# frozen_string_literal: true

module DiscordInteractions
  class YiffyAPI
    attr_reader :raw

    GREEN_TICK = APIKey::WebhookMethods::GREEN_TICK
    RED_TICK = APIKey::WebhookMethods::RED_TICK

    def initialize(raw)
      @raw = raw
    end

    def [](key)
      @raw[key.to_s]
    end

    # rubocop:disable Metrics/BlockNesting
    # noinspection RubyCaseWithoutElseBlockInspection
    def handle
      return { type: DiscordConstants::InteractionResponseTypes::PONG } if raw["type"] == DiscordConstants::InteractionTypes::PING

      if raw["guild_id"].nil?
        return {
          type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
          data: {
            content: "My commands cannot be used in Direct Messages.",
            **common,
          },
        }
      end
      CurrentUser.user = CurrentUser.user = APIUser.find_or_create_by(id: raw["member"]["user"]["id"])
      CurrentUser.ip_addr = "0.0.0.0"

      case raw["type"]
      when DiscordConstants::InteractionTypes::APPLICATION_COMMAND
        options = DiscordInteractions::InteractionOptions.new(raw["data"]["options"], raw["data"]["resolved"])
        sub = options.get_subcommand
        case raw["data"]["name"]
        when "apikey"
          keys = APIKey.for_owner(raw["member"]["user"]["id"])
          case sub[0]
          when "create"
            if keys.length >= 3
              return {
                type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
                data: {
                  content: "You already have the maximum amount of api keys. Contact a developer if you believe an exception should be made.",
                  **common,
                },
              }
            end

            {
              type: DiscordConstants::InteractionResponseTypes::MODAL,
              data: {
                custom_id:  "apikey-create",
                components: [
                  {
                    type:       DiscordConstants::ComponentTypes::ACTION_ROW,
                    components: [
                      {
                        custom_id:   "apikey-create.name",
                        placeholder: "My Awesome Application",
                        min_length:  3,
                        max_length:  50,
                        label:       "Name",
                        style:       DiscordConstants::TextInputStyles::SHORT,
                        type:        DiscordConstants::ComponentTypes::TEXT_INPUT,
                      },
                    ],
                  },
                  {
                    type:       DiscordConstants::ComponentTypes::ACTION_ROW,
                    components: [
                      {
                        custom_id:   "apikey-create.usage",
                        placeholder: "Showing porn to my friends",
                        min_length:  5,
                        max_length:  400,
                        label:       "Usage",
                        style:       DiscordConstants::TextInputStyles::PARAGRAPH,
                        type:        DiscordConstants::ComponentTypes::TEXT_INPUT,
                      },
                    ],
                  },
                ],
                title:      "Create API Key",
              },
            }
          when "delete"
            key = keys.find { |k| k.encoded == options.get_string("key", required: true) }
            if key.nil? || key.owner_id.to_s != raw["member"]["user"]["id"]
              return {
                type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
                data: {
                  content: "Invalid key specified.",
                  **common,
                },
              }
            end

            if key.disabled?
              return {
                type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
                data: {
                  content: "This key has been disabled by a developer. To have this key deleted or removed, concat a developer.\n\nDisable Reason: **#{key.disabled_reason || '(None)'}**",
                  **common,
                },
              }
            end

            {
              type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
              data: {
                content:    "Are you sure you want to delete the key **#{key.application_name}**? This action cannot be undone.",
                components: [
                  {
                    type:       DiscordConstants::ComponentTypes::ACTION_ROW,
                    components: [
                      {
                        custom_id: "apikey-delete-yes.#{key.encoded}.#{raw['member']['user']['id']}",
                        label:     "Yes",
                        style:     DiscordConstants::ButtonStyles::SUCCESS,
                        type:      DiscordConstants::ComponentTypes::BUTTON,
                      },
                      {
                        custom_id: "apikey-delete-no.#{raw['member']['user']['id']}",
                        label:     "No",
                        style:     DiscordConstants::ButtonStyles::DANGER,
                        type:      DiscordConstants::ComponentTypes::BUTTON,
                      },
                    ],
                  },
                ],
                **common,
              },
            }

