package v1

import (
	"context"
	"math/big"
	"net/http"

	"github.com/google/uuid"
	"github.com/hay-kot/httpkit/errchain"
	"github.com/sysadminsmedia/homebox/backend/internal/core/services"
	"github.com/sysadminsmedia/homebox/backend/internal/data/repo"
	"github.com/sysadminsmedia/homebox/backend/internal/web/adapters"
)

// HandleLocationTreeQuery godoc
//
//	@Summary	Get Locations Tree
//	@Tags		Locations
//	@Produce	json
//	@Param		withItems	query		bool	false	"include items in response tree"
//	@Success	200			{object}	[]repo.TreeItem
//	@Router		/v1/locations/tree [GET]
//	@Security	Bearer
func (ctrl *V1Controller) HandleLocationTreeQuery() errchain.HandlerFunc {
	fn := func(r *http.Request, query repo.TreeQuery) ([]repo.TreeItem, error) {
		auth := services.NewContext(r.Context())
		return ctrl.repo.Locations.Tree(auth, auth.GID, query)
	}

	return adapters.Query(fn, http.StatusOK)
}

// HandleLocationGetAll godoc
//
//	@Summary	Get All Locations
//	@Tags		Locations
//	@Produce	json
//	@Param		filterChildren	query		bool	false	"Filter locations with parents"
//	@Success	200				{object}	[]repo.LocationOutCount
//	@Router		/v1/locations [GET]
//	@Security	Bearer
func (ctrl *V1Controller) HandleLocationGetAll() errchain.HandlerFunc {
	fn := func(r *http.Request, q repo.LocationQuery) ([]repo.LocationOutCount, error) {
		auth := services.NewContext(r.Context())
		return ctrl.repo.Locations.GetAll(auth, auth.GID, q)
	}

	return adapters.Query(fn, http.StatusOK)
}

// HandleLocationCreate godoc
//
//	@Summary	Create Location
//	@Tags		Locations
//	@Produce	json
//	@Param		payload	body		repo.LocationCreate	true	"Location Data"
//	@Success	200		{object}	repo.LocationSummary
//	@Router		/v1/locations [POST]
//	@Security	Bearer
func (ctrl *V1Controller) HandleLocationCreate() errchain.HandlerFunc {
	fn := func(r *http.Request, createData repo.LocationCreate) (repo.LocationOut, error) {
		auth := services.NewContext(r.Context())
		return ctrl.repo.Locations.Create(auth, auth.GID, createData)
	}

	return adapters.Action(fn, http.StatusCreated)
}

// HandleLocationDelete godoc
//
//	@Summary	Delete Location
//	@Tags		Locations
//	@Produce	json
//	@Param		id	path	string	true	"Location ID"
//	@Success	204
//	@Router		/v1/locations/{id} [DELETE]
//	@Security	Bearer
func (ctrl *V1Controller) HandleLocationDelete() errchain.HandlerFunc {
	fn := func(r *http.Request, ID uuid.UUID) (any, error) {
		auth := services.NewContext(r.Context())
		err := ctrl.repo.Locations.DeleteByGroup(auth, auth.GID, ID)
		return nil, err
	}

	return adapters.CommandID("id", fn, http.StatusNoContent)
}

func (ctrl *V1Controller) GetLocationWithPrice(auth context.Context, gid uuid.UUID, id uuid.UUID) (repo.LocationOut, error) {
	var location, err = ctrl.repo.Locations.GetOneByGroup(auth, gid, id)
	if err != nil {
		return repo.LocationOut{}, err
	}

	// Add direct child items price
	totalPrice := new(big.Int)
	items, err := ctrl.repo.Items.QueryByGroup(auth, gid, repo.ItemQuery{LocationIDs: []uuid.UUID{id}})
	if err != nil {
		return repo.LocationOut{}, err
	}

	for _, item := range items.Items {
		// Skip items with a non-zero SoldTime
		if !item.SoldTime.IsZero() {
			continue
		}

		// Convert item.Quantity to float64 for multiplication
		quantity := float64(item.Quantity)
		itemTotal := big.NewInt(int64(item.PurchasePrice * quantity * 100))
		totalPrice.Add(totalPrice, itemTotal)
	}

	totalPriceFloat := new(big.Float).SetInt(totalPrice)
	totalPriceFloat.Quo(totalPriceFloat, big.NewFloat(100))
	location.TotalPrice, _ = totalPriceFloat.Float64()

	// Add price from child locations
	for _, childLocation := range location.Children {
		var childLocationWithPrice repo.LocationOut
		childLocationWithPrice, err = ctrl.GetLocationWithPrice(auth, gid, childLocation.ID)
		if err != nil {
			return repo.LocationOut{}, err
		}
		location.TotalPrice += childLocationWithPrice.TotalPrice
	}

	return location, nil
}

// HandleLocationGet godoc
//
//	@Summary	Get Location
//	@Tags		Locations
//	@Produce	json
//	@Param		id	path		string	true	"Location ID"
//	@Success	200	{object}	repo.LocationOut
//	@Router		/v1/locations/{id} [GET]
//	@Security	Bearer
func (ctrl *V1Controller) HandleLocationGet() errchain.HandlerFunc {
	fn := func(r *http.Request, ID uuid.UUID) (repo.LocationOut, error) {
		auth := services.NewContext(r.Context())
		var location, err = ctrl.GetLocationWithPrice(auth, auth.GID, ID)

		return location, err
	}

	return adapters.CommandID("id", fn, http.StatusOK)
}

// HandleLocationUpdate godoc
//
//	@Summary	Update Location
//	@Tags		Locations
//	@Produce	json
//	@Param		id		path		string				true	"Location ID"
//	@Param		payload	body		repo.LocationUpdate	true	"Location Data"
//	@Success	200		{object}	repo.LocationOut
//	@Router		/v1/locations/{id} [PUT]
//	@Security	Bearer
func (ctrl *V1Controller) HandleLocationUpdate() errchain.HandlerFunc {
	fn := func(r *http.Request, ID uuid.UUID, body repo.LocationUpdate) (repo.LocationOut, error) {
		auth := services.NewContext(r.Context())
		body.ID = ID
		return ctrl.repo.Locations.UpdateByGroup(auth, auth.GID, ID, body)
	}

	return adapters.ActionID("id", fn, http.StatusOK)
}