package logs

import (
	"errors"
	"time"

	"git.aiterp.net/rpdata/api/internal/importers/mirclike"

	"git.aiterp.net/rpdata/api/models/posts"

	"git.aiterp.net/rpdata/api/models/channels"

	"git.aiterp.net/rpdata/api/internal/importers/forumlog"

	"git.aiterp.net/rpdata/api/models"
)

// An ImportedLog contains data about an imported log.
type ImportedLog struct {
	Log   models.Log
	Posts []models.Post
}

// Import makes a log and posts object from different formats.
func Import(importer models.LogImporter, date time.Time, tz *time.Location, channelName string, data string) ([]ImportedLog, error) {
	results := make([]ImportedLog, 0, 8)

	eventName := ""
	if channel, err := channels.FindName(channelName); err != nil {
		eventName = channel.EventName
	}

	date = date.In(tz)

	switch importer {
	case models.LogImporterMircLike:
		{
			if date.IsZero() {
				return nil, errors.New("Date is not optional for mirc-like logs")
			}

			parsedLog, parsedPosts, err := mirclike.ParseLog(data, date, true)
			if err != nil {
				return nil, err
			}

			log, err := Add(parsedLog.Date, channelName, "", eventName, "", false)
			if err != nil {
				return nil, err
			}

			posts, err := posts.AddMany(log, parsedPosts)
			if err != nil {
				return nil, err
			}

			results = append(results, ImportedLog{
				Log:   log,
				Posts: posts,
			})
		}
	case models.LogImporterForumLog:
		{
			parseResults, err := forumlog.ParseLogs(data, tz)
			if err != nil {
				return nil, err
			}

			for _, result := range parseResults {
				log, err := Add(result.Log.Date, channelName, "", eventName, "", false)
				if err != nil {
					return nil, err
				}

				posts, err := posts.AddMany(log, result.Posts)
				if err != nil {
					return nil, err
				}

				results = append(results, ImportedLog{
					Log:   log,
					Posts: posts,
				})
			}
		}
	default:
		{
			return nil, errors.New("Invalid importer: " + importer.String())
		}
	}

	return results, nil
}