---
# Rsync-based Deployment Playbook with Releases/Symlink Pattern
# Implements production-ready deployment with zero-downtime and rollback support
# No GitHub dependency - deploys directly from local machine
#
# Usage:
#   ansible-playbook -i inventories/production/hosts.yml playbooks/deploy-rsync-based.yml
#   ansible-playbook -i inventories/production/hosts.yml playbooks/deploy-rsync-based.yml --extra-vars "release_tag=v1.0.0"

- name: Deploy Custom PHP Framework (Rsync-based with Releases)
  hosts: web_servers
  become: true

  vars:
    # Application configuration
    app_name: michaelschiemer
    app_user: deploy
    app_group: deploy

    # Deployment paths
    app_base_path: "/home/{{ app_user }}/{{ app_name }}"
    releases_path: "{{ app_base_path }}/releases"
    shared_path: "{{ app_base_path }}/shared"
    current_path: "{{ app_base_path }}/current"

    # Local source directory (project root on your machine)
    local_project_path: "{{ playbook_dir }}/../../.."

    # Release configuration
    release_timestamp: "{{ ansible_date_time.epoch }}"
    # Note: effective_release_tag is set in pre_tasks based on Git tags
    release_name: "{{ effective_release_tag | default(release_tag | default(release_timestamp)) }}"
    release_path: "{{ releases_path }}/{{ release_name }}"

    # Deployment settings
    keep_releases: 5
    composer_install_flags: "--no-dev --optimize-autoloader --no-interaction"

    # Shared directories and files
    # Shared directories that need symlinks
    # NOTE: storage/logs, storage/cache, storage/uploads are handled by Docker volumes
    shared_dirs:
      - storage/sessions
      - public/uploads

    shared_files:
      - .env.production

    # Rsync exclusions
    rsync_excludes:
      - .git/
      - .github/
      - node_modules/
      - .env
      - .env.local
      - .env.development
      - storage/
      - public/uploads/
      - tests/
      - .idea/
      - .vscode/
      - "*.log"
      - .DS_Store
      - deployment/
      - database.sqlite
      - "*.cache"
      - .php-cs-fixer.cache
      - var/cache/
      - var/logs/
      - "*.php85/"
      - src/**/*.php85/

  pre_tasks:
    # Git Tag Detection and Validation
    - name: Get current Git tag (if release_tag not specified)
      local_action:
        module: command
        cmd: git describe --tags --exact-match
        chdir: "{{ local_project_path }}"
      register: git_current_tag
      become: false
      ignore_errors: yes
      when: release_tag is not defined

    - name: Get current Git commit hash
      local_action:
        module: command
        cmd: git rev-parse --short HEAD
        chdir: "{{ local_project_path }}"
      register: git_commit_hash
      become: false

    - name: Set release_name from Git tag or timestamp
      set_fact:
        effective_release_tag: "{{ release_tag | default(git_current_tag.stdout if (git_current_tag is defined and git_current_tag.rc == 0) else release_timestamp) }}"
        git_hash: "{{ git_commit_hash.stdout }}"

    - name: Display deployment information
      debug:
        msg:
          - "=========================================="
          - "Deployment Information"
          - "=========================================="
          - "Release: {{ effective_release_tag }}"
          - "Git Hash: {{ git_hash }}"
          - "Source: {{ local_project_path }}"
          - "Target: {{ ansible_host }}"
          - "=========================================="

    - name: Install Composer dependencies locally before deployment
      local_action:
        module: command
        cmd: composer install {{ composer_install_flags }}
        chdir: "{{ local_project_path }}"
      become: false

    - name: Build NPM assets locally before deployment
      local_action:
        module: command
        cmd: npm run build
        chdir: "{{ local_project_path }}"
      become: false
    - name: Check if deployment lock exists
      stat:
        path: "{{ app_base_path }}/.deploy.lock"
      register: deploy_lock

    - name: Remove stale deployment lock if force flag is set
      file:
        path: "{{ app_base_path }}/.deploy.lock"
        state: absent
      when: deploy_lock.stat.exists and (force_deploy | default(false))

    - name: Fail if deployment is already in progress (without force)
      fail:
        msg: "Deployment already in progress. Lock file exists: {{ app_base_path }}/.deploy.lock. Use --extra-vars 'force_deploy=true' to override."
      when: deploy_lock.stat.exists and not (force_deploy | default(false))

