unix process user
              ansible.builtin.lineinfile:
                path: "{{ atlas_gitea_mountpoint }}/config/app.ini"
                regexp: '^RUN_USER\s*='
                line: RUN_USER = gitea
                mode: "0600"
              no_log: true
              diff: false

            - name: Preserve public git clone URLs independently of the Unix user
              community.general.ini_file:
                path: "{{ atlas_gitea_mountpoint }}/config/app.ini"
                section: server
                option: "{{ item }}"
                value: git
                mode: "0600"
                no_extra_spaces: false
              loop: [BUILTIN_SSH_SERVER_USER, SSH_USER]
              no_log: true
              diff: false

            - name: Render admin's loopback-only staging Quadlet
              ansible.builtin.template:
                src: atlas-gitea.container.j2
                dest: "{{ atlas_gitea_quadlet_dir }}/atlas-gitea.container"
                owner: "{{ atlas_admin_username }}"
                group: "{{ atlas_admin_group }}"
                mode: "0644"
              vars:
                atlas_gitea_production_enabled: false

            - name: Reload the admin user manager for staging
              become_user: "{{ atlas_admin_username }}"
              ansible.builtin.systemd:
                scope: user
                daemon_reload: true
              environment:
                XDG_RUNTIME_DIR: "/run/user/{{ atlas_admin_uid }}"
                DBUS_SESSION_BUS_ADDRESS: "unix:path=/run/user/{{ atlas_admin_uid }}/bus"

            - name: Start admin's loopback-only staging service
              become_user: "{{ atlas_admin_username }}"
              ansible.builtin.systemd:
                name: atlas-gitea.service
                scope: user
                state: started
              environment:
                XDG_RUNTIME_DIR: "/run/user/{{ atlas_admin_uid }}"
                DBUS_SESSION_BUS_ADDRESS: "unix:path=/run/user/{{ atlas_admin_uid }}/bus"

            - name: Verify staging HTTP before promotion
              ansible.builtin.uri:
                url: "http://127.0.0.1:{{ atlas_gitea_staging_http_port }}/"
                status_code: 200
              register: atlas_gitea_staging_http
              retries: 30
              delay: 2
              until: atlas_gitea_staging_http is succeeded

            - name: Verify the container really runs as internal gitea
              become_user: "{{ atlas_admin_username }}"
              ansible.builtin.command:
                argv: [podman, exec, atlas-gitea, id, -un]
              environment:
                HOME: "{{ atlas_admin_home }}"
                XDG_RUNTIME_DIR: "/run/user/{{ atlas_admin_uid }}"
              register: atlas_gitea_internal_user
              changed_when: false
              failed_when: atlas_gitea_internal_user.stdout != 'gitea'

            - name: Verify the migrated SQLite database
              ansible.builtin.command:
                argv:
                  - sqlite3
                  - "{{ atlas_gitea_mountpoint }}/data/gitea/gitea.db"
                  - PRAGMA quick_check;
              register: atlas_gitea_migration_sqlite
              changed_when: false
              failed_when: atlas_gitea_migration_sqlite.stdout != 'ok'

          rescue:
            - name: Stop admin's failed staging service
              become_user: "{{ atlas_admin_username }}"
              ansible.builtin.systemd:
                name: atlas-gitea.service
                scope: user
                state: stopped
              environment:
                XDG_RUNTIME_DIR: "/run/user/{{ atlas_admin_uid }}"
                DBUS_SESSION_BUS_ADDRESS: "unix:path=/run/user/{{ atlas_admin_uid }}/bus"
              failed_when: false

            - name: Restore the original Gitea configuration from the safety snapshot
              ansible.builtin.command:
                argv:
                  - cp
                  - -a
                  - "{{ atlas_gitea_mountpoint }}/.zfs/snapshot/{{ atlas_gitea_migration_snapshot.split('@')[1] }}/config/app.ini"
                  - "{{ atlas_gitea_mountpoint }}/config/app.ini"
              when: atlas_gitea_migration_snapshot is defined

            - name: Return the Gitea dataset to the legacy account
              ansible.builtin.file:
                path: "{{ atlas_gitea_mountpoint }}"
                state: directory
                owner: "{{ atlas_gitea_legacy_username }}"
                group: "{{ atlas_gitea_legacy_username }}"
                recurse: true

            - name: Restart the legacy Gitea service
              become_user: "{{ atlas_gitea_legacy_username }}"
              ansible.builtin.systemd:
                name: atlas-gitea.service
                scope: user
                state: started
                enabled: true
              environment:
                XDG_RUNTIME_DIR: "/run/user/{{ atlas_gitea_legacy_uid }}"
                DBUS_SESSION_BUS_ADDRESS: "unix:path=/run/user/{{ atlas_gitea_legacy_uid }}/bus"

            - name: Report the failed migration and preserved snapshot
              ansible.builtin.fail:
                msg: >-
                  Admin staging failed; legacy Gitea was restarted. Inspect
                  {{ atlas_gitea_migration_snapshot | default('the host journal') }}.

        - name: Stop admin's validated staging service
          become_user: "{{ atlas_admin_username }}"
          ansible.builtin.systemd:
            name: atlas-gitea.service
            scope: user
            state: stopped
          environment:
            XDG_RUNTIME_DIR: "/run/user/{{ atlas_admin_uid }}"
            DBUS_SESSION_BUS_ADDRESS: "unix:path=/run/user/{{ atlas_admin_uid }}/bus"

        - name: Render admin's production Gitea Quadlet
          ansible.builtin.template:
            src: atlas-gitea.container.j2
            dest: "{{ atlas_gitea_quadlet_dir }}/atlas-gitea.container"
            owner: "{{ atlas_admin_username }}"
            group: "{{ atlas_admin_group }}"
            mode: "0644"
          vars:
            atlas_gitea_production_enabled: true

        - name: Reload admin's production user manager
          become_user: "{{ atlas_admin_username }}"
          ansible.builtin.systemd:
            scope: user
            daemon_reload: true
          environment:
            XDG_RUNTIME_DIR: "/run/user/{{ atlas_admin_uid }}"
            DBUS_SESSION_BUS_ADDRESS: "unix:path=/run/user/{{ atlas_admin_uid }}/bus"

        - name: Enable and start admin's production Gitea
          become_user: "{{ atlas_admin_username }}"
          ansible.builtin.systemd:
            name: atlas-gitea.service
            scope: user
            state: started
            enabled: true
          environment:
            XDG_RUNTIME_DIR: "/run/user/{{ atlas_admin_uid }}"
            DBUS_SESSION_BUS_ADDRESS: "unix:path=/run/user/{{ atlas_admin_uid }}/bus"

        - name: Verify production HTTP before retiring the old Quadlet
          ansible.builtin.uri:
            url: "http://{{ atlas_gitea_bind_address }}:{{ atlas_gitea_http_port }}/"
            status_code: 200
          register: atlas_gitea_production_http
          retries: 30
          delay: 2
          until: atlas_gitea_production_http is succeeded

        - name: Remove only the disabled legacy Quadlet
          ansible.builtin.file:
            path: "{{ atlas_gitea_legacy_home }}/.config/containers/systemd/atlas-gitea.container"
            state: absent

        - name: Reload the legacy user manager after Quadlet removal
          become_user: "{{ atlas_gitea_legacy_username }}"
          ansible.builtin.systemd:
            scope: user
            daemon_reload: true
          environment:
            XDG_RUNTIME_DIR: "/run/user/{{ atlas_gitea_legacy_uid }}"
            DBUS_SESSION_BUS_ADDRESS: "unix:path=/run/user/{{ atlas_gitea_legacy_uid }}/bus"