package laniakea

import (
	"time"

	"git.scuroneko.dev/scuroneko/laniakea/tgapi"
)

func (bot *Bot[T]) handleUpdate(u *tgapi.Update, ctx *MessageContext) bool {
	handled := false
	for _, plugin := range bot.plugins {
		handler, ok := plugin.handlers[u.Type]
		if !ok {
			continue
		}

		pluginCtx := cloneMsgContext(ctx)
		if plugin.logger != nil {
			pluginCtx.Logger = plugin.logger
		}
		if !plugin.executeMiddlewares(pluginCtx, bot.appData) {
			continue
		}
		startTime := time.Now()
		bot.safeEmitEvent(pluginCtx.Context(), HandlerStartedEvent{
			UpdateID:    u.UpdateID,
			UpdateType:  u.Type,
			Plugin:      plugin.name,
			HandlerKind: HandlerUpdateKind,
			HandlerName: string(u.Type),
			FromID:      pluginCtx.FromID,
			ChatID:      pluginCtx.ChatID,
		})
		err := handler(pluginCtx, bot.appData)
		endEvent := HandlerFinishedEvent{
			UpdateID:    u.UpdateID,
			UpdateType:  u.Type,
			Plugin:      plugin.name,
			HandlerKind: HandlerUpdateKind,
			HandlerName: string(u.Type),
			FromID:      pluginCtx.FromID,
			ChatID:      pluginCtx.ChatID,
			Duration:    time.Since(startTime),
		}
		if err != nil {
			endEvent.Err = err
			endEvent.UserFacing = IsUserError(err)
		}
		bot.safeEmitEvent(pluginCtx.Context(), endEvent)
		if err != nil {
			bot.safeEmitEvent(pluginCtx.Context(), ErrorEvent{
				UpdateID:    u.UpdateID,
				UpdateType:  u.Type,
				Plugin:      plugin.name,
				HandlerKind: HandlerUpdateKind,
				HandlerName: string(u.Type),
				FromID:      pluginCtx.FromID,
				ChatID:      pluginCtx.ChatID,
				Err:         err,
				UserFacing:  IsUserError(err),
			})
			pluginCtx.error(err)
		}
		handled = true
	}
	return handled
}

