// Package api_doc ...
//
// Description : api_doc ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2024-12-24 10:34
package api_doc

import (
	"errors"
	"git.zhangdeman.cn/gateway/api-doc/define"
	"git.zhangdeman.cn/zhangdeman/consts"
	"git.zhangdeman.cn/zhangdeman/serialize"
	"net/http"
	"strings"
)

// ParseSwagger2 解析swagger2.0版本文档
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 10:33 2024/12/24
func ParseSwagger2(docContent []byte) (*define.DocParseResult, error) {
	var (
		err        error
		swaggerDoc define.Swagger
	)

	if err = serialize.JSON.UnmarshalWithNumber(docContent, &swaggerDoc); nil != err {
		return nil, errors.New("parse swagger json fail : " + err.Error())
	}
	docResult := &define.DocParseResult{
		Domain:                  swaggerDoc.Host,
		Title:                   swaggerDoc.Info.Title,
		Description:             swaggerDoc.Info.Description,
		UriList:                 make([]*define.UriBaseConfig, 0),
		GlobalSecurityParamList: make([]*define.ParamConfig, 0),
	}
	if docResult.UriList, err = buildUriList(&swaggerDoc); nil != err {
		return nil, err
	}
	docResult.GlobalSecurityParamList = buildSwagger2GlobalSecurityParamList(&swaggerDoc)
	return docResult, nil
}

// buildSwagger2GlobalSecurityParamList 构建全局安全类参数
func buildSwagger2GlobalSecurityParamList(swaggerDoc *define.Swagger) []*define.ParamConfig {
	result := make([]*define.ParamConfig, 0)
	for paramName, paramConfig := range swaggerDoc.SecurityDefinitions {
		if len(paramConfig.In) == 0 {
			continue
		}
		result = append(result, &define.ParamConfig{
			Location:    GetParamLocation(paramConfig.In).String(),
			Path:        paramName,
			Type:        GetDataType(paramConfig.Type, ""),
			Title:       paramName,
			Description: paramConfig.Description,
			Required:    false,
		})
	}
	return result
}

// 解析uri列表
func buildUriList(swaggerDoc *define.Swagger) ([]*define.UriBaseConfig, error) {
	uriList := make([]*define.UriBaseConfig, 0)
	for itemUri, itemUriMethodConfig := range swaggerDoc.Paths {
		for requestMethod, methodConfig := range itemUriMethodConfig {
			initSwagger2UriMethodConfig(requestMethod, methodConfig)
			uriResult := &define.UriBaseConfig{
				Uri:               swaggerDoc.BasePath + "/" + strings.TrimLeft(itemUri, "/"),
				Method:            strings.ToUpper(requestMethod),
				ContentType:       methodConfig.Consumes,
				OutputContentType: methodConfig.Produces,
				TagList:           methodConfig.Tags,
				Summary:           methodConfig.Summary,
				Description:       methodConfig.Description,
				ParamList:         buildSwagger2ParamConfig(swaggerDoc, methodConfig.Parameters),
				ResultList:        buildSwagger2ResultConfig(swaggerDoc, methodConfig.Responses),
			}
			uriList = append(uriList, uriResult)
		}
	}
	return uriList, nil
}

// 初始化配置请求方法 返回类型
func initSwagger2UriMethodConfig(requestMethod string, methodConfig *define.SwaggerPathConfig) {
	if len(methodConfig.Consumes) == 0 {
		// 未配置请求方法, 写请求 json , 读请求 form
		if strings.ToUpper(requestMethod) == http.MethodPost ||
			strings.ToUpper(requestMethod) == http.MethodPut ||
			strings.ToUpper(requestMethod) == http.MethodPatch ||
			strings.ToUpper(requestMethod) == http.MethodDelete {
			methodConfig.Consumes = []string{
				consts.MimeTypeJson,
			}
		} else {
			methodConfig.Consumes = []string{
				consts.MimeTypeXWWWFormUrlencoded,
			}
		}
	}
	if len(methodConfig.Produces) == 0 {
		// 未配置输出数据类型, 默认 json
		methodConfig.Produces = []string{
			consts.MimeTypeJson,
		}
	}
}

