#!/bin/bash

# Webhook Receiver for Basil Deployments
# This script sets up a simple webhook endpoint that triggers deployments

set -e

# Configuration
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PORT="${WEBHOOK_PORT:-9000}"
SECRET="${WEBHOOK_SECRET:-changeme}"
LOG_FILE="$SCRIPT_DIR/../webhook.log"

# Colors
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

log() {
    echo -e "${GREEN}[$(date +'%Y-%m-%d %H:%M:%S')]${NC} $1" | tee -a "$LOG_FILE"
}

warning() {
    echo -e "${YELLOW}[$(date +'%Y-%m-%d %H:%M:%S')] WARNING:${NC} $1" | tee -a "$LOG_FILE"
}

# Install webhook if not present
install_webhook() {
    if ! command -v webhook &> /dev/null; then
        log "Installing webhook..."
        if command -v apt-get &> /dev/null; then
            sudo apt-get update && sudo apt-get install -y webhook
        elif command -v yum &> /dev/null; then
            sudo yum install -y webhook
        else
            warning "Please install 'webhook' manually: https://github.com/adnanh/webhook"
            exit 1
        fi
    fi
}

# Create webhook configuration
create_webhook_config() {
    cat > "$SCRIPT_DIR/webhook-config.json" <<EOF
[
  {
    "id": "basil-deploy",
    "execute-command": "$SCRIPT_DIR/deploy.sh",
    "command-working-directory": "$SCRIPT_DIR/..",
    "response-message": "Deployment triggered successfully",
    "trigger-rule": {
      "and": [
        {
          "match": {
            "type": "value",
            "value": "$SECRET",
            "parameter": {
              "source": "header",
              "name": "X-Webhook-Secret"
            }
          }
        }
      ]
    },
    "pass-environment-to-command": [
      {
        "envname": "DOCKER_USERNAME",
        "source": "string",
        "name": "DOCKER_USERNAME"
      },
      {
        "envname": "DOCKER_REGISTRY",
        "source": "string",
        "name": "DOCKER_REGISTRY"
      },
      {
        "envname": "IMAGE_TAG",
        "source": "string",
        "name": "IMAGE_TAG"
      }
    ],
    "trigger-rule-mismatch-http-response-code": 403
  }
]
EOF
    log "Webhook configuration created at $SCRIPT_DIR/webhook-config.json"
}

# Start webhook server
start_webhook() {
    log "Starting webhook server on port $PORT..."
    log "Webhook URL: http://localhost:$PORT/hooks/basil-deploy"
    log "Secret: $SECRET"
    log "Press Ctrl+C to stop"

    webhook -hooks "$SCRIPT_DIR/webhook-config.json" -port "$PORT" -verbose
}

# Main
main() {
    install_webhook
    create_webhook_config
    start_webhook
}

main "$@"