import { LayerExtension } from '@deck.gl/core';

/** Animates a marching-ants border on PathLayer sublayers (alternating white/green dashes). */
export class MarchingAntsExtension extends LayerExtension {
  static extensionName = 'MarchingAntsExtension';
  static defaultProps = {
    marchTime: { type: 'number', value: 0 },
  };

  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  isEnabled(layer: any): boolean {
    return 'pathTesselator' in layer.state;
  }

  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  getShaders(extension: any): any {
    if (!extension.isEnabled(this)) return null;
    return {
      modules: [
        {
          name: 'marchingAnts',
          inject: {
            'fs:#decl': `\
uniform marchingAntsUniforms {
  float marchTime;
} marchingAnts;`,
            'fs:DECKGL_FILTER_COLOR': `\
float marchSegLen = 4.0;
float marchPos = mod(vPathPosition.y - marchingAnts.marchTime, marchSegLen * 2.0);
if (marchPos < marchSegLen) {
  color = vec4(1.0, 1.0, 1.0, color.a);
} else {
  color = vec4(0.114, 0.894, 0.765, color.a);
}`,
          },
          uniformTypes: {
            marchTime: 'f32',
          },
        },
      ],
    };
  }

  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  updateState(_params: any, extension: any): void {
    if (!extension.isEnabled(this)) return;
    // @ts-expect-error setShaderModuleProps exists on Layer
    this.setShaderModuleProps({
      // @ts-expect-error marchTime is a custom prop from this extension
      marchingAnts: { marchTime: this.props.marchTime || 0 },
    });
  }
}