/*
*
*	Gosora Topic File
*	Copyright Azareal 2017 - 2018
*
 */
package main

//import "fmt"
import (
	"html"
	"html/template"
	"strconv"
)

// ? - Add a TopicMeta struct for *Forums?

type Topic struct {
	ID          int
	Link        string
	Title       string
	Content     string
	CreatedBy   int
	IsClosed    bool
	Sticky      bool
	CreatedAt   string
	LastReplyAt string
	//LastReplyBy int
	ParentID  int
	Status    string // Deprecated. Marked for removal.
	IPAddress string
	PostCount int
	LikeCount int
	ClassName string // CSS Class Name
	Data      string // Used for report metadata
}

type TopicUser struct {
	ID          int
	Link        string
	Title       string
	Content     string
	CreatedBy   int
	IsClosed    bool
	Sticky      bool
	CreatedAt   string
	LastReplyAt string
	//LastReplyBy int
	ParentID  int
	Status    string // Deprecated. Marked for removal.
	IPAddress string
	PostCount int
	LikeCount int
	ClassName string
	Data      string // Used for report metadata

	UserLink      string
	CreatedByName string
	Group         int
	Avatar        string
	ContentLines  int
	ContentHTML   string
	Tag           string
	URL           string
	URLPrefix     string
	URLName       string
	Level         int
	Liked         bool
}

type TopicsRow struct {
	ID          int
	Link        string
	Title       string
	Content     string
	CreatedBy   int
	IsClosed    bool
	Sticky      bool
	CreatedAt   string
	LastReplyAt string
	LastReplyBy int
	ParentID    int
	Status      string // Deprecated. Marked for removal. -Is there anything we could use it for?
	IPAddress   string
	PostCount   int
	LikeCount   int
	ClassName   string
	Data        string // Used for report metadata

	Creator      *User
	CSS          template.CSS
	ContentLines int
	LastUser     *User

	ForumName string //TopicsRow
	ForumLink string
}

func (topic *Topic) Lock() (err error) {
	_, err = lockTopicStmt.Exec(topic.ID)
	tcache, ok := topics.(TopicCache)
	if ok {
		tcache.CacheRemove(topic.ID)
	}
	return err
}

func (topic *Topic) Unlock() (err error) {
	_, err = unlockTopicStmt.Exec(topic.ID)
	tcache, ok := topics.(TopicCache)
	if ok {
		tcache.CacheRemove(topic.ID)
	}
	return err
}

// TODO: We might want more consistent terminology rather than using stick in some places and pin in others. If you don't understand the difference, there is none, they are one and the same.
// ? - We do a CacheDelete() here instead of mutating the pointer to avoid creating a race condition
func (topic *Topic) Stick() (err error) {
	_, err = stickTopicStmt.Exec(topic.ID)
	tcache, ok := topics.(TopicCache)
	if ok {
		tcache.CacheRemove(topic.ID)
	}
	return err
}

func (topic *Topic) Unstick() (err error) {
	_, err = unstickTopicStmt.Exec(topic.ID)
	tcache, ok := topics.(TopicCache)
	if ok {
		tcache.CacheRemove(topic.ID)
	}
	return err
}

// TODO: Implement this
func (topic *Topic) AddLike(uid int) error {
	return nil
}

// TODO: Implement this
func (topic *Topic) RemoveLike(uid int) error {
	return nil
}

func (topic *Topic) Update(name string, content string) error {
	content = preparseMessage(content)
	parsed_content := parseMessage(html.EscapeString(content))
	_, err := editTopicStmt.Exec(name, content, parsed_content, topic.ID)

	tcache, ok := topics.(TopicCache)
	if ok {
		tcache.CacheRemove(topic.ID)
	}
	return err
}

func (topic *Topic) CreateActionReply(action string, ipaddress string, user User) (err error) {
	_, err = createActionReplyStmt.Exec(topic.ID, action, ipaddress, user.ID)
	if err != nil {
		return err
	}
	_, err = addRepliesToTopicStmt.Exec(1, user.ID, topic.ID)
	tcache, ok := topics.(TopicCache)
	if ok {
		tcache.CacheRemove(topic.ID)
	}
	// ? - Update the last topic cache for the parent forum?
	return err
}

func (topic *Topic) Copy() Topic {
	return *topic
}

// TODO: Refactor the caller to take a Topic and a User rather than a combined TopicUser
func getTopicUser(tid int) (TopicUser, error) {
	tcache, tok := topics.(TopicCache)
	ucache, uok := users.(UserCache)
	if tok && uok {
		topic, err := tcache.CacheGet(tid)
		if err == nil {
			user, err := users.Get(topic.CreatedBy)
			if err != nil {
				return TopicUser{ID: tid}, err
			}

