---
- name: Deploy Gitea
  hosts: gitea
  become: true
  tasks:
    - name: Check if host has gitea service
      ansible.builtin.set_fact:
        has_gitea_service: "{{ 'gitea' in services | default([]) }}"

    - name: Skip hosts without gitea service
      ansible.builtin.meta: end_host
      when: not has_gitea_service

    - name: Install required packages
      ansible.builtin.apt:
        name:
          - git
          - git-lfs
          - curl
          - memcached
        state: present
        update_cache: true

    - name: Ensure Memcached is running
      ansible.builtin.service:
        name: memcached
        state: started
        enabled: true

    - name: Create git system group
      ansible.builtin.group:
        name: "{{ gitea_group }}"
        system: true
        state: present

    - name: Create git system user
      ansible.builtin.user:
        name: "{{ gitea_user }}"
        group: "{{ gitea_group }}"
        system: true
        shell: /bin/bash
        home: "{{ gitea_home_dir }}"
        create_home: true
        comment: "Git Version Control"

    - name: Create Gitea directories
      ansible.builtin.file:
        path: "{{ item.path }}"
        state: directory
        owner: "{{ item.owner }}"
        group: "{{ item.group }}"
        mode: "{{ item.mode }}"
      loop:
        - { path: "{{ gitea_work_dir }}", owner: "{{ gitea_user }}", group: "{{ gitea_group }}", mode: "0755" }
        - { path: "{{ gitea_work_dir }}/custom", owner: "{{ gitea_user }}", group: "{{ gitea_group }}", mode: "0755" }
        - { path: "{{ gitea_data_dir }}", owner: "{{ gitea_user }}", group: "{{ gitea_group }}", mode: "0755" }
        - { path: "{{ gitea_lfs_dir }}", owner: "{{ gitea_user }}", group: "{{ gitea_group }}", mode: "0755" }
        - { path: "{{ gitea_repo_root }}", owner: "{{ gitea_user }}", group: "{{ gitea_group }}", mode: "0755" }
        - { path: "/etc/gitea", owner: "root", group: "{{ gitea_group }}", mode: "0770" }

    - name: Get installed Gitea version
      ansible.builtin.command:
        cmd: /usr/local/bin/gitea --version
      register: gitea_installed_version
      changed_when: false
      failed_when: false

    - name: Parse installed version
      ansible.builtin.set_fact:
        gitea_current_version: "{{ gitea_installed_version.stdout | regex_search('([0-9]+\\.[0-9]+\\.[0-9]+)') | default('0.0.0') }}"
      when: gitea_installed_version.rc == 0

    - name: Set current version to 0.0.0 if not installed
      ansible.builtin.set_fact:
        gitea_current_version: "0.0.0"
      when: gitea_installed_version.rc != 0

    - name: Get latest Gitea release version from GitHub
      ansible.builtin.uri:
        url: https://api.github.com/repos/go-gitea/gitea/releases/latest
        return_content: true
      register: gitea_latest_release

    - name: Extract latest version number
      ansible.builtin.set_fact:
        gitea_latest_version: "{{ gitea_latest_release.json.tag_name | regex_replace('^v', '') }}"

    - name: Display version information
      ansible.builtin.debug:
        msg: "Gitea: installed={{ gitea_current_version }}, latest={{ gitea_latest_version }}"

    - name: Stop Gitea before upgrade
      ansible.builtin.systemd:
        name: gitea
        state: stopped
      when:
        - gitea_current_version != gitea_latest_version
        - gitea_current_version != "0.0.0"

    - name: Download Gitea binary
      ansible.builtin.get_url:
        url: "https://dl.gitea.com/gitea/{{ gitea_latest_version }}/gitea-{{ gitea_latest_version }}-linux-amd64"
        dest: /usr/local/bin/gitea
        mode: '0755'
        owner: root
        group: root
        force: true
      when: gitea_current_version != gitea_latest_version
      notify: restart gitea

