package handler

import (
	"net/http"

	"github.com/google/uuid"

	"git.kundeng.us/phoenix/textsender-api/internal/store"
	"git.kundeng.us/phoenix/textsender-models/pkg/message/scheduling"
)

type RequestAddScheduledMessageEvent struct {
	RecipientId        uuid.UUID `json:"recipient_id"`
	MessageId          uuid.UUID `json:"message_id"`
	ScheduledMessageId uuid.UUID `json:"scheduled_message_id"`
}

type AddScheduledMessageEventResponse struct {
	Message string                             `json:"message"`
	Data    []scheduling.ScheduledMessageEvent `json:"data"`
}

type ScheduledMessageEventHandler struct {
	ScheduledMessageEventStore store.ScheduledMessageEventStore
}

func NewScheduledMessageEventHandler(str store.ScheduledMessageEventStore) *ScheduledMessageEventHandler {
	return &ScheduledMessageEventHandler{ScheduledMessageEventStore: str}
}

func (s *ScheduledMessageEventHandler) AddScheduledMessageEvent(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
		return
	}

	var req RequestAddScheduledMessageEvent
	if err := ExtractFromRequest(r, &req); err != nil {
		http.Error(w, "Invalid JSON: "+err.Error(), http.StatusBadRequest)
	}
	defer r.Body.Close()

	event := scheduling.ScheduledMessageEvent{RecipientId: req.RecipientId, MessageId: req.MessageId, ScheduledMessageId: req.ScheduledMessageId}

	var statusCode int
	var resp AddScheduledMessageEventResponse

	if event.RecipientId == uuid.Nil {
		statusCode = http.StatusBadRequest
		resp.Message = "Recipient Id is nil"
	} else if event.MessageId == uuid.Nil {
		statusCode = http.StatusBadRequest
		resp.Message = "Message Id is nil"
	} else if event.ScheduledMessageId == uuid.Nil {
		statusCode = http.StatusBadRequest
		resp.Message = "Scheduled Message Id is nil"
	} else {
		ctx := r.Context()

		if exists, err := s.ScheduledMessageEventStore.Exists(ctx, &event); err == nil {
			if exists {
				statusCode = http.StatusBadRequest
				resp.Message = "Event already present"
			} else {
				if err = s.ScheduledMessageEventStore.CreateScheduledMessageEvent(ctx, &event); err == nil {
					statusCode = http.StatusCreated
					resp.Message = "Successful"
					resp.Data = append(resp.Data, event)
				} else {
					statusCode = http.StatusInternalServerError
					resp.Message = err.Error()
				}
			}
		} else {
			statusCode = http.StatusInternalServerError
			resp.Message = err.Error()
		}
	}

	RespondWithJSON(w, statusCode, &resp)
}