// Copyright (C) 2018-2021 by BDE ENS Paris-Saclay
// SPDX-License-Identifier: GPL-3.0-or-later

// When a transaction is performed, lock the interface to prevent spam clicks.
var LOCK = false

/**
 * Refresh the history table on the consumptions page.
 */
function refreshHistory () {
  $('#history').load('/note/consos/ #history')
  $('#most_used').load('/note/consos/ #most_used')
}

$(document).ready(function () {
  // If hash of a category in the URL, then select this category
  // else select the first one
  if (location.hash) {
    $("a[href='" + location.hash + "']").tab('show')
  } else {
    $("a[data-toggle='tab']").first().tab('show')
  }

  // When selecting a category, change URL
  $(document.body).on('click', "a[data-toggle='tab']", function () {
    location.hash = this.getAttribute('href')
  })

  // Switching in double consumptions mode should update the layout
  $('#double_conso').change(function () {
    document.getElementById('consos_list_div').classList.remove('d-none')
    $('#infos_div').attr('class', 'col-sm-5 col-xl-6')

    const note_list_obj = $('#note_list')
    if (buttons.length > 0 && note_list_obj.text().length > 0) {
      $('#consos_list').html(note_list_obj.html())
      note_list_obj.html('')

      buttons.forEach(function (button) {
        document.getElementById(`conso_button_${button.id}`).addEventListener('click', () => {
          if (LOCK) { return }
          removeNote(button, 'conso_button', buttons, 'consos_list')()
        })
      })
    }
  })

  $('#single_conso').change(function () {
    document.getElementById('consos_list_div').classList.add('d-none')
    $('#infos_div').attr('class', 'col-sm-5 col-md-4')

    const consos_list_obj = $('#consos_list')
    if (buttons.length > 0) {
      if (notes_display.length === 0 && consos_list_obj.text().length > 0) {
        $('#note_list').html(consos_list_obj.html())
        consos_list_obj.html('')
        buttons.forEach(function (button) {
          $('#conso_button_' + button.id).click(function () {
            if (LOCK) { return }
            removeNote(button, 'conso_button', buttons, 'note_list')()
          })
        })
      } else {
        buttons.length = 0
        consos_list_obj.html('')
      }
    }
  })

  // Ensure we begin in single consumption. Fix issue with TurboLinks and BootstrapJS
  document.querySelector("label[for='double_conso']").classList.remove('active')

  document.getElementById("consume_all").addEventListener('click', consumeAll)
})

notes = []
notes_display = []
buttons = []

// When the user searches an alias, we update the auto-completion
autoCompleteNote('note', 'note_list', notes, notes_display,
  'alias', 'note', 'user_note', 'profile_pic', function () {
    if (buttons.length > 0 && $('#single_conso').is(':checked')) {
      consumeAll()
      return false
    }
    return true
  })

/**
 * Add a transaction from a button.
 * @param dest Where the money goes
 * @param amount The price of the item
 * @param type The type of the transaction (content type id for RecurrentTransaction)
 * @param category_id The category identifier
 * @param category_name The category name
 * @param template_id The identifier of the button
 * @param template_name The name of  the button
 */
function addConso (dest, amount, type, category_id, category_name, template_id, template_name) {
  var button = null
  buttons.forEach(function (b) {
    if (b.id === template_id) {
      b.quantity += 1
      button = b
    }
  })
  if (button == null) {
    button = {
      id: template_id,
      name: template_name,
      dest: dest,
      quantity: 1,
      amount: amount,
      type: type,
      category_id: category_id,
      category_name: category_name
    }
    buttons.push(button)
  }

  const dc_obj = $('#double_conso')
  if (dc_obj.is(':checked') || notes_display.length === 0) {
    const list = dc_obj.is(':checked') ? 'consos_list' : 'note_list'
    let html = ''
    buttons.forEach(function (button) {
      html += li('conso_button_' + button.id, button.name +
                '<span class="badge badge-dark badge-pill">' + button.quantity + '</span>')
    })
    document.getElementById(list).innerHTML = html

    buttons.forEach((button) => {
      document.getElementById(`conso_button_${button.id}`).addEventListener('click', () => {
        if (LOCK) { return }
        removeNote(button, 'conso_button', buttons, list)()
      })
    })
  } else { consumeAll() }
}

