package pass_through

import (
	"git.sxidc.com/go-framework/baize/framework/gateway"
	"git.sxidc.com/go-tools/utils/http_client"
	"git.sxidc.com/go-tools/utils/strutils"
	"net/http"
)

// PostRoute POST直传API
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func PostRoute(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodPost, opts...)
}

// DeleteRoute DELETE直传API
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func DeleteRoute(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodDelete, opts...)
}

// PutRoute PUT直传API
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func PutRoute(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodPut, opts...)
}

// GetRoute GET直传API
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func GetRoute(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodGet, opts...)
}

// PostRouteWithTenantIDAndUserID POST直传API，请求Body是JsonBody，且会添加租户ID和用户ID字段，字段名分别为tenantId和userId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func PostRouteWithTenantIDAndUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodPost, append(opts,
		WithTenantIDParamsName("tenantId"),
		WithUserIDParamsName("userId"))...)
}

// PostRouteWithTenantIDAndCreateUserID POST直传API，请求Body是JsonBody，且会添加租户ID和用户ID字段，字段名分别为tenantId和createUserId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func PostRouteWithTenantIDAndCreateUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodPost, append(opts,
		WithTenantIDParamsName("tenantId"),
		WithUserIDParamsName("createUserId"))...)
}

// DeleteRouteWithTenantIDAndUserID DELETE直传API，会在查询参数添加租户ID和用户ID字段，字段名分别为tenantId和userId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func DeleteRouteWithTenantIDAndUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodDelete, append(opts,
		WithTenantIDParamsName("tenantId"),
		WithUserIDParamsName("userId"))...)
}

// DeleteRouteWithTenantIDAndDeleteUserID DELETE直传API，会在查询参数添加租户ID和用户ID字段，字段名分别为tenantId和deleteUserId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func DeleteRouteWithTenantIDAndDeleteUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodDelete, append(opts,
		WithTenantIDParamsName("tenantId"),
		WithUserIDParamsName("deleteUserId"))...)
}

// PutRouteWithTenantIDAndUserID PUT直传API，请求Body是JsonBody，且会添加租户ID和用户ID字段，字段名分别为tenantId和userId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func PutRouteWithTenantIDAndUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodPut, append(opts,
		WithTenantIDParamsName("tenantId"),
		WithUserIDParamsName("userId"))...)
}

// PutRouteWithTenantIDAndUpdateUserID PUT直传API，请求Body是JsonBody，且会添加租户ID和用户ID字段，字段名分别为tenantId和updateUserId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func PutRouteWithTenantIDAndUpdateUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodPut, append(opts,
		WithTenantIDParamsName("tenantId"),
		WithUserIDParamsName("updateUserId"))...)
}

// GetRouteWithTenantIDAndUserID GET直传API，会在查询参数添加租户ID和用户ID字段，字段名分别为tenantId和userId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func GetRouteWithTenantIDAndUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodGet, append(opts,
		WithTenantIDParamsName("tenantId"),
		WithUserIDParamsName("userId"))...)
}

// GetRouteWithTenantIDAndCreateUserID GET直传API，会在查询参数添加租户ID和用户ID字段，字段名分别为tenantId和createUserId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func GetRouteWithTenantIDAndCreateUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodGet, append(opts,
		WithTenantIDParamsName("tenantId"),
		WithUserIDParamsName("createUserId"))...)
}

// GetRouteWithTenantIDAndDeleteUserID GET直传API，会在查询参数添加租户ID和用户ID字段，字段名分别为tenantId和deleteUserId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func GetRouteWithTenantIDAndDeleteUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodGet, append(opts,
		WithTenantIDParamsName("tenantId"),
		WithUserIDParamsName("deleteUserId"))...)
}

// GetRouteWithTenantIDAndUpdateUserID GET直传API，会在查询参数添加租户ID和用户ID字段，字段名分别为tenantId和updateUserId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func GetRouteWithTenantIDAndUpdateUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodGet, append(opts,
		WithTenantIDParamsName("tenantId"),
		WithUserIDParamsName("updateUserId"))...)
}

// PostRouteWithTenantID POST直传API，请求Body是JsonBody，且会添加租户ID字段，字段名分别为tenantId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func PostRouteWithTenantID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodPost, append(opts,
		WithTenantIDParamsName("tenantId"))...)
}

