package models

import (
	"time"

	"code.nonshy.com/nonshy/website/pkg/config"
	"code.nonshy.com/nonshy/website/pkg/log"
)

// Functions dealing with quota allowances for user-created forums.

// ComputeForumQuota returns a count of how many user-created forums this user is allowed to own.
//
// The forum quota slowly increases over time and quantity of forum posts written by this user.
func ComputeForumQuota(user *User) int64 {
	var (
		credits  int64
		numPosts = CountCommentsByUser(user, "threads")
	)

	// Get the user's certification date. They get one credit for having a long standing
	// certified status on their account.
	if certSince, err := user.CertifiedSince(); err != nil {
		return 0
	} else if time.Since(certSince) > config.UserForumQuotaCertLifetimeDays {
		credits++
	}

	// Take their number of posts and compute their quota.
	var schedule int64
	for _, schedule = range config.UserForumQuotaCommentCountSchedule {
		if numPosts > schedule {
			credits++
			numPosts -= schedule
		}
	}

	// If they still have posts, repeat the final schedule per credit.
	for numPosts > schedule {
		credits++
		numPosts -= schedule
	}

	return credits
}

// ForumQuotaRemaining computes the amount of additional forums the current user can create.
func (u *User) ForumQuotaRemaining() int64 {
	var (
		quota = ComputeForumQuota(u)
		owned = CountOwnedUserForums(u)
	)
	return quota - owned
}

// CountOwnedUserForums returns the total number of user forums owned by the given user.
func CountOwnedUserForums(user *User) int64 {
	var count int64
	result := DB.Model(&Forum{}).Where(
		"owner_id = ? AND (category='' OR category IS NULL)",
		user.ID,
	).Count(&count)
	if result.Error != nil {
		log.Error("CountOwnedUserForums(%d): %s", user.ID, result.Error)
	}
	return count
}