package facepp

import (
	"encoding/json"
)

type PixelBox struct {
	Left   float64 `json:"left"`
	Top    float64 `json:"top"`
	Width  float64 `json:"width"`
	Height float64 `json:"height"`
}

var MapTypeKeys = map[string][]string{
	"acne":             {"acne", "acne_pustule", "acne_nodule", "acne_mark"},
	"closed_comedones": {"closed_comedones"},
	"brown_spot":       {"brown_spot"},
	"mole":             {"mole"},
}

func ExtractPixelBoxes(result json.RawMessage, keys ...string) ([]PixelBox, error) {
	if len(result) == 0 || string(result) == "null" {
		return nil, nil
	}
	var root map[string]json.RawMessage
	if err := json.Unmarshal(result, &root); err != nil {
		return nil, err
	}

	var out []PixelBox
	for _, key := range keys {
		raw, ok := root[key]
		if !ok {
			continue
		}
		for _, rect := range locatedRectangles(raw) {
			if rect.Width <= 0 || rect.Height <= 0 {
				continue
			}
			out = append(out, PixelBox{
				Left:   rect.Left,
				Top:    rect.Top,
				Width:  rect.Width,
				Height: rect.Height,
			})
		}
	}
	return out, nil
}