const { run, getAll } = require("./base");

// state 0未下载 1下载完成 2已发种
function addDownList(title,url,save,downDate,state,vid){
    let sql = `insert into download(title,url,save,downDate,state,vid) values(?,?,?,?,?,?)`
    run(sql,title,url,save,downDate,state,vid)
}

async function getDownList(){
    let sql = `select * from download where state == 0`
    try{
        let list = await getAll(sql)
        return list
    }catch(err){
        console.error(err)
        return []
    }
}

async function setDownState(id,state){
    let sql = `update download set state = ? where id = ?`
    await run(sql,state,id)
}

async function getVideoInfo(url){
    if(url){
        let sql = `select * from VideoInfo where url = '?'`
        let list = await getAll(sql,url)
    }else{
        let sql = `insert into `
    }
}

async function addVideoInfo(cover){

}

// 获取当前剧集是否下载完成
// todo 多集连发
async function getMediaState(vid){
    let sql = `select * from download where vid=? and (state=0 or state=3)`
    let list = await getAll(sql,vid)
    return !list.length
    // return true
}


/**
 * 获取下载的ep开始与结束
 * @param {string} vid 视频vid
 * @returns {{start:string,end:string}} start开始集数，end结束集数
 */
async function getDownEp(vid){
    let sql = `select * from download where vid=? and (state=3 OR state=0)`
    let list = await getAll(sql,vid)
    console.log(vid,list)
    if(list.length == 0){
        let sql = `select * from download where vid=? and state=1`
        let list = await getAll(sql,vid)
        let ep = []
        for(let i of list){
            ep.push(parseInt(i.title))
        }
        ep.sort((a,b)=>{
            return a - b
        })
        return {
            start: ep[0],
            end:ep[ep.length - 1]
        }
    }else{
        return false
    }
}


/**
 * 通过vid设置下载状态
 * @param {string} vid 视频vid
 * @param {number} state 状态
 */
async function setDownStateVid(vid,state){
    let sql = `update download set state = ? where vid = ?`
    await run(sql,state,vid)
}

module.exports = {
    addDownList,
    getDownList,
    setDownState,
    getMediaState,
    getDownEp,
    setDownStateVid
}