    - name: Create deployment lock
      file:
        path: "{{ app_base_path }}/.deploy.lock"
        state: touch
        owner: "{{ app_user }}"
        group: "{{ app_group }}"
        mode: '0644'

    - name: Log deployment start
      lineinfile:
        path: "{{ app_base_path }}/deploy.log"
        line: "[{{ ansible_date_time.iso8601 }}] Deployment started - Release: {{ release_name }} - User: {{ ansible_user_id }}"
        create: yes
        owner: "{{ app_user }}"
        group: "{{ app_group }}"

  tasks:
    # ==========================================
    # 1. Directory Structure Setup
    # ==========================================

    - name: Create base application directory
      file:
        path: "{{ app_base_path }}"
        state: directory
        owner: "{{ app_user }}"
        group: "{{ app_group }}"
        mode: '0755'

    - name: Create releases directory
      file:
        path: "{{ releases_path }}"
        state: directory
        owner: "{{ app_user }}"
        group: "{{ app_group }}"
        mode: '0755'

    - name: Create shared directory
      file:
        path: "{{ shared_path }}"
        state: directory
        owner: "{{ app_user }}"
        group: "{{ app_group }}"
        mode: '0755'

    - name: Create shared subdirectories
      file:
        path: "{{ shared_path }}/{{ item }}"
        state: directory
        owner: "{{ app_user }}"
        group: "{{ app_group }}"
        mode: '0755'
      loop: "{{ shared_dirs }}"

    # ==========================================
    # 2. Rsync Application Code to New Release
    # ==========================================

    - name: Remove old release directory if exists (prevent permission issues)
      file:
        path: "{{ release_path }}"
        state: absent

    - name: Create new release directory
      file:
        path: "{{ release_path }}"
        state: directory
        owner: "{{ app_user }}"
        group: "{{ app_group }}"
        mode: '0755'

    - name: Temporarily rename .dockerignore to prevent rsync -F from reading it
      command: mv {{ local_project_path }}/.dockerignore {{ local_project_path }}/.dockerignore.bak
      delegate_to: localhost
      become: false
      ignore_errors: yes

    - name: Sync application code to new release via rsync (raw command to avoid -F flag)
      command: >
        rsync --delay-updates --compress --delete-after --archive --rsh='ssh -i {{ ansible_ssh_private_key_file }} -o StrictHostKeyChecking=no' --no-g --no-o
        {% for exclude in rsync_excludes %}--exclude='{{ exclude }}' {% endfor %}
        {{ local_project_path }}/ {{ app_user }}@{{ ansible_host }}:{{ release_path }}/
      delegate_to: localhost
      become: false

    - name: Restore .dockerignore after rsync
      command: mv {{ local_project_path }}/.dockerignore.bak {{ local_project_path }}/.dockerignore
      delegate_to: localhost
      become: false
      ignore_errors: yes

    - name: Set correct ownership for release
      file:
        path: "{{ release_path }}"
        owner: "{{ app_user }}"
        group: "{{ app_group }}"
        recurse: yes

    - name: Get local git commit hash (if available)
      command: git rev-parse HEAD
      args:
        chdir: "{{ local_project_path }}"
      register: commit_hash
      delegate_to: localhost
      become: false
      changed_when: false
      failed_when: false

    - name: Log release and commit information
      lineinfile:
        path: "{{ app_base_path }}/deploy.log"
        line: "[{{ ansible_date_time.iso8601 }}] Release: {{ effective_release_tag }} | Git Hash: {{ git_hash | default('N/A') }} | Commit: {{ commit_hash.stdout | default('N/A') }}"
      when: commit_hash.rc == 0

    # ==========================================
    # 3. Shared Files/Directories Symlinks
    # ==========================================

    - name: Remove shared directories from release (they will be symlinked)
      file:
        path: "{{ release_path }}/{{ item }}"
        state: absent
      loop: "{{ shared_dirs }}"

    - name: Create parent directories for symlinks
      file:
        path: "{{ release_path }}/{{ item | dirname }}"
        state: directory
        owner: "{{ app_user }}"
        group: "{{ app_group }}"
        mode: '0755'
      loop: "{{ shared_dirs }}"
      # Skip if dirname is current directory ('.')
      when: (item | dirname) != '.'

