package dynlink

import (
	"lx-source/src/caches"
	"lx-source/src/caches/localcache"
	"lx-source/src/env"
	"lx-source/src/middleware/util"
	"net/http"

	"github.com/ZxwyWebSite/ztool"
	"github.com/gin-gonic/gin"
)

type DynLink struct {
	Mode uint8
	Link string
}

// var ExLink func(string) string = func(s string) string { return s }

// func localInit(c string) func(string) string {
// 	return func(l string) string {
// 		return ztool.Str_FastConcat(c, `/`, l)
// 	}
// }

// Doc 动态链
/*
 0. 链接格式
    - (Mode: 链接模式 0:本地/1:远程, Link: 真实链接), id(uint32 4294967295)
    - yyyymmdd/unixsecond/hex(:s/:id/:q).format(flac24bit->fl24)
 1. 传入参数 (得到音乐链接后生成随机链并写入缓存)
    + Data1 查询缓存
    - key: "lx/0000000001/320k"
    - val: "`{cache.Path}/file/`20231221/1703176257/6c782f303030303030303030312f3332306b.mp3"
    + Data2 直链缓存
    - key: "20231221/1703176257/6c782f303030303030303030312f3332306b.mp3"
    - val: "&DynLink{Mode: 0, Link: 'cache/lx/0000000001/320k'}"
	+ 返回链接: "http://127.0.0.1/file/lx/0000000001/320k.mp3"
 2. 查询缓存
    - key: "20231221/1703176257/6c782f303030303030303030312f3332306b.mp3"
    - val: "&DynLink{Mode: 0, Link: 'cache/lx/0000000001/320k'}"
    - va2: "&DynLink{Mode: 1, Link: 'http://127.0.0.1/file/lx/0000000001/320k.mp3'}"
 3. 实际数据 (访问 /file/:t/:x/:f)
    + if Mode==0 本地数据直接发送
    - c.File(Link)
    + if Mode==1 远程数据302跳转
    - c.Redirect(Link)

 0. 实现思路

*/

func LoadHandler(r *gin.Engine) {
	loger := env.Loger.NewGroup(`DynLink`)
	cache, cok := caches.UseCache.(*localcache.Cache)
	// env.Cache.Set(`date/second/fname.mp3`, DynLink{Mode: 0, Link: `wy/3203127/320k.mp3`}, 0)
	// env.Cache.Set(`date/second/lname.mp3`, DynLink{Mode: 1, Link: `https://r2eu.zxwy.link/gh/lx-source/static/error.mp3`}, 0)
	// 动态链已完成(beta)...
	if env.Config.Cache.LinkMode == `dynamic` || env.Config.Cache.LinkMode == `2` /*|| true*/ {
		loger.Debug(`UseDynamic`)
		r.GET(`/file/:t/:x/:f`, func(c *gin.Context) {
			parms := util.ParaMap(c)
			t, x, f := parms[`t`], parms[`x`], parms[`f`]
			if clink, ok := env.Cache.Get(ztool.Str_FastConcat(t, `/`, x, `/`, f)); ok {
				if dyn, ok := clink.(DynLink); ok {
					if dyn.Mode == 0 && cok {
						c.File(ztool.Str_FastConcat(cache.Path, `/`, dyn.Link))
						return
					}
					c.Redirect(http.StatusFound, dyn.Link)
					return
				}
			}
			c.AbortWithStatus(http.StatusNotFound)
		})
	} else if cok {
		loger.Debug(`UseStatic`)
		// ExLink = localInit(cache.Path)
		r.Static(`/file`, cache.Path)
	}
}

// func FileHandler() gin.HandlerFunc {
// 	loger := env.Loger.NewGroup(`DynLink`)
// 	// 为了兼容原静态链，必须设置3个参数
// 	// file/:{time.unix}/:{md5(cquery)}/:{fname}  1703006183//77792f3434343730363834382f3332306b.mp3
// 	// file/:date/:second/:fname 20231219/1703006183/77792f3434343730363834382f3332306b.mp3
// 	env.Cache.Set(`20211008/hello/test.mp3`, DynLink{Link: `/www/wwwroot/lx-source/data/cache/wy/3203127/320k.mp3`}, 0)

// 	if env.Config.Cache.LinkMode == `dynamic` || env.Config.Cache.LinkMode == `2` /*|| true*/ {
// 		loger.Debug(`UseDynamic`)
// 		return func(c *gin.Context) {
// 			parms := util.ParaMap(c)
// 			t, x, f := parms[`t`], parms[`x`], parms[`f`]
// 			if clink, ok := env.Cache.Get(ztool.Str_FastConcat(t, `/`, x, `/`, f)); ok {
// 				if dyn, ok := clink.(DynLink); ok {
// 					if dyn.Mode == 0 {
// 						c.File(ztool.Str_FastConcat(dyn.Link))
// 						return
// 					}
// 					c.Redirect(http.StatusFound, dyn.Link)
// 					return
// 				}
// 			}
// 			c.AbortWithStatus(http.StatusNotFound)
// 		}
// 	}
// 	if cache, ok := caches.UseCache.(*localcache.Cache); ok {
// 		loger.Debug(`UseStatic`)
// 		return func(c *gin.Context) {
// 			parms := util.ParaMap(c)
// 			t, x, f := parms[`t`], parms[`x`], parms[`f`]
// 			c.File(ztool.Str_FastConcat(cache.Path, `/`, t, `/`, x, `/`, f))
// 		}
// 	}
// 	return func(c *gin.Context) {
// 		c.AbortWithStatus(http.StatusNotFound)
// 	}
// }