package changes

import (
	"log"
	"strconv"
	"time"

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

// Submit a change to the database. The objects may be any supported model, or arrays.
func Submit(model, op, author string, listed bool, keys []models.ChangeKey, objects ...interface{}) (models.Change, error) {
	submitMutex.Lock()
	defer submitMutex.Unlock()

	id, err := counter.Next("auto_increment", "Change")
	if err != nil {
		return models.Change{}, err
	}

	if !models.ChangeModel(model).IsValid() {
		panic("Invalid model")
	}

	// Silently discard * keys on unlisted changes.
	if !listed {
		keysCopy := make([]models.ChangeKey, len(keys))
		copy(keysCopy, keys)
		keys = keysCopy

		deletes := make([]int, 0, 1)
		for i, key := range keys {
			if key.ID == "*" {
				deletes = append(deletes, i-len(deletes))
			}
		}

		for _, index := range deletes {
			keys = append(keys[:index], keys[index+1:]...)
		}
	}

	change := models.Change{
		ID:     "Change_" + strconv.Itoa(id),
		Model:  models.ChangeModel(model),
		Date:   time.Now(),
		Op:     op,
		Author: author,
		Keys:   keys,
		Listed: listed,
	}

	for _, object := range objects {
		switch object := object.(type) {
		case models.Log:
			change.Logs = append(change.Logs, object)
		case []models.Log:
			change.Logs = append(change.Logs, object...)
		case models.Character:
			change.Characters = append(change.Characters, object)
		case []models.Character:
			change.Characters = append(change.Characters, object...)
		case models.Channel:
			change.Channels = append(change.Channels, object)
		case []models.Channel:
			change.Channels = append(change.Channels, object...)
		case models.Post:
			change.Posts = append(change.Posts, object)
		case []models.Post:
			change.Posts = append(change.Posts, object...)
		case models.Story:
			change.Stories = append(change.Stories, object)
		case []models.Story:
			change.Stories = append(change.Stories, object...)
		case models.Tag:
			change.Tags = append(change.Tags, object)
		case []models.Tag:
			change.Tags = append(change.Tags, object...)
		case models.Chapter:
			change.Chapters = append(change.Chapters, object)
		case []models.Chapter:
			change.Chapters = append(change.Chapters, object...)
		default:
			log.Printf("Warning: unrecognized object in change: %#+v", object)
		}
	}

	pushToSubscribers(change)

	err = collection.Insert(&change)
	if err != nil {
		return models.Change{}, err
	}

	return change, nil
}