package main

import (
	"errors"
	"fmt"
	"os"
	"regexp"
	"strconv"
	"time"

	"github.com/google/uuid"
)

func Upload(config Config, transaction *Transaction) error {
	switch config.Uploader {
	case DeprecatedUploaderTodo:
		panic("DEAD")
	case UploaderLedger:
		return uploadLedger(config, transaction)
	case UploaderPTTodo:
		return uploadPTTodo(config, transaction)
	default:
		return errors.New("not impl: uploader")
	}
}

func uploadPTTodo(config Config, transaction *Transaction) error {
	f, err := os.Create(fmt.Sprintf("%s.todo.%s", config.TodoAddr, uuid.New().String()))
	if err != nil {
		return err
	}
	defer f.Close()
	if config.TodoTag == "" {
		fmt.Fprintf(f, `- {"todo":%q}%s`, transaction.Format(), "\n")
	} else {
		fmt.Fprintf(f, `- {"todo":%q, "tags":%q}%s`, transaction.Format(), config.TodoTag, "\n")
	}
	return f.Close()
}

func uploadLedger(config Config, transaction *Transaction) error {
	f, err := os.OpenFile(config.TodoAddr, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
	if err != nil {
		return err
	}
	defer f.Close()
	amount, _ := strconv.ParseFloat(transaction.Amount, 32)
	amount *= -1
	remote := "Withdrawal:"
	if amount > 0 {
		remote = "Deposit:"
	}
	regexp := regexp.MustCompile(`[0-9a-zA-Z]`)
	for _, substr := range regexp.FindAllString(transaction.Vendor, -1) {
		remote += substr
	}
	fmt.Fprintf(f, "%-50s%-s\n", formatGMailDate(transaction.Date), transaction.Vendor)
	fmt.Fprintf(f, "%-50s%-50s$%.2f\n", "", "AssetAccount:"+transaction.Bank.String()+":"+transaction.Account, amount)
	fmt.Fprintf(f, "%-50s%-s\n", "", remote)
	return nil
}

func formatGMailDate(s string) string {
	for _, format := range []string{
		"[Mon, 2 Jan 2006 15:04:05 -0700 (MST)]",
		"[Mon, 2 Jan 2006 15:04:05 -0700]",
	} {
		time, err := time.Parse(format, s)
		if err == nil {
			return time.Format("2006-01-02")
		}
	}
	return s
}