package models

import "time"

// User is the full MongoDB document.
// Fields tagged json:"-" are NEVER serialised over the wire.
type User struct {
	UID          string    `bson:"uid"           json:"uid"`
	Name         string    `bson:"name"          json:"name"`           // user-provided
	Username     string    `bson:"username"      json:"username"`
	Email        string    `bson:"email"         json:"email,omitempty"`
	Bio          string    `bson:"bio"           json:"bio"`            // user-provided, nullable
	ProfilePic   string    `bson:"profile_pic"   json:"profile_pic"`    // user-provided / OAuth avatar
	Status       string    `bson:"status"        json:"status"`         // user-provided, nullable
	Location     string    `bson:"location"      json:"location"`       // user-provided, nullable
	Gender       string    `bson:"gender"        json:"gender"`         // user-provided, nullable
	Timezone     string    `bson:"timezone"      json:"timezone"`       // user-provided / browser

	// Auto-collected — never prompted, always set by server
	SignupType   string    `bson:"signup_type"   json:"signup_type"`    // google|github|email
	Provider     string    `bson:"provider"      json:"provider"`
	ProviderID   string    `bson:"provider_id"   json:"-"`
	OAuthToken   string    `bson:"oauth_token"   json:"-"`
	PasswordHash string    `bson:"password_hash" json:"-"`
	IP           string    `bson:"ip"            json:"-"`              // stored, never returned
	UserAgent    string    `bson:"user_agent"    json:"-"`
	DeviceInfo   string    `bson:"device_info"   json:"-"`              // JSON blob from browser

	CreatedAt    time.Time `bson:"created_at"    json:"created_at"`
	UpdatedAt    time.Time `bson:"updated_at"    json:"updated_at"`
	LastSeen     time.Time `bson:"last_seen"     json:"last_seen"`
}

// Public is the safe subset returned over the data pipe and after login.
type Public struct {
	UID        string    `json:"uid"`
	Name       string    `json:"name"`
	Username   string    `json:"username"`
	Email      string    `json:"email,omitempty"`
	Bio        string    `json:"bio"`
	ProfilePic string    `json:"profile_pic"`
	Status     string    `json:"status"`
	Location   string    `json:"location"`
	Gender     string    `json:"gender"`
	Timezone   string    `json:"timezone"`
	SignupType string    `json:"signup_type"`
	CreatedAt  time.Time `json:"created_at"`
	LastSeen   time.Time `json:"last_seen"`
}

// LoginResult is what the auth pipe sends back on success.
type LoginResult struct {
	UID   string `json:"uid"`
	Token string `json:"token"` // signed JWT (7 days)
	IsNew bool   `json:"is_new"`
	User  Public `json:"user"`
}

func (u User) ToPublic() Public {
	return Public{
		UID:        u.UID,
		Name:       u.Name,
		Username:   u.Username,
		Email:      u.Email,
		Bio:        u.Bio,
		ProfilePic: u.ProfilePic,
		Status:     u.Status,
		Location:   u.Location,
		Gender:     u.Gender,
		Timezone:   u.Timezone,
		SignupType: u.SignupType,
		CreatedAt:  u.CreatedAt,
		LastSeen:   u.LastSeen,
	}
}

// UserData is the struct for user-submitted profile fields.
// All fields are optional — frontend sends nulls for unset fields.
type UserData struct {
	Name       *string `json:"name"`
	Bio        *string `json:"bio"`
	ProfilePic *string `json:"profile_pic"`
	Status     *string `json:"status"`
	Location   *string `json:"location"`
	Gender     *string `json:"gender"`
	Timezone   *string `json:"timezone"`
}

// DeviceInfo is collected by the frontend and sent at login/signup.
type DeviceInfo struct {
	UA       string `json:"ua"`
	Platform string `json:"platform"`
	Screen   string `json:"screen"`
	Lang     string `json:"lang"`
	TZ       string `json:"tz"`
}