    - name: Create symlinks for shared directories
      file:
        src: "{{ shared_path }}/{{ item }}"
        dest: "{{ release_path }}/{{ item }}"
        state: link
        owner: "{{ app_user }}"
        group: "{{ app_group }}"
        force: yes
      loop: "{{ shared_dirs }}"

    - name: Remove .env.production from release (will be symlinked)
      file:
        path: "{{ release_path }}/.env.production"
        state: absent

    - name: Create symlink for .env.production
      file:
        src: "{{ shared_path }}/.env.production"
        dest: "{{ release_path }}/.env.production"
        state: link
        owner: "{{ app_user }}"
        group: "{{ app_group }}"
        force: yes

    - name: Create .env symlink with relative path to shared .env.production for Docker container access
      file:
        src: "../../shared/.env.production"
        dest: "{{ release_path }}/.env"
        state: link
        owner: "{{ app_user }}"
        group: "{{ app_group }}"
        force: yes

    # ==========================================
    # 4. Dependencies Installation
    # ==========================================

    # Composer dependencies and NPM assets are already built locally and rsync'd
    # No need to run composer install or npm build on the server

    # ==========================================
    # 5. File Permissions
    # ==========================================

    - name: Make console script executable
      file:
        path: "{{ release_path }}/console.php"
        mode: '0755'
      ignore_errors: yes

    # ==========================================
    # 6. Database Migrations (Optional)
    # ==========================================

    - name: Run database migrations
      command: php console.php db:migrate --no-interaction
      args:
        chdir: "{{ release_path }}"
      become_user: "{{ app_user }}"
      when: run_migrations | default(false) | bool
      register: migrations_result

    - name: Log migration result
      lineinfile:
        path: "{{ app_base_path }}/deploy.log"
        line: "[{{ ansible_date_time.iso8601 }}] Migrations: {{ migrations_result.stdout | default('skipped') }}"
      when: run_migrations | default(false) | bool

    # ==========================================
    # 7. Prepare for Deployment
    # ==========================================

    - name: Get current release (before switch)
      stat:
        path: "{{ current_path }}"
      register: current_release_before

    - name: Stop existing Docker containers (if any)
      command: docker compose down
      args:
        chdir: "{{ current_path }}"
      become_user: "{{ app_user }}"
      when: current_release_before.stat.exists
      ignore_errors: yes

    # ==========================================
    # 8. Symlink Switch (Zero-Downtime)
    # ==========================================

    - name: Store previous release path for rollback
      set_fact:
        previous_release: "{{ current_release_before.stat.lnk_source | default('none') }}"

    - name: Switch current symlink to new release (atomic operation)
      file:
        src: "{{ release_path }}"
        dest: "{{ current_path }}"
        state: link
        owner: "{{ app_user }}"
        group: "{{ app_group }}"
        force: yes

    - name: Log symlink switch
      lineinfile:
        path: "{{ app_base_path }}/deploy.log"
        line: "[{{ ansible_date_time.iso8601 }}] Symlink switched: {{ current_path }} -> {{ release_path }}"

    # ==========================================
    # 8.5. SSL Certificate Setup
    # ==========================================

    - name: Create SSL directory in release
      file:
        path: "{{ release_path }}/ssl"
        state: directory
        owner: "{{ app_user }}"
        group: "{{ app_group }}"
        mode: '0755'

    - name: Copy SSL certificates from certbot to release (if they exist)
      shell: |
        if docker ps | grep -q certbot; then
          docker cp certbot:/etc/letsencrypt/archive/michaelschiemer.de/fullchain1.pem {{ release_path }}/ssl/fullchain.pem 2>/dev/null || true
          docker cp certbot:/etc/letsencrypt/archive/michaelschiemer.de/privkey1.pem {{ release_path }}/ssl/privkey.pem 2>/dev/null || true
          chown {{ app_user }}:{{ app_group }} {{ release_path }}/ssl/*.pem 2>/dev/null || true
        fi
      args:
        chdir: "{{ current_path }}"
      ignore_errors: yes

    # ==========================================
    # 9. Start Docker Containers
    # ==========================================

