import {LayoutConfigJson} from "../Models/ThemeConfig/Json/LayoutConfigJson";
import {LayerConfigJson} from "../Models/ThemeConfig/Json/LayerConfigJson";
import {existsSync, mkdirSync, readFileSync, writeFileSync} from "fs";

function main(args: string[]){
    if(args.length === 0){
        console.log("Extracts an inline layer from a theme and places it in it's own layer directory.")
        console.log("USAGE: ts-node scripts/extractLayerFromTheme.ts <themeid> <layerid>")
        console.log("(Invoke with only the themename to see which layers can be extracted)")
        return
    }
    const themeId = args[0]
    const layerId = args[1]

    const themePath = "./assets/themes/"+themeId+"/"+themeId+".json"
    const contents = <LayoutConfigJson> JSON.parse(readFileSync(themePath, "UTF-8"))
    const layers = <LayerConfigJson[]> contents.layers.filter(l => {
        if(typeof l === "string"){
            return false
        }
        if(l["override"] !== undefined){
            return false
        }
        return true
    })

    if(layers.length === 0){
        console.log("No layers can be extracted from this theme. The "+contents.layers.length+" layers are already substituted layers")
        return
    }

    const layerConfig = layers.find(l => l.id === layerId)
    if(layerId === undefined || layerConfig === undefined){
        if(layerId !== undefined){
            console.error( "Layer "+layerId+" not found as inline layer")
        }
        console.log("Layers available for extraction are:")
        console.log(layers.map(l => l.id).join("\n"))
        return
    }


    const dir = "./assets/layers/"+layerId
    if(!existsSync(dir)){
        mkdirSync(dir)
    }
    writeFileSync(dir+"/"+layerId+".json", JSON.stringify(layerConfig, null, "  "))

    const index = contents.layers.findIndex(l => l["id"] === layerId)
    contents.layers[index] = layerId
    writeFileSync(themePath, JSON.stringify(contents, null, "  "))
}

main(process.argv.slice(2))