import { type as assertType } from "@heydovetail/assert";
import { Node, Schema } from "prosemirror-model";
import { Mapping, Step, StepMap, StepResult } from "prosemirror-transform";
import { RangeCreateStep } from "./RangeCreateStep";
import { Range } from "./types";

export interface RangeDeleteJson {
  stepType: "range.delete";
  range: Range;
}

export class RangeDeleteStep extends Step {
  constructor(public readonly range: Readonly<Range>) {
    super();
  }

  public apply(doc: Node) {
    return StepResult.ok(doc);
  }

  public getMap() {
    return new StepMap([]);
  }

  public invert() {
    return new RangeCreateStep(this.range);
  }

  public map(mapping: Readonly<Mapping>) {
    return new RangeDeleteStep({
      ...this.range,
      from: mapping.map(this.range.from, 1),
      to: mapping.map(this.range.to, -1)
    });
  }

  public merge() {
    return null;
  }

  public toJSON(): RangeDeleteJson {
    return {
      stepType: "range.delete",
      range: this.range
    };
  }

  public static fromJSON(_: Schema, json: Readonly<RangeDeleteJson>): RangeDeleteStep {
    return new RangeDeleteStep(json.range);
  }
}

Step.jsonID(assertType<RangeDeleteJson["stepType"]>("range.delete"), RangeDeleteStep);