import { processError } from '@vitest/utils/error';
import { toArray } from '@vitest/utils';

function partitionSuiteChildren(suite) {
  let tasksGroup = [];
  const tasksGroups = [];
  for (const c of suite.tasks) {
    if (tasksGroup.length === 0 || c.concurrent === tasksGroup[0].concurrent) {
      tasksGroup.push(c);
    } else {
      tasksGroups.push(tasksGroup);
      tasksGroup = [c];
    }
  }
  if (tasksGroup.length > 0)
    tasksGroups.push(tasksGroup);
  return tasksGroups;
}

function interpretTaskModes(suite, namePattern, onlyMode, parentIsOnly, allowOnly) {
  const suiteIsOnly = parentIsOnly || suite.mode === "only";
  suite.tasks.forEach((t) => {
    const includeTask = suiteIsOnly || t.mode === "only";
    if (onlyMode) {
      if (t.type === "suite" && (includeTask || someTasksAreOnly(t))) {
        if (t.mode === "only") {
          checkAllowOnly(t, allowOnly);
          t.mode = "run";
        }
      } else if (t.mode === "run" && !includeTask) {
        t.mode = "skip";
      } else if (t.mode === "only") {
        checkAllowOnly(t, allowOnly);
        t.mode = "run";
      }
    }
    if (t.type === "test") {
      if (namePattern && !getTaskFullName(t).match(namePattern))
        t.mode = "skip";
    } else if (t.type === "suite") {
      if (t.mode === "skip")
        skipAllTasks(t);
      else
        interpretTaskModes(t, namePattern, onlyMode, includeTask, allowOnly);
    }
  });
  if (suite.mode === "run") {
    if (suite.tasks.length && suite.tasks.every((i) => i.mode !== "run"))
      suite.mode = "skip";
  }
}
function getTaskFullName(task) {
  return `${task.suite ? `${getTaskFullName(task.suite)} ` : ""}${task.name}`;
}
function someTasksAreOnly(suite) {
  return suite.tasks.some((t) => t.mode === "only" || t.type === "suite" && someTasksAreOnly(t));
}
function skipAllTasks(suite) {
  suite.tasks.forEach((t) => {
    if (t.mode === "run") {
      t.mode = "skip";
      if (t.type === "suite")
        skipAllTasks(t);
    }
  });
}
function checkAllowOnly(task, allowOnly) {
  if (allowOnly)
    return;
  const error = processError(new Error("[Vitest] Unexpected .only modifier. Remove it or pass --allowOnly argument to bypass this error"));
  task.result = {
    state: "fail",
    error,
    errors: [error]
  };
}
function generateHash(str) {
  let hash = 0;
  if (str.length === 0)
    return `${hash}`;
  for (let i = 0; i < str.length; i++) {
    const char = str.charCodeAt(i);
    hash = (hash << 5) - hash + char;
    hash = hash & hash;
  }
  return `${hash}`;
}
function calculateSuiteHash(parent) {
  parent.tasks.forEach((t, idx) => {
    t.id = `${parent.id}_${idx}`;
    if (t.type === "suite")
      calculateSuiteHash(t);
  });
}

function createChainable(keys, fn) {
  function create(context) {
    const chain2 = function(...args) {
      return fn.apply(context, args);
    };
    Object.assign(chain2, fn);
    chain2.withContext = () => chain2.bind(context);
    chain2.setContext = (key, value) => {
      context[key] = value;
    };
    chain2.mergeContext = (ctx) => {
      Object.assign(context, ctx);
    };
    for (const key of keys) {
      Object.defineProperty(chain2, key, {
        get() {
          return create({ ...context, [key]: true });
        }
      });
    }
    return chain2;
  }
  const chain = create({});
  chain.fn = fn;
  return chain;
}

function isAtomTest(s) {
  return s.type === "test" || s.type === "custom";
}
function getTests(suite) {
  return toArray(suite).flatMap((s) => isAtomTest(s) ? [s] : s.tasks.flatMap((c) => isAtomTest(c) ? [c] : getTests(c)));
}
function getTasks(tasks = []) {
  return toArray(tasks).flatMap((s) => isAtomTest(s) ? [s] : [s, ...getTasks(s.tasks)]);
}
function getSuites(suite) {
  return toArray(suite).flatMap((s) => s.type === "suite" ? [s, ...getSuites(s.tasks)] : []);
}
function hasTests(suite) {
  return toArray(suite).some((s) => s.tasks.some((c) => isAtomTest(c) || hasTests(c)));
}
function hasFailed(suite) {
  return toArray(suite).some((s) => {
    var _a;
    return ((_a = s.result) == null ? void 0 : _a.state) === "fail" || s.type === "suite" && hasFailed(s.tasks);
  });
}
function getNames(task) {
  const names = [task.name];
  let current = task;
  while ((current == null ? void 0 : current.suite) || (current == null ? void 0 : current.file)) {
    current = current.suite || current.file;
    if (current == null ? void 0 : current.name)
      names.unshift(current.name);
  }
  return names;
}

export { calculateSuiteHash, createChainable, generateHash, getNames, getSuites, getTasks, getTests, hasFailed, hasTests, interpretTaskModes, partitionSuiteChildren, someTasksAreOnly };