import 'mocha';
import { expect } from 'chai';
import { parseFunctionCalls } from '@/application/Parser/Script/Compiler/Function/Call/FunctionCallParser';
import { FunctionCallDataStub } from '@tests/unit/shared/Stubs/FunctionCallDataStub';
import { itEachAbsentObjectValue, itEachAbsentStringValue } from '@tests/unit/shared/TestCases/AbsentTests';

describe('FunctionCallParser', () => {
  describe('parseFunctionCalls', () => {
    describe('throws with missing call data', () => {
      itEachAbsentObjectValue((absentValue) => {
        // arrange
        const expectedError = 'missing call data';
        const call = absentValue;
        // act
        const act = () => parseFunctionCalls(call);
        // assert
        expect(act).to.throw(expectedError);
      });
    });
    it('throws if call is not an object', () => {
      // arrange
      const expectedError = 'called function(s) must be an object';
      const invalidCalls = ['string', 33, false];
      invalidCalls.forEach((invalidCall) => {
        // act
        const act = () => parseFunctionCalls(invalidCall as never);
        // assert
        expect(act).to.throw(expectedError);
      });
    });
    describe('throws if call sequence has undefined call', () => {
      itEachAbsentObjectValue((absentValue) => {
        // arrange
        const expectedError = 'missing call data';
        const data = [
          new FunctionCallDataStub(),
          absentValue,
        ];
        // act
        const act = () => parseFunctionCalls(data);
        // assert
        expect(act).to.throw(expectedError);
      });
    });
    describe('throws if call sequence has undefined function name', () => {
      itEachAbsentStringValue((absentValue) => {
        // arrange
        const expectedError = 'missing function name in function call';
        const data = [
          new FunctionCallDataStub().withName('function-name'),
          new FunctionCallDataStub().withName(absentValue),
        ];
        // act
        const act = () => parseFunctionCalls(data);
        // assert
        expect(act).to.throw(expectedError);
      });
    });
    it('parses single call as expected', () => {
      // arrange
      const expectedFunctionName = 'functionName';
      const expectedParameterName = 'parameterName';
      const expectedArgumentValue = 'argumentValue';
      const data = new FunctionCallDataStub()
        .withName(expectedFunctionName)
        .withParameters({ [expectedParameterName]: expectedArgumentValue });
      // act
      const actual = parseFunctionCalls(data);
      // assert
      expect(actual).to.have.lengthOf(1);
      const call = actual[0];
      expect(call.functionName).to.equal(expectedFunctionName);
      const { args } = call;
      expect(args.getAllParameterNames()).to.have.lengthOf(1);
      expect(args.hasArgument(expectedParameterName)).to.equal(
        true,
        `Does not include expected parameter: "${expectedParameterName}"\n`
          + `But includes: "${args.getAllParameterNames()}"`,
      );
      const argument = args.getArgument(expectedParameterName);
      expect(argument.parameterName).to.equal(expectedParameterName);
      expect(argument.argumentValue).to.equal(expectedArgumentValue);
    });
    it('parses multiple calls as expected', () => {
      // arrange
      const getFunctionName = (index: number) => `functionName${index}`;
      const getParameterName = (index: number) => `parameterName${index}`;
      const getArgumentValue = (index: number) => `argumentValue${index}`;
      const createCall = (index: number) => new FunctionCallDataStub()
        .withName(getFunctionName(index))
        .withParameters({ [getParameterName(index)]: getArgumentValue(index) });
      const calls = [createCall(0), createCall(1), createCall(2), createCall(3)];
      // act
      const actual = parseFunctionCalls(calls);
      // assert
      expect(actual).to.have.lengthOf(calls.length);
      for (let i = 0; i < calls.length; i++) {
        const call = actual[i];
        const expectedParameterName = getParameterName(i);
        const expectedArgumentValue = getArgumentValue(i);
        expect(call.functionName).to.equal(getFunctionName(i));
        expect(call.args.getAllParameterNames()).to.have.lengthOf(1);
        expect(call.args.hasArgument(expectedParameterName)).to.equal(true);
        const argument = call.args.getArgument(expectedParameterName);
        expect(argument.parameterName).to.equal(expectedParameterName);
        expect(argument.argumentValue).to.equal(expectedArgumentValue);
      }
    });
  });
});