package agenda

import (
	"errors"
	"nixcn-cms/internal/exception"
	"nixcn-cms/service/service_agenda"
	"nixcn-cms/tracer"
	"nixcn-cms/utils"

	"github.com/gin-gonic/gin"
	"github.com/google/uuid"
)

// Update handles editing an agenda item's name or description.
//
//	@Summary		Update Agenda
//	@Description	Submitter may edit their own pending agendas before the event deadline. Managers may edit any agenda with no restrictions.
//	@Tags			Agenda
//	@Accept			json
//	@Produce		json
//	@Security		Bearer
//	@Param			body	body		service_agenda.AgendaUpdateData	true	"Agenda Update Data"
//	@Success		200		{object}	utils.RespStatus{data=nil}
//	@Failure		400		{object}	utils.RespStatus{data=nil}	"Invalid Input / Not Pending / Deadline Passed"
//	@Failure		403		{object}	utils.RespStatus{data=nil}	"Not Submitter"
//	@Failure		404		{object}	utils.RespStatus{data=nil}	"Agenda Not Found"
//	@Failure		500		{object}	utils.RespStatus{data=nil}	"Internal Server Error"
//	@Router			/agenda/update [patch]
func (self *AgendaHandler) Update(c *gin.Context) {
	ctx, span := tracer.StartSpan(
		c.Request.Context(),
		"api_agenda",
		"update",
	)
	defer span.End()

	ctx = exception.ContextWithEndpoint(ctx, exception.EndpointAgendaUpdate)
	ctx = exception.ContextWithService(ctx, exception.ServiceEndpoint)

	userIdOrig, ok := c.Get("user_id")
	if !ok {
		errorCode := exception.New(
			exception.WithStatus(exception.StatusUser),
			exception.WithType(exception.TypeCommon),
			exception.WithOriginal(exception.CommonErrorMissingUserId),
			exception.WithError(errors.New("Missing UserId")),
		).Throw(ctx).String()
		utils.HttpResponse(c, 403, errorCode)
		return
	}

	userId, err := uuid.Parse(userIdOrig.(string))
	if err != nil {
		errorCode := exception.New(
			exception.WithStatus(exception.StatusServer),
			exception.WithType(exception.TypeCommon),
			exception.WithOriginal(exception.CommonErrorUuidParseFailed),
			exception.WithError(err),
		).Throw(ctx).String()
		utils.HttpResponse(c, 500, errorCode)
		return
	}

	permissionLevelOrig, ok := c.Get("permission_level")
	if !ok {
		errorCode := exception.New(
			exception.WithStatus(exception.StatusUser),
			exception.WithType(exception.TypeCommon),
			exception.WithOriginal(exception.CommonErrorPermissionDenied),
			exception.WithError(errors.New("Missing PermissionLevel")),
		).Throw(ctx).String()
		utils.HttpResponse(c, 403, errorCode)
		return
	}

	data := new(service_agenda.AgendaUpdateData)
	if err := c.ShouldBindJSON(data); err != nil {
		errorCode := exception.New(
			exception.WithStatus(exception.StatusUser),
			exception.WithType(exception.TypeCommon),
			exception.WithOriginal(exception.CommonErrorInvalidInput),
			exception.WithError(err),
		).Throw(ctx).String()
		utils.HttpResponse(c, 400, errorCode)
		return
	}

	if data.AgendaId == uuid.Nil {
		errorCode := exception.New(
			exception.WithStatus(exception.StatusUser),
			exception.WithType(exception.TypeCommon),
			exception.WithOriginal(exception.CommonErrorInvalidInput),
			exception.WithError(errors.New("agenda_id is required")),
		).Throw(ctx).String()
		utils.HttpResponse(c, 400, errorCode)
		return
	}

	data.PermissionLevel = permissionLevelOrig.(uint)

	result := self.svc.Update(&service_agenda.AgendaUpdatePayload{
		Context: ctx,
		UserId:  userId,
		Data:    data,
	})

	if result.Common.Exception.Original != exception.CommonSuccess {
		utils.HttpResponse(c, result.Common.HttpCode, result.Common.Exception.String())
		return
	}

	utils.HttpResponse(c, result.Common.HttpCode, result.Common.Exception.String())
}