package models

import (
	"time"

	"github.com/google/uuid"
)

type ParentAccount struct {
	ID                uuid.UUID `json:"id" db:"id"`
	CreatedByUserID   uuid.UUID `json:"created_by_user_id" db:"created_by_user_id"`
	Email             string    `json:"email" db:"email"`
	PreferredLanguage string    `json:"preferred_language" db:"preferred_language"`
	CreatedAt         time.Time `json:"created_at" db:"created_at"`
}

type ParentChild struct {
	ID         uuid.UUID `json:"id" db:"id"`
	ParentID   uuid.UUID `json:"parent_id" db:"parent_id"`
	TTClassID  uuid.UUID `json:"tt_class_id" db:"tt_class_id"`
	FirstName  string    `json:"first_name" db:"first_name"`
	LastName   string    `json:"last_name" db:"last_name"`
	CreatedAt  time.Time `json:"created_at" db:"created_at"`
	// Joined for display
	ClassName  string    `json:"class_name,omitempty"`
}

// Request DTOs

// InviteParentRequest is what the teacher posts to invite one parent for one
// child. The endpoint creates the account if it doesn't exist, the child
// row, and a fresh magic_link. Same parent can be invited for several
// children (re-using the account).
type InviteParentRequest struct {
	Email             string `json:"email" binding:"required,email"`
	PreferredLanguage string `json:"preferred_language"`
	ChildFirstName    string `json:"child_first_name" binding:"required"`
	ChildLastName     string `json:"child_last_name" binding:"required"`
	TTClassID         string `json:"tt_class_id" binding:"required,uuid"`
}

// InviteParentResponse carries the freshly-minted magic-link path so the
// teacher can copy it into Matrix/Email manually (mass-send comes from the
// notification worker in Phase 9d).
type InviteParentResponse struct {
	Parent     ParentAccount `json:"parent"`
	Child      ParentChild   `json:"child"`
	MagicToken string        `json:"magic_token"`
	MagicURL   string        `json:"magic_url"`
	ExpiresAt  time.Time     `json:"expires_at"`
}

// ParentInviteListItem is the teacher-facing list row — one entry per
// (parent, child) pair, with the joined class name.
type ParentInviteListItem struct {
	ParentID          uuid.UUID `json:"parent_id"`
	Email             string    `json:"email"`
	PreferredLanguage string    `json:"preferred_language"`
	ChildID           uuid.UUID `json:"child_id"`
	ChildFirstName    string    `json:"child_first_name"`
	ChildLastName     string    `json:"child_last_name"`
	ClassID           uuid.UUID `json:"class_id"`
	ClassName         string    `json:"class_name"`
	CreatedAt         time.Time `json:"created_at"`
}

// RedeemMagicLinkRequest is what /parent/auth/redeem expects.
type RedeemMagicLinkRequest struct {
	Token string `json:"token" binding:"required"`
}

// ParentMe is what /parent/me returns: the account + every linked child.
type ParentMe struct {
	Parent   ParentAccount  `json:"parent"`
	Children []ParentChild  `json:"children"`
}