// Read-only audit of terminalid coverage on pos_orders.
//
// Answers one question: are blank terminal codes still arriving, or do they all
// predate the posTerminalFor fix? Touches nothing.
//
//	go run ./scratch/termaudit
package main

import (
	"fmt"
	"log"
	"os"

	"github.com/joho/godotenv"
	"gorm.io/driver/postgres"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"
)

func main() {
	_ = godotenv.Load()
	dsn := fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=%s sslmode=disable",
		os.Getenv("DB_HOST"), os.Getenv("DB_PORT"), os.Getenv("DB_USER"),
		os.Getenv("DB_PASSWORD"), os.Getenv("DB_NAME"))
	db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{Logger: logger.Default.LogMode(logger.Silent)})
	if err != nil {
		log.Fatal(err)
	}

	var rows []struct {
		Day     string
		Blank   int
		Named   int
		Invoice string
	}
	db.Raw(`SELECT to_char(receivedat,'YYYY-MM-DD') AS day,
	          COUNT(*) FILTER (WHERE COALESCE(terminalid,'') = '') AS blank,
	          COUNT(*) FILTER (WHERE COALESCE(terminalid,'') <> '') AS named,
	          MIN(invoicenumber) AS invoice
	        FROM pos_orders GROUP BY 1 ORDER BY 1`).Scan(&rows)

	fmt.Printf("%-12s %7s %7s   %s\n", "received", "blank", "named", "sample invoice")
	for _, r := range rows {
		fmt.Printf("%-12s %7d %7d   %s\n", r.Day, r.Blank, r.Named, r.Invoice)
	}

	var last struct {
		Invoicenumber string
		Terminalid    string
		Receivedat    string
	}
	db.Raw(`SELECT invoicenumber, COALESCE(terminalid,'') AS terminalid,
	          to_char(receivedat,'YYYY-MM-DD HH24:MI') AS receivedat
	        FROM pos_orders WHERE COALESCE(terminalid,'') = ''
	        ORDER BY receivedat DESC LIMIT 1`).Scan(&last)
	fmt.Printf("\nnewest blank bill: %s  received %s\n", last.Invoicenumber, last.Receivedat)

	// Does the invoice number itself carry the terminal code? INV-2608-T5EDD-00116
	var recoverable int
	db.Raw(`SELECT COUNT(*) FROM pos_orders
	        WHERE COALESCE(terminalid,'') = ''
	          AND invoicenumber ~ '^INV-[0-9]+-[A-Z0-9]+-[0-9]+$'`).Scan(&recoverable)
	fmt.Printf("blank bills whose invoice number encodes a terminal: %d\n", recoverable)
}