package entities

import (
	"time"

	"github.com/google/uuid"
	"gorm.io/gorm"
)

type CampaignType string

const (
	CampaignTypeReward CampaignType = "REWARD"
	CampaignTypePoints CampaignType = "POINTS"
	CampaignTypeTokens CampaignType = "TOKENS"
	CampaignTypeMixed  CampaignType = "MIXED"
)

type RuleType string

const (
	RuleTypeTier     RuleType = "TIER"
	RuleTypeSpend    RuleType = "SPEND"
	RuleTypeProduct  RuleType = "PRODUCT"
	RuleTypeCategory RuleType = "CATEGORY"
	RuleTypeDay      RuleType = "DAY"
	RuleTypeLocation RuleType = "LOCATION"
)

type CampaignRewardType string

const (
	CampaignRewardTypePoints CampaignRewardType = "POINTS"
	CampaignRewardTypeTokens CampaignRewardType = "TOKENS"
	CampaignRewardTypeReward CampaignRewardType = "REWARD"
)

type RewardSubtype string

const (
	RewardSubtypeMultiplier RewardSubtype = "MULTIPLIER"
	RewardSubtypeSpin       RewardSubtype = "SPIN"
	RewardSubtypeBonus      RewardSubtype = "BONUS"
	RewardSubtypePhysical   RewardSubtype = "PHYSICAL"
)

type Campaign struct {
	ID          uuid.UUID    `gorm:"type:uuid;primary_key;default:gen_random_uuid()" json:"id"`
	Name        string       `gorm:"type:varchar(150);not null" json:"name"`
	Description *string      `gorm:"type:text" json:"description,omitempty"`
	Type        CampaignType `gorm:"type:varchar(50);not null" json:"type"`
	StartDate   time.Time    `gorm:"type:timestamp;not null" json:"start_date"`
	EndDate     time.Time    `gorm:"type:timestamp;not null" json:"end_date"`
	IsActive    bool         `gorm:"type:boolean;default:true" json:"is_active"`
	ShowOnApp   bool         `gorm:"type:boolean;default:true" json:"show_on_app"`
	Position    int          `gorm:"type:int;default:0" json:"position"`
	Metadata    *Metadata    `gorm:"type:jsonb" json:"metadata,omitempty"`
	CreatedAt   time.Time    `gorm:"type:timestamp;default:now()" json:"created_at"`
	UpdatedAt   time.Time    `gorm:"type:timestamp;default:now()" json:"updated_at"`

	// Relations
	Rules []CampaignRule `gorm:"foreignKey:CampaignID;constraint:OnDelete:CASCADE" json:"rules,omitempty"`
}

func (Campaign) TableName() string {
	return "campaigns"
}

func (c *Campaign) BeforeCreate(tx *gorm.DB) error {
	if c.ID == uuid.Nil {
		c.ID = uuid.New()
	}
	return nil
}

func (c *Campaign) BeforeUpdate(tx *gorm.DB) error {
	c.UpdatedAt = time.Now()
	return nil
}

type CampaignRule struct {
	ID             uuid.UUID          `gorm:"type:uuid;primary_key;default:gen_random_uuid()" json:"id"`
	CampaignID     uuid.UUID          `gorm:"type:uuid;not null" json:"campaign_id"`
	RuleType       RuleType           `gorm:"type:varchar(50);not null" json:"rule_type"`
	ConditionValue *string            `gorm:"type:varchar(255)" json:"condition_value,omitempty"`
	RewardType     CampaignRewardType `gorm:"type:varchar(50);not null" json:"reward_type"`
	RewardValue    *int64             `gorm:"type:bigint" json:"reward_value,omitempty"`
	RewardSubtype  *RewardSubtype     `gorm:"type:varchar(50)" json:"reward_subtype,omitempty"`
	RewardRefID    *uuid.UUID         `gorm:"type:uuid" json:"reward_ref_id,omitempty"`
	Metadata       *Metadata          `gorm:"type:jsonb" json:"metadata,omitempty"`
	CreatedAt      time.Time          `gorm:"type:timestamp;default:now()" json:"created_at"`
	UpdatedAt      time.Time          `gorm:"type:timestamp;default:now()" json:"updated_at"`

	// Relations
	Campaign Campaign `gorm:"foreignKey:CampaignID" json:"campaign,omitempty"`
}

func (CampaignRule) TableName() string {
	return "campaign_rules"
}

func (cr *CampaignRule) BeforeCreate(tx *gorm.DB) error {
	if cr.ID == uuid.Nil {
		cr.ID = uuid.New()
	}
	return nil
}

func (cr *CampaignRule) BeforeUpdate(tx *gorm.DB) error {
	cr.UpdatedAt = time.Now()
	return nil
}

type ListCampaignsRequest struct {
	Page      int        `form:"page" binding:"min=1"`
	Limit     int        `form:"limit" binding:"min=1,max=100"`
	Search    string     `form:"search"`
	Type      string     `form:"type"`
	IsActive  *bool      `form:"is_active"`
	ShowOnApp *bool      `form:"show_on_app"`
	StartDate *time.Time `form:"start_date"`
	EndDate   *time.Time `form:"end_date"`
}

type ListCampaignRulesRequest struct {
	Page       int    `form:"page" binding:"min=1"`
	Limit      int    `form:"limit" binding:"min=1,max=100"`
	CampaignID string `form:"campaign_id"`
	RuleType   string `form:"rule_type"`
	RewardType string `form:"reward_type"`
}