package gateway

import (
	"git.sxidc.com/go-framework/baize/framework/core/api"
	"git.sxidc.com/go-tools/utils/http_client"
	"time"
)

type RequestCallbackFunc func(c *api.Context, response *http_client.Response, customResultMap map[string]any) error
type GlobalRequestCallbackFunc func(c *api.Context, request BuilderRequest, historyRequests []BuilderRequest, customResultMap map[string]any) error
type ResponseSuccessFunc func(c *api.Context, historyRequests []BuilderRequest, customResultMap map[string]any)
type ResponseErrorFunc func(c *api.Context, err error)

type Builder struct {
	router         api.Router
	httpClient     *http_client.Client
	httpTimeoutSec int64

	params *builderParams
}

func newBuilder(router api.Router, httpClient *http_client.Client) *Builder {
	return &Builder{
		router:     router,
		httpClient: httpClient,
		params:     newBuilderParams(),
	}
}

func (builder *Builder) Url(httpMethod string, relativePath string) *Builder {
	copyBuilder := builder.copy()
	copyBuilder.params.httpMethod = httpMethod
	copyBuilder.params.relativePath = relativePath
	return copyBuilder
}

func (builder *Builder) Post(request *PostRequest, requestCallbackFunc RequestCallbackFunc) *Builder {
	return builder.addRequest(newBuilderRequestItem(request, requestCallbackFunc))
}

func (builder *Builder) Delete(request *DeleteRequest, requestCallbackFunc RequestCallbackFunc) *Builder {
	return builder.addRequest(newBuilderRequestItem(request, requestCallbackFunc))
}

func (builder *Builder) Put(request *PutRequest, requestCallbackFunc RequestCallbackFunc) *Builder {
	return builder.addRequest(newBuilderRequestItem(request, requestCallbackFunc))
}

func (builder *Builder) Get(request *GetRequest, requestCallbackFunc RequestCallbackFunc) *Builder {
	return builder.addRequest(newBuilderRequestItem(request, requestCallbackFunc))
}

func (builder *Builder) GlobalRequestCallbackFunc(globalRequestCallbackFunc GlobalRequestCallbackFunc) *Builder {
	copyBuilder := builder.copy()
	copyBuilder.params.globalRequestCallbackFunc = globalRequestCallbackFunc
	return copyBuilder
}

func (builder *Builder) ResponseSuccessFunc(responseSuccessFunc ResponseSuccessFunc) *Builder {
	copyBuilder := builder.copy()
	copyBuilder.params.responseSuccessFunc = responseSuccessFunc
	return copyBuilder
}

func (builder *Builder) ResponseErrorFunc(responseErrorFunc ResponseErrorFunc) *Builder {
	copyBuilder := builder.copy()
	copyBuilder.params.responseErrorFunc = responseErrorFunc
	return copyBuilder
}

func (builder *Builder) Build(middlewares ...api.Handler) {
	copyBuilder := builder.copy()
	copyBuilder.router.AddRoute(builder.params.httpMethod, builder.params.relativePath, append(middlewares,
		func(c *api.Context) {
			httpRequest := builder.httpClient.NewRequest(http_client.WithNewRequestTimeout(time.Duration(builder.httpTimeoutSec) * time.Second))
			historyRequests := make([]BuilderRequest, 0)
			resultMap := make(map[string]any)

			for _, requestItem := range builder.params.requestItems {
				err := requestItem.request.Request(httpRequest)
				if err != nil {
					builder.params.responseErrorFunc(c, err)
					return
				}

				if requestItem.requestCallbackFunc != nil {
					err := requestItem.requestCallbackFunc(c, requestItem.request.Response(), resultMap)
					if err != nil {
						builder.params.responseErrorFunc(c, err)
						return
					}

					continue
				}

				if builder.params.globalRequestCallbackFunc != nil {
					err := builder.params.globalRequestCallbackFunc(c, requestItem.request, historyRequests, resultMap)
					if err != nil {
						builder.params.responseErrorFunc(c, err)
						return
					}

					continue
				}

				historyRequests = append(historyRequests, requestItem.request)
			}

			builder.params.responseSuccessFunc(c, historyRequests, resultMap)
		})...)
}

func (builder *Builder) addRequest(item *builderRequestItem) *Builder {
	copyBuilder := builder.copy()
	copyBuilder.params.requestItems = append(copyBuilder.params.requestItems, item)
	return copyBuilder
}

func (builder *Builder) copy() *Builder {
	copyBuilder := newBuilder(builder.router, builder.httpClient)
	copyBuilder.params = builder.params.copy()
	return copyBuilder
}