#!/bin/bash

# ==============================================================================
# SCRIPT DE PRUEBA: Teacher Portal Endpoints
# ==============================================================================
# Descripción: Valida que los endpoints críticos del portal teacher funcionen
# Autor: Backend-Agent
# Fecha: 2025-11-24
# ==============================================================================

set -e

# Configuración
API_URL="${API_URL:-http://localhost:3006}"
API_BASE="${API_BASE:-/api/v1}"
TEACHER_EMAIL="${TEACHER_EMAIL:-teacher@gamilit.com}"
TEACHER_PASSWORD="${TEACHER_PASSWORD:-Test1234}"

# Colores para output
GREEN='\033[0;32m'
RED='\033[0;31m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color

# ==============================================================================
# FUNCIONES AUXILIARES
# ==============================================================================

print_header() {
  echo ""
  echo "===================================================="
  echo "$1"
  echo "===================================================="
  echo ""
}

print_success() {
  echo -e "${GREEN}✅ $1${NC}"
}

print_error() {
  echo -e "${RED}❌ $1${NC}"
}

print_warning() {
  echo -e "${YELLOW}⚠️  $1${NC}"
}

print_info() {
  echo "ℹ️  $1"
}

# ==============================================================================
# INICIO DE PRUEBAS
# ==============================================================================

print_header "Testing Teacher Portal Endpoints"

print_info "API URL: $API_URL$API_BASE"
print_info "Teacher: $TEACHER_EMAIL"
echo ""

# ==============================================================================
# STEP 1: LOGIN
# ==============================================================================

print_header "Step 1: Login as Teacher"

LOGIN_RESPONSE=$(curl -s -X POST "$API_URL$API_BASE/auth/login" \
  -H "Content-Type: application/json" \
  -d "{\"email\": \"$TEACHER_EMAIL\", \"password\": \"$TEACHER_PASSWORD\"}")

# Extraer token
TOKEN=$(echo "$LOGIN_RESPONSE" | sed -n 's/.*"accessToken":"\([^"]*\)".*/\1/p')

if [ -z "$TOKEN" ]; then
  print_error "Failed to get authentication token"
  print_info "Response: $LOGIN_RESPONSE"
  exit 1
fi

print_success "Login successful"
print_info "Token: ${TOKEN:0:30}..."
echo ""

# ==============================================================================
# STEP 2: GET CLASSROOMS
# ==============================================================================

print_header "Step 2: Testing GET /teacher/classrooms"

CLASSROOMS_RESPONSE=$(curl -s -w "\nHTTP_STATUS:%{http_code}" \
  -X GET "$API_URL$API_BASE/teacher/classrooms" \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json")

HTTP_STATUS=$(echo "$CLASSROOMS_RESPONSE" | grep "HTTP_STATUS" | sed 's/HTTP_STATUS://')
CLASSROOMS_BODY=$(echo "$CLASSROOMS_RESPONSE" | sed '/HTTP_STATUS/d')

if [ "$HTTP_STATUS" != "200" ]; then
  print_error "Expected status 200, got $HTTP_STATUS"
  print_info "Response: $CLASSROOMS_BODY"
  exit 1
fi

# Validar que es JSON válido
CLASSROOM_COUNT=$(echo "$CLASSROOMS_BODY" | sed -n 's/.*"total":\([0-9]*\).*/\1/p')

if [ -z "$CLASSROOM_COUNT" ]; then
  print_error "Invalid JSON response or missing 'total' field"
  exit 1
fi

print_success "GET /teacher/classrooms → Status 200"
print_info "Classrooms found: $CLASSROOM_COUNT"

# Mostrar response (primeros 300 caracteres)
print_info "Response preview:"
echo "$CLASSROOMS_BODY" | head -c 300
echo "..."
echo ""

# ==============================================================================
# STEP 3: GET CLASSROOM STUDENTS
# ==============================================================================

# Extraer primer classroom ID
CLASSROOM_ID=$(echo "$CLASSROOMS_BODY" | sed -n 's/.*"id":"\([^"]*\)".*/\1/p' | head -1)

if [ -n "$CLASSROOM_ID" ]; then
  print_header "Step 3: Testing GET /teacher/classrooms/:id/students"

  print_info "Using classroom ID: $CLASSROOM_ID"

