/**
 * Annotations UI
 *
 * UI компонент для работы с аннотациями ответов.
 */

import appState from '../state/appState.js'
import { getInputValue, setInputValue } from '../utils/dom.utils.js'

/**
 * Инициализировать аннотацию для ответа
 * @param {number} index - Индекс ответа
 */
export function initForAnswer(index) {
  const env = appState.getCurrentEnv()

  if (!env.annotations[index]) {
    env.annotations[index] = {
      overall: { rating: '', comment: '' },
      body_research: { issues: [], comment: '' },
      body_analytical_hub: { issues: [], comment: '' },
      docs_from_vectorstore: { research: {}, analytical_hub: {} },
      docs_to_llm: { research: {}, analytical_hub: {} }
    }
  }
}

/**
 * Загрузить аннотации для ответа
 * @param {number} index - Индекс ответа
 */
export function loadForAnswer(index) {
  initForAnswer(index)

  const env = appState.getCurrentEnv()
  const annotation = env.annotations[index]

  // Load overall rating
  const ratingSelect = document.getElementById('overall-rating')
  const overallComment = document.getElementById('overall-comment')

  if (ratingSelect) {
    ratingSelect.value = annotation.overall.rating || ''
  }

  if (overallComment) {
    setInputValue(overallComment, annotation.overall.comment || '')
  }

  // Load body annotations
  loadSection('body_research', annotation.body_research)
  loadSection('body_analytical_hub', annotation.body_analytical_hub)

  // Load document annotations
  loadDocuments('docs_from_vectorstore', 'research', annotation.docs_from_vectorstore?.research)
  loadDocuments('docs_from_vectorstore', 'analytical_hub', annotation.docs_from_vectorstore?.analytical_hub)
  loadDocuments('docs_to_llm', 'research', annotation.docs_to_llm?.research)
  loadDocuments('docs_to_llm', 'analytical_hub', annotation.docs_to_llm?.analytical_hub)

  // Setup event listeners for current answer
  setupListeners()
}

/**
 * Загрузить аннотацию секции (body)
 * @param {string} section - Название секции
 * @param {object} data - Данные аннотации
 */
export function loadSection(section, data) {
  // Load checkboxes
  document.querySelectorAll(`input[data-section="${section}"]`).forEach(checkbox => {
    if (checkbox.type === 'checkbox') {
      const issue = checkbox.dataset.issue
      checkbox.checked = data.issues.includes(issue)
      updateCheckboxStyle(checkbox)
    }
  })

  // Load comment
  const textarea = document.querySelector(`textarea[data-section="${section}"]:not([data-doc-index])`)
  if (textarea) {
    setInputValue(textarea, data.comment || '')
  }
}

/**
 * Загрузить аннотации документов
 * @param {string} section - Секция (docs_from_vectorstore, docs_to_llm)
 * @param {string} subsection - Подсекция (research, analytical_hub)
 * @param {object} docs - Объект с аннотациями документов
 */
export function loadDocuments(section, subsection, docs) {
  if (!docs) return

  Object.keys(docs).forEach(docIndex => {
    const data = docs[docIndex]

    // Load checkboxes
    document.querySelectorAll(
      `input[data-section="${section}"][data-subsection="${subsection}"][data-doc-index="${docIndex}"]`
    ).forEach(checkbox => {
      if (checkbox.type === 'checkbox') {
        const issue = checkbox.dataset.issue
        checkbox.checked = data.issues?.includes(issue) || false
        updateCheckboxStyle(checkbox)
      }
    })

    // Load comment
    const textarea = document.querySelector(
      `textarea[data-section="${section}"][data-subsection="${subsection}"][data-doc-index="${docIndex}"]`
    )
    if (textarea) {
      setInputValue(textarea, data.comment || '')
    }
  })
}

/**
 * Настроить обработчики событий для аннотаций
 */
export function setupListeners() {
  const env = appState.getCurrentEnv()
  const index = env.currentAnswerIndex

  // Overall rating
  const ratingSelect = document.getElementById('overall-rating')
  const overallComment = document.getElementById('overall-comment')

  if (ratingSelect) {
    ratingSelect.onchange = (e) => {
      env.annotations[index].overall.rating = e.target.value
      saveDraft()
    }
  }

  if (overallComment) {
    overallComment.oninput = (e) => {
      env.annotations[index].overall.comment = getInputValue(e.target)
      saveDraft()
    }
  }

  // Section checkboxes and textareas
  document.querySelectorAll('input.checkbox, textarea').forEach(element => {
    const section = element.dataset.section
    const subsection = element.dataset.subsection
    const docIndex = element.dataset.docIndex

    if (!section) return

    if (element.type === 'checkbox') {
      element.onchange = (e) => {
        const issue = e.target.dataset.issue

        if (docIndex !== undefined) {
          // Document annotation
          if (!env.annotations[index][section]) {
            env.annotations[index][section] = { research: {}, analytical_hub: {} }
          }
          if (!env.annotations[index][section][subsection]) {
            env.annotations[index][section][subsection] = {}
          }
          if (!env.annotations[index][section][subsection][docIndex]) {
            env.annotations[index][section][subsection][docIndex] = { issues: [], comment: '' }
          }

          const issues = env.annotations[index][section][subsection][docIndex].issues

          if (e.target.checked) {
            if (!issues.includes(issue)) issues.push(issue)
          } else {
            const idx = issues.indexOf(issue)
            if (idx > -1) issues.splice(idx, 1)
          }
        } else {
          // Body annotation
          const issues = env.annotations[index][section].issues

          if (e.target.checked) {
            if (!issues.includes(issue)) issues.push(issue)
          } else {
            const idx = issues.indexOf(issue)
            if (idx > -1) issues.splice(idx, 1)
          }
        }

        updateCheckboxStyle(e.target)
        saveDraft()
      }
    } else if (element.tagName === 'TEXTAREA') {
      element.oninput = (e) => {
        const value = getInputValue(e.target)

        if (docIndex !== undefined) {
          // Document annotation
          if (!env.annotations[index][section][subsection][docIndex]) {
            env.annotations[index][section][subsection][docIndex] = { issues: [], comment: '' }
          }
          env.annotations[index][section][subsection][docIndex].comment = value
        } else if (section !== 'overall') {
          // Body annotation
          env.annotations[index][section].comment = value
        }

        saveDraft()
      }
    }
  })
}

/**
 * Обновить стиль чекбокса (добавить checked класс к label)
 * @param {HTMLElement} checkbox - Чекбокс элемент
 */
export function updateCheckboxStyle(checkbox) {
  const label = checkbox.closest('.issue-checkbox')
  if (label) {
    if (checkbox.checked) {
      label.classList.add('checked')
    } else {
      label.classList.remove('checked')
    }
  }
}

/**
 * Сохранить черновик аннотаций в localStorage
 */
export function saveDraft() {
  const currentEnv = appState.getCurrentEnvironment()
  appState.saveEnvironmentToStorage(currentEnv)
}

// Export as default object
export default {
  initForAnswer,
  loadForAnswer,
  loadSection,
  loadDocuments,
  setupListeners,
  updateCheckboxStyle,
  saveDraft
}