name: Deploy Lambda (Terraform)

on:
  workflow_call:
    inputs:
      lambda_name:
        required: true
        type: string

      lambda_path:
        required: true
        type: string

      stage:
        required: true
        type: string

      ecr_repo:
        required: true
        type: string

      image_digest:
        required: true
        type: string

      environment_vars:
        required: false
        type: string

    secrets:
      AWS_ACCESS_KEY_ID:
        required: true
      AWS_SECRET_ACCESS_KEY:
        required: true
      AWS_REGION:
        required: true

jobs:
  deploy:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4

      - name: Debug inputs
        run: |
          echo "lambda_name=${{ inputs.lambda_name }}"
          echo "lambda_path=${{ inputs.lambda_path }}"
          echo "stage=${{ inputs.stage }}"
          echo "ecr_repo_url=${{ inputs.ecr_repo_url }}"
          echo "image_digest=${{ inputs.image_digest }}"


      - uses: aws-actions/configure-aws-credentials@v4
        with:
          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
          aws-region: ${{ secrets.AWS_REGION }}

      - uses: hashicorp/setup-terraform@v3

      - uses: aws-actions/amazon-ecr-login@v2

      - name: Resolve ECR repo URL
        id: repo
        env:
          AWS_REGION: ${{ secrets.AWS_REGION }}
        run: |
          AWS_ACCOUNT_ID=$(aws sts get-caller-identity --query Account --output text)
          ECR_REPO_URL="${AWS_ACCOUNT_ID}.dkr.ecr.${AWS_REGION}.amazonaws.com/${{ inputs.ecr_repo }}"
          echo "ecr_repo_url=$ECR_REPO_URL" >> "$GITHUB_OUTPUT"

      - name: Terraform Init
        working-directory: ${{ inputs.lambda_path }}
        run: terraform init -reconfigure

      - name: Terraform Workspace
        working-directory: ${{ inputs.lambda_path }}
        run: |
          terraform workspace select ${{ inputs.stage }} \
            || terraform workspace new ${{ inputs.stage }}

      - name: Terraform Plan
        working-directory: ${{ inputs.lambda_path }}
        run: |
          ENV_VARS=""
          if [ -n "${{ inputs.environment_vars }}" ]; then
            # Convert multiline "KEY=VALUE" into HCL map format
            ENV_VARS="{ $(echo "${{ inputs.environment_vars }}" | awk -F= '{gsub(/"/,"\\\""); printf "%s=\"%s\",",$1,$2}' | sed 's/,$//') }"
          fi

          PLAN_CMD="terraform plan \
            -var=\"stage=${{ inputs.stage }}\" \
            -var=\"lambda_name=${{ inputs.lambda_name }}\" \
            -var=\"ecr_repo_url=${{ steps.repo.outputs.ecr_repo_url }}\" \
            -var=\"image_digest=${{ inputs.image_digest }}\""

          if [ -n "$ENV_VARS" ]; then
            PLAN_CMD="$PLAN_CMD -var=\"environment_vars=$ENV_VARS\""
          fi

          PLAN_CMD="$PLAN_CMD -out=lambdaplan"
          # echo "Running: $PLAN_CMD"
          eval $PLAN_CMD

      - name: Terraform Apply
        working-directory: ${{ inputs.lambda_path }}
        run: terraform apply -auto-approve lambdaplan