func (bot *Bot[T]) prepareUpdateCtx(u *tgapi.Update, ctx *MessageContext) {
	var from *tgapi.User
	var chat *tgapi.Chat
	switch u.Type {
	case tgapi.UpdateTypeMessage:
		if u.Message != nil {
			ctx.Msg = u.Message
			if u.Message.Chat != nil {
				chat = u.Message.Chat
			}
			if u.Message.From != nil {
				from = u.Message.From
			}
		}
	case tgapi.UpdateTypeEditedMessage:
		if u.EditedMessage != nil {
			ctx.Msg = u.EditedMessage
			if u.EditedMessage.Chat != nil {
				chat = u.EditedMessage.Chat
			}
			if u.EditedMessage.From != nil {
				from = u.EditedMessage.From
			}
		}
	case tgapi.UpdateTypeChannelPost:
		if u.ChannelPost != nil {
			ctx.Msg = u.ChannelPost
			if u.ChannelPost.Chat != nil {
				chat = u.ChannelPost.Chat
			}
			if u.ChannelPost.From != nil {
				from = u.ChannelPost.From
			}
		}
	case tgapi.UpdateTypeEditedChannelPost:
		if u.EditedChannelPost != nil {
			ctx.Msg = u.EditedChannelPost
			if u.EditedChannelPost.Chat != nil {
				chat = u.EditedChannelPost.Chat
			}
			if u.EditedChannelPost.From != nil {
				from = u.EditedChannelPost.From
			}
		}
	case tgapi.UpdateTypeBusinessMessage:
		if u.BusinessMessage != nil {
			ctx.Msg = u.BusinessMessage
			if u.BusinessMessage.Chat != nil {
				chat = u.BusinessMessage.Chat
			}
			if u.BusinessMessage.From != nil {
				from = u.BusinessMessage.From
			}
		}
	case tgapi.UpdateTypeEditedBusinessMessage:
		if u.EditedBusinessMessage != nil {
			ctx.Msg = u.EditedBusinessMessage
			if u.EditedBusinessMessage.Chat != nil {
				chat = u.EditedBusinessMessage.Chat
			}
			if u.EditedBusinessMessage.From != nil {
				from = u.EditedBusinessMessage.From
			}
		}
	case tgapi.UpdateTypeGuestMessage:
		if u.GuestMessage != nil {
			ctx.Msg = u.GuestMessage
			if u.GuestMessage.Chat != nil {
				chat = u.GuestMessage.Chat
			}
			if u.GuestMessage.From != nil {
				from = u.GuestMessage.From
			}
		}
	case tgapi.UpdateTypeDeletedBusinessMessages:
		if u.DeletedBusinessMessages != nil {
			chat = &u.DeletedBusinessMessages.Chat
		}
	case tgapi.UpdateTypeInlineQuery:
		if u.InlineQuery != nil {
			from = &u.InlineQuery.From
		}
	case tgapi.UpdateTypeChosenInlineResult:
		if u.ChosenInlineResult != nil {
			from = &u.ChosenInlineResult.From
		}
	case tgapi.UpdateTypeCallbackQuery:
		if u.CallbackQuery != nil {
			if u.CallbackQuery.Message != nil {
				ctx.Msg = u.CallbackQuery.Message
				ctx.CallbackMsgID = u.CallbackQuery.Message.MessageID
				if u.CallbackQuery.Message.Chat != nil {
					chat = u.CallbackQuery.Message.Chat
				}
			}
			if u.CallbackQuery.InlineMessageID != nil {
				ctx.InlineMsgID = *u.CallbackQuery.InlineMessageID
			}
			ctx.CallbackQueryID = u.CallbackQuery.ID
			from = &u.CallbackQuery.From
		}
	case tgapi.UpdateTypeShippingQuery:
		if u.ShippingQuery != nil {
			from = &u.ShippingQuery.From
		}
	case tgapi.UpdateTypePreCheckoutQuery:
		if u.PreCheckoutQuery != nil {
			from = &u.PreCheckoutQuery.From
		}
	case tgapi.UpdateTypePurchasedPaidMedia:
		if u.PurchasedPaidMedia != nil {
			from = &u.PurchasedPaidMedia.From
		}
	case tgapi.UpdateTypeMyChatMember:
		if u.MyChatMember != nil {
			from = &u.MyChatMember.From
			chat = &u.MyChatMember.Chat
		}
	case tgapi.UpdateTypeChatMember:
		if u.ChatMember != nil {
			from = &u.ChatMember.From
			chat = &u.ChatMember.Chat
		}
	case tgapi.UpdateTypeChatJoinRequest:
		if u.ChatJoinRequest != nil {
			from = &u.ChatJoinRequest.From
			chat = &u.ChatJoinRequest.Chat

		}
	case tgapi.UpdateTypeBusinessConnection:
		if u.BusinessConnection != nil {
			from = &u.BusinessConnection.User
		}
	case tgapi.UpdateTypePollAnswer:
		if u.PollAnswer != nil {
			if u.PollAnswer.User.ID != 0 {
				from = &u.PollAnswer.User
			} else if u.PollAnswer.VoterChat.ID != 0 {
				chat = &u.PollAnswer.VoterChat
			}
		}
	case tgapi.UpdateTypeMessageReaction:
		if u.MessageReaction != nil {
			from = u.MessageReaction.User
			chat = u.MessageReaction.Chat
		}
	case tgapi.UpdateTypeMessageReactionCount:
		if u.MessageReactionCount != nil {
			chat = u.MessageReactionCount.Chat
		}
	case tgapi.UpdateTypeChatBoost:
		if u.ChatBoost != nil {
			if u.ChatBoost.Boost.Source.User.ID != 0 {
				from = &u.ChatBoost.Boost.Source.User
			}
			chat = &u.ChatBoost.Chat
		}
	case tgapi.UpdateTypeRemovedChatBoost:
		if u.RemovedChatBoost != nil {
			if u.RemovedChatBoost.Source.User.ID != 0 {
				from = &u.RemovedChatBoost.Source.User
			}
			chat = &u.RemovedChatBoost.Chat
		}
	case tgapi.UpdateTypeManagedBot:
		if u.ManagedBot != nil {
			from = &u.ManagedBot.User
		}
	case tgapi.UpdateTypeSubscription:
		if u.Subscription != nil {
			from = &u.Subscription.User
		}
	}
	if ctx.Msg != nil && from == nil {
		from = ctx.Msg.From
	}
	if from != nil {
		ctx.From = from
		ctx.FromID = from.ID
	} else {
		ctx.FromID = 0
	}
	if chat != nil {
		ctx.Chat = chat
		ctx.ChatID = chat.ID
	} else {
		ctx.ChatID = 0
	}
}