package models

import (
	"time"
)

// FacilityType represents different types of facilities
type FacilityType string

const (
	FacilityTypeField     FacilityType = "field"     // Football field, training pitch
	FacilityTypeGym       FacilityType = "gym"       // Indoor gym, fitness area
	FacilityTypeLocker    FacilityType = "locker"    // Locker rooms
	FacilityTypeClassroom FacilityType = "classroom" // Meeting rooms, classrooms
	FacilityTypeStorage   FacilityType = "storage"   // Equipment storage
	FacilityTypeOther     FacilityType = "other"     // Other facilities
)

// FacilityStatus represents the current status of a facility
type FacilityStatus string

const (
	FacilityStatusActive      FacilityStatus = "active"      // Available for booking
	FacilityStatusInactive    FacilityStatus = "inactive"    // Temporarily unavailable
	FacilityStatusMaintenance FacilityStatus = "maintenance" // Under maintenance
	FacilityStatusClosed      FacilityStatus = "closed"      // Permanently closed
)

// Facility represents a physical facility that can be booked
type Facility struct {
	BaseModel
	Name        string         `json:"name" gorm:"not null"`
	Description string         `json:"description"`
	Type        FacilityType   `json:"type" gorm:"type:varchar(20);not null"`
	Status      FacilityStatus `json:"status" gorm:"type:varchar(20);not null;default:'active'"`
	Capacity    int            `json:"capacity"` // Maximum capacity (people)
	Area        float64        `json:"area"`     // Area in square meters
	Location    string         `json:"location"` // Building/room location
	IsIndoor    bool           `json:"is_indoor" gorm:"default:true"`
	IsOutdoor   bool           `json:"is_outdoor" gorm:"default:false"`
	ImageURL    string         `json:"image_url"`

	// Booking settings
	RequiresApproval   bool `json:"requires_approval" gorm:"default:false"`
	MinBookingDuration int  `json:"min_booking_duration"` // Minimum booking duration in minutes
	MaxBookingDuration int  `json:"max_booking_duration"` // Maximum booking duration in minutes
	BookingAdvanceDays int  `json:"booking_advance_days"` // How many days in advance users can book

	// Pricing
	PricePerHour float64 `json:"price_per_hour"` // Price per hour for bookings

	// Availability
	AvailabilityRules []FacilityAvailabilityRule `json:"availability_rules" gorm:"constraint:OnDelete:CASCADE"`

	// Relationships
	Bookings    []FacilityBooking     `json:"bookings,omitempty" gorm:"constraint:OnDelete:CASCADE"`
	Equipment   []FacilityEquipment   `json:"equipment,omitempty" gorm:"constraint:OnDelete:CASCADE"`
	Maintenance []FacilityMaintenance `json:"maintenance,omitempty" gorm:"constraint:OnDelete:CASCADE"`
}

// FacilityAvailabilityRule defines when a facility is available for booking
type FacilityAvailabilityRule struct {
	BaseModel
	FacilityID uint     `json:"facility_id" gorm:"index;not null"`
	Facility   Facility `json:"facility" gorm:"foreignKey:FacilityID"`

	DayOfWeek   int    `json:"day_of_week"` // 0=Sunday, 1=Monday, ..., 6=Saturday
	StartTime   string `json:"start_time"`  // HH:MM format
	EndTime     string `json:"end_time"`    // HH:MM format
	IsAvailable bool   `json:"is_available" gorm:"default:true"`

	// Recurring exceptions
	StartDate *time.Time `json:"start_date"`
	EndDate   *time.Time `json:"end_date"`
}

// BookingStatus represents the status of a facility booking
type BookingStatus string

const (
	BookingStatusPending   BookingStatus = "pending"   // Awaiting approval
	BookingStatusConfirmed BookingStatus = "confirmed" // Approved and confirmed
	BookingStatusCancelled BookingStatus = "cancelled" // Cancelled
	BookingStatusCompleted BookingStatus = "completed" // Completed
	BookingStatusNoShow    BookingStatus = "noshow"    // No show
)

// FacilityBooking represents a booking for a facility
type FacilityBooking struct {
	BaseModel
	FacilityID uint     `json:"facility_id" gorm:"index;not null"`
	Facility   Facility `json:"facility" gorm:"foreignKey:FacilityID"`

	UserID uint `json:"user_id" gorm:"index;not null"`
	User   User `json:"user" gorm:"foreignKey:UserID"`

	Title       string        `json:"title" gorm:"not null"`
	Description string        `json:"description"`
	StartTime   time.Time     `json:"start_time" gorm:"not null"`
	EndTime     time.Time     `json:"end_time" gorm:"not null"`
	Status      BookingStatus `json:"status" gorm:"type:varchar(20);not null;default:'pending'"`

	// Pricing
	TotalPrice    float64 `json:"total_price"`
	PaymentStatus string  `json:"payment_status" gorm:"default:'pending'"`

	// Attendance
	ActualStartTime *time.Time `json:"actual_start_time"`
	ActualEndTime   *time.Time `json:"actual_end_time"`
	AttendeesCount  int        `json:"attendees_count"`

	// Notes
	InternalNotes string `json:"internal_notes"` // Admin-only notes
	PublicNotes   string `json:"public_notes"`   // Visible to booker

	// Cancellation
	CancelledAt  *time.Time `json:"cancelled_at"`
	CancelledBy  *uint      `json:"cancelled_by"`
	CancelReason string     `json:"cancel_reason"`
}

