package event

import (
	"net/http"
	"strconv"
	"time"

	"github.com/gin-gonic/gin"

	"furtuna-be/internal/common/errors"
	"furtuna-be/internal/entity"
	"furtuna-be/internal/handlers/request"
	"furtuna-be/internal/handlers/response"
	"furtuna-be/internal/services"
)

type Handler struct {
	service services.Event
}

func (h *Handler) Route(group *gin.RouterGroup, jwt gin.HandlerFunc) {
	route := group.Group("/event")

	route.POST("/", jwt, h.Create)
	route.GET("/list", jwt, h.GetAll)
	route.PUT("/:id", jwt, h.Update)
	route.GET("/:id", jwt, h.GetByID)
	route.DELETE("/:id", jwt, h.Delete)
}

func NewHandler(service services.Event) *Handler {
	return &Handler{
		service: service,
	}
}

func (h *Handler) Create(c *gin.Context) {
	var req request.Event
	if err := c.ShouldBindJSON(&req); err != nil {
		response.ErrorWrapper(c, errors.ErrorBadRequest)
		return
	}

	if err := req.Validate(); err != nil {
		response.ErrorWrapper(c, errors.ErrorInvalidRequest)
		return
	}

	res, err := h.service.Create(c.Request.Context(), req.ToEntity())

	if err != nil {
		response.ErrorWrapper(c, err)
		return
	}

	c.JSON(http.StatusOK, response.BaseResponse{
		Success: true,
		Status:  http.StatusOK,
		Data:    h.toEventResponse(res),
	})
}

func (h *Handler) Update(c *gin.Context) {
	id := c.Param("id")

	eventID, err := strconv.ParseInt(id, 10, 64)
	if err != nil {
		response.ErrorWrapper(c, errors.ErrorBadRequest)
		return
	}

	var req request.Event
	if err := c.ShouldBindJSON(&req); err != nil {
		response.ErrorWrapper(c, errors.ErrorBadRequest)
		return
	}

	if err := req.Validate(); err != nil {
		response.ErrorWrapper(c, errors.ErrorBadRequest)
		return
	}

	updatedEvent, err := h.service.Update(c.Request.Context(), eventID, req.ToEntity())
	if err != nil {
		response.ErrorWrapper(c, err)
		return
	}

	c.JSON(http.StatusOK, response.BaseResponse{
		Success: true,
		Status:  http.StatusOK,
		Data:    h.toEventResponse(updatedEvent),
	})
}

func (h *Handler) GetAll(c *gin.Context) {
	var req request.EventParam
	if err := c.ShouldBindQuery(&req); err != nil {
		response.ErrorWrapper(c, errors.ErrorBadRequest)
		return
	}

	events, total, err := h.service.GetAll(c.Request.Context(), req.ToEntity())
	if err != nil {
		response.ErrorWrapper(c, err)
		return
	}

	c.JSON(http.StatusOK, response.BaseResponse{
		Success: true,
		Status:  http.StatusOK,
		Data:    h.toEventResponseList(events, int64(total), req),
	})
}

func (h *Handler) Delete(c *gin.Context) {
	id := c.Param("id")

	// Parse the ID into a uint
	eventID, err := strconv.ParseInt(id, 10, 64)
	if err != nil {
		response.ErrorWrapper(c, errors.ErrorBadRequest)
		return
	}

	err = h.service.Delete(c.Request.Context(), eventID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, response.BaseResponse{
			Success: false,
			Status:  http.StatusInternalServerError,
			Message: err.Error(),
			Data:    nil,
		})
		return
	}

	c.JSON(http.StatusOK, response.BaseResponse{
		Success: true,
		Status:  http.StatusOK,
		Data:    nil,
	})
}

func (h *Handler) GetByID(c *gin.Context) {
	id := c.Param("id")

	// Parse the ID into a uint
	eventID, err := strconv.ParseInt(id, 10, 64)
	if err != nil {
		response.ErrorWrapper(c, errors.ErrorBadRequest)
		return
	}

	res, err := h.service.GetByID(c.Request.Context(), eventID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, response.BaseResponse{
			Success: false,
			Status:  http.StatusInternalServerError,
			Message: err.Error(),
			Data:    nil,
		})
		return
	}

	c.JSON(http.StatusOK, response.BaseResponse{
		Success: true,
		Status:  http.StatusOK,
		Data:    h.toEventResponse(res),
	})
}

func (h *Handler) toEventResponse(resp *entity.Event) response.Event {
	return response.Event{
		ID:          resp.ID,
		Name:        resp.Name,
		Description: resp.Description,
		StartDate:   resp.StartDate.Format("2006-01-02"),
		EndDate:     resp.EndDate.Format("2006-01-02"),
		StartTime:   resp.StartDate.Format("15:04:05"),
		EndTime:     resp.EndDate.Format("15:04:05"),
		Location:    resp.Location,
		Level:       resp.Level,
		Included:    resp.Included,
		Price:       resp.Price,
		Paid:        resp.Paid,
		LocationID:  resp.LocationID,
		CreatedAt:   resp.CreatedAt.Format(time.RFC3339),
		UpdatedAt:   resp.CreatedAt.Format(time.RFC3339),
		Status:      string(resp.Status),
	}
}

func (h *Handler) toEventResponseList(resp []*entity.Event, total int64, req request.EventParam) response.EventList {
	var events []response.Event
	for _, evt := range resp {
		events = append(events, h.toEventResponse(evt))
	}

	return response.EventList{
		Events: events,
		Total:  total,
		Limit:  req.Limit,
		Offset: req.Offset,
	}
}