// Copyright (c) 2022 Alibaba Group Holding Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package tools

import (
	"encoding/json"
	"errors"
	"fmt"
	"net/http"
	"net/url"

	"amap-tools/config"

	"github.com/alibaba/higress/plugins/wasm-go/pkg/mcp/server"
	"github.com/alibaba/higress/plugins/wasm-go/pkg/mcp/utils"
)

var _ server.Tool = ReGeocodeRequest{}

type ReGeocodeRequest struct {
	Location string `json:"location" jsonschema_description:"经纬度"`
}

func (t ReGeocodeRequest) Description() string {
	return "将一个高德经纬度坐标转换为行政区划地址信息"
}

func (t ReGeocodeRequest) InputSchema() map[string]any {
	return server.ToInputSchema(&ReGeocodeRequest{})
}

func (t ReGeocodeRequest) Create(params []byte) server.Tool {
	request := &ReGeocodeRequest{}
	json.Unmarshal(params, &request)
	return request
}

func (t ReGeocodeRequest) Call(ctx server.HttpContext, s server.Server) error {
	serverConfig := &config.AmapServerConfig{}
	s.GetConfig(serverConfig)
	if serverConfig.ApiKey == "" {
		return errors.New("amap API-KEY is not configured")
	}

	url := fmt.Sprintf("http://restapi.amap.com/v3/geocode/regeo?location=%s&key=%s&source=ts_mcp", url.QueryEscape(t.Location), serverConfig.ApiKey)
	return ctx.RouteCall(http.MethodGet, url,
		[][2]string{{"Accept", "application/json"}}, nil, func(statusCode int, responseHeaders http.Header, responseBody []byte) {
			if statusCode != http.StatusOK {
				utils.OnMCPToolCallError(ctx, fmt.Errorf("regeocode call failed, status: %d", statusCode))
				return
			}
			var response struct {
				Status    string `json:"status"`
				Info      string `json:"info"`
				Regeocode struct {
					AddressComponent struct {
						Province string `json:"province"`
						City     string `json:"city"`
						District string `json:"district"`
					} `json:"addressComponent"`
				} `json:"regeocode"`
			}
			err := json.Unmarshal(responseBody, &response)
			if err != nil {
				utils.OnMCPToolCallError(ctx, fmt.Errorf("failed to parse regeocode response: %v", err))
				return
			}
			if response.Status != "1" {
				utils.OnMCPToolCallError(ctx, fmt.Errorf("regeocode failed: %s", response.Info))
				return
			}
			result := fmt.Sprintf(`{"province": "%s", "city": "%s", "district": "%s"}`, response.Regeocode.AddressComponent.Province, response.Regeocode.AddressComponent.City, response.Regeocode.AddressComponent.District)
			utils.SendMCPToolTextResult(ctx, result)
		})
}