package mailq

import (
	"errors"
	"fmt"
	"time"
)

type MailQ struct {
	NumTotal    int
	NumActive   int
	NumHold     int
	NumDeferred int
	Entries     []QEntry
}

type QEntry struct {
	Id         string
	Status     string
	Date       time.Time
	Size       int
	Sender     string
	Recipients []string
	Reason     string
}

func NewQueue() MailQ {
	return MailQ{}
}

func (q MailQ) AddEntry(entry QEntry) {
	q.NumTotal += 1
	if entry.Status == "active" {
		q.NumActive += 1
	} else if entry.Status == "deferred" {
		q.NumDeferred += 1
	} else if entry.Status == "hold" {
		q.NumHold += 1
	}
	q.Entries = append(q.Entries, entry)
}

func (q MailQ) RemoveEntry(entry QEntry) {
	var currentIndex int
	var currentEntry QEntry
	for currentIndex, currentEntry = range q.Entries {
		if currentEntry.Id == entry.Id {
			break
		}
	}
	q.Entries = append(q.Entries[:currentIndex], q.Entries[currentIndex+1:]...)
}

func (q MailQ) GetMessageById(id string) (QEntry, error) {
	for _, entry := range q.Entries {
		if entry.Id == id {
			return entry, nil
		}
	}
	return QEntry{}, errors.New(fmt.Sprintf("No message with id '%s' available!", id))
}