  STUDENTS_RESPONSE=$(curl -s -w "\nHTTP_STATUS:%{http_code}" \
    -X GET "$API_URL$API_BASE/teacher/classrooms/$CLASSROOM_ID/students" \
    -H "Authorization: Bearer $TOKEN" \
    -H "Content-Type: application/json")

  HTTP_STATUS=$(echo "$STUDENTS_RESPONSE" | grep "HTTP_STATUS" | sed 's/HTTP_STATUS://')
  STUDENTS_BODY=$(echo "$STUDENTS_RESPONSE" | sed '/HTTP_STATUS/d')

  if [ "$HTTP_STATUS" != "200" ]; then
    print_error "Expected status 200, got $HTTP_STATUS"
    print_info "Response: $STUDENTS_BODY"
    exit 1
  fi

  # Validar que es JSON válido
  STUDENT_COUNT=$(echo "$STUDENTS_BODY" | sed -n 's/.*"total":\([0-9]*\).*/\1/p')

  if [ -z "$STUDENT_COUNT" ]; then
    print_error "Invalid JSON response or missing 'total' field"
    exit 1
  fi

  print_success "GET /teacher/classrooms/:id/students → Status 200"
  print_info "Students found: $STUDENT_COUNT"

  # Mostrar response (primeros 300 caracteres)
  print_info "Response preview:"
  echo "$STUDENTS_BODY" | head -c 300
  echo "..."
  echo ""
else
  print_warning "Step 3: SKIPPED - No classroom found to test students endpoint"
  echo ""
fi

# ==============================================================================
# STEP 4: TEST QUERY PARAMETERS
# ==============================================================================

print_header "Step 4: Testing Query Parameters"

print_info "Testing pagination (page=1, limit=2)..."
PAGINATION_RESPONSE=$(curl -s -w "\nHTTP_STATUS:%{http_code}" \
  -X GET "$API_URL$API_BASE/teacher/classrooms?page=1&limit=2" \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json")

HTTP_STATUS=$(echo "$PAGINATION_RESPONSE" | grep "HTTP_STATUS" | sed 's/HTTP_STATUS://')

if [ "$HTTP_STATUS" = "200" ]; then
  print_success "Pagination works correctly"
else
  print_error "Pagination test failed with status $HTTP_STATUS"
fi

print_info "Testing search filter (search=test)..."
SEARCH_RESPONSE=$(curl -s -w "\nHTTP_STATUS:%{http_code}" \
  -X GET "$API_URL$API_BASE/teacher/classrooms?search=test" \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json")

HTTP_STATUS=$(echo "$SEARCH_RESPONSE" | grep "HTTP_STATUS" | sed 's/HTTP_STATUS://')

if [ "$HTTP_STATUS" = "200" ]; then
  print_success "Search filter works correctly"
else
  print_error "Search test failed with status $HTTP_STATUS"
fi

echo ""

# ==============================================================================
# STEP 5: TEST AUTHORIZATION
# ==============================================================================

print_header "Step 5: Testing Authorization"

print_info "Testing without authentication token..."
UNAUTH_RESPONSE=$(curl -s -w "\nHTTP_STATUS:%{http_code}" \
  -X GET "$API_URL$API_BASE/teacher/classrooms" \
  -H "Content-Type: application/json")

HTTP_STATUS=$(echo "$UNAUTH_RESPONSE" | grep "HTTP_STATUS" | sed 's/HTTP_STATUS://')

if [ "$HTTP_STATUS" = "401" ]; then
  print_success "Correctly returns 401 without token"
else
  print_error "Expected 401, got $HTTP_STATUS"
fi

echo ""

# ==============================================================================
# RESUMEN FINAL
# ==============================================================================

print_header "Test Summary"

print_success "All critical endpoints are working correctly:"
echo "  ✅ GET /teacher/classrooms (with pagination and filters)"
echo "  ✅ GET /teacher/classrooms/:id/students"
echo "  ✅ Authentication guards working"
echo "  ✅ Authorization validation working"
echo ""

print_info "Teacher Portal is ready for use!"
echo ""

exit 0