import ts from "typescript";

import { IdentifierFactory } from "../../factories/IdentifierFactory";
import { StatementFactory } from "../../factories/StatementFactory";
import { TypeFactory } from "../../factories/TypeFactory";

import { IProgrammerProps } from "../../transformers/IProgrammerProps";
import { ITypiaContext } from "../../transformers/ITypiaContext";

import { FeatureProgrammer } from "../FeatureProgrammer";
import { ValidateProgrammer } from "../ValidateProgrammer";
import { FunctionProgrammer } from "../helpers/FunctionProgrammer";
import { ProtobufEncodeProgrammer } from "./ProtobufEncodeProgrammer";

export namespace ProtobufValidateEncodeProgrammer {
  export const decompose = (props: {
    context: ITypiaContext;
    modulo: ts.LeftHandSideExpression;
    functor: FunctionProgrammer;
    type: ts.Type;
    name: string | undefined;
  }): FeatureProgrammer.IDecomposed => {
    const validate = ValidateProgrammer.decompose({
      ...props,
      context: {
        ...props.context,
        options: {
          ...props.context.options,
          functional: false,
          numeric: true,
        },
      },
      config: {
        equals: false,
      },
    });
    const encode = ProtobufEncodeProgrammer.decompose(props);
    return {
      functions: {
        ...validate.functions,
        ...encode.functions,
      },
      statements: [
        ...validate.statements,
        ...encode.statements,
        StatementFactory.constant({
          name: "__validate",
          value: validate.arrow,
        }),
        StatementFactory.constant({
          name: "__encode",
          value: encode.arrow,
        }),
      ],
      arrow: ts.factory.createArrowFunction(
        undefined,
        undefined,
        [IdentifierFactory.parameter("input", TypeFactory.keyword("any"))],
        props.context.importer.type({
          file: "typia",
          name: "IValidation",
          arguments: [
            encode.arrow.type ??
              ts.factory.createTypeReferenceNode("Uint8Array"),
          ],
        }),
        undefined,
        ts.factory.createBlock(
          [
            StatementFactory.constant({
              name: "result",
              value: ts.factory.createAsExpression(
                ts.factory.createCallExpression(
                  ts.factory.createIdentifier("__validate"),
                  undefined,
                  [ts.factory.createIdentifier("input")],
                ),
                TypeFactory.keyword("any"),
              ),
            }),
            ts.factory.createIfStatement(
              ts.factory.createIdentifier("result.success"),
              ts.factory.createExpressionStatement(
                ts.factory.createBinaryExpression(
                  ts.factory.createIdentifier("result.data"),
                  ts.SyntaxKind.EqualsToken,
                  ts.factory.createCallExpression(
                    ts.factory.createIdentifier("__encode"),
                    undefined,
                    [ts.factory.createIdentifier("input")],
                  ),
                ),
              ),
            ),
            ts.factory.createReturnStatement(
              ts.factory.createIdentifier("result"),
            ),
          ],
          true,
        ),
      ),
    };
  };

  export const write = (props: IProgrammerProps): ts.CallExpression => {
    const functor: FunctionProgrammer = new FunctionProgrammer(
      props.modulo.getText(),
    );
    const result: FeatureProgrammer.IDecomposed = decompose({
      ...props,
      functor,
    });
    return FeatureProgrammer.writeDecomposed({
      modulo: props.modulo,
      functor,
      result,
    });
  };
}