// Copyright 2017 gf Author(https://github.com/gogf/gf). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.

package ghttp

import (
	"strings"

	"github.com/gogf/gf/container/gvar"

	"github.com/gogf/gf/internal/structs"
	"github.com/gogf/gf/util/gconv"
)

// 初始化GET请求参数
func (r *Request) initGet() {
	if !r.parsedGet {
		r.queryVars = r.URL.Query()
		if strings.EqualFold(r.Method, "GET") {
			if raw := r.GetRawString(); len(raw) > 0 {
				var array []string
				for _, item := range strings.Split(raw, "&") {
					array = strings.Split(item, "=")
					r.queryVars[array[0]] = append(r.queryVars[array[0]], array[1])
				}
			}
		}
		r.parsedGet = true
	}
}

// 设置GET参数，仅在ghttp.Server内有效，**注意并发安全性**
func (r *Request) SetQuery(key string, value string) {
	r.initGet()
	r.queryVars[key] = []string{value}
}

// 添加GET参数，构成[]string
func (r *Request) AddQuery(key string, value string) {
	r.initGet()
	r.queryVars[key] = append(r.queryVars[key], value)
}

// 获得指定名称的get参数列表
func (r *Request) GetQuery(key string, def ...interface{}) []string {
	r.initGet()
	if v, ok := r.queryVars[key]; ok {
		return v
	}
	if len(def) > 0 {
		return gconv.Strings(def[0])
	}
	return nil
}

func (r *Request) GetQueryVar(key string, def ...interface{}) *gvar.Var {
	return gvar.New(r.GetQueryString(key, def...))
}

func (r *Request) GetQueryString(key string, def ...interface{}) string {
	value := r.GetQuery(key, def...)
	if value != nil && value[0] != "" {
		return value[0]
	}
	return ""
}

func (r *Request) GetQueryBool(key string, def ...interface{}) bool {
	value := r.GetQueryString(key, def...)
	if value != "" {
		return gconv.Bool(value)
	}
	return false
}

func (r *Request) GetQueryInt(key string, def ...interface{}) int {
	value := r.GetQueryString(key, def...)
	if value != "" {
		return gconv.Int(value)
	}
	return 0
}

func (r *Request) GetQueryInts(key string, def ...interface{}) []int {
	value := r.GetQuery(key, def...)
	if value != nil {
		return gconv.Ints(value)
	}
	return nil
}

func (r *Request) GetQueryUint(key string, def ...interface{}) uint {
	value := r.GetQueryString(key, def...)
	if value != "" {
		return gconv.Uint(value)
	}
	return 0
}

func (r *Request) GetQueryFloat32(key string, def ...interface{}) float32 {
	value := r.GetQueryString(key, def...)
	if value != "" {
		return gconv.Float32(value)
	}
	return 0
}

func (r *Request) GetQueryFloat64(key string, def ...interface{}) float64 {
	value := r.GetQueryString(key, def...)
	if value != "" {
		return gconv.Float64(value)
	}
	return 0
}

func (r *Request) GetQueryFloats(key string, def ...interface{}) []float64 {
	value := r.GetQuery(key, def...)
	if value != nil {
		return gconv.Floats(value)
	}
	return nil
}

func (r *Request) GetQueryArray(key string, def ...interface{}) []string {
	return r.GetQuery(key, def...)
}

func (r *Request) GetQueryStrings(key string, def ...interface{}) []string {
	return r.GetQuery(key, def...)
}

func (r *Request) GetQueryInterfaces(key string, def ...interface{}) []interface{} {
	value := r.GetQuery(key, def...)
	if value != nil {
		return gconv.Interfaces(value)
	}
	return nil
}

// 获取指定键名的关联数组，并且给定当指定键名不存在时的默认值
func (r *Request) GetQueryMap(def ...map[string]string) map[string]string {
	r.initGet()
	m := make(map[string]string)
	for k, v := range r.queryVars {
		m[k] = v[0]
	}
	if len(def) > 0 {
		for k, v := range def[0] {
			if _, ok := m[k]; !ok {
				m[k] = v
			}
		}
	}
	return m
}

// 将所有的get参数映射到struct属性上，参数object应当为一个struct对象的指针, mapping为非必需参数，自定义参数与属性的映射关系
func (r *Request) GetQueryToStruct(pointer interface{}, mapping ...map[string]string) error {
	tagmap := structs.TagMapName(pointer, paramTagPriority, true)
	if len(mapping) > 0 {
		for k, v := range mapping[0] {
			tagmap[k] = v
		}
	}
	params := make(map[string]interface{})
	for k, v := range r.GetQueryMap() {
		params[k] = v
	}
	return gconv.StructDeep(params, pointer, tagmap)
}