          when "list"
            if keys.empty?
              return {
                type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
                data: {
                  content: "You do not have any API keys.",
                  **common,
                },
              }
            end
            text = []

            keys.each_with_index do |apikey, index|
              text.push(
                <<~TEXT,
                  #{index + 1}.)
                  - Key: ||#{apikey.key}||
                  - Application: `#{apikey.application_name}`
                  - Usage: `#{apikey.usage || 'None Specified'}`
                  - Active: #{apikey.active? ? GREEN_TICK : RED_TICK}
                  - Disabled: #{apikey.disabled? ? "#{GREEN_TICK} (Reason: #{apikey.disabled_reason || 'None Specified'})" : RED_TICK}
                  - Unlimited: #{apikey.unlimited? ? GREEN_TICK : RED_TICK}
                  - Services: #{apikey.access_string}
                TEXT
              )
            end

            {
              type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
              data: {
                content: "We found the following api keys:\n\n#{text.join("\n\n")}",
                **common,
              },
            }
          end
        when "apidev"
          unless Websites.config.yiffyapi_administrators.include?(raw["member"]["user"]["id"])
            return {
              type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
              data: {
                content: "You are not allowed to use that.",
                **common,
              },
            }
          end

          case sub[0]
          when "list"
            user_id = options.get_user("user", required: true)["id"]
            keys = APIKey.for_owner(user_id)

            if keys.empty?
              return {
                type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
                data: {
                  content: "That user does not have any API keys.",
                  **common,
                },
              }
            end
            text = []

            keys.each_with_index do |apikey, index|
              text.push(
                <<~TEXT,
                  #{index + 1}.)
                  - Key: ||#{apikey.key}||
                  - Application: `#{apikey.application_name}`
                  - Usage: `#{apikey.usage || 'None Specified'}`
                  - Active: #{apikey.active? ? GREEN_TICK : RED_TICK}
                  - Disabled: #{apikey.disabled? ? "#{GREEN_TICK} (Reason: #{apikey.disabled_reason || 'None Specified'})" : RED_TICK}
                  - Unlimited: #{apikey.unlimited? ? GREEN_TICK : RED_TICK}
                  - Services: #{apikey.access_string}
                TEXT
              )
            end

            {
              type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
              data: {
                content: "We found the following api keys for <@#{user_id}>:\n\n#{text.join("\n\n")}",
                **common,
              },
            }

          when "disable"
            key = options.get_string("key", required: true)
            reason = options.get_string("reason") || "None Provided"
            apikey = APIKey.find_by(key: key)
            if apikey.nil?
              return {
                type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
                data: {
                  content: "I couldn't find that api key.",
                  **common,
                },
              }
            end
            if apikey.disabled?
              return {
                type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
                data: {
                  content: "That api key is already disabled.",
                  **common,
                },
              }
            end

            apikey.update(disabled: true, disabled_reason: reason)

            {
              type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
              data: {
                content: "Api key successfully disabled.",
                **common,
              },
            }

          when "enable"
            key = options.get_string("key", required: true)
            apikey = APIKey.find_by(key: key)
            if apikey.nil?
              return {
                type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
                data: {
                  content: "I couldn't find that api key.",
                  **common,
                },
              }
            end
            unless apikey.disabled?
              return {
                type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
                data: {
                  content: "That api key is not disabled.",
                  **common,
                },
              }
            end

            apikey.update(disabled: false, disabled_reason: nil)

            {
              type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
              data: {
                content: "Api key successfully enabled.",
                **common,
              },
            }
          when "stats"
            key = options.get_string("key")
            ip = options.get_string("ip")
            if key
              apikey = APIKey.find_by(key: key)
              if apikey.nil?
                return {
                  type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
                  data: {
                    content: "I couldn't find that api key.",
                    **common,
                  },
                }
              end
            end

            stats = APIKey.stats(ip: ip, key: key)
            if key.present?
              stats = flatten_hash(stats[:key])
              text = "Stats for **#{apikey.application_name}** (||#{apikey.key}||)\n\n"
            elsif ip.present?
              stats = flatten_hash(stats[:ip])
              text = "Stats for **#{ip}**\n\n"
            else
              stats = flatten_hash(stats[:global])
              text = "Global stats\n\n"
            end

            stats.each do |name, value|
              text += "**#{name}**: #{ActiveSupport::NumberHelper.number_to_delimited(value)}\n"
            end

