name: "Update GitOps image tag"
description: "Checkout a GitOps repo, update image tag in a YAML file, commit and push"
author: "lucasdpt"

inputs:
  gitops-repo:
    description: "Nom du repo GitOps (ex: lucasdpt/infra-gitops)"
    required: true
  git-token:
    description: "Token avec droits de push sur le repo GitOps"
    required: true
  server-url:
    description: "URL du serveur Gitea/GitHub"
    required: false
    default: "https://github.com"
  gitops-path:
    description: "Chemin de checkout du repo GitOps"
    required: false
    default: "gitops"
  file:
    description: "Chemin du fichier YAML à mettre à jour (dans le repo GitOps)"
    required: true
  new-tag:
    description: "Nouveau tag d'image à appliquer"
    required: true
  mode:
    description: >-
      Mode de mise à jour: 'image' (juste l'image) ou 'helm' (image + spec.source.targetRevision)
    required: false
    default: "image"
  valuesKey:
    description: >-
      Clé contenant les valeurs Helm: 'values' (string YAML) ou 'valuesObject' (objet)
    required: false
    default: "valuesObject"
  branch:
    description: "Branche à push (ex: master/main)"
    required: false
    default: "master"
  git-user-name:
    description: "Nom de l'utilisateur git pour le commit"
    required: false
    default: "github-actions[bot]"
  git-user-email:
    description: "Email de l'utilisateur git pour le commit"
    required: false
    default: "github-actions[bot]@users.noreply.github.com"

runs:
  using: "composite"
  steps:
    - name: Checkout GitOps repo
      uses: actions/checkout@v5
      with:
        repository: ${{ inputs.gitops-repo }}
        token: ${{ inputs.git-token }}
        path: ${{ inputs.gitops-path }}
        github-server-url: ${{ inputs.server-url }}

    - name: Install yq
      shell: bash
      run: |
        set -euo pipefail
        YQ_VERSION=v4.34.1
        wget "https://github.com/mikefarah/yq/releases/download/${YQ_VERSION}/yq_linux_amd64" -O /usr/local/bin/yq
        chmod +x /usr/local/bin/yq

    - name: Update YAML file
      shell: bash
      env:
        NEW_TAG: ${{ inputs.new-tag }}
        MODE: ${{ inputs.mode }}
        VALUES_KEY: ${{ inputs.valuesKey }}
        FILE_REL: ${{ inputs.file }}
        GITOPS_PATH: ${{ inputs.gitops-path }}
      run: |
        set -euo pipefail
        cd "$GITOPS_PATH"

        echo "Updating $FILE_REL with tag=$NEW_TAG (mode=$MODE, valuesKey=$VALUES_KEY)"

        # --- Mise à jour de l'image (.spec.source.helm.values[Object].image.tag) ---
        if [ "$VALUES_KEY" = "values" ]; then
          echo "Using .spec.source.helm.values (string YAML)"
          /usr/local/bin/yq -i '
            .spec.source.helm.values |= (
              from_yaml
              | .image.tag = env(NEW_TAG)
              | to_yaml(style="literal")
            )
          ' "$FILE_REL"
        elif [ "$VALUES_KEY" = "valuesObject" ]; then
          echo "Using .spec.source.helm.valuesObject (YAML object)"
          /usr/local/bin/yq -i '
            .spec.source.helm.valuesObject.image.tag = env(NEW_TAG)
          ' "$FILE_REL"
        else
          echo "Unknown valuesKey: $VALUES_KEY (expected: values or valuesObject)"
          exit 1
        fi

        # --- Si mode = helm, on met aussi à jour spec.source.targetRevision ---
        if [ "$MODE" = "helm" ]; then
          echo "Also updating .spec.source.targetRevision"
          /usr/local/bin/yq -i '
            .spec.source.targetRevision = env(NEW_TAG)
          ' "$FILE_REL"
        fi

        echo "Resulting file:"
        cat "$FILE_REL"

    - name: Commit and push changes
      shell: bash
      env:
        BRANCH: ${{ inputs.branch }}
        GIT_USER_NAME: ${{ inputs.git-user-name }}
        GIT_USER_EMAIL: ${{ inputs.git-user-email }}
        FILE_REL: ${{ inputs.file }}
        GITOPS_PATH: ${{ inputs.gitops-path }}
        NEW_TAG: ${{ inputs.new-tag }}
      run: |
        set -euo pipefail
        cd "$GITOPS_PATH"

        git config --global user.name "$GIT_USER_NAME"
        git config --global user.email "$GIT_USER_EMAIL"

        git add "$FILE_REL"

        if git diff --cached --quiet; then
          echo "No changes to commit."
          exit 0
        fi

        git commit -m "feat: update image tag to $NEW_TAG"
        git push origin "HEAD:${BRANCH}"