package api

import (
	"context"
	"net/http"
	"strconv"

	"git.brettb.xyz/goinv/server/internal/types"
	"github.com/go-chi/chi/v5"
	"github.com/go-chi/render"
)

func (s *APIServer) setupAssetRoutes() func(r chi.Router) {
	return func(r chi.Router) {
		r.Get("/", makeHandler(s.getAssets))
		r.Post("/", makeHandler(s.createAsset))

		r.Route("/{assetID}", func(r chi.Router) {
			r.Use(s.AssetCtx)
			r.Get("/", makeHandler(s.getAsset))
			r.Delete("/", makeHandler(s.deleteAsset))
			r.Put("/", makeHandler(s.updateAsset))
		})
	}
}

func (s *APIServer) AssetCtx(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		assetIdStr := chi.URLParam(r, "assetID")
		assetId, err := strconv.Atoi(assetIdStr)
		if err != nil {
			render.Render(w, r, errNotFound)
			return
		}
		asset, err := s.db.GetAssetByID(uint64(assetId))
		if err != nil {
			render.Render(w, r, errNotFound)
			return
		}
		ctx := context.WithValue(r.Context(), "asset", asset)
		next.ServeHTTP(w, r.WithContext(ctx))
	})
}

func (s *APIServer) getAssets(w http.ResponseWriter, r *http.Request) error {
	assets, err := s.db.GetAssets(0, 1000) // TODO: Proper Pagination
	if err != nil {
		return err
	}

	total, err := s.db.TotalAssets()
	if err != nil {
		return err
	}

	return render.Render(w, r, &types.MultipleAssetsResponse{
		Response: &types.Response{
			HTTPStatusCode: http.StatusOK,
		},
		Assets: assets,
		Total:  total,
	})
}

func (s *APIServer) getAsset(w http.ResponseWriter, r *http.Request) error {
	ctx := r.Context()
	asset, ok := ctx.Value("asset").(*types.Asset)
	if !ok {
		return render.Render(w, r, errUnprocessable)
	}

	return render.Render(w, r, &types.AssetResponse{
		Response: &types.Response{
			HTTPStatusCode: http.StatusOK,
		},
		Asset: asset,
	})
}

func (s *APIServer) deleteAsset(w http.ResponseWriter, r *http.Request) error {
	ctx := r.Context()
	asset, ok := ctx.Value("asset").(*types.Asset)
	if !ok {
		return render.Render(w, r, errUnprocessable)
	}

	if ok, _ := s.db.DeleteAssetByID(asset.ID); !ok {
		return render.Render(w, r, errUnprocessable)
	}

	return render.Render(w, r, &types.AssetResponse{Response: &types.Response{HTTPStatusCode: http.StatusOK}, Asset: asset})
}

func (s *APIServer) createAsset(w http.ResponseWriter, r *http.Request) error {
	data := &types.CreateAssetRequest{}
	if err := render.Bind(r, data); err != nil {
		return render.Render(w, r, errBadRequest(err))
	}

	asset := &types.Asset{
		Name:            data.Name,
		Quantity:        data.Quantity,
		Length:          data.Length,
		Manufacturer:    data.Manufacturer,
		ModelName:       data.ModelName,
		Price:           data.Price,
		Comments:        data.Comments,
		ShelfLocationID: data.ShelfLocationID,
		CategoryID:      data.CategoryID,
	}

	err := s.db.CreateAsset(asset)
	if err != nil {
		return err
	}

	return render.Render(w, r, &types.AssetResponse{
		Response: &types.Response{
			HTTPStatusCode: http.StatusOK,
		},
		Asset: asset,
	})
}

func (s *APIServer) updateAsset(w http.ResponseWriter, r *http.Request) error {
	ctx := r.Context()
	eAsset, ok := ctx.Value("asset").(*types.Asset)
	if !ok {
		return render.Render(w, r, errUnprocessable)
	}

	data := &types.CreateAssetRequest{}
	if err := render.Bind(r, data); err != nil {
		return render.Render(w, r, errBadRequest(err))
	}

	asset := &types.Asset{
		ID:              eAsset.ID,
		Name:            data.Name,
		Quantity:        data.Quantity,
		Length:          data.Length,
		Manufacturer:    data.Manufacturer,
		ModelName:       data.ModelName,
		Price:           data.Price,
		Comments:        data.Comments,
		ShelfLocationID: data.ShelfLocationID,
		CategoryID:      data.CategoryID,
	}

	err := s.db.UpdateAsset(eAsset.ID, asset)
	if err != nil {
		return err
	}

	return render.Render(w, r, &types.AssetResponse{
		Response: &types.Response{
			HTTPStatusCode: http.StatusOK,
		},
		Asset: asset,
	})
}