import Script from "../Script"
import { readFileSync, writeFileSync } from "fs"
import { OsmId } from "../../src/Models/OsmFeature"
import { Utils } from "../../src/Utils"

interface DiffItem {
    /**
     * Velopark-id
     */
    "ref": string,
    "osmid": OsmId,
    "distance": number,
    "diffs": {
        key: string,
        /**
         * The value in OpenStreetMap
         * Might be undefined if OSM doesn't have an appropriate value
         */
        osm?: string,
        velopark: string | number } []
}

export class DiffToCsv extends Script {
    constructor() {
        super("Converts a 'report.diff' to a CSV file for people who prefer LibreOffice Calc (or other Spreadsheet Software)")
    }

    async main(args: string[]): Promise<void> {
        const file = args[0] ?? "report_diff.json"
        const json = <{diffs:DiffItem[], distanceBinds: number[]}> JSON.parse(readFileSync(file, "utf8"))
        const diffs = json.diffs
        const allKeys = Utils.Dedup(diffs.flatMap(item => item.diffs.map(d => d.key)))
        allKeys.sort()

        const header = ["osm_id","velopark_id", "distance",...allKeys.flatMap(k => ["osm:"+k, "velopark:"+k])]
        const lines = [header]
        for (const diffItem of diffs) {
            const line = []
            lines.push(line)
            line.push(diffItem.osmid)
            line.push(diffItem.ref)
            line.push(diffItem.distance)

            const d = diffItem.diffs
            for (const k of allKeys) {
                const found = d.find(i => i.key === k)
                if(!found){
                    line.push("","")
                    continue
                }
                line.push(found.osm, found.velopark)
            }

        }
        const path = "report_diff.csv"
        writeFileSync(path,
            lines.map(l => l.join(",")).join("\n")
            ,"utf8")
        console.log("Written", path)
    }
}

new DiffToCsv().run()