// EquipmentStatus represents the status of equipment
type EquipmentStatus string

const (
	EquipmentStatusAvailable   EquipmentStatus = "available"
	EquipmentStatusInUse       EquipmentStatus = "in_use"
	EquipmentStatusMaintenance EquipmentStatus = "maintenance"
	EquipmentStatusDamaged     EquipmentStatus = "damaged"
	EquipmentStatusLost        EquipmentStatus = "lost"
	EquipmentStatusRetired     EquipmentStatus = "retired"
)

// FacilityEquipment represents equipment associated with a facility
type FacilityEquipment struct {
	BaseModel
	FacilityID uint     `json:"facility_id" gorm:"index;not null"`
	Facility   Facility `json:"facility" gorm:"foreignKey:FacilityID"`

	Name        string          `json:"name" gorm:"not null"`
	Description string          `json:"description"`
	Category    string          `json:"category"` // e.g., "balls", "cones", "goals", "training aids"
	Status      EquipmentStatus `json:"status" gorm:"type:varchar(20);not null;default:'available'"`
	Quantity    int             `json:"quantity"`  // Total quantity
	Available   int             `json:"available"` // Currently available quantity

	// Purchase info
	PurchaseDate   *time.Time `json:"purchase_date"`
	PurchasePrice  float64    `json:"purchase_price"`
	Supplier       string     `json:"supplier"`
	SerialNumber   string     `json:"serial_number"`
	WarrantyExpiry *time.Time `json:"warranty_expiry"`

	// Maintenance
	LastMaintenanceDate *time.Time `json:"last_maintenance_date"`
	NextMaintenanceDate *time.Time `json:"next_maintenance_date"`

	// Location tracking
	CurrentLocation string `json:"current_location"`

	ImageURL string `json:"image_url"`

	// Usage tracking
	UsageCount int        `json:"usage_count"`
	LastUsedAt *time.Time `json:"last_used_at"`
}

// MaintenanceType represents the type of maintenance
type MaintenanceType string

const (
	MaintenanceTypeRoutine    MaintenanceType = "routine"    // Regular maintenance
	MaintenanceTypeRepair     MaintenanceType = "repair"     // Repair work
	MaintenanceTypeInspection MaintenanceType = "inspection" // Safety inspection
	MaintenanceTypeUpgrade    MaintenanceType = "upgrade"    // Upgrades/improvements
)

// FacilityMaintenance represents maintenance work on facilities
type FacilityMaintenance struct {
	BaseModel
	FacilityID uint     `json:"facility_id" gorm:"index;not null"`
	Facility   Facility `json:"facility" gorm:"foreignKey:FacilityID"`

	Type        MaintenanceType `json:"type" gorm:"type:varchar(20);not null"`
	Title       string          `json:"title" gorm:"not null"`
	Description string          `json:"description"`

	// Scheduling
	ScheduledDate     *time.Time `json:"scheduled_date"`
	EstimatedDuration int        `json:"estimated_duration"` // Duration in minutes
	ActualDuration    int        `json:"actual_duration"`

	// Status
	Status      string     `json:"status" gorm:"default:'scheduled'"`
	StartedAt   *time.Time `json:"started_at"`
	CompletedAt *time.Time `json:"completed_at"`

	// Cost
	EstimatedCost float64 `json:"estimated_cost"`
	ActualCost    float64 `json:"actual_cost"`

	// Personnel
	AssignedTo  string `json:"assigned_to"`
	PerformedBy string `json:"performed_by"`

	// Impact on availability
	IsFacilityUnavailable bool `json:"is_facility_unavailable" gorm:"default:true"`

	// Notes
	InternalNotes string `json:"internal_notes"`
	PublicNotes   string `json:"public_notes"`

	// Related equipment
	EquipmentAffected []string `json:"equipment_affected" gorm:"type:text"` // JSON array of equipment names
}

// WeatherCondition represents weather conditions for outdoor activities
type WeatherCondition struct {
	BaseModel
	FacilityID uint     `json:"facility_id" gorm:"index;not null"`
	Facility   Facility `json:"facility" gorm:"foreignKey:FacilityID"`

	DateTime        time.Time `json:"date_time" gorm:"not null"`
	Temperature     float64   `json:"temperature"`     // Celsius
	Humidity        float64   `json:"humidity"`        // Percentage
	Precipitation   float64   `json:"precipitation"`   // mm
	WindSpeed       float64   `json:"wind_speed"`      // km/h
	WindDirection   int       `json:"wind_direction"`  // Degrees
	WeatherCode     string    `json:"weather_code"`    // OpenWeatherMap condition code
	Description     string    `json:"description"`     // Weather description
	IsSuitable      bool      `json:"is_suitable"`     // Suitable for outdoor activities
	Recommendations string    `json:"recommendations"` // Activity recommendations
}

// FacilityBookingTemplate represents reusable booking templates
type FacilityBookingTemplate struct {
	BaseModel
	FacilityID uint     `json:"facility_id" gorm:"index;not null"`
	Facility   Facility `json:"facility" gorm:"foreignKey:FacilityID"`

	Name        string `json:"name" gorm:"not null"`
	Description string `json:"description"`

	// Default booking settings
	Duration         int     `json:"duration"`       // Duration in minutes
	PricePerHour     float64 `json:"price_per_hour"` // Override facility price if set
	RequiresApproval bool    `json:"requires_approval"`

	// Recurrence pattern for regular bookings
	IsRecurring       bool   `json:"is_recurring"`
	RecurrencePattern string `json:"recurrence_pattern"` // JSON: daily, weekly, monthly

	// Default settings
	DefaultTitle       string `json:"default_title"`
	DefaultDescription string `json:"default_description"`
	DefaultAttendees   int    `json:"default_attendees"`

	IsActive bool `json:"is_active" gorm:"default:true"`
}