package contract

import (
	"time"

	"github.com/google/uuid"
)

// Request Contracts
type CheckPhoneRequest struct {
	PhoneNumber string `json:"phone_number" binding:"required"`
	Password    string `json:"password,omitempty"` // Optional - only required if user exists
}

type RegisterStartRequest struct {
	PhoneNumber string `json:"phone_number" binding:"required"`
	Name        string `json:"name" binding:"required"`
	BirthDate   string `json:"birth_date" binding:"required"`
}

type RegisterVerifyOtpRequest struct {
	RegistrationToken string `json:"registration_token" binding:"required"`
	OtpCode           string `json:"otp_code" binding:"required"`
}

type RegisterSetPasswordRequest struct {
	RegistrationToken string `json:"registration_token" binding:"required"`
	Password          string `json:"password" binding:"required,min=8"`
	ConfirmPassword   string `json:"confirm_password" binding:"required"`
}

type CustomerLoginRequest struct {
	PhoneNumber string `json:"phone_number" binding:"required"`
	Password    string `json:"password" binding:"required"`
}

type ResendOtpRequest struct {
	PhoneNumber string `json:"phone_number" binding:"required"`
	Purpose     string `json:"purpose" binding:"required,oneof=login registration"`
}

// Response Contracts
type CheckPhoneResponse struct {
	Status  string                  `json:"status"`
	Message string                  `json:"message"`
	Data    *CheckPhoneResponseData `json:"data,omitempty"`
}

type CheckPhoneResponseData struct {
	// For NOT_REGISTERED status
	PhoneNumber string `json:"phone_number,omitempty"`

	// For PASSWORD_REQUIRED status
	AccessToken  string            `json:"access_token,omitempty"`
	RefreshToken string            `json:"refresh_token,omitempty"`
	User         *CustomerUserData `json:"user,omitempty"`

	// For OTP_REQUIRED status (if password doesn't exist)
	OtpToken  string `json:"otp_token,omitempty"`
	ExpiresIn int    `json:"expires_in,omitempty"`
}

type RegisterStartResponse struct {
	Status  string                     `json:"status"`
	Message string                     `json:"message"`
	Data    *RegisterStartResponseData `json:"data,omitempty"`
}

type RegisterStartResponseData struct {
	RegistrationToken string `json:"registration_token"`
	OtpToken          string `json:"otp_token"`
	ExpiresIn         int    `json:"expires_in"`
}

type RegisterVerifyOtpResponse struct {
	Status  string                         `json:"status"`
	Message string                         `json:"message"`
	Data    *RegisterVerifyOtpResponseData `json:"data,omitempty"`
}

type RegisterVerifyOtpResponseData struct {
	RegistrationToken string `json:"registration_token"`
}

type RegisterSetPasswordResponse struct {
	Status  string                           `json:"status"`
	Message string                           `json:"message"`
	Data    *RegisterSetPasswordResponseData `json:"data,omitempty"`
}

type RegisterSetPasswordResponseData struct {
	AccessToken  string            `json:"access_token"`
	RefreshToken string            `json:"refresh_token"`
	User         *CustomerUserData `json:"user"`
}

type CustomerUserData struct {
	ID          uuid.UUID `json:"id"`
	Name        string    `json:"name"`
	PhoneNumber string    `json:"phone_number"`
	BirthDate   string    `json:"birth_date"`
}

type CustomerLoginResponse struct {
	Status  string                     `json:"status"`
	Message string                     `json:"message"`
	Data    *CustomerLoginResponseData `json:"data,omitempty"`
}

type CustomerLoginResponseData struct {
	AccessToken  string            `json:"access_token"`
	RefreshToken string            `json:"refresh_token"`
	User         *CustomerUserData `json:"user"`
}

type ResendOtpResponse struct {
	Status  string                 `json:"status"`
	Message string                 `json:"message"`
	Data    *ResendOtpResponseData `json:"data,omitempty"`
}

type ResendOtpResponseData struct {
	OtpToken     string `json:"otp_token"`
	ExpiresIn    int    `json:"expires_in"`
	NextResendIn int    `json:"next_resend_in"` // Seconds until next resend is allowed
}

// Internal structures for OTP and registration tokens
type OtpSession struct {
	Token       string    `json:"token"`
	Code        string    `json:"code"`
	PhoneNumber string    `json:"phone_number"`
	ExpiresAt   time.Time `json:"expires_at"`
	Purpose     string    `json:"purpose"` // "login" or "registration"
}

type RegistrationSession struct {
	Token       string    `json:"token"`
	PhoneNumber string    `json:"phone_number"`
	Name        string    `json:"name"`
	BirthDate   string    `json:"birth_date"`
	ExpiresAt   time.Time `json:"expires_at"`
	Step        string    `json:"step"` // "otp_sent", "otp_verified", "password_set"
}