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// ERP Integration Architecture
interface ManufacturingERP {
  // Production Planning Module
  productionPlanning: {
    demandForecasting: boolean
    capacityPlanning: boolean
    materialRequirements: boolean
    scheduleOptimization: boolean
  }

  // Inventory Management
  inventory: {
    realTimeTracking: boolean
    automaticReordering: boolean
    multiLocationSync: boolean
    barcodeIntegration: boolean
  }

  // Quality Control
  quality: {
    inspectionWorkflows: boolean
    defectTracking: boolean
    supplierQualityMetrics: boolean
    certificateManagement: boolean
  }

  // Financial Integration
  finance: {
    costAccounting: boolean
    budgetTracking: boolean
    profitabilityAnalysis: boolean
    automaticJournals: boolean
  }
}

# Multi-Location ERP System
class RetailERP:
    def __init__(self):
        self.locations = []
        self.central_inventory = CentralInventory()
        self.pos_systems = []
        self.crm = CustomerRelationshipManager()

    def sync_inventory(self):
        """Real-time inventory synchronization"""
        for location in self.locations:
            stock_levels = location.get_current_stock()
            self.central_inventory.update(location.id, stock_levels)

    def automatic_transfer(self, item_id, from_store, to_store, quantity):
        """Automated stock transfers between stores"""
        if self.central_inventory.can_transfer(item_id, from_store, quantity):
            transfer_order = self.create_transfer_order(
                item_id, from_store, to_store, quantity
            )
            return self.execute_transfer(transfer_order)

    def dynamic_pricing(self, item_id, location_id):
        """Location-based dynamic pricing"""
        local_demand = self.get_local_demand(item_id, location_id)
        competitor_prices = self.get_competitor_prices(item_id, location_id)
        return self.calculate_optimal_price(local_demand, competitor_prices)

interface BusinessProcessAudit {
  // Department Analysis
  departments: {
    sales: ProcessEfficiency
    inventory: ProcessEfficiency
    finance: ProcessEfficiency
    hr: ProcessEfficiency
    production?: ProcessEfficiency
  }

  // Data Flow Analysis
  dataFlows: {
    customerData: DataFlow
    inventoryData: DataFlow
    financialData: DataFlow
    productionData?: DataFlow
  }

  // Integration Points
  currentSystems: {
    accounting: SystemProfile
    ecommerce: SystemProfile
    pos: SystemProfile
    crm?: SystemProfile
  }

  // Pain Point Identification
  painPoints: {
    manual_processes: PainPoint[]
    data_silos: PainPoint[]
    reporting_delays: PainPoint[]
    accuracy_issues: PainPoint[]
  }
}

-- Core ERP Database Schema
-- Customer Management
CREATE TABLE customers (
    id SERIAL PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    email VARCHAR(255) UNIQUE,
    phone VARCHAR(20),
    address JSONB,
    credit_limit DECIMAL(10,2),
    payment_terms INTEGER,
    created_at TIMESTAMP DEFAULT NOW()
);

-- Product & Inventory
CREATE TABLE products (
    id SERIAL PRIMARY KEY,
    sku VARCHAR(50) UNIQUE NOT NULL,
    name VARCHAR(255) NOT NULL,
    category_id INTEGER,
    unit_cost DECIMAL(10,2),
    selling_price DECIMAL(10,2),
    min_stock_level INTEGER,
    max_stock_level INTEGER
);

CREATE TABLE inventory (
    id SERIAL PRIMARY KEY,
    product_id INTEGER REFERENCES products(id),
    location_id INTEGER,
    quantity INTEGER NOT NULL,
    reserved_quantity INTEGER DEFAULT 0,
    last_updated TIMESTAMP DEFAULT NOW()
);

-- Sales & Orders
CREATE TABLE sales_orders (
    id SERIAL PRIMARY KEY,
    customer_id INTEGER REFERENCES customers(id),
    order_date DATE NOT NULL,
    delivery_date DATE,
    status VARCHAR(20) DEFAULT 'pending',
    total_amount DECIMAL(12,2),
    created_by INTEGER
);

-- Financial Integration
CREATE TABLE journal_entries (
    id SERIAL PRIMARY KEY,
    transaction_date DATE NOT NULL,
    reference_type VARCHAR(50),
    reference_id INTEGER,
    debit_account VARCHAR(20),
    credit_account VARCHAR(20),
    amount DECIMAL(12,2),
    description TEXT
);

