package handler

import (
	"context"

	"git.ikuban.com/server/kratos-utils/v2/transport/http/reply"
	"git.ikuban.com/server/kratos-utils/v2/transport/middleware"
	"github.com/go-kratos/kratos/v2/transport/http"
	"google.golang.org/grpc"
)

func unaryHandler(srv any, method grpc.MethodDesc, option *middleware.Option) http.HandlerFunc {
	return func(ctx http.Context) error {
		http.SetOperation(ctx, option.Path)

		dec := func(in any) error {
			if err := ctx.Bind(&in); err != nil {
				return err
			}
			if err := ctx.BindQuery(&in); err != nil {
				return err
			}
			// Bind URL path variables
			if err := ctx.BindVars(&in); err != nil {
				return err
			}
			return nil
		}

		httpCtx := ctx
		interceptor := func(ctx context.Context, req any, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (resp any, err error) {
			ctx = middleware.NewOptionContext(ctx, option)
			h := httpCtx.Middleware(func(ctx context.Context, req interface{}) (interface{}, error) {
				return handler(ctx, req)
			})
			return h(ctx, req)
		}

		out, err := method.Handler(srv, ctx, dec, interceptor)
		if err != nil {
			return err
		}
		return ctx.Result(200, reply.WrapReply(out))
	}
}