# frozen_string_literal: true

class E621Status < ApplicationRecord
  NOTES = {
    0   => "Some internal issue happened while contacting e621.",
    1   => "E621 is currently in maintenance mode.",
    403 => "E621 is likely experiencing some kind of attack right now, so api endpoints may be returning challenges.",
  }.freeze

  STATES = {
    0   => "error",
    1   => "maintenance",
    403 => "partially down",
  }.freeze

  STATUS_MESSAGES = {
    0   => "Internal Error",
    1   => "Maintenance",
    2   => "No Status",
    200 => "OK",
    204 => "No Content",
    400 => "Bad Request",
    401 => "Unauthorized",
    403 => "Forbidden",
    404 => "Not Found",
    405 => "Method Not Allowed",
    406 => "Not Acceptable",
    408 => "Request Timeout",
    410 => "Gone",
    429 => "Too Many Requests",
    500 => "Internal Server Error",
    502 => "Bad Gateway",
    503 => "Service Unavailable",
    504 => "Gateway Timeout",
    520 => "Unknown Cloudflare Error",
    521 => "Web Server Is Down",
    522 => "Connection Timed Out",
    523 => "Origin Is Unreachable",
    524 => "A Timeout Occurred",
    525 => "SSL Handshake Failed",
    526 => "Invalid SSL Certificate",
    527 => "Railgun Error",
    530 => "Site Is Frozen",
  }.freeze

  after_create :send_notifications

  def available
    status >= 200 && status <= 299
  end

  def state
    (STATES[status] || available ? "up" : "down").gsub(/ /, "-")
  end

  def status_message
    STATUS_MESSAGES[status] || "Unknown (#{status})"
  end

  def note
    NOTES[status]
  end

  module ApiMethods
    def method_attributes
      super + %i[available state status_message note]
    end
  end

  module SearchMethods
    def current
      order(id: :desc).first || new(status: 2, created_at: Time.now)
    end

    def history(limit = 100)
      order(id: :desc).limit(limit)
    end

    def combined(limit = 100)
      {
        current: current,
        history: history(limit)[1..],
      }
    end
  end

  include ApiMethods
  extend SearchMethods

  def send_notifications
    E621Webhook.find_each do |webhook|
      webhook.send_update(self)
    end
  end
end