name: Deploy

on:
  workflow_dispatch:
    inputs:
      image_tag:
        description: 'Docker image tag to deploy (e.g., v3.4.0, latest)'
        required: true
        default: 'latest'
      environment:
        description: 'Target environment'
        required: true
        type: choice
        options:
          - production
          - staging
        default: 'production'
  workflow_call:
    inputs:
      image_tag:
        description: 'Docker image tag to deploy'
        type: string
        default: 'latest'
      environment:
        description: 'Target environment'
        type: string
        default: 'staging'
      sha:
        description: 'Git commit SHA to deploy'
        required: true
        type: string

concurrency:
  group: deploy-${{ inputs.environment }}
  cancel-in-progress: false

permissions:
  contents: read
  deployments: write

jobs:
  validate-inputs:
    name: Validate deployment inputs
    runs-on: ubuntu-latest
    steps:
      - name: Validate environment
        env:
          TARGET_ENV: ${{ inputs.environment }}
        run: |
          set -euo pipefail
          case "$TARGET_ENV" in
            production|staging) ;;
            *)
              echo "::error::Invalid environment '$TARGET_ENV'. Expected 'production' or 'staging'."
              exit 1
              ;;
          esac

  deploy:
    name: Deploy to ${{ inputs.environment }}
    needs: validate-inputs
    runs-on: ubuntu-latest
    
    environment:
      name: ${{ inputs.environment }}
      url: ${{ vars.DEPLOY_URL || (inputs.environment == 'production' && 'https://demo.opensourcepos.org' || 'https://dev.opensourcepos.org') }}
      deployment: false
    
    steps:
      - name: Create GitHub Deployment
        id: deployment
        env:
          GH_TOKEN: ${{ github.token }}
          IMAGE_TAG: ${{ inputs.image_tag }}
          TARGET_ENV: ${{ inputs.environment }}
          REF_SHA: ${{ inputs.sha || github.sha }}
        run: |
          set -euo pipefail
          
          DEPLOYMENT_ID=$(gh api "repos/${GITHUB_REPOSITORY}/deployments" \
            -X POST \
            -f ref="${REF_SHA}" \
            -f environment="${TARGET_ENV}" \
            -f description="Deploy image ${IMAGE_TAG}" \
            -F auto_merge=false \
            -F required_contexts[] \
            --jq '.id')
          
          if [ -z "$DEPLOYMENT_ID" ]; then
            echo "::error::Failed to create deployment"
            exit 1
          fi
          
          echo "deployment_id=$DEPLOYMENT_ID" >> "$GITHUB_OUTPUT"
          echo "Created deployment: $DEPLOYMENT_ID"
      
      - name: Set deployment status to in_progress
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          set -euo pipefail
          
          gh api "repos/${GITHUB_REPOSITORY}/deployments/${{ steps.deployment.outputs.deployment_id }}/statuses" \
            -X POST \
            -f state="in_progress" \
            -f description="Deployment in progress..." \
            -f log_url="${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/actions/runs/${GITHUB_RUN_ID}"
      
      - name: Trigger deployment webhook
        id: webhook
        env:
          DEPLOY_WEBHOOK_URL: ${{ secrets.DEPLOY_WEBHOOK_URL }}
          DEPLOY_WEBHOOK_SECRET: ${{ secrets.DEPLOY_WEBHOOK_SECRET }}
          DOCKER_REPO_NAME: ${{ secrets.DOCKER_REPO_NAME }}
          IMAGE_TAG: ${{ inputs.image_tag }}
          TARGET_ENV: ${{ inputs.environment }}
          REF_SHA: ${{ inputs.sha || github.sha }}
          DEPLOYMENT_ID: ${{ steps.deployment.outputs.deployment_id }}
        run: |
          set -euo pipefail
          
          if [ -z "$DEPLOY_WEBHOOK_URL" ]; then
            echo "::error::DEPLOY_WEBHOOK_URL secret is not configured"
            echo "Please add the DEPLOY_WEBHOOK_URL secret in your repository settings"
            echo "status=failure" >> "$GITHUB_OUTPUT"
            exit 1
          fi
          
