package niri

import (
	"encoding/json"
	"fmt"
)

type WindowLayoutChange struct {
	WindowID     WindowID
	WindowLayout WindowLayout
}

func (m *WindowLayoutChange) UnmarshalJSON(data []byte) error {
	arr := []any{}
	if err := json.Unmarshal(data, &arr); err != nil {
		return err
	}

	if len(arr) != 2 {
		return fmt.Errorf("expected array of length 2 but got array of length %d", len(arr))
	}

	if wid, ok := arr[0].(float64); !ok {
		return fmt.Errorf("expected array element at index 0 to be of type int")
	} else {
		m.WindowID = WindowID(wid)
	}

	if windowLayout, err := reencodeJson[WindowLayout](arr[1]); err != nil {
		return fmt.Errorf("expected array element at index 1 to be of type WindowLayout")
	} else if windowLayout != nil {
		m.WindowLayout = *windowLayout
	}

	return nil
}