// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.

package model

// UnlimitedValue is the sentinel value indicating a limit is disabled/unlimited
const UnlimitedValue = -1

// LimitSource indicates where the effective limits originated from
type LimitSource string

const (
	LimitSourceSystem LimitSource = "system"
	LimitSourceGroup  LimitSource = "group"
	LimitSourceUser   LimitSource = "user"
)

// EffectiveRecapLimits contains resolved limit values for a user.
// These are non-pointer fields because resolution has already happened.
// A value of -1 (UnlimitedValue) means the limit is disabled/unlimited.
type EffectiveRecapLimits struct {
	// Resolved limit values (-1 = unlimited/disabled)
	MaxRecapsPerDay     int `json:"max_recaps_per_day"`
	MaxScheduledRecaps  int `json:"max_scheduled_recaps"`
	MaxChannelsPerRecap int `json:"max_channels_per_recap"`
	MaxPostsPerRecap    int `json:"max_posts_per_recap"`
	MaxTokensPerRecap   int `json:"max_tokens_per_recap"`
	MaxPostsPerDay      int `json:"max_posts_per_day"`
	CooldownMinutes     int `json:"cooldown_minutes"`

	// Source tracking (for debugging/UI display)
	Source   LimitSource `json:"source"`    // Where limits came from
	SourceID string      `json:"source_id"` // Group ID or User ID if overridden, empty for system
}

// RecapLimitStatus contains the current user's limit status for UI display
type RecapLimitStatus struct {
	EffectiveLimits EffectiveRecapLimits `json:"effective_limits"`
	Daily           DailyUsageStatus     `json:"daily"`
	Cooldown        CooldownStatus       `json:"cooldown"`
}

// DailyUsageStatus tracks daily recap usage
type DailyUsageStatus struct {
	Used    int   `json:"used"`
	Limit   int   `json:"limit"`
	ResetAt int64 `json:"reset_at"` // Unix timestamp ms for midnight in user timezone
}

// CooldownStatus tracks cooldown state
type CooldownStatus struct {
	IsActive          bool  `json:"is_active"`
	AvailableAt       int64 `json:"available_at"`        // Unix timestamp ms when cooldown ends
	RetryAfterSeconds int   `json:"retry_after_seconds"` // Seconds until available
}

// IsLimitEnabled returns true if the given limit value is enabled (not unlimited).
// Useful for enforcement code to check if a limit should be enforced.
func IsLimitEnabled(limitValue int) bool {
	return limitValue != UnlimitedValue
}