import Script from "./Script"
import { Tiles } from "../src/Models/TileRange"

class GeneratePmTilesExtractionScript extends Script {

    constructor() {
        super("Generates a bash script to extract all subpyramids of maxzoom=8 from planet-latest.pmtiles")
    }

    private emitRange(z: number, x: number, y: number, maxzoom?: number): string {
        const [[max_lat, min_lon], [min_lat, max_lon]] = Tiles.tile_bounds(z, x, y)
        let maxzoomflag = ""
        if(maxzoom !== undefined){
            maxzoomflag = " --maxzoom="+maxzoom
        }
        return (`./pmtiles extract planet-latest.pmtiles --minzoom=${z}${maxzoomflag} --bbox=${[min_lon, min_lat + 0.0001, max_lon, max_lat].join(",")} ${z}-${x}-${y}.pmtiles`)
    }

    private generateField(z: number, maxzoom?:number){
        const boundary = 2 << z
        for (let x = 0; x < boundary; x++) {
            const xCommands = []
            for (let y = 0; y < boundary; y++) {
                xCommands.push(this.emitRange(z, x, y,maxzoom))
            }
            console.log(xCommands.join(" && ") + " && echo 'All pyramids for x = " + x + " are generated' & ")
        }

    }

    async main(): Promise<void> {
        this.generateField(0, 4)
        this.generateField(5, 8)
        this.generateField(9)
    }

}

new GeneratePmTilesExtractionScript().run()