import { parseLines, TaskBlock } from "../takker99%2Ftakker-scheduler/deps.ts";
import { startOfDay } from "../date-fns/startOfDay.ts";
import { addDays } from "../date-fns/addDays.ts";
import { hasRecord, split } from "./task.ts";
import { BaseLine } from "../scrapbox-jp%2Ftypes/userscript.ts";

export interface PersonalTimeStatus {
  todo: number;
  done: number;
}

export const getPersonalTimeStatus = (lines: BaseLine[], now: Date) => {
  const tasks: TaskBlock[] = [];
  for (let block of parseLines(lines)) {
    if (typeof block === "string") continue;
    // 見積もりできないタスクは除外
    if (!block.plan.duration && !hasRecord(block)) continue;
    
    // 今日以降のタスクを切り出す
    const [, tail] = split(block, startOfDay(now));
    if (!tail) continue;
    block = tail;
    
    // 今日までのタスクを切り出す
    const [head] = split(block, addDays(startOfDay(now), 1));
    if (!head) continue;
    block = head;
    
    tasks.push(block);
  }
  
  // 完了したタスクの消費時間の合計
  const done = tasks.reduce(
    (sum, task) => sum +
      (hasRecord(task) ?
        Math.floor(
          (task.record.end.getTime() - task.record.start.getTime()) / 1000
        ) :
        0
      ),
    0
  );
  
  // 未完了タスクの見積もり時間の合計
  const todo = tasks.reduce(
    (sum, task) => sum + (hasRecord(task) ? 0 : (task.plan.duration ?? 0)),
    0
  );
  
  return { done, todo };
};