import ScriptUtils from "./ScriptUtils";
import {Utils} from "../Utils";
import {lstatSync, readdirSync, readFileSync, writeFileSync} from "fs";

Utils.runningFromConsole = true
import LayerConfig from "../Customizations/JSON/LayerConfig";
import {error} from "util";
import * as licenses from "../assets/generated/license_info.json"
import SmallLicense from "../Models/smallLicense";
import LayoutConfig from "../Customizations/JSON/LayoutConfig";
import {LayerConfigJson} from "../Customizations/JSON/LayerConfigJson";
// This scripts scans 'assets/layers/*.json' for layer definition files and 'assets/themes/*.json' for theme definition files.
// It spits out an overview of those to be used to load them


// First, remove the old file. It might be buggy!
writeFileSync("./assets/generated/known_layers_and_themes.json", JSON.stringify({
    "layers": [],
    "themes": []
}))
const layerFiles = ScriptUtils.readDirRecSync("./assets/layers")
    .filter(path => path.indexOf(".json") > 0)
    .filter(path => path.indexOf("license_info.json") < 0)
    .map(path => {
        try {
            const parsed = JSON.parse(readFileSync(path, "UTF8"));
            return parsed
        } catch (e) {
            console.error("Could not parse file ", path, "due to ", e)
        }
    })
const themeFiles: any[] = ScriptUtils.readDirRecSync("./assets/themes")
    .filter(path => path.indexOf(".json") > 0)
    .filter(path => path.indexOf("license_info.json") < 0)
    .map(path => {
        return JSON.parse(readFileSync(path, "UTF8"));
    })
writeFileSync("./assets/generated/known_layers_and_themes.json", JSON.stringify({
    "layers": layerFiles,
    "themes": themeFiles
}))


console.log("Discovered ", layerFiles.length, "layers and ", themeFiles.length, "themes\n")
console.log("   ---------- VALIDATING ---------")
// ------------- VALIDATION --------------
const licensePaths = []
for (const i in licenses) {
    licensePaths.push(licenses[i].path)
}
const knownPaths = new Set<string>(licensePaths)

function validateLayer(layerJson: LayerConfigJson, context?: string): number {
    let errorCount = 0;
    if (layerJson["overpassTags"] !== undefined) {
        errorCount++
        console.error("CRIT! Layer ", layerJson.id, "still uses the old 'overpassTags'-format. Please use 'source: {osmTags: <tags>}' instead")
    }
    try {
        const layer = new LayerConfig(layerJson, "test", true)
        const images = Array.from(layer.ExtractImages())
        const remoteImages = images.filter(img => img.indexOf("http") == 0)
        for (const remoteImage of remoteImages) {
            console.error("Found a remote image:", remoteImage, "in layer", layer.id)
            errorCount++
        }
        for (const image of images) {
            if (!knownPaths.has(image)) {
                console.error("Image with path", image, "not found or not attributed; it is used in", layer.id, context === undefined ? "" : ` in a layer defined in the theme ${context}`)
                errorCount++
            }
        }

    } catch (e) {
        console.error("Layer ", layerJson.id ?? JSON.stringify(layerJson).substring(0, 50), " is invalid: ", e)
        return 1
    }
    return errorCount
}

let layerErrorCount = 0
const knownLayerIds = new Set<string>();
for (const layerFile of layerFiles) {
    knownLayerIds.add(layerFile.id)
    layerErrorCount += validateLayer(layerFile)
}

let themeErrorCount = 0
for (const themeFile of themeFiles) {

    for (const layer of themeFile.layers) {
        if (typeof layer === "string") {
            if (!knownLayerIds.has(layer)) {
                console.error("Unknown layer id: ", layer)
                themeErrorCount++
            }
        } else {
            if (layer.builtin !== undefined) {
                if (!knownLayerIds.has(layer.builtin)) {
                    console.error("Unknown layer id: ", layer.builtin, "(which uses inheritance)")
                    themeErrorCount++
                } 
            } else {
                // layer.builtin contains layer overrides - we can skip those
                layerErrorCount += validateLayer(layer, themeFile.id)
            }
        }
    }

    themeFile.layers = themeFile.layers
        .filter(l => typeof l != "string") // We remove all the builtin layer references as they don't work with ts-node for some weird reason
        .filter(l => l.builtin === undefined)

    try {
        const theme = new LayoutConfig(themeFile, true, "test")
        if (theme.id !== theme.id.toLowerCase()) {
            console.error("Theme ids should be in lowercase, but it is ", theme.id)
        }
    } catch (e) {
        console.error("Could not parse theme", themeFile["id"], "due to", e)
        themeErrorCount++;
    }
}

if (layerErrorCount + themeErrorCount == 0) {
    console.log("All good!")
} else {
    const msg = (`Found ${layerErrorCount} errors in the layers; ${themeErrorCount} errors in the themes`)
    if(process.argv.indexOf("--no-fail") >= 0){
        console.log(msg)
    }else{
        throw msg;
    }
}