---
# Usage: ansible-playbook -i 'root@<droplet-ip>,' deploy/ansible/deploy.yml
# Pre: droplet cloud-init complete (.bootstrap-complete marker present)

- name: Deploy aibook-fun app layer
  hosts: all
  gather_facts: false
  become: true
  vars:
    app_dir: /opt/aibook_fun
    repo_dir: /opt/aibook_fun/repo
    repo_url: "https://git.weown.tools/WeOwnAI/aibook-fun.git"
    repo_branch: main
    image_tag: "aibook-fun-marketing:v1"

  pre_tasks:
    - name: Verify droplet has completed cloud-init bootstrap
      ansible.builtin.stat:
        path: "{{ app_dir }}/.bootstrap-complete"
      register: bootstrap_marker

    - name: Fail clearly if bootstrap is not complete
      ansible.builtin.fail:
        msg: >-
          {{ app_dir }}/.bootstrap-complete is missing — droplet has not
          finished cloud-init. Wait a few minutes after `tofu apply` and retry.
          Check /var/log/cloud-init-output.log on the droplet.
      when: not bootstrap_marker.stat.exists

    - name: Ensure app dir exists
      ansible.builtin.file:
        path: "{{ app_dir }}"
        state: directory
        owner: root
        group: root
        mode: "0755"

  tasks:
    # ─── Clone / update repo on droplet ────────────────────────────────────
    - name: Clone (or update) aibook-fun repo on droplet
      ansible.builtin.git:
        repo: "{{ repo_url }}"
        dest: "{{ repo_dir }}"
        version: "{{ repo_branch }}"
        force: true
      register: git_clone
      notify: Rebuild image

    # ─── Upload Dockerfile (deploy/ scaffold not yet pushed to git.weown.tools) ─
    - name: Upload Dockerfile to droplet
      ansible.builtin.copy:
        src: ../docker/Dockerfile
        dest: "{{ app_dir }}/Dockerfile"
        owner: root
        group: root
        mode: "0644"

    # ─── Build docker image locally on droplet (unconditional — docker layer cache handles no-ops) ─
    - name: Build Next.js docker image locally
      ansible.builtin.shell: |
        set -euo pipefail
        docker build -t {{ image_tag }} -f {{ app_dir }}/Dockerfile {{ repo_dir }}/marketing-site/
      args:
        executable: /bin/bash
      register: image_build
      changed_when: "'writing image' in image_build.stderr"
      notify: Reconcile docker compose stack

    # ─── Upload compose + Caddyfile ────────────────────────────────────────
    - name: Upload compose.yaml
      ansible.builtin.copy:
        src: ../docker/compose.prod.yaml
        dest: "{{ app_dir }}/compose.yaml"
        owner: root
        group: root
        mode: "0644"
      notify: Reconcile docker compose stack

    - name: Upload Caddyfile
      ansible.builtin.copy:
        src: ../docker/Caddyfile
        dest: "{{ app_dir }}/Caddyfile"
        owner: root
        group: root
        mode: "0644"
      notify: Reconcile docker compose stack

    - name: Ensure caddy log dir is writable
      ansible.builtin.file:
        path: /var/log/caddy
        state: directory
        owner: root
        group: root
        mode: "0777"

    - name: Ensure Caddy Docker volumes are writable (caddy runs as UID 1000)
      ansible.builtin.shell: |
        set -euo pipefail
        for suffix in caddy_data caddy_config; do
          path="/var/lib/docker/volumes/aibook_fun_${suffix}/_data"
          if [ -d "$path" ]; then
            chown -R 1000:1000 "$path"
          fi
        done
      args:
        executable: /bin/bash
      changed_when: false

    # ─── Ensure compose stack is running (idempotent) ──────────────────────
    - name: Ensure compose stack is running (idempotent — `up -d` no-op if unchanged)
      ansible.builtin.shell: |
        set -euo pipefail
        cd {{ app_dir }}
        docker compose up -d --remove-orphans
      args:
        executable: /bin/bash
      register: compose_up
      changed_when: "'Started' in compose_up.stderr or 'Created' in compose_up.stderr or 'Recreated' in compose_up.stderr"

    - name: Wait for web app to respond
      ansible.builtin.uri:
        url: http://127.0.0.1:3000/
        status_code: [200]
      register: health_probe
      retries: 20
      delay: 5
      until: health_probe.status == 200

    - name: Report success
      ansible.builtin.debug:
        msg: "aibook-fun app layer deployed. URL: https://aibook.fun"

  handlers:
    - name: Rebuild image
      ansible.builtin.shell: |
        set -euo pipefail
        cd {{ repo_dir }}
        docker build -t {{ image_tag }} -f {{ repo_dir }}/deploy/docker/Dockerfile {{ repo_dir }}/marketing-site/
      args:
        executable: /bin/bash
      changed_when: false

    - name: Reconcile docker compose stack
      ansible.builtin.shell: |
        set -euo pipefail
        cd {{ app_dir }}
        docker compose up -d --force-recreate --remove-orphans
      args:
        executable: /bin/bash
      changed_when: false