// 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 (
	"github.com/gogf/gf/g/util/gconv"
)

// 初始化POST请求参数
func (r *Request) initPost() {
	if !r.parsedPost {
		// MultiMedia表单请求解析允许最大使用内存：1GB
		if r.ParseMultipartForm(1024*1024*1024) == nil {
			r.parsedPost = true
		}
	}
}

// 设置POST参数，仅在ghttp.Server内有效，**注意并发安全性**
func (r *Request) SetPost(key string, value string) {
	r.initPost()
	r.PostForm[key] = []string{value}
}

func (r *Request) AddPost(key string, value string) {
	r.initPost()
	r.PostForm[key] = append(r.PostForm[key], value)
}

// 获得post参数
func (r *Request) GetPost(key string, def ...interface{}) []string {
	r.initPost()
	if v, ok := r.PostForm[key]; ok {
		return v
	}
	if len(def) > 0 {
		return gconv.Strings(def[0])
	}
	return nil
}

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

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

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

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

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

func (r *Request) GetPostFloat32(key string, def ...interface{}) float32 {
	value := r.GetPostString(key, def...)
	if value != "" {
		return gconv.Float32(value)
	}
	return 0
}

func (r *Request) GetPostFloat64(key string, def ...interface{}) float64 {
	value := r.GetPostString(key, def...)
	if value != "" {
		return gconv.Float64(value)
	}
	return 0
}

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

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

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

func (r *Request) GetPostInterfaces(key string, def ...interface{}) []interface{} {
	value := r.GetPost(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
// 需要注意的是，如果其中一个字段为数组形式，那么只会返回第一个元素，如果需要获取全部的元素，请使用GetPostArray获取特定字段内容
func (r *Request) GetPostMap(def ...map[string]string) map[string]string {
	r.initPost()
	m := make(map[string]string)
	for k, v := range r.PostForm {
		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request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) GetPostToStruct(pointer interface{}, mapping ...map[string]string) error {
	tagMap := r.getStructParamsTagMap(pointer)
	if len(mapping) > 0 {
		for k, v := range mapping[0] {
			tagMap[k] = v
		}
	}
	params := make(map[string]interface{})
	for k, v := range r.GetPostMap() {
		params[k] = v
	}
	return gconv.Struct(params, pointer, tagMap)
}