export type Work = {data:string, user:string, time:number};
export type Part = {name:string, time:number, work:Work[], need:Desk[], make:Desk[]};
export type Need = [part:Part, time:number];
export type DeskMode = "all" | "one";
export type Desk = {name:string, need:Need[], make:Part[], mode:DeskMode, role:[]};

const Part = (name:string):Part=>
{
    return {name, time:0, work:[], need:[], make:[]};
}

const Desk = (name:string, need:Need[], make:Part[], mode:DeskMode):Desk=>
{
    const obj:Desk = {name, need, make, mode, role:[]};
    for(let i=0; i<need.length; i++)
    {
        const [part] = need[i];

        part.need.push(obj);
    }
    for(let i=0; i<make.length; i++)
    {
        make[i].make.push(obj);
    }
    return obj;
}

const Work =(part:Part, data:string, time=Date.now())=>{
    const work = {data, user:"", time};
    if(time > part.time){
        part.work.unshift(work);
        part.time = time;
    }
    else
    {
        part.work.push(work);
    }
    part.need.forEach(Recompute);
    part.make.forEach(Recompute);
}

const Recompute = (desk:Desk)=>{

    let latestMake = -Infinity;
    for(let i=0; i<desk.make.length; i++)
    {
        const {time} = desk.make[i];
        if(time > latestMake)
        {
            latestMake = time;
        } 
    }

    let latestNeed = -Infinity;
    const dirtyNeed = [];
    for(let i=0; i<desk.need.length; i++)
    {
        const [{time}] = desk.need[i];
        if(time > latestNeed)
        {
            latestNeed = time;
        } 
        if(time < latestMake)
        {
            dirtyNeed.push(i);
        }
    }

    const dirtyMake = []
    for(let i=0; i<desk.make.length; i++)
    {
        const {time} = desk.make[i];
        if(time > latestNeed)
        {
            dirtyMake.push(i);
        } 
    }

    return [dirtyNeed, dirtyMake];
}


type User = {name:string};
type Role = [name:string, users:[]]

function BlockRole<Records extends Record<string, string>>(r:Records):{[K in keyof Records]: Role} {
    const result = {};
    for (const key in r) {
        result[key] = [key, []];
    }
    return result;
}

export {Part, Desk, Work, Recompute, BlockRole};