#!/bin/bash

# put_test.sh - Test script for Ginxsom Blossom server upload functionality
# This script simulates a user uploading a blob to ginxsom using proper Blossom authentication

set -e  # Exit on any error

# Configuration
SERVER_URL="http://localhost:9001"
UPLOAD_ENDPOINT="${SERVER_URL}/upload"
TEST_FILE="test_blob_$(date +%s).txt"
CLEANUP_FILES=()

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# Cleanup function
cleanup() {
    echo -e "${YELLOW}Cleaning up temporary files...${NC}"
    for file in "${CLEANUP_FILES[@]}"; do
        if [[ -f "$file" ]]; then
            rm -f "$file"
            echo "Removed: $file"
        fi
    done
}

# Set up cleanup on exit
trap cleanup EXIT

# Helper functions
log_info() {
    echo -e "${BLUE}[INFO]${NC} $1"
}

log_success() {
    echo -e "${GREEN}[SUCCESS]${NC} $1"
}

log_error() {
    echo -e "${RED}[ERROR]${NC} $1"
}

log_warning() {
    echo -e "${YELLOW}[WARNING]${NC} $1"
}

# Check prerequisites
check_prerequisites() {
    log_info "Checking prerequisites..."
    
    # Check if nak is installed
    if ! command -v nak &> /dev/null; then
        log_error "nak command not found. Please install nak first."
        log_info "Install with: go install github.com/fiatjaf/nak@latest"
        exit 1
    fi
    log_success "nak is installed"
    
    # Check if curl is available
    if ! command -v curl &> /dev/null; then
        log_error "curl command not found. Please install curl."
        exit 1
    fi
    log_success "curl is available"
    
    # Check if sha256sum is available
    if ! command -v sha256sum &> /dev/null; then
        log_error "sha256sum command not found."
        exit 1
    fi
    log_success "sha256sum is available"
    
    # Check if base64 is available
    if ! command -v base64 &> /dev/null; then
        log_error "base64 command not found."
        exit 1
    fi
    log_success "base64 is available"
}

# Check if server is running
check_server() {
    log_info "Checking if server is running..."
    
    if curl -s -f "${SERVER_URL}/health" > /dev/null 2>&1; then
        log_success "Server is running at ${SERVER_URL}"
    else
        log_error "Server is not responding at ${SERVER_URL}"
        log_info "Please start the server with: ./scripts/start-fcgi.sh && nginx -p . -c config/local-nginx.conf"
        exit 1
    fi
}

# Create test file
create_test_file() {
    log_info "Creating test file: ${TEST_FILE}"
    
    # Create test content with timestamp and random data
    cat > "${TEST_FILE}" << EOF
Test blob content for Ginxsom Blossom server
Timestamp: $(date -Iseconds)
Random data: $(openssl rand -hex 32)
Test message: Hello from put_test.sh!

This file is used to test the upload functionality
of the Ginxsom Blossom server implementation.
EOF
    
    CLEANUP_FILES+=("${TEST_FILE}")
    log_success "Created test file with $(wc -c < "${TEST_FILE}") bytes"
}

# Calculate file hash
calculate_hash() {
    log_info "Calculating SHA-256 hash..."
    
    HASH=$(sha256sum "${TEST_FILE}" | cut -d' ' -f1)
    
    log_success "Data to hash: ${TEST_FILE}"
    log_success "File hash: ${HASH}"
}

# Generate nostr event
generate_nostr_event() {
    log_info "Generating kind 24242 nostr event with nak..."
    
    # Calculate expiration time (1 hour from now)
    EXPIRATION=$(date -d '+1 hour' +%s)
    
    # Generate the event using nak
    EVENT_JSON=$(nak event -k 24242 -c "" \
        -t "t=upload" \
        -t "x=${HASH}" \
        -t "expiration=${EXPIRATION}")
    
    if [[ -z "$EVENT_JSON" ]]; then
        log_error "Failed to generate nostr event"
        exit 1
    fi
    
    log_success "Generated nostr event"
    echo "Event JSON: $EVENT_JSON"
}

# Create authorization header
create_auth_header() {
    log_info "Creating authorization header..."
    
    # Base64 encode the event (without newlines)
    AUTH_B64=$(echo -n "$EVENT_JSON" | base64 -w 0)
    AUTH_HEADER="Nostr ${AUTH_B64}"
    
    log_success "Created authorization header"
    echo "Auth header length: ${#AUTH_HEADER} characters"
}

# Perform upload
perform_upload() {
    log_info "Performing upload to ${UPLOAD_ENDPOINT}..."
    
    # Create temporary file for response
    RESPONSE_FILE=$(mktemp)
    CLEANUP_FILES+=("${RESPONSE_FILE}")
    
    # Perform the upload with verbose output
    HTTP_STATUS=$(curl -s -w "%{http_code}" \
        -X PUT \
        -H "Authorization: ${AUTH_HEADER}" \
        -H "Content-Type: text/plain" \
        -H "Content-Disposition: attachment; filename=\"${TEST_FILE}\"" \
        --data-binary "@${TEST_FILE}" \
        "${UPLOAD_ENDPOINT}" \
        -o "${RESPONSE_FILE}")
    
    echo "HTTP Status: ${HTTP_STATUS}"
    echo "Response body:"
    cat "${RESPONSE_FILE}"
    echo
    
    # Check response
    case "${HTTP_STATUS}" in
        200)
            log_success "Upload successful!"
            ;;
        201)
            log_success "Upload successful (created)!"
            ;;
        400)
            log_error "Bad request - check the event format"
            ;;
        401)
            log_error "Unauthorized - authentication failed"
            ;;
        405)
            log_error "Method not allowed - check nginx configuration"
            ;;
        413)
            log_error "Payload too large"
            ;;
        501)
            log_warning "Upload endpoint not yet implemented (expected for now)"
            ;;
        *)
            log_error "Upload failed with HTTP status: ${HTTP_STATUS}"
            ;;
    esac
}

# Test file retrieval
test_retrieval() {
    log_info "Testing file retrieval..."
    
    RETRIEVAL_URL="${SERVER_URL}/${HASH}"
    
    if curl -s -f "${RETRIEVAL_URL}" > /dev/null 2>&1; then
        log_success "File can be retrieved at: ${RETRIEVAL_URL}"
    else
        log_warning "File not yet available for retrieval (expected if upload processing not implemented)"
    fi
}

# Main execution
main() {
    echo "=== Ginxsom Blossom Upload Test ==="
    echo "Timestamp: $(date -Iseconds)"
    echo
    
    # check_prerequisites
    # check_server
    create_test_file
    calculate_hash
    generate_nostr_event
    create_auth_header
    perform_upload
    # test_retrieval
    
    echo
    log_info "Test completed!"
    echo "Summary:"
    echo "  Test file: ${TEST_FILE}"
    echo "  File hash: ${HASH}"
    echo "  Server: ${SERVER_URL}"
    echo "  Upload endpoint: ${UPLOAD_ENDPOINT}"
}

# Run main function
main "$@"