package pdf

import (
	"fmt"
	"time"

	"code.springupsoftware.com/cmc/cmc-sales/internal/cmc/db"
)

// QuotePDFData contains all data needed to generate a quote PDF
type QuotePDFData struct {
	Document           *db.Document
	Quote              interface{} // Quote specific data
	Enquiry            *db.Enquiry
	Customer           *db.Customer
	Contact            interface{} // Contact data
	User               *db.GetUserRow
	LineItems          []db.GetLineItemsTableRow
	Currency           interface{} // Currency data
	CurrencySymbol     string
	ShowGST            bool
	CommercialComments string
}

// GenerateQuotePDF generates a PDF for a quote
func GenerateQuotePDF(data *QuotePDFData, outputDir string) (string, error) {
	fmt.Printf("GenerateQuotePDF called with outputDir: %s\n", outputDir)
	gen := NewGenerator(outputDir)

	// First page with header
	gen.AddPage()
	gen.Page1Header()

	// Extract data for details box
	companyName := "" // TODO: Get from customer data
	if data.Customer != nil {
		companyName = data.Customer.Name
	}
	emailTo := ""   // TODO: Get from contact
	attention := "" // TODO: Get from contact
	fromName := fmt.Sprintf("%s %s", data.User.FirstName, data.User.LastName)
	fromEmail := data.User.Email

	// Use CMC reference as the quote number
	quoteNumber := data.Document.CmcReference
	if data.Document.Revision > 0 {
		quoteNumber = fmt.Sprintf("%s.%d", quoteNumber, data.Document.Revision)
	}

	yourReference := fmt.Sprintf("Enquiry on %s", data.Document.Created.Format("2 Jan 2006"))
	issueDate := data.Document.Created.Format("2 January 2006")

	// Add details box
	gen.DetailsBox("QUOTE", companyName, emailTo, attention, fromName, fromEmail, quoteNumber, yourReference, issueDate)

	// Add page content if any
	// TODO: Add document pages content

	gen.Page1Footer()

	// Add pricing page
	gen.AddPage()
	gen.pdf.SetFont("Helvetica", "B", 14)
	gen.pdf.CellFormat(0, 10, "PRICING & SPECIFICATIONS", "", 1, "C", false, 0, "")
	gen.pdf.Ln(5)

	// Convert line items
	pdfItems := make([]LineItem, len(data.LineItems))
	for i, item := range data.LineItems {
		unitPrice := 0.0
		totalPrice := 0.0

		// Parse prices
		if item.GrossUnitPrice.Valid {
			fmt.Sscanf(item.GrossUnitPrice.String, "%f", &unitPrice)
		}
		if item.GrossPrice.Valid {
			fmt.Sscanf(item.GrossPrice.String, "%f", &totalPrice)
		}

		pdfItems[i] = LineItem{
			ItemNumber: item.ItemNumber,
			Quantity:   item.Quantity,
			Title:      item.Title,
			UnitPrice:  unitPrice,
			TotalPrice: totalPrice,
		}
	}

	// Add line items table
	gen.AddLineItemsTable(pdfItems, data.CurrencySymbol, data.ShowGST)

	// Add commercial comments if any
	if data.CommercialComments != "" {
		gen.pdf.Ln(10)
		gen.pdf.SetFont("Helvetica", "B", 10)
		gen.pdf.CellFormat(0, 5, "COMMERCIAL COMMENTS", "", 1, "L", false, 0, "")
		gen.pdf.SetFont("Helvetica", "", 9)
		gen.pdf.MultiCell(0, 5, data.CommercialComments, "", "L", false)
	}

	// TODO: Add terms and conditions page

	// Generate filename
	filename := quoteNumber
	if data.Document.Revision > 0 {
		filename = fmt.Sprintf("%s_%d.pdf", quoteNumber, data.Document.Revision)
	} else {
		filename = fmt.Sprintf("%s.pdf", quoteNumber)
	}

	// Save PDF
	fmt.Printf("Saving PDF with filename: %s to outputDir: %s\n", filename, outputDir)
	err := gen.Save(filename)
	if err != nil {
		fmt.Printf("Error saving PDF: %v\n", err)
	} else {
		fmt.Printf("PDF saved successfully: %s\n", filename)
	}
	return filename, err
}

// InvoicePDFData contains all data needed to generate an invoice PDF
type InvoicePDFData struct {
	Document            *db.Document
	Invoice             *db.Invoice
	Enquiry             *db.Enquiry
	Customer            *db.Customer
	Job                 interface{} // Job data
	LineItems           []db.GetLineItemsTableRow
	Currency            interface{} // Currency data
	CurrencySymbol      string
	CurrencyCode        string
	ShowGST             bool
	ShipVia             string
	FOB                 string
	IssueDate           time.Time
	IssueDateString     string
	BillTo              string
	ShipTo              string
	ShippingDetails     string
	CustomerOrderNumber string
	JobTitle            string
	PaymentTerms        string
	CustomerABN         string
	Subtotal            float64
	GSTAmount           float64
	Total               float64
}

// GenerateInvoicePDF generates a PDF for an invoice matching old TCPDF layout
func GenerateInvoicePDF(data *InvoicePDFData, outputDir string) (string, error) {
	gen := NewGenerator(outputDir)

	// First page with header
	gen.AddPage()
	gen.Page1Header()