			// We might be better off just passing seperate topic and user structs to the caller?
			return copyTopicToTopicUser(topic, user), nil
		} else if ucache.GetLength() < ucache.GetCapacity() {
			topic, err = topics.Get(tid)
			if err != nil {
				return TopicUser{ID: tid}, err
			}
			user, err := users.Get(topic.CreatedBy)
			if err != nil {
				return TopicUser{ID: tid}, err
			}
			return copyTopicToTopicUser(topic, user), nil
		}
	}

	tu := TopicUser{ID: tid}
	err := getTopicUserStmt.QueryRow(tid).Scan(&tu.Title, &tu.Content, &tu.CreatedBy, &tu.CreatedAt, &tu.IsClosed, &tu.Sticky, &tu.ParentID, &tu.IPAddress, &tu.PostCount, &tu.LikeCount, &tu.CreatedByName, &tu.Avatar, &tu.Group, &tu.URLPrefix, &tu.URLName, &tu.Level)
	tu.Link = buildTopicURL(nameToSlug(tu.Title), tu.ID)
	tu.UserLink = buildProfileURL(nameToSlug(tu.CreatedByName), tu.CreatedBy)
	tu.Tag = gstore.DirtyGet(tu.Group).Tag

	if tok {
		theTopic := Topic{ID: tu.ID, Link: tu.Link, Title: tu.Title, Content: tu.Content, CreatedBy: tu.CreatedBy, IsClosed: tu.IsClosed, Sticky: tu.Sticky, CreatedAt: tu.CreatedAt, LastReplyAt: tu.LastReplyAt, ParentID: tu.ParentID, IPAddress: tu.IPAddress, PostCount: tu.PostCount, LikeCount: tu.LikeCount}
		//log.Printf("the_topic: %+v\n", theTopic)
		_ = tcache.CacheAdd(&theTopic)
	}
	return tu, err
}

func copyTopicToTopicUser(topic *Topic, user *User) (tu TopicUser) {
	tu.UserLink = user.Link
	tu.CreatedByName = user.Name
	tu.Group = user.Group
	tu.Avatar = user.Avatar
	tu.URLPrefix = user.URLPrefix
	tu.URLName = user.URLName
	tu.Level = user.Level

	tu.ID = topic.ID
	tu.Link = topic.Link
	tu.Title = topic.Title
	tu.Content = topic.Content
	tu.CreatedBy = topic.CreatedBy
	tu.IsClosed = topic.IsClosed
	tu.Sticky = topic.Sticky
	tu.CreatedAt = topic.CreatedAt
	tu.LastReplyAt = topic.LastReplyAt
	tu.ParentID = topic.ParentID
	tu.IPAddress = topic.IPAddress
	tu.PostCount = topic.PostCount
	tu.LikeCount = topic.LikeCount
	tu.Data = topic.Data

	return tu
}

// For use in tests and for generating blank topics for forums which don't have a last poster
func getDummyTopic() *Topic {
	return &Topic{ID: 0, Title: ""}
}

func getTopicByReply(rid int) (*Topic, error) {
	topic := Topic{ID: 0}
	err := getTopicByReplyStmt.QueryRow(rid).Scan(&topic.ID, &topic.Title, &topic.Content, &topic.CreatedBy, &topic.CreatedAt, &topic.IsClosed, &topic.Sticky, &topic.ParentID, &topic.IPAddress, &topic.PostCount, &topic.LikeCount, &topic.Data)
	topic.Link = buildTopicURL(nameToSlug(topic.Title), topic.ID)
	return &topic, err
}

func buildTopicURL(slug string, tid int) string {
	if slug == "" {
		return "/topic/" + strconv.Itoa(tid)
	}
	return "/topic/" + slug + "." + strconv.Itoa(tid)
}

// I don't care if it isn't used,, it will likely be in the future. Nolint.
// nolint
func getTopicURLPrefix() string {
	return "/topic/"
}