const test = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');
const path = require('node:path');
const vm = require('node:vm');

function createClassList() {
  const classes = new Set();

  return {
    add(name) {
      classes.add(name);
    },
    remove(name) {
      classes.delete(name);
    },
    contains(name) {
      return classes.has(name);
    }
  };
}

function createInput(name, value) {
  const listeners = Object.create(null);
  const attributes = Object.create(null);

  return {
    name: name,
    value: value || '',
    dataset: {},
    classList: createClassList(),
    attributes: attributes,
    validityMessage: '',
    addEventListener(type, handler) {
      if (!listeners[type]) {
        listeners[type] = [];
      }
      listeners[type].push(handler);
    },
    dispatchEvent(event) {
      const handlers = listeners[event.type] || [];
      handlers.forEach(function (handler) {
        handler.call(this, event);
      }, this);
    },
    setCustomValidity(message) {
      this.validityMessage = String(message || '');
    },
    setAttribute(name, value) {
      attributes[name] = String(value);
    },
    removeAttribute(name) {
      delete attributes[name];
    }
  };
}

function createRow(startValue, endValue) {
  const startInput = createInput('entry_start_datetime[]', startValue);
  const endInput = createInput('entry_end_datetime[]', endValue);
  const titleInput = createInput('entry_title[]', 'Opening');
  const descriptionInput = createInput('entry_short_description[]', '');
  const idInput = createInput('entry_id[]', '1');
  const removeButton = {
    addEventListener() {}
  };

  const row = {
    startInput: startInput,
    endInput: endInput,
    querySelector(selector) {
      if (selector === '[name="entry_start_datetime[]"]') {
        return startInput;
      }
      if (selector === '[name="entry_end_datetime[]"]') {
        return endInput;
      }
      if (selector === '[name="entry_title[]"]') {
        return titleInput;
      }
      if (selector === '[name="entry_short_description[]"]') {
        return descriptionInput;
      }
      if (selector === '[name="entry_id[]"]') {
        return idInput;
      }
      if (selector === '[data-remove-timetable-entry]') {
        return removeButton;
      }
      return null;
    },
    remove() {
      row.removed = true;
    }
  };

  return row;
}

function formatDateTimeLocalValue(date) {
  function pad(value) {
    return String(value).padStart(2, '0');
  }

  return [
    String(date.getFullYear()).padStart(4, '0'),
    '-',
    pad(date.getMonth() + 1),
    '-',
    pad(date.getDate()),
    'T',
    pad(date.getHours()),
    ':',
    pad(date.getMinutes())
  ].join('');
}

test('timetable group form highlights an end time that is too early', () => {
  const row = createRow('2026-08-07T10:00', '2026-08-07T10:00');
  const body = {
    rows: [row],
    querySelectorAll(selector) {
      return selector === '[data-timetable-entry-row]' ? this.rows.slice() : [];
    },
    appendChild(node) {
      this.rows.push(node);
      return node;
    }
  };
  const addButton = {
    listeners: Object.create(null),
    addEventListener(type, handler) {
      this.listeners[type] = handler;
    },
    click() {
      if (this.listeners.click) {
        this.listeners.click();
      }
    }
  };
  const form = {
    dataset: {},
    addEventListener() {}
  };
  const templateRow = createRow('', '');
  const template = {
    content: {
      cloneNode() {
        return {
          querySelector(selector) {
            return selector === '[data-timetable-entry-row]' ? templateRow : null;
          }
        };
      }
    }
  };

  const sandbox = {
    document: {
      getElementById(id) {
        if (id === 'timetable-group-form') {
          return form;
        }
        if (id === 'timetable-entry-row-template') {
          return template;
        }
        return null;
      },
      querySelector(selector) {
        if (selector === '[data-timetable-entries-body]') {
          return body;
        }
        if (selector === '[data-add-timetable-entry]') {
          return addButton;
        }
        return null;
      }
    },
    window: {},
    Date: Date,
    Number: Number,
    String: String,
    Array: Array,
    Object: Object,
    Math: Math,
    JSON: JSON,
    console: console,
    module: { exports: {} },
    exports: {}
  };
  sandbox.window = sandbox;

  const scriptPath = path.join(__dirname, '..', 'src', 'web', 'public', 'js', 'data-sources', 'timetable-group-form.js');
  const script = fs.readFileSync(scriptPath, 'utf8');
  vm.runInNewContext(script, sandbox, { filename: scriptPath });

  assert.equal(row.endInput.validityMessage, 'End time must be at least 1 minute after the start time.');
  assert.equal(row.endInput.classList.contains('is-invalid'), true);
  assert.equal(row.endInput.attributes['aria-invalid'], 'true');

  row.endInput.value = formatDateTimeLocalValue(new Date(new Date(row.startInput.value).getTime() + 60000));
  row.endInput.dispatchEvent({ type: 'input' });

  assert.equal(row.endInput.validityMessage, '');
  assert.equal(row.endInput.classList.contains('is-invalid'), false);
  assert.equal(Object.prototype.hasOwnProperty.call(row.endInput.attributes, 'aria-invalid'), false);
});