// DeleteRouteWithTenantID DELETE直传API，会在查询参数添加租户ID字段，字段名分别为tenantId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func DeleteRouteWithTenantID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodDelete, append(opts,
		WithTenantIDParamsName("tenantId"))...)
}

// PutRouteWithTenantID PUT直传API，请求Body是JsonBody，且会添加租户ID字段，字段名分别为tenantId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func PutRouteWithTenantID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodPut, append(opts,
		WithTenantIDParamsName("tenantId"))...)
}

// GetRouteWithTenantID GET直传API，会在查询参数添加租户ID字段，字段名分别为tenantId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func GetRouteWithTenantID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodGet, append(opts,
		WithTenantIDParamsName("tenantId"))...)
}

// PostRouteWithUserID POST直传API，请求Body是JsonBody，且会添加用户ID字段，字段名分别为userId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func PostRouteWithUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodPost, append(opts,
		WithUserIDParamsName("userId"))...)
}

// PostRouteWithCreateUserID POST直传API，请求Body是JsonBody，且会添加用户ID字段，字段名分别为createUserId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func PostRouteWithCreateUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodPost, append(opts,
		WithUserIDParamsName("createUserId"))...)
}

// DeleteRouteWithUserID DELETE直传API，会在查询参数添加用户ID字段，字段名分别为userId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func DeleteRouteWithUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodDelete, append(opts,
		WithUserIDParamsName("userId"))...)
}

// DeleteRouteWithDeleteUserID DELETE直传API，会在查询参数添加用户ID字段，字段名分别为deleteUserId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func DeleteRouteWithDeleteUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodDelete, append(opts,
		WithUserIDParamsName("deleteUserId"))...)
}

// PutRouteWithUserID PUT直传API，请求Body是JsonBody，且会添加用户ID字段，字段名分别为createUserId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func PutRouteWithUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodPut, append(opts,
		WithUserIDParamsName("userId"))...)
}

// PutRouteWithUpdateUserID PUT直传API，请求Body是JsonBody，且会添加用户ID字段，字段名分别为updateUserId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func PutRouteWithUpdateUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodPut, append(opts,
		WithUserIDParamsName("updateUserId"))...)
}

// GetRouteWithUserID GET直传API，会在查询参数添加用户ID字段，字段名分别为userId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func GetRouteWithUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodGet, append(opts,
		WithUserIDParamsName("userId"))...)
}

// GetRouteWithCreateUserID GET直传API，会在查询参数添加用户ID字段，字段名分别为createUserId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func GetRouteWithCreateUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodGet, append(opts,
		WithUserIDParamsName("createUserId"))...)
}

// GetRouteWithDeleteUserID GET直传API，会在查询参数添加用户ID字段，字段名分别为deleteUserId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func GetRouteWithDeleteUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodGet, append(opts,
		WithUserIDParamsName("deleteUserId"))...)
}

// GetRouteWithUpdateUserID GET直传API，会在查询参数添加用户ID字段，字段名分别为updateUserId
// 参数:
// - builder: 该网关API构建器
// - params: 网关直通参数
// - opts: 网关直通选项
// 返回值: 无
func GetRouteWithUpdateUserID(builder *gateway.Builder, params *Simple, opts ...Option) {
	params.passThrough(builder, http.MethodGet, append(opts,
		WithUserIDParamsName("updateUserId"))...)
}

// Simple 参数
type Simple struct {
	// RelativePath 网关开放API的RelativePath
	RelativePath string

	// 服务的URL
	ServiceUrl string
}

func (params *Simple) passThrough(builder *gateway.Builder, httpMethod string, opts ...Option) {
	options := new(Options)
	for _, opt := range opts {
		opt(options)
	}

	builder.AddRoute(httpMethod, params.RelativePath,
		func(requestBuilder *gateway.RequestBuilder) {
			if options.responseSuccessCallback != nil {
				requestBuilder.ResponseSuccessCallback(options.responseSuccessCallback)
			}

			if options.responseErrorCallback != nil {
				requestBuilder.ResponseErrorCallback(options.responseErrorCallback)
			}

