package main

import "log"
//import "fmt"
import "sync"
import "strconv"
import "database/sql"
import _ "github.com/go-sql-driver/mysql"

type ForumAdmin struct
{
	ID int
	Name string
	Desc string
	Active bool
	Preset string
	TopicCount int
	PresetLang string
}

type Forum struct
{
	ID int
	Name string
	Desc string
	Active bool
	Preset string
	TopicCount int
	LastTopic string
	LastTopicID int
	LastReplyer string
	LastReplyerID int
	LastTopicTime string
}

type ForumSimple struct
{
	ID int
	Name string
	Active bool
	Preset string
}

func LoadForums() error {
	//if debug {
		log.Print("Adding the uncategorised forum")
	//}
	forums = append(forums, Forum{0,"Uncategorised","",uncategorised_forum_visible,"all",0,"",0,"",0,""})

  rows, err := get_forums_stmt.Query()
	if err != nil {
		return err
	}
	defer rows.Close()

	var i int = 1
	for ;rows.Next();i++ {
		forum := Forum{ID:0,Name:"",Active:true,Preset:"all"}
		err = rows.Scan(&forum.ID, &forum.Name, &forum.Desc, &forum.Active, &forum.Preset, &forum.TopicCount, &forum.LastTopic, &forum.LastTopicID, &forum.LastReplyer, &forum.LastReplyerID, &forum.LastTopicTime)
		if err != nil {
			return err
		}

		// Ugh, you really shouldn't physically delete these items, it makes a big mess of things
		if forum.ID != i {
			log.Print("Stop physically deleting forums. You are messing up the IDs. Use the Forum Manager or delete_forum() instead x.x")
			fill_forum_id_gap(i, forum.ID)
		}

		if forum.Name == "" {
			if debug {
				log.Print("Adding a placeholder forum")
			}
		} else {
			log.Print("Adding the " + forum.Name + " forum")
		}
		forums = append(forums,forum)
	}
	err = rows.Err()
	if err != nil {
		return err
	}
	forumCapCount = i
	return nil
}

var forum_update_mutex sync.Mutex
var forum_create_mutex sync.Mutex
func create_forum(forum_name string, forum_desc string, active bool, preset string) (int, error) {
	var fid int
	err := forum_entry_exists_stmt.QueryRow().Scan(&fid)
	if err != nil && err != sql.ErrNoRows {
		return 0, err
	}
	if err != sql.ErrNoRows {
		forum_update_mutex.Lock()
		_, err = update_forum_stmt.Exec(forum_name, forum_desc, active, preset, fid)
		if err != nil {
			return fid, err
		}
		forums[fid].Name = forum_name
		forums[fid].Desc = forum_desc
		forums[fid].Active = active
		forums[fid].Preset = preset
		forum_update_mutex.Unlock()
		return fid, nil
	}

	forum_create_mutex.Lock()
	res, err := create_forum_stmt.Exec(forum_name, forum_desc, active, preset)
	if err != nil {
		return 0, err
	}

	fid64, err := res.LastInsertId()
	if err != nil {
		return 0, err
	}
	fid = int(fid64)

	forums = append(forums, Forum{fid,forum_name,forum_desc,active,preset,0,"",0,"",0,""})
	forum_create_mutex.Unlock()
	return fid, nil
}

func delete_forum(fid int) error {
	forum_update_mutex.Lock()
	_, err := delete_forum_stmt.Exec(fid)
	if err != nil {
		return err
	}
	forums[fid].Name = ""
	forum_update_mutex.Unlock()
	return nil
}

func get_forum(fid int) (forum *Forum, res bool) {
	if !((fid <= forumCapCount) && (fid >= 0) && forums[fid].Name!="") {
		return forum, false
	}
	return &forums[fid], true
}

func get_forum_copy(fid int) (forum Forum, res bool) {
	if !((fid <= forumCapCount) && (fid >= 0) && forums[fid].Name != "") {
		return forum, false
	}
	return forums[fid], true
}

func forum_exists(fid int) bool {
	return (fid <= forumCapCount) && (fid >= 0) && forums[fid].Name != ""
}

func build_forum_url(fid int) string {
	return "/forum/" + strconv.Itoa(fid)
}