	// Title - TAX INVOICE
	gen.pdf.SetFont("Helvetica", "B", 18)
	gen.pdf.SetTextColor(0, 0, 0)
	gen.pdf.CellFormat(0, 10, "TAX INVOICE", "", 1, "C", false, 0, "")
	gen.pdf.Ln(3)

	// Shipping/Billing Box with payment details (matches old TCPDF layout)
	gen.AddInvoiceShippingBillingBox(data)

	// Details table - CUSTOMER ORDER NO, JOB #, FOB, PAYMENT TERMS, ABN
	gen.pdf.Ln(2)
	gen.AddInvoiceDetailsTable(data)

	gen.pdf.Ln(3)

	// Line items table with freight and totals (matches old TCPDF layout)
	gen.AddInvoiceLineItemsTableWithShipping(data)

	gen.Page1Footer()

	// Add terms and conditions page
	gen.AddTermsAndConditions()

	// Generate filename and save
	filename := fmt.Sprintf("%s.pdf", data.Invoice.Title)
	if err := gen.Save(filename); err != nil {
		return "", err
	}
	return filename, nil
}

// PurchaseOrderPDFData contains all data needed to generate a purchase order PDF
type PurchaseOrderPDFData struct {
	Document       *db.Document
	PurchaseOrder  *db.PurchaseOrder
	Principle      *db.Principle
	LineItems      []db.GetLineItemsTableRow
	Currency       interface{} // Currency data
	CurrencySymbol string
	ShowGST        bool
}

// GeneratePurchaseOrderPDF generates a PDF for a purchase order
func GeneratePurchaseOrderPDF(data *PurchaseOrderPDFData, outputDir string) (string, error) {
	gen := NewGenerator(outputDir)

	// First page with header
	gen.AddPage()
	gen.Page1Header()

	// Extract data for details box
	companyName := data.Principle.Name
	emailTo := ""   // TODO: Get from principle contact
	attention := "" // TODO: Get from principle contact
	fromName := ""  // TODO: Get from user
	fromEmail := "" // TODO: Get from user
	poNumber := data.PurchaseOrder.Title

	yourReference := data.PurchaseOrder.PrincipleReference
	issueDate := data.PurchaseOrder.IssueDate.Format("Monday, 2 January 2006")

	// Add details box
	gen.DetailsBox("PURCHASE ORDER", companyName, emailTo, attention, fromName, fromEmail, poNumber, yourReference, issueDate)

	// Add PO specific details
	gen.pdf.Ln(5)
	gen.pdf.SetFont("Helvetica", "B", 10)
	gen.pdf.CellFormat(40, 5, "Ordered From:", "", 0, "L", false, 0, "")
	gen.pdf.SetFont("Helvetica", "", 10)
	gen.pdf.MultiCell(0, 5, data.PurchaseOrder.OrderedFrom, "", "L", false)

	gen.pdf.SetFont("Helvetica", "B", 10)
	gen.pdf.CellFormat(40, 5, "Dispatch By:", "", 0, "L", false, 0, "")
	gen.pdf.SetFont("Helvetica", "", 10)
	gen.pdf.CellFormat(0, 5, data.PurchaseOrder.DispatchBy, "", 1, "L", false, 0, "")

	gen.pdf.SetFont("Helvetica", "B", 10)
	gen.pdf.CellFormat(40, 5, "Deliver To:", "", 0, "L", false, 0, "")
	gen.pdf.SetFont("Helvetica", "", 10)
	gen.pdf.MultiCell(0, 5, data.PurchaseOrder.DeliverTo, "", "L", false)

	if data.PurchaseOrder.ShippingInstructions != "" {
		gen.pdf.SetFont("Helvetica", "B", 10)
		gen.pdf.CellFormat(0, 5, "Shipping Instructions:", "", 1, "L", false, 0, "")
		gen.pdf.SetFont("Helvetica", "", 10)
		gen.pdf.MultiCell(0, 5, data.PurchaseOrder.ShippingInstructions, "", "L", false)
	}

	gen.Page1Footer()

	// Add line items page
	gen.AddPage()
	gen.pdf.SetFont("Helvetica", "B", 14)
	gen.pdf.CellFormat(0, 10, "ORDER DETAILS", "", 1, "C", false, 0, "")
	gen.pdf.Ln(5)

	// Convert line items
	pdfItems := make([]LineItem, len(data.LineItems))
	for i, item := range data.LineItems {
		unitPrice := 0.0
		totalPrice := 0.0

		// Parse prices
		if item.GrossUnitPrice.Valid {
			fmt.Sscanf(item.GrossUnitPrice.String, "%f", &unitPrice)
		}
		if item.GrossPrice.Valid {
			fmt.Sscanf(item.GrossPrice.String, "%f", &totalPrice)
		}

		pdfItems[i] = LineItem{
			ItemNumber: item.ItemNumber,
			Quantity:   item.Quantity,
			Title:      item.Title,
			UnitPrice:  unitPrice,
			TotalPrice: totalPrice,
		}
	}

	// Add line items table
	gen.AddLineItemsTable(pdfItems, data.CurrencySymbol, data.ShowGST)

	// Generate filename
	filename := poNumber
	if data.Document.Revision > 0 {
		filename = fmt.Sprintf("%s-Rev%d.pdf", data.PurchaseOrder.Title, data.Document.Revision)
	} else {
		filename = fmt.Sprintf("%s.pdf", data.PurchaseOrder.Title)
	}

	// Save PDF
	err := gen.Save(filename)
	return filename, err
}