			if strutils.IsStringNotEmpty(options.tenantIDParamsName) ||
				strutils.IsStringNotEmpty(options.userIDParamsName) {
				if httpMethod == http.MethodPost || httpMethod == http.MethodPut {
					err := gateway.AddJsonBodyTenantIDAndUserID(requestBuilder, options.tenantIDParamsName, options.userIDParamsName)
					if err != nil {
						requestBuilder.ResponseError(err)
						return
					}
				}

				if httpMethod == http.MethodDelete || httpMethod == http.MethodGet {
					err := gateway.AddQueryParamsTenantIDAndUserID(requestBuilder, options.tenantIDParamsName, options.userIDParamsName)
					if err != nil {
						requestBuilder.ResponseError(err)
						return
					}
				}
			}

			if options.beforeRequestCallback != nil {
				err := options.beforeRequestCallback(requestBuilder)
				if err != nil {
					requestBuilder.ResponseError(err)
					return
				}
			}

			requestOptions := make([]gateway.RequestOption, 0)
			if options.afterRequestCallback != nil {
				requestOptions = append(requestOptions, gateway.WithRequestResponseCallback(
					func(requestBuilder *gateway.RequestBuilder, response *http_client.Response) error {
						err := options.afterRequestCallback(requestBuilder)
						if err != nil {
							return err
						}

						return nil
					}))
			}

			switch httpMethod {
			case http.MethodPost:
				requestBuilder.Post(&gateway.PostRequest{
					Url: params.ServiceUrl,
				}, requestOptions...)
			case http.MethodDelete:
				requestBuilder.Delete(&gateway.DeleteRequest{
					Url: params.ServiceUrl,
				}, requestOptions...)
			case http.MethodPut:
				requestBuilder.Put(&gateway.PutRequest{
					Url: params.ServiceUrl,
				}, requestOptions...)
			case http.MethodGet:
				requestBuilder.Get(&gateway.GetRequest{
					Url: params.ServiceUrl,
				}, requestOptions...)
			default:
				panic("不支持的请求类型")
			}

			requestBuilder.Request()
		}, options.middlewares...)
}

type RequestBuilderCallback func(requestBuilder *gateway.RequestBuilder) error

type Option func(options *Options)

type Options struct {
	// tenantIDParamsName 租户ID请求参数名称
	tenantIDParamsName string

	// userIDParamsName 用户ID请求参数名称
	userIDParamsName string

	// beforeRequestCallback 请求前回调
	beforeRequestCallback RequestBuilderCallback

	// afterRequestCallback 请求后回调
	afterRequestCallback RequestBuilderCallback

	// responseSuccessCallback 成功响应回调
	responseSuccessCallback gateway.ResponseSuccessCallback

	// responseErrorCallback 失败响应回调
	responseErrorCallback gateway.ResponseErrorCallback

	// 中间件
	middlewares []gateway.Handler
}

// WithTenantIDParamsName 设置请求参数中的租户ID参数的名称
func WithTenantIDParamsName(tenantIDParamsName string) Option {
	return func(options *Options) {
		options.tenantIDParamsName = tenantIDParamsName
	}
}

// WithUserIDParamsName 设置请求参数中的用户ID参数的名称
func WithUserIDParamsName(userIDParamsName string) Option {
	return func(options *Options) {
		options.userIDParamsName = userIDParamsName
	}
}

// WithBeforeRequestCallback 设置请求前回调
func WithBeforeRequestCallback(callback RequestBuilderCallback) Option {
	return func(options *Options) {
		options.beforeRequestCallback = callback
	}
}

// WithAfterRequestCallback 设置请求后回调
func WithAfterRequestCallback(callback RequestBuilderCallback) Option {
	return func(options *Options) {
		options.afterRequestCallback = callback
	}
}

// WithResponseSuccessCallback 设置成功响应回调，默认回调会将服务响应作为网关API的响应返回
func WithResponseSuccessCallback(callback gateway.ResponseSuccessCallback) Option {
	return func(options *Options) {
		options.responseSuccessCallback = callback
	}
}

// WithResponseErrorCallback 设置失败响应回调，默认回调会按照是否存在错误返回MsgResponse
func WithResponseErrorCallback(callback gateway.ResponseErrorCallback) Option {
	return func(options *Options) {
		options.responseErrorCallback = callback
	}
}

// WithMiddlewares 设置中间件
func WithMiddlewares(middlewares ...gateway.Handler) Option {
	return func(options *Options) {
		options.middlewares = middlewares
	}
}