          REPO_NAME="${DOCKER_REPO_NAME:-opensourcepos/opensourcepos}"
          REPO_NAMESPACE="${REPO_NAME%%/*}"
          REPO_SHORT_NAME="${REPO_NAME#*/}"
          PUSHED_AT=$(date +%s)
          
          PAYLOAD=$(jq -n \
            --arg callback_url "${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}/actions/runs/${GITHUB_RUN_ID}" \
            --argjson pushed_at "$PUSHED_AT" \
            --arg pusher "$GITHUB_ACTOR" \
            --arg tag "$IMAGE_TAG" \
            --arg repo_name "$REPO_NAME" \
            --arg name "$REPO_SHORT_NAME" \
            --arg namespace "$REPO_NAMESPACE" \
            --arg repo_url "https://hub.docker.com/r/${REPO_NAME}/" \
            --arg deployment_id "$DEPLOYMENT_ID" \
            --arg environment "$TARGET_ENV" \
            --arg repository "$GITHUB_REPOSITORY" \
            --arg sha "$REF_SHA" \
            --arg run_id "$GITHUB_RUN_ID" \
            --arg actor "$GITHUB_ACTOR" \
            '{
              callback_url: $callback_url,
              push_data: {pushed_at: $pushed_at, pusher: $pusher, tag: $tag},
              repository: {repo_name: $repo_name, name: $name, namespace: $namespace, repo_url: $repo_url, status: "Active"},
              github_deployment: {id: $deployment_id, environment: $environment, repository: $repository, sha: $sha, run_id: $run_id, actor: $actor}
            }')
          
          echo "Sending webhook..."
          echo "Image: ${IMAGE_TAG}"
          echo "Environment: ${TARGET_ENV}"
          
          HEADERS=(-H "Content-Type: application/json")
          
          if [ -n "$DEPLOY_WEBHOOK_SECRET" ]; then
            SIGNATURE=$(printf '%s' "$PAYLOAD" | openssl dgst -sha256 -hmac "$DEPLOY_WEBHOOK_SECRET" | sed 's/.*= //')
            HEADERS+=(-H "X-Hub-Signature-256: sha256=$SIGNATURE")
            echo "Using HMAC-SHA256 signature verification"
          else
            echo "::warning::DEPLOY_WEBHOOK_SECRET not set - webhook calls will not be signed"
            echo "For security, configure DEPLOY_WEBHOOK_SECRET in your repository settings"
          fi
          
          HTTP_CODE=$(curl -sS --connect-timeout 10 --max-time 120 \
            -o response.txt -w "%{http_code}" \
            -X POST \
            "${HEADERS[@]}" \
            -d "$PAYLOAD" \
            "$DEPLOY_WEBHOOK_URL") || HTTP_CODE="000"
          
          echo "Response code: $HTTP_CODE"
          if [ -s response.txt ]; then
            cat response.txt
          fi
          
          if [ "$HTTP_CODE" -ge 200 ] && [ "$HTTP_CODE" -lt 300 ]; then
            echo "status=success" >> "$GITHUB_OUTPUT"
          else
            echo "status=failure" >> "$GITHUB_OUTPUT"
          fi
      
      - name: Set deployment status
        if: always()
        env:
          GH_TOKEN: ${{ github.token }}
          IMAGE_TAG: ${{ inputs.image_tag }}
          TARGET_ENV: ${{ inputs.environment }}
        run: |
          set -euo pipefail
          
          STATE="${{ steps.webhook.outputs.status }}"
          
          if [ "$STATE" = "success" ]; then
            DESCRIPTION=$(jq -nr --arg tag "$IMAGE_TAG" --arg env "$TARGET_ENV" \
              '"Deployed image \($tag) to \($env)"')
            
            gh api "repos/${GITHUB_REPOSITORY}/deployments/${{ steps.deployment.outputs.deployment_id }}/statuses" \
              -X POST \
              -f state="success" \
              -f description="$DESCRIPTION"
          else
            gh api "repos/${GITHUB_REPOSITORY}/deployments/${{ steps.deployment.outputs.deployment_id }}/statuses" \
              -X POST \
              -f state="failure" \
              -f description="Deployment failed"
            exit 1
          fi