// Package models holds the API-facing representations of TravelHub data.
// JSON field names are camelCase so the Angular client can consume them
// without a translation layer.
package models

import (
	"time"

	"github.com/google/uuid"
)

// Tenant is one travel agency using the platform.
type Tenant struct {
	ID        uuid.UUID `json:"id"`
	Slug      string    `json:"slug"`
	Name      string    `json:"name"`
	Status    string    `json:"status"`
	CreatedAt time.Time `json:"createdAt"`
}

// User belongs to exactly one tenant. Email is unique per tenant, not globally,
// so the same person can hold accounts at several agencies.
type User struct {
	ID        uuid.UUID `json:"id"`
	TenantID  uuid.UUID `json:"tenantId"`
	Email     string    `json:"email"`
	FullName  string    `json:"fullName"`
	Role      string    `json:"role"`
	CreatedAt time.Time `json:"createdAt"`

	// PasswordHash never leaves the server.
	PasswordHash string `json:"-"`
}

// Airport is global reference data, shared by every tenant.
type Airport struct {
	ID       uuid.UUID `json:"id"`
	IATACode string    `json:"iataCode"`
	Name     string    `json:"name"`
	City     string    `json:"city"`
	Country  string    `json:"country"`
	Timezone string    `json:"timezone"`
}

// Airline is global reference data, shared by every tenant.
type Airline struct {
	ID       uuid.UUID `json:"id"`
	IATACode string    `json:"iataCode"`
	Name     string    `json:"name"`
	LogoURL  string    `json:"logoUrl,omitempty"`
}

// Flight is tenant-scoped inventory: each agency loads its own fares, so the
// same physical route carries a different price per tenant.
type Flight struct {
	ID              uuid.UUID `json:"id"`
	FlightNumber    string    `json:"flightNumber"`
	Airline         Airline   `json:"airline"`
	Origin          Airport   `json:"origin"`
	Destination     Airport   `json:"destination"`
	DepartureTime   time.Time `json:"departureTime"`
	ArrivalTime     time.Time `json:"arrivalTime"`
	DurationMinutes int       `json:"durationMinutes"`
	Aircraft        string    `json:"aircraft"`
	CabinClass      string    `json:"cabinClass"`
	BasePrice       float64   `json:"basePrice"`
	Currency        string    `json:"currency"`
	SeatsTotal      int       `json:"seatsTotal"`
	SeatsAvailable  int       `json:"seatsAvailable"`
	Status          string    `json:"status"`
}

// Passenger is one traveller on a booking.
type Passenger struct {
	ID             uuid.UUID  `json:"id"`
	FirstName      string     `json:"firstName"`
	LastName       string     `json:"lastName"`
	DateOfBirth    *time.Time `json:"dateOfBirth,omitempty"`
	PassportNumber string     `json:"passportNumber,omitempty"`
	SeatNumber     string     `json:"seatNumber,omitempty"`
}

// Booking is a confirmed sale against a flight, owned by one tenant.
type Booking struct {
	ID               uuid.UUID   `json:"id"`
	BookingReference string      `json:"bookingReference"`
	Flight           Flight      `json:"flight"`
	Passengers       []Passenger `json:"passengers"`
	PassengerCount   int         `json:"passengerCount"`
	TotalAmount      float64     `json:"totalAmount"`
	Currency         string      `json:"currency"`
	Status           string      `json:"status"`
	ContactEmail     string      `json:"contactEmail"`
	ContactPhone     string      `json:"contactPhone,omitempty"`
	BookedBy         string      `json:"bookedBy"`
	CreatedAt        time.Time   `json:"createdAt"`
}

// FlightSearch carries the filters accepted by GET /api/flights.
type FlightSearch struct {
	Origin      string     // IATA code, optional
	Destination string     // IATA code, optional
	DepartDate  *time.Time // matches the whole calendar day, optional
	CabinClass  string     // optional
	Passengers  int        // minimum seats that must still be available
	SortBy      string     // price | duration | departure
	Limit       int
	Offset      int
}

// PassengerInput is one traveller as supplied by the client. Dates arrive as
// YYYY-MM-DD strings and are parsed when the booking is written.
type PassengerInput struct {
	FirstName      string `json:"firstName"`
	LastName       string `json:"lastName"`
	DateOfBirth    string `json:"dateOfBirth"`
	PassportNumber string `json:"passportNumber"`
}

// CreateBookingRequest is the POST /api/bookings payload.
type CreateBookingRequest struct {
	FlightID     uuid.UUID        `json:"flightId"`
	ContactEmail string           `json:"contactEmail"`
	ContactPhone string           `json:"contactPhone"`
	Passengers   []PassengerInput `json:"passengers"`
}

// DashboardStats powers the agency overview screen.
type DashboardStats struct {
	TotalBookings     int       `json:"totalBookings"`
	ConfirmedBookings int       `json:"confirmedBookings"`
	CancelledBookings int       `json:"cancelledBookings"`
	TotalRevenue      float64   `json:"totalRevenue"`
	Currency          string    `json:"currency"`
	FlightsInStock    int       `json:"flightsInStock"`
	SeatsSold         int       `json:"seatsSold"`
	RecentBookings    []Booking `json:"recentBookings"`
	TopRoutes         []struct {
		Route    string  `json:"route"`
		Bookings int     `json:"bookings"`
		Revenue  float64 `json:"revenue"`
	} `json:"topRoutes"`
}