// CodeMirror likes mode definitions as maps to bools, but a string of space
// separated words is easier to edit, so we convert our strings into a map here.
function words(str: string) {
  const obj: Record<string, boolean> = {};
  str.split(' ').forEach((word: string) => {
    obj[word] = true;
  });
  return obj;
}

// See the design doc for the list of keywords. http://go/shaders.skia.org
export const keywords = words(
  'const attribute uniform varying break continue ' +
    'discard return for while do if else struct in out inout uniform layout'
);

export const blockKeywords = words(
  'case do else for if switch while struct enum union'
);

export const defKeywords = words('struct enum union');

export const atoms = words('sk_FragCoord true false');

export const builtins = words(
  'radians degrees ' +
    'sin cos tan asin acos atan ' +
    'pow exp log exp2 log2 ' +
    'sqrt inversesqrt ' +
    'abs sign floor ceil fract mod ' +
    'min max clamp saturate ' +
    'mix step smoothstep ' +
    'length distance dot cross normalize ' +
    'faceforward reflect refract ' +
    'matrixCompMult inverse ' +
    'lessThan lessThanEqual greaterThan greaterThanEqual equal notEqual ' +
    'any all not ' +
    'sample unpremul'
);

export const types = words(
  'int long char short double float unsigned ' +
    'signed void bool float float2 float3 float4 ' +
    'float2x2 float3x3 float4x4 ' +
    'half half2 half3 half4 ' +
    'half2x2 half3x3 half4x4 ' +
    'bool bool2 bool3 bool4 ' +
    'int int2 int3 int4 ' +
    'fragmentProcessor shader ' +
    'vec2 vec3 vec4 ' +
    'ivec2 ivec3 ivec4 ' +
    'bvec2 bvec3 bvec4 ' +
    'mat2 mat3 mat4'
);