            {
              type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
              data: {
                content: text,
                **common,
              },
            }
          end
        end
      when DiscordConstants::InteractionTypes::MESSAGE_COMPONENT
        action, *other, user = raw["data"]["custom_id"].split(".")
        if user != raw["member"]["user"]["id"]
          return {
            type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
            data: {
              content: "That is not yours to play with.",
              **common,
            },
          }
        end

        case action
        when "apikey-delete-yes"
          key = APIKey.for_owner(user).find { |k| k.encoded == other[0] }
          if key.nil? || key.owner_id.to_s != user
            return {
              type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
              data: {
                content: "Invalid key specified.",
                **common,
              },
            }
          end

          key.destroy

          {
            type: DiscordConstants::InteractionResponseTypes::UPDATE_MESSAGE,
            data: {
              content:    "Key deleted.",
              components: [],
              **common,
            },
          }
        when "apikey-delete-no"
          {
            type: DiscordConstants::InteractionResponseTypes::UPDATE_MESSAGE,
            data: {
              content:    "Cancelled.",
              components: [],
              **common,
            },
          }
        end
      when DiscordConstants::InteractionTypes::APPLICATION_COMMAND_AUTOCOMPLETE
        options = DiscordInteractions::InteractionOptions.new(raw["data"]["options"], raw["data"]["resolved"])
        sub, = options.get_subcommand
        opt = options.get_focused_option(required: true)
        case raw["data"]["name"]
        when "apikey"
          case sub
          when "delete"
            keys = APIKey.for_owner(raw["member"]["user"]["id"])
            value = opt["value"]
            keys = keys.filter { |k| k.application_name.start_with?(value) }
            {
              type: DiscordConstants::InteractionResponseTypes::APPLICATION_COMMAND_AUTOCOMPLETE_RESULT,
              data: {
                choices: keys.map do |k|
                  {
                    name:  k.application_name,
                    value: k.encoded,
                  }
                end,
              },
            }
          end
        end
      when DiscordConstants::InteractionTypes::MODAL_SUBMIT
        case raw["data"]["custom_id"]
        when "apikey-create"
          name = raw["data"]["components"][0]["components"][0]["value"]
          usage = raw["data"]["components"][1]["components"][0]["value"]
          if name.length < 3 || name.length > 50
            return {
              type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
              data: {
                content:    "Name must be between 3 and 50 characters.",
                components: [],
                **common,
              },
            }
          end

          if usage.length < 5 || usage.length > 400
            return {
              type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
              data: {
                content: "Usage must be between 5 and 400 characters.",
                **common,
              },
            }
          end

          key = APIKey.create(
            owner_id:         raw["member"]["user"]["id"],
            application_name: name,
            usage:            usage,
          )

          if key.errors.present?
            Rails.logger.error("Failed to create apikey for #{raw['member']['user']['id']}: #{key.errors.full_messages.join(', ')}")
            return {
              type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
              data: {
                content: "An error occurred while creating your API key.",
                **common,
              },
            }
          end

          {
            type: DiscordConstants::InteractionResponseTypes::CHANNEL_MESSAGE_WITH_SOURCE,
            data: {
              content: "Your API key: `#{key.key}`. Provide this in the `Authorization` header. You must still provide a unique user agent. If you have any issues, contact a developer.",
              **common,
            },
          }
        end
      end
    end
    # rubocop:enable Metrics/BlockNesting

    private

    def flatten_hash(hash)
      hash.each_with_object({}) do |(k, v), h|
        if v.is_a?(Hash)
          flatten_hash(v).map do |h_k, h_v|
            h["#{k}.#{h_k}".to_sym] = h_v
          end
        else
          h[k] = v
        end
      end
    end

    def common
      {
        flags:            DiscordConstants::MessageFlags::EPHEMERAL,
        allowed_mentions: {
          users:        [],
          roles:        [],
          everyone:     [],
          replied_user: false,
        },
      }
    end
  end
end