    - name: Template Gitea configuration
      ansible.builtin.template:
        src: app.ini.j2
        dest: "{{ gitea_config_file }}"
        owner: "{{ gitea_user }}"
        group: "{{ gitea_group }}"
        mode: '0640'
      notify: restart gitea

    - name: Create Gitea systemd service
      ansible.builtin.copy:
        dest: /etc/systemd/system/gitea.service
        mode: '0644'
        owner: root
        group: root
        content: |
          [Unit]
          Description=Gitea (Git with a cup of tea)
          After=syslog.target
          After=network.target
          After=postgresql.service

          [Service]
          RestartSec=2s
          Type=simple
          User={{ gitea_user }}
          Group={{ gitea_group }}
          WorkingDirectory={{ gitea_work_dir }}/
          ExecStart=/usr/local/bin/gitea web --config {{ gitea_config_file }}
          Restart=always
          Environment=USER={{ gitea_user }} HOME={{ gitea_home_dir }} GITEA_WORK_DIR={{ gitea_work_dir }}

          [Install]
          WantedBy=multi-user.target
      notify: restart gitea

    - name: Reload systemd daemon
      ansible.builtin.systemd:
        daemon_reload: true

    - name: Enable and start Gitea service
      ansible.builtin.systemd:
        name: gitea
        enabled: true
        state: started

    # OAuth2 Provider Configuration (Casdoor SSO)
    - name: Flush handlers to ensure Gitea is restarted before healthcheck
      ansible.builtin.meta: flush_handlers

    - name: Wait for Gitea to be ready
      ansible.builtin.uri:
        url: "http://127.0.0.1:{{ gitea_web_port }}/api/healthz"
        method: GET
        status_code: 200
      register: gitea_health
      until: gitea_health.status == 200
      retries: 30
      delay: 5
      when: gitea_oauth_enabled | default(false)

    - name: Check if Casdoor OAuth source exists
      ansible.builtin.command:
        cmd: >
          /usr/local/bin/gitea admin auth list
          --config {{ gitea_config_file }}
      become: true
      become_user: "{{ gitea_user }}"
      register: gitea_auth_list
      changed_when: false
      when: gitea_oauth_enabled | default(false)

    - name: Add Casdoor OAuth2 authentication source
      ansible.builtin.command:
        cmd: >
          /usr/local/bin/gitea admin auth add-oauth
          --config {{ gitea_config_file }}
          --name "{{ gitea_oauth_name }}"
          --provider openidConnect
          --key "{{ gitea_oauth_client_id }}"
          --secret "{{ gitea_oauth_client_secret }}"
          --auto-discover-url "https://id.ouranos.helu.ca/.well-known/openid-configuration"
          --scopes "{{ gitea_oauth_scopes }}"
          --skip-local-2fa
          --group-claim-name ""
          --admin-group ""
      become: true
      become_user: "{{ gitea_user }}"
      when:
        - gitea_oauth_enabled | default(false)
        - gitea_oauth_name not in gitea_auth_list.stdout
      notify: restart gitea

    - name: Update Casdoor OAuth2 authentication source
      ansible.builtin.command:
        cmd: >
          /usr/local/bin/gitea admin auth update-oauth
          --config {{ gitea_config_file }}
          --id {{ gitea_auth_list.stdout_lines | select('search', gitea_oauth_name) | first | regex_search('^\d+') }}
          --name "{{ gitea_oauth_name }}"
          --provider openidConnect
          --key "{{ gitea_oauth_client_id }}"
          --secret "{{ gitea_oauth_client_secret }}"
          --auto-discover-url "https://id.ouranos.helu.ca/.well-known/openid-configuration"
          --scopes "{{ gitea_oauth_scopes }}"
          --skip-local-2fa
      become: true
      become_user: "{{ gitea_user }}"
      when:
        - gitea_oauth_enabled | default(false)
        - gitea_oauth_name in gitea_auth_list.stdout
      notify: restart gitea

  handlers:
    - name: restart gitea
      ansible.builtin.systemd:
        name: gitea
        state: restarted
        daemon_reload: true