import { setTestCases, getTestCases } from "../visualUI/functions";
import { generate } from "../visualUI/code_generator";
import { IVProgAssessment } from "../assessment/ivprogAssessment";
import { TestConsole } from "./testConsole";
import { parseLogs } from "./../services/userLog";
import { SemanticAnalyser } from "../processor/semantic/semanticAnalyser";
import { Maybe } from "./maybe";

function parseActivityData (data) {
  let algorithm_in_ilm = null;
  if (data.split('\n::algorithm::')[1]) {
    algorithm_in_ilm = data.split('\n::algorithm::')[1].split('\n::logs::')[0];
    const logs = data.split('\n::algorithm::')[1].split('\n::logs::')[1];
    if (logs != null) {
      parseLogs(logs);
    }
  }
  let content;
  try {
    content = JSON.parse(data.split('\n::algorithm::')[0]);
    content['algorithm_in_ilm'] = algorithm_in_ilm;
  } catch (e) {
    console.error(e);
    return Maybe.none();
  }
  return Maybe.some(content);
}

export function prepareActivityToStudentHelper (ilm_cont) {
  const maybe_content = parseActivityData(ilm_cont);
  return maybe_content.map(content => {
    const testCases = content.testcases;
    setTestCases(testCases);

    let prog_type = null;
    if (content.settings_programming_type) {
      prog_type = content.settings_programming_type[0].value;
    } else {
      prog_type = "visual";
    }

    return {
      settingsProgrammingType: prog_type,
      settingsDataTypes: content.settings_data_types,
      settingsCommands: content.settings_commands,
      settingsFunctions: content.settings_functions,
      algorithmInIlm: content.algorithm_in_ilm,
      settingsFilter: content.settings_filter
    }
  });
}

function compareArray (a, b) {
  for (let i = 0; i < a.length; ++i) {
    const elementA = a[i];
    const elementB = b[i];
    if (elementA != elementB) {
      return false;
    }
  }
  return true;
}

function compareTestcases (original, student) {
  if (original.length != student.length) {
    return false;
  }
  for (let i = 0; i < original.length; ++i) {
    const elementO = original[i];
    const elementS = student[i];
    if(!compareArray(elementO.input, elementS.input)) {
      return false;
    }
    if(!compareArray(elementO.output, elementS.output)) {
      return false;
    }
  }
  return true;
}

export function autoEval (originalData, callback) {
  const code = generate();
  const original = parseActivityData(originalData).getOrElse(undefined);
  if(original == null) {
    alert("iAssign did not provide the original activity data!");
    return callback(null);
  }
  if (code == null) {
    return callback(-1); // @FeedbackConvention Casos de teste vazios
  } else {
    if (!compareTestcases(original.testcases, getTestCases())) {
      return callback(-2); // @FeedbackConvention Casos de teste alterados pelo aluno
    }
    const ast_code = SemanticAnalyser.analyseFromSource(code);
    const autoAssessment = new IVProgAssessment(ast_code, getTestCases(), new TestConsole([]));
    autoAssessment.runTest().then( grade => callback(grade)).catch(err => {
      console.log(err);
      callback(0);
    });
  }
}