package main

import (
	"errors"
	"fmt"
	"io/ioutil"
	"local/oauth2"
	"net/http"
	"net/url"
	"os"
	"strconv"
	"strings"
	"time"
)

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

func uploadTodo(config Config, transaction *Transaction) error {
	params := url.Values{
		"list":  {config.TodoList},
		"title": {transaction.Format()},
		"tag":   {config.TodoTag},
	}
	req, err := http.NewRequest("POST", config.TodoAddr+"/ajax.php?newTask", strings.NewReader(params.Encode()))
	if err != nil {
		return err
	}
	req.Header.Set("Cookie", oauth2.COOKIE+"="+config.TodoToken)
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		return err
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusOK {
		b, _ := ioutil.ReadAll(resp.Body)
		return fmt.Errorf("bad status from todo: %v: %s", resp.StatusCode, b)
	}
	return nil
}

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:"
	}
	remote += strings.ReplaceAll(transaction.Account, " ", "")
	fmt.Fprintf(f, "%-50s%-s\n", formatGMailDate(transaction.Date), transaction.Account)
	fmt.Fprintf(f, "%-50s%-50s$%.2f\n", "", "AssetAccount:"+transaction.Bank.String(), 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
}