    - name: Start Docker containers with new release
      command: docker compose -f docker-compose.yml -f docker-compose.production.yml up -d --build
      args:
        chdir: "{{ current_path }}"
      become_user: "{{ app_user }}"

    - name: Wait for containers to be ready
      pause:
        seconds: 15

    # ==========================================
    # 10. Health Checks
    # ==========================================

    - name: Wait for application to be ready
      pause:
        seconds: 10

    - name: Health check - Nginx ping endpoint (HTTPS)
      uri:
        url: "https://{{ ansible_host }}/ping"
        method: GET
        return_content: yes
        status_code: 200
        validate_certs: no
        follow_redirects: none
      register: health_check
      retries: 3
      delay: 5
      until: health_check.status == 200
      ignore_errors: yes

    - name: Log health check result
      lineinfile:
        path: "{{ app_base_path }}/deploy.log"
        line: "[{{ ansible_date_time.iso8601 }}] Health check: {{ health_check.status | default('FAILED') }}"

    - name: Rollback on health check failure
      block:
        - name: Stop failed release containers
          command: docker compose down
          args:
            chdir: "{{ current_path }}"
          become_user: "{{ app_user }}"

        - name: Switch symlink back to previous release
          file:
            src: "{{ previous_release }}"
            dest: "{{ current_path }}"
            state: link
            force: yes
          when: previous_release != 'none'

        - name: Start previous release containers
          command: docker compose -f docker-compose.yml -f docker-compose.production.yml up -d
          args:
            chdir: "{{ current_path }}"
          become_user: "{{ app_user }}"
          when: previous_release != 'none'

        - name: Remove failed release
          file:
            path: "{{ release_path }}"
            state: absent

        - name: Log rollback
          lineinfile:
            path: "{{ app_base_path }}/deploy.log"
            line: "[{{ ansible_date_time.iso8601 }}] ROLLBACK: Health check failed, reverted to {{ previous_release }}"

        - name: Fail deployment
          fail:
            msg: "Deployment failed - health check returned {{ health_check.status }}. Rolled back to previous release."
      when: health_check.status != 200

    # ==========================================
    # 11. Cleanup Old Releases
    # ==========================================

    - name: Get list of all releases
      find:
        paths: "{{ releases_path }}"
        file_type: directory
      register: all_releases

    - name: Sort releases by creation time
      set_fact:
        sorted_releases: "{{ all_releases.files | sort(attribute='ctime', reverse=true) }}"

    - name: Remove old releases (keep last {{ keep_releases }})
      file:
        path: "{{ item.path }}"
        state: absent
      loop: "{{ sorted_releases[keep_releases:] }}"
      when: sorted_releases | length > keep_releases

    - name: Log cleanup
      lineinfile:
        path: "{{ app_base_path }}/deploy.log"
        line: "[{{ ansible_date_time.iso8601 }}] Cleanup: Kept {{ [sorted_releases | length, keep_releases] | min }} releases, removed {{ [sorted_releases | length - keep_releases, 0] | max }}"

  post_tasks:
    - name: Cleanup and logging
      block:
        - name: Remove deployment lock
          file:
            path: "{{ app_base_path }}/.deploy.lock"
            state: absent

        - name: Log deployment completion
          lineinfile:
            path: "{{ app_base_path }}/deploy.log"
            line: "[{{ ansible_date_time.iso8601 }}] Deployment completed successfully - Release: {{ release_name }}"

        - name: Display deployment summary
          debug:
            msg:
              - "=========================================="
              - "Deployment Summary"
              - "=========================================="
              - "Release: {{ release_name }}"
              - "Commit: {{ commit_hash.stdout | default('N/A') }}"
              - "Path: {{ release_path }}"
              - "Current: {{ current_path }}"
              - "Health Check: {{ health_check.status | default('N/A') }}"
              - "Previous Release: {{ previous_release }}"
              - "=========================================="

      rescue:
        - name: Remove deployment lock on failure
          file:
            path: "{{ app_base_path }}/.deploy.lock"
            state: absent

        - name: Log deployment failure
          lineinfile:
            path: "{{ app_base_path }}/deploy.log"
            line: "[{{ ansible_date_time.iso8601 }}] DEPLOYMENT FAILED - Release: {{ release_name }}"

        - name: Fail with error message
          fail:
            msg: "Deployment failed. Check {{ app_base_path }}/deploy.log for details."