---
- name: Check diff patch presense
  ansible.builtin.stat:
    path: "{{ apply_doc_patch_diff_patch_file }}"
  register: "diff_patch_stat"

- name: Check git patch presense
  ansible.builtin.stat:
    path: "{{ apply_doc_patch_git_patch_file }}"
  register: "git_patch_stat"

- name: Clone {{ apply_doc_patch_repository }} Repository
  # no_log: true
  command: "git clone https://x-access-token:{{ github_token }}@github.com/{{ apply_doc_patch_repository }} {{ doc_label }}"
  args:
    chdir: "{{ ansible_user_dir }}"
  when: "git_patch_stat.stat.exists or diff_patch_stat.stat.exists"

- name: Try to apply git patch
  command: "git apply --reject --ignore-space-change {{ apply_doc_patch_git_patch_file }}"
  args:
    chdir: "{{ ansible_user_dir }}/{{ doc_label }}"
  ignore_errors: true
  when: "git_patch_stat.stat.exists"

# - name: Try to apply diff patch
#   command: "patch -p1 -N -f -i {{ apply_doc_patch_patch_file }}"
#   args:
#     chdir: "{{ ansible_user_dir }}/{{ doc_label }}/{{ apply_doc_patch_target_location }}"
#   ignore_errors: true
#   when: "diff_patch_stat.stat.exists"

- name: Find patch backup and reject files
  find:
    paths: "{{ ansible_user_dir }}/{{ doc_label }}/{{ apply_doc_patch_target_location }}"
    patterns: "^.*?\\.(?:rej)$"
    use_regex: true
    recurse: true
  register: rej_files
  when: "git_patch_stat.stat.exists or diff_patch_stat.stat.exists"

- name: Prepare patch remainder comment file
  template:
    dest: "{{ apply_doc_patch_reject_file}}"
    src: "patch_remainder_comment.txt.j2"
  when:
    - "git_patch_stat.stat.exists or diff_patch_stat.stat.exists"
    - "rej_files.matched > 0"

- name: Construct patch remainder
  shell: "cat {{ item.path }} >> {{ apply_doc_patch_reject_file}}"
  loop: "{{ rej_files.files }}"
  when:
    - "git_patch_stat.stat.exists or diff_patch_stat.stat.exists"
    - "rej_files.matched > 0"

- name: Finish patch remainder comment file
  shell: "echo '```' >> {{ apply_doc_patch_reject_file}}"
  when:
    - "git_patch_stat.stat.exists or diff_patch_stat.stat.exists"
    - "rej_files.matched > 0"

- name: Drop all interim patch files
  command: "find . \\( -name '*.rst.orig' -or -name '*.rst.rej' \\) -exec rm {} \\;"
  args:
    chdir: "{{ ansible_user_dir }}/{{ doc_label }}/{{ apply_doc_patch_target_location }}"
  register: drop_failed
  when:
    - "git_patch_stat.stat.exists or diff_patch_stat.stat.exists"
    - "rej_files.matched > 0"

- name: Perform git diff to see changes
  command: "git diff"
  register: diff_output
  args:
    chdir: "{{ ansible_user_dir }}/{{ doc_label }}/{{ apply_doc_patch_target_location }}"
  when: "git_patch_stat.stat.exists or diff_patch_stat.stat.exists"

- name: Checkout branch
  command: "git checkout -b {{ apply_doc_patch_branch_name }}"
  args:
    chdir: "{{ ansible_user_dir }}/{{ doc_label }}"
  when:
    - "git_patch_stat.stat.exists or diff_patch_stat.stat.exists"
    - "diff_output.stdout != ''"

- name: Stage files
  command: "git add ."
  args:
    chdir: "{{ ansible_user_dir }}/{{ doc_label }}"
  when:
    - "git_patch_stat.stat.exists or diff_patch_stat.stat.exists"
    - "diff_output.stdout != ''"

# Maybe put some reference in the commit message
- name: Commit files
  command: "git commit -m 'Update content'"
  args:
    chdir: "{{ ansible_user_dir }}/{{ doc_label }}"
  when:
    - "git_patch_stat.stat.exists or diff_patch_stat.stat.exists"
    - "diff_output.stdout != ''"

- name: Push changes
  command: "git push -u origin {{ apply_doc_patch_branch_name }} --force"
  args:
    chdir: "{{ ansible_user_dir }}/{{ doc_label }}"
  when:
    - "git_patch_stat.stat.exists or diff_patch_stat.stat.exists"
    - "diff_output.stdout != ''"

# Gists are not available by GitHub App, do not try it now
# - name: Create patch gist
#   command: "{{ apply_doc_patch_gh }} gist create {{ apply_doc_patch_patch_file }} -d '{{ doc_label }} patch file for opentelekomcloud-docs/doc-exports#{{ zuul.change }}'"
#   register: gh_gist
#   args:
#     chdir: "{{ ansible_user_dir }}/{{ doc_label }}"
#   when:
#     - "patch_stat.stat.exists"
#     - "diff_output.stdout != ''"

- name: Generate PR text
  template:
    dest: "{{ apply_doc_patch_pr_body_file }}"
    src: "pr_body.txt.j2"
  when:
    - "git_patch_stat.stat.exists or diff_patch_stat.stat.exists"
    - "diff_output.stdout != ''"

- name: Search existing Pull Request
  command: "{{ apply_doc_patch_gh }} pr list --search 'head:{{ apply_doc_patch_branch_name }}' --json id"
  args:
    chdir: "{{ ansible_user_dir }}/{{ doc_label }}"
  register: "existing_pr"
  when:
    - "git_patch_stat.stat.exists or diff_patch_stat.stat.exists"
    - "diff_output.stdout != ''"

- name: Open Pull Request
  command: "{{ apply_doc_patch_gh }} pr create -B main -F {{ apply_doc_patch_pr_body_file }} -t '{{ apply_doc_patch_pr_title }}' -l {{ apply_doc_patch_pr_label }}"
  args:
    chdir: "{{ ansible_user_dir }}/{{ doc_label }}"
  when:
    - "git_patch_stat.stat.exists or diff_patch_stat.stat.exists"
    - "diff_output.stdout != ''"
    - "existing_pr.stdout == '[]'"

- name: Post info about apply failures
  command: "{{ apply_doc_patch_gh }} pr comment -F {{ apply_doc_patch_reject_file }}"
  args:
    chdir: "{{ ansible_user_dir }}/{{ doc_label }}"
  when:
    - "git_patch_stat.stat.exists or diff_patch_stat.stat.exists"
    - "diff_output.stdout != ''"
    - "rej_files.matched > 0"