// buildSwagger2ParamConfig 构建请求参数配置
func buildSwagger2ParamConfig(swaggerDoc *define.Swagger, paramConfigList []*define.SwaggerPathConfigParameter) []*define.ParamConfig {
	res := make([]*define.ParamConfig, 0)
	// 解析参数
	for _, paramConfig := range paramConfigList {
		if paramConfig.Name != "body" {
			paramConfigBuildConfig := &define.ParamConfig{
				Location:    GetParamLocation(paramConfig.In).String(),
				Path:        paramConfig.Name,
				Type:        GetDataType(paramConfig.Type, paramConfig.Format),
				Title:       paramConfig.Name,
				Description: paramConfig.Description,
				Required:    paramConfig.Required,
			}
			res = append(res, paramConfigBuildConfig)
		}

		if nil == paramConfig.Schema || len(paramConfig.Schema.Ref) == 0 {
			continue
		}
		// 可以继续展开
		requiredTable := make(map[string]bool)
		for _, paramName := range swaggerDoc.Definitions[GetRealDefinitionsKey(paramConfig.Schema.Ref)].Required {
			requiredTable[paramName] = true
		}
		for paramName, paramMoreConfig := range swaggerDoc.Definitions[GetRealDefinitionsKey(paramConfig.Schema.Ref)].Properties {
			if paramConfig.Name != "body" {
				paramName = paramConfig.Name + "." + paramName
			}
			paramConfigBuildConfig := &define.ParamConfig{
				Location:    GetParamLocation(paramConfig.In).String(),
				Path:        paramName,
				Type:        GetDataType(paramMoreConfig.Type, ""),
				Title:       paramName,
				Description: paramMoreConfig.Description,
				Required:    requiredTable[paramName],
			}
			res = append(res, paramConfigBuildConfig)
			if DataTypeIsArray(paramMoreConfig.Type) && nil != paramMoreConfig.Items && len(paramMoreConfig.Items.Ref) > 0 {
				// 是数组，且每一项是对象, 继续展开
				res = append(res, ExpandArrayParam(swaggerDoc, paramMoreConfig.Items.Ref, paramConfigBuildConfig.Path)...)
			}
		}
	}

	return res
}

// buildSwagger2ResultConfig 构建响应结果配置
func buildSwagger2ResultConfig(swaggerDoc *define.Swagger, resultConfig map[string]*define.SwaggerPathConfigResponse) []*define.ResultConfig {
	res := make([]*define.ResultConfig, 0)
	if nil == resultConfig || len(resultConfig) == 0 {
		return res
	}
	successResponseConfig := GetSuccessResponseConfig(resultConfig)
	if nil == successResponseConfig {
		return res
	}
	definitionsKey := ""
	if swaggerDoc.Responses == nil {
		definitionsKey = successResponseConfig.Schema.Ref
	} else {
		responseKey := GetRealResponseKey(successResponseConfig.Ref)
		if len(responseKey) == 0 {
			// 204 场景下，可能没有响应body
			res = append(res, &define.ResultConfig{
				Location:    consts.ResponseDataLocationBody.String(),
				Path:        consts.ResponseDataLocationBodyRoot.String(),
				Type:        consts.DataTypeAny.String(),
				Title:       "response body no content",
				Description: "no content",
			})
			return res
		}
		ref := swaggerDoc.Responses[responseKey].Ref
		if len(ref) == 0 {
			if nil != swaggerDoc.Responses[responseKey].Schema {
				ref = swaggerDoc.Responses[responseKey].Schema.Ref
			}
		}
		definitionsKey = GetRealDefinitionsKey(ref)
	}
	if len(definitionsKey) == 0 {
		// 不是引用类型, 直接定义的具体类型
		responseKey := GetRealResponseKey(successResponseConfig.Ref)
		responseTypeDefine := swaggerDoc.Responses[responseKey]
		responseType := ""
		schemaType := ""
		if nil == responseTypeDefine.Schema {
			// 204 等场景下，可能没有响应body
			responseType = consts.DataTypeAny.String()
		} else {
			schemaType = responseTypeDefine.Schema.Type
			responseType = GetDataType(responseTypeDefine.Schema.Type, "")
		}
		resCfg := &define.ResultConfig{
			Location:    consts.ResponseDataLocationBody.String(),
			Path:        consts.ResponseDataLocationBodyRoot.String(),
			Type:        responseType,
			Title:       "response body",
			Description: "response body",
		}
		res = append(res, resCfg)
		if DataTypeIsArray(schemaType) && len(responseTypeDefine.Schema.Items.Ref) > 0 {
			res = append(res, ExpandArrayResult(swaggerDoc, responseTypeDefine.Schema.Items.Ref, resCfg.Path)...)
		}
	} else {
		responseTypeDefine := swaggerDoc.Definitions[definitionsKey]
		for responseKey, responseKeyConfig := range responseTypeDefine.Properties {
			res = append(res, &define.ResultConfig{
				Location:    consts.ResponseDataLocationBody.String(),
				Path:        responseKey,
				Type:        GetDataType(responseKeyConfig.Type, ""),
				Title:       responseKey,
				Description: responseKey,
			})
		}
	}
	return res
}