import { useMemo } from "react";
import Icon from "./icon";
import styles from "./ClockTimeline.module.css";
import { ACTION_PRESETS } from "./types";
import TimelineRow from "./components/TimelineRow";
import { useClockStore } from "../store/useClockStore";

type Props = {};

export const defaultActivationSignal = {
  type: "virtual-signal",
  name: "signal-check",
  subgroup: "virtual-signal",
  icon: "virtual-signal/signal-check.png",
  order: "a[checked]",
};

export default function ClockTimeline({}: Props) {
  const { duration, rowOrder, alignmentTick, addRow } = useClockStore();

  const majorTicks = useMemo(() => {
    const step = Math.max(1, Math.round(duration / 10));
    const out: number[] = [];
    for (let t = 0; t <= duration; t += step) out.push(t);
    return out;
  }, [duration]);

  const onPaletteDragStart = (e: React.DragEvent, presetId: string) => {
    e.dataTransfer.setData("text/plain", presetId);
    e.dataTransfer.effectAllowed = "copy";
  };

  const handleAddRow = () => {
    addRow({
      id: `row-${Date.now()}`,
      name: `Row ${rowOrder.length + 1}`,
      signals: [defaultActivationSignal],
      stackSize: 16,
      inserterCount: 1,
    });
  };

  return (
    <div className={styles.wrap}>
      <div className={styles.palette}>
        {ACTION_PRESETS.map((p) => (
          <div
            key={p.id}
            className={styles.chip}
            draggable
            onDragStart={(e) => onPaletteDragStart(e, p.id)}
          >
            {p.fromItem && (
              <Icon iconName={`item/${p.fromItem}.png`} size={20} />
            )}
            <span>{p.label}</span>
            <span className={styles.chipTicks}>{p.ticks}t</span>
          </div>
        ))}
        <span className={styles.hint}>
          Drag onto a row · Shift-click to multi-select · Ctrl+D to duplicate
        </span>
      </div>

      <div className={styles.ruler}>
        {majorTicks.map((t) => (
          <div
            key={t}
            className={styles.rulerTick}
            style={{ left: `${(t / duration) * 100}%` }}
          >
            <span>{t}</span>
          </div>
        ))}
        <div className={styles.rulerReset} />
      </div>

      <div className={styles.rows}>
        {alignmentTick !== null && (
          <div
            className={styles.alignGuide}
            style={{ left: `${(alignmentTick / duration) * 100}%` }}
          />
        )}

        {rowOrder.map((rowId) => (
          <TimelineRow key={rowId} rowId={rowId} />
        ))}

        <button className={styles.addRowBtn} onClick={handleAddRow}>
          + Add row
        </button>
      </div>
    </div>
  );
}