---
# =============================================================================
# Gitea PoC Deployment Playbook (Standalone)
# =============================================================================
# Deploys standalone Gitea without external OAuth.
# Used for hosting Terraform/Pulumi repos and CI/CD pipelines.
#
# Prerequisites:
#   1. DNS record: gitea-poc.networkmonitor.cc -> VPS IP
#
# Usage:
#   ansible-playbook -i poc-inventory.yml playbook.yml
# =============================================================================

- name: Deploy Gitea Code Hosting
  hosts: gitea_servers
  become: true
  vars_files:
    - group_vars/gitea_servers.yml

  pre_tasks:
    - name: Validate required variables
      ansible.builtin.assert:
        that:
          - gitea_domain is defined
        fail_msg: "gitea_domain must be defined in group_vars/gitea_servers.yml"

  tasks:
    # =========================================================================
    # Prerequisites
    # =========================================================================
    - name: Update apt cache
      ansible.builtin.apt:
        update_cache: true
        cache_valid_time: 3600

    - name: Install prerequisites
      ansible.builtin.apt:
        name:
          - apt-transport-https
          - ca-certificates
          - curl
          - gnupg
          - lsb-release
          - jq
        state: present

    # =========================================================================
    # Docker Installation
    # =========================================================================
    - name: Create keyrings directory
      ansible.builtin.file:
        path: /etc/apt/keyrings
        state: directory
        mode: "0755"

    - name: Add Docker GPG key
      ansible.builtin.shell: |
        curl -fsSL https://download.docker.com/linux/ubuntu/gpg | gpg --dearmor -o /etc/apt/keyrings/docker.gpg
        chmod a+r /etc/apt/keyrings/docker.gpg
      args:
        creates: /etc/apt/keyrings/docker.gpg

    - name: Add Docker repository
      ansible.builtin.apt_repository:
        repo: "deb [arch=amd64 signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu {{ ansible_distribution_release }} stable"
        state: present
        filename: docker

    - name: Install Docker packages
      ansible.builtin.apt:
        name:
          - docker-ce
          - docker-ce-cli
          - containerd.io
          - docker-buildx-plugin
          - docker-compose-plugin
        state: present
        update_cache: true

    - name: Start and enable Docker
      ansible.builtin.systemd:
        name: docker
        state: started
        enabled: true

    # =========================================================================
    # Gitea Directory Structure
    # =========================================================================
    - name: Create Gitea directory
      ansible.builtin.file:
        path: "{{ gitea_base_dir }}"
        state: directory
        mode: "0755"

    - name: Create Gitea data directory
      ansible.builtin.file:
        path: "{{ gitea_data_dir }}"
        state: directory
        mode: "0755"

    # =========================================================================
    # Deploy Configuration Files
    # =========================================================================
    - name: Deploy docker-compose.yml
      ansible.builtin.template:
        src: templates/docker-compose.yml.j2
        dest: "{{ gitea_base_dir }}/docker-compose.yml"
        mode: "0644"

    - name: Deploy Caddyfile
      ansible.builtin.template:
        src: templates/Caddyfile.j2
        dest: "{{ gitea_base_dir }}/Caddyfile"
        mode: "0644"

    # =========================================================================
    # Firewall (UFW)
    # =========================================================================
    - name: Install UFW
      ansible.builtin.apt:
        name: ufw
        state: present

    - name: Allow SSH
      community.general.ufw:
        rule: allow
        port: "22"
        proto: tcp

    - name: Allow HTTP
      community.general.ufw:
        rule: allow
        port: "80"
        proto: tcp

    - name: Allow HTTPS
      community.general.ufw:
        rule: allow
        port: "443"
        proto: tcp

    - name: Allow Gitea SSH
      community.general.ufw:
        rule: allow
        port: "{{ gitea_ssh_port }}"
        proto: tcp

    - name: Enable UFW
      community.general.ufw:
        state: enabled
        policy: deny

    # =========================================================================
    # Start Services
    # =========================================================================
    - name: Pull Docker images
      ansible.builtin.command:
        cmd: docker compose pull
        chdir: "{{ gitea_base_dir }}"
      changed_when: true

    - name: Start Gitea services
      ansible.builtin.command:
        cmd: docker compose up -d
        chdir: "{{ gitea_base_dir }}"
      changed_when: true

    # =========================================================================
    # Wait for Gitea to be ready
    # =========================================================================
    - name: Wait for Gitea container to be healthy
      ansible.builtin.command:
        cmd: docker compose ps gitea --format json
        chdir: "{{ gitea_base_dir }}"
      register: gitea_container
      until: "'running' in gitea_container.stdout"
      retries: 12
      delay: 5
      changed_when: false

    # =========================================================================
    # Deployment Summary
    # =========================================================================
    - name: Display deployment status
      ansible.builtin.debug:
        msg: |
          ============================================
          Gitea Container Deployed!
          ============================================

          Container: gitea (port {{ gitea_http_port }} internal)
          SSH: port {{ gitea_ssh_port }} exposed

          ============================================
          NEXT STEPS:
          ============================================

          1. Deploy shared Caddy:
             cd ../caddy && ansible-playbook -i poc-inventory.yml playbook.yml

          2. Then access https://{{ gitea_domain }}

          ============================================

          View logs:
            ssh root@{{ ansible_host }} "cd {{ gitea_base_dir }} && docker compose logs -f"

          ============================================