// Real-time Dashboard Component
class ERPDashboard {
    constructor() {
        this.metrics = new MetricsCollector()
        this.charts = new ChartRenderer()
        this.alerts = new AlertSystem()
    }

    async loadDashboard() {
        const data = await Promise.all([
            this.metrics.getSalesMetrics(),
            this.metrics.getInventoryMetrics(),
            this.metrics.getFinancialMetrics(),
            this.metrics.getOperationalMetrics()
        ])

        return {
            sales: this.processSalesData(data[0]),
            inventory: this.processInventoryData(data[1]),
            financial: this.processFinancialData(data[2]),
            operational: this.processOperationalData(data[3])
        }
    }

    generateAlerts() {
        const alerts = []

        // Low stock alerts
        const lowStock = this.metrics.getLowStockItems()
        if (lowStock.length > 0) {
            alerts.push({
                type: 'warning',
                message: `${lowStock.length} items below minimum stock level`,
                action: 'review_inventory'
            })
        }

        // Overdue payments
        const overduePayments = this.metrics.getOverduePayments()
        if (overduePayments.total > 0) {
            alerts.push({
                type: 'danger',
                message: `₺${overduePayments.total.toLocaleString()} in overdue payments`,
                action: 'review_receivables'
            })
        }

        return alerts
    }
}

# ERP System Testing Suite
npm run test:unit          # Unit tests for all modules
npm run test:integration   # Integration testing
npm run test:performance   # Load and performance testing
npm run test:security      # Security vulnerability testing
npm run test:user          # User acceptance testing

interface GoLiveStrategy {
  // Phased Rollout
  phase1: 'Core modules (Sales, Inventory)'
  phase2: 'Financial integration'
  phase3: 'Advanced features (Reporting, Analytics)'

  // Data Migration
  dataMigration: {
    customerData: 'Validated and imported'
    productData: 'Categorized and structured'
    inventoryData: 'Physical count and reconciliation'
    financialData: 'Opening balances and historical data'
  }

  // User Training
  training: {
    administrators: '16 hours intensive training'
    powerUsers: '12 hours role-specific training'
    endUsers: '8 hours basic operations training'
    ongoing: 'Monthly refresher sessions'
  }

  // Support Structure
  support: {
    level1: '24/7 helpdesk for critical issues'
    level2: 'Technical support for system issues'
    level3: 'Development team for customizations'
  }
}

interface ManufacturingERP {
  // Production Planning
  productionPlanning: {
    bomManagement: boolean      // Bill of Materials
    routingDefinition: boolean  // Production routes
    capacityPlanning: boolean   // Resource planning
    shopFloorControl: boolean   // Work order management
  }

  // Quality Management
  qualityControl: {
    inspectionPlans: boolean    // Quality checkpoints
    defectTracking: boolean     // Non-conformance tracking
    supplierQuality: boolean    // Vendor quality metrics
    certificates: boolean       // Quality certificates
  }

  // Maintenance
  maintenance: {
    preventiveMaintenance: boolean  // Scheduled maintenance
    workOrderManagement: boolean    // Maintenance requests
    spareParts: boolean             // Parts inventory
    equipmentHistory: boolean       // Maintenance history
  }
}

interface RetailERP {
  // Multi-Channel Sales
  salesChannels: {
    pos: boolean               // Point of sale
    ecommerce: boolean         // Online store
    marketplace: boolean       // Third-party platforms
    mobileApp: boolean         // Mobile commerce
  }

  // Customer Management
  customerManagement: {
    loyaltyPrograms: boolean   // Customer loyalty
    segmentation: boolean      // Customer grouping
    personalizedPricing: boolean // Dynamic pricing
    campaignManagement: boolean // Marketing campaigns
  }

  // Inventory Optimization
  inventoryOptimization: {
    demandForecasting: boolean  // Sales prediction
    seasonalPlanning: boolean   // Seasonal adjustments
    slowMovingAnalysis: boolean // Dead stock identification
    replenishmentPlanning: boolean // Automatic reordering
  }
}

interface ServiceERP {
  // Project Management
  projectManagement: {
    timeTracking: boolean      // Employee time logging
    expenseTracking: boolean   // Project expenses
    milestoneTracking: boolean // Project progress
    resourceAllocation: boolean // Team assignment
  }

