package user

import (
	"encoding/json"
	"testing"
)

func TestUpdateUserForm_UnmarshalJSON_ProfileImage(t *testing.T) {
	t.Run("omitted profile_image is not treated as an update", func(t *testing.T) {
		var form UpdateUserForm
		err := json.Unmarshal([]byte(`{"full_name":"Jane Doe"}`), &form)
		if err != nil {
			t.Fatalf("unmarshal failed: %v", err)
		}
		if form.isProfileImageSet() {
			t.Fatal("expected profile image to be unset when omitted")
		}
	})

	t.Run("null profile_image clears the image", func(t *testing.T) {
		var form UpdateUserForm
		err := json.Unmarshal([]byte(`{"profile_image":null}`), &form)
		if err != nil {
			t.Fatalf("unmarshal failed: %v", err)
		}
		if !form.isProfileImageSet() {
			t.Fatal("expected profile image to be marked as set")
		}
		if form.ProfileImage != nil {
			t.Fatalf("expected nil profile image, got %#v", form.ProfileImage)
		}
	})

	t.Run("profile image url is preserved", func(t *testing.T) {
		var form UpdateUserForm
		err := json.Unmarshal([]byte(`{"profile_image":"https://example.com/avatar.png"}`), &form)
		if err != nil {
			t.Fatalf("unmarshal failed: %v", err)
		}
		if !form.isProfileImageSet() {
			t.Fatal("expected profile image to be marked as set")
		}
		if form.ProfileImage == nil || *form.ProfileImage != "https://example.com/avatar.png" {
			t.Fatalf("unexpected profile image: %#v", form.ProfileImage)
		}
	})
}