package main

import (
	"io/ioutil"
	"fmt"
	"encoding/json"
)

type DatasetType struct {
	Fields FieldsType
}

type FieldsType struct{
	Geo_shape GeoShapeType
}

type GeoShapeType struct {
	Coordinates []float64
}

func convertToMatrix(datasets []DatasetType) [][]float64  {
	var result [][]float64
	for _,dataset := range datasets{
		result = append(result, dataset.Fields.Geo_shape.Coordinates)
	}
	return result
}

func main() {
	file, e := ioutil.ReadFile("/home/laurent/projects/ToulouseLights/points-lumineux.json")
	if e != nil {
		fmt.Printf("File error: %v\n", e)
	}

	var Datasets []DatasetType
	json.Unmarshal(file, &Datasets)

	matrix := convertToMatrix(Datasets)
	result, e := json.Marshal(matrix)
	if e!= nil {
		fmt.Println("Error:", e)
	}
	e = ioutil.WriteFile("/home/laurent/projects/ToulouseLights/data/light-coordinates.json", result, 0644)
	if e!= nil {
		fmt.Println("Error:", e)
	}
}