  // Customer Service
  customerService: {
    ticketManagement: boolean  // Support tickets
    knowledgeBase: boolean     // Self-service portal
    slaTracking: boolean       // Service level agreements
    customerSatisfaction: boolean // Feedback collection
  }

  // Billing & Invoicing
  billing: {
    timeBasedBilling: boolean  // Hourly billing
    milestoneInvoicing: boolean // Project-based billing
    recurringBilling: boolean   // Subscription billing
    expenseReimbursement: boolean // Expense billing
  }
}

function calculateERPROI({
  employees,
  averageHourlyRate,
  manualHoursPerWeek,
  errorRatePercentage,
  averageErrorCost,
  erpImplementationCost
}) {
  // Current costs
  const annualLaborCost = employees * averageHourlyRate * manualHoursPerWeek * 52
  const annualErrorCost = (manualHoursPerWeek * 52 * errorRatePercentage / 100) * averageErrorCost
  const totalCurrentCost = annualLaborCost + annualErrorCost

  // ERP benefits (conservative estimates)
  const laborReduction = 0.6  // 60% reduction in manual work
  const errorReduction = 0.85 // 85% reduction in errors

  const newLaborCost = annualLaborCost * (1 - laborReduction)
  const newErrorCost = annualErrorCost * (1 - errorReduction)
  const totalNewCost = newLaborCost + newErrorCost

  const annualSavings = totalCurrentCost - totalNewCost
  const paybackPeriod = erpImplementationCost / (annualSavings / 12)
  const threeYearROI = ((annualSavings * 3 - erpImplementationCost) / erpImplementationCost) * 100

  return {
    currentAnnualCost: totalCurrentCost,
    projectedAnnualCost: totalNewCost,
    annualSavings: annualSavings,
    paybackMonths: paybackPeriod,
    threeYearROI: threeYearROI
  }
}

// Example: 100-employee company
const result = calculateERPROI({
  employees: 100,
  averageHourlyRate: 75,
  manualHoursPerWeek: 120,
  errorRatePercentage: 15,
  averageErrorCost: 2500,
  erpImplementationCost: 250000
})

console.log(`Annual savings: ₺${result.annualSavings.toLocaleString()}`)
console.log(`Payback period: ${result.paybackMonths.toFixed(1)} months`)
console.log(`3-year ROI: ${result.threeYearROI.toFixed(0)}%`)

// Cloud-native architecture benefits
interface CloudERP {
  scalability: 'Auto-scaling based on demand'
  accessibility: 'Access from anywhere, any device'
  updates: 'Automatic updates and new features'
  security: 'Enterprise-grade security by default'
  integration: 'API-first architecture'
  cost: 'Pay-as-you-grow pricing model'
}

# AI integration examples
class AIEnhancedERP:
    def demand_forecasting(self, historical_data):
        """Machine learning-based demand prediction"""
        model = TimeSeriesForecaster()
        return model.predict(historical_data)

    def intelligent_pricing(self, product_id, market_data):
        """AI-driven dynamic pricing"""
        pricing_engine = PricingAI()
        return pricing_engine.optimize_price(product_id, market_data)

    def automated_categorization(self, expense_description):
        """Automatic expense categorization"""
        nlp_model = ExpenseCategorizer()
        return nlp_model.categorize(expense_description)

// Mobile ERP interface
const MobileERPDashboard = () => {
  return (
    <div className="mobile-erp">
      <header className="dashboard-header">
        <h1>ERP Mobile</h1>
        <NotificationBadge count={5} />
      </header>

      <section className="quick-actions">
        <QuickAction icon="📦" label="Check Stock" />
        <QuickAction icon="💰" label="View Sales" />
        <QuickAction icon="📋" label="Approve Orders" />
        <QuickAction icon="📊" label="Reports" />
      </section>

      <section className="real-time-metrics">
        <MetricCard 
          title="Today's Sales" 
          value="₺45,230" 
          change="+12%" 
        />
        <MetricCard 
          title="Pending Orders" 
          value="23" 
          change="-5%" 
        />
      </section>
    </div>
  )
}