package main

import (
	"encoding/csv"
	"log"
	"os"
	"path/filepath"
)

type User struct {
	EVM   string `json:"evm"`
	Email string `json:"email"`
}

var (
	users map[string]*User
	lines int
)

func main() {
	users = make(map[string]*User)
	// Get the current working directory
	cwd, err := os.Getwd()
	if err != nil {
		log.Fatalf("failed to get current directory: %w", err)
	}

	// Read files in the directory
	files, err := os.ReadDir(cwd)
	if err != nil {
		log.Fatalf("failed to read directory: %w", err)
	}

	// Loop through files and open CSVs
	for _, file := range files {
		if !file.IsDir() && filepath.Ext(file.Name()) == ".csv" {
			log.Printf("Opening: %s\n", file.Name())
			f, err := os.Open(file.Name())
			if err != nil {
				log.Fatalf("failed to open file %s: %w", file.Name(), err)
			}
			defer f.Close()

			reader := csv.NewReader(f)
			records, err := reader.ReadAll()
			if err != nil {
				log.Fatalf("failed to read CSV %s: %w", file.Name(), err)
			}

			log.Printf("Read %d records from %s\n", len(records), file.Name())
			lines += len(records)

			for _, record := range records[1:] {
				u := &User{
					EVM:   record[0],
					Email: record[1],
				}
				users[u.EVM+`+`+u.Email] = u
			}
		}
	}
	log.Printf("Found %d unique records from %d lines", len(users), lines)
	return
}