/**
 * Reset the page as its initial state.
 */
function reset () {
  notes_display.length = 0
  notes.length = 0
  buttons.length = 0
  document.getElementById('note_list').innerHTML = ''
  document.getElementById('consos_list').innerHTML = ''
  document.getElementById('note').value = ''
  document.getElementById('note').dataset.originTitle = ''
  $('#note').tooltip('hide')
  document.getElementById('profile_pic').src = '/static/member/img/default_picture.png'
  document.getElementById('profile_pic_link').href = '#'
  refreshHistory()
  refreshBalance()
  LOCK = false
}

/**
 * Apply all transactions: all notes in `notes` buy each item in `buttons`
 */
function consumeAll () {
  if (LOCK) { return }

  LOCK = true

  let error = false

  if (notes_display.length === 0) {
    document.getElementById('note').classList.add('is-invalid')
    $('#note_list').html(li('', '<strong>Ajoutez des émetteurs.</strong>', 'text-danger'))
    error = true
  }

  if (buttons.length === 0) {
    $('#consos_list').html(li('', '<strong>Ajoutez des consommations.</strong>', 'text-danger'))
    error = true
  }

  if (error) {
    LOCK = false
    return
  }

  notes_display.forEach(function (note_display) {
    buttons.forEach(function (button) {
      consume(note_display.note, note_display.name, button.dest, button.quantity * note_display.quantity, button.amount,
        button.name + ' (' + button.category_name + ')', button.type, button.category_id, button.id)
    })
  })
}

/**
 * Create a new transaction from a button through the API.
 * @param source The note that paid the item (type: note)
 * @param source_alias The alias used for the source (type: str)
 * @param dest The note that sold the item (type: int)
 * @param quantity The quantity sold (type: int)
 * @param amount The price of one item, in cents (type: int)
 * @param reason The transaction details (type: str)
 * @param type The type of the transaction (content type id for RecurrentTransaction)
 * @param category The category id of the button (type: int)
 * @param template The button id (type: int)
 */
function consume (source, source_alias, dest, quantity, amount, reason, type, category, template) {
  $.post('/api/note/transaction/transaction/',
    {
      csrfmiddlewaretoken: CSRF_TOKEN,
      quantity: quantity,
      amount: amount,
      reason: reason,
      valid: true,
      polymorphic_ctype: type,
      resourcetype: 'RecurrentTransaction',
      source: source.id,
      source_alias: source_alias,
      destination: dest,
      template: template
    })
    .done(function () {
      if (!isNaN(source.balance)) {
        const newBalance = source.balance - quantity * amount
        if (newBalance <= -5000) {
          addMsg(interpolate(gettext('Warning, the transaction from the note %s succeed, ' +
              'but the emitter note %s is very negative.'), [source_alias, source_alias]), 'danger', 30000)
        } else if (newBalance < 0) {
          addMsg(interpolate(gettext('Warning, the transaction from the note %s succeed, ' +
              'but the emitter note %s is negative.'), [source_alias, source_alias]), 'warning', 30000)
        }
        if (source.membership && source.membership.date_end < new Date().toISOString()) {
          addMsg(interpolate(gettext('Warning, the emitter note %s is no more a BDE member.'), [source_alias]),
              'danger', 30000)
        }
      }
      reset()
    }).fail(function (e) {
      $.post('/api/note/transaction/transaction/',
        {
          csrfmiddlewaretoken: CSRF_TOKEN,
          quantity: quantity,
          amount: amount,
          reason: reason,
          valid: false,
          invalidity_reason: 'Solde insuffisant',
          polymorphic_ctype: type,
          resourcetype: 'RecurrentTransaction',
          source: source,
          source_alias: source_alias,
          destination: dest,
          template: template
        }).done(function () {
        reset()
        addMsg(gettext("The transaction couldn't be validated because of insufficient balance."), 'danger', 10000)
      }).fail(function () {
        reset()
        errMsg(e.responseJSON)
      })
    })
}