import { ArrowRight, ArrowDown } from 'lucide-react';
import type { Project, Room, FlooringSettings, SkirtingSettings } from '../lib/types';
import { NumberField } from './Fields';
import type { FlooringOptions } from '../lib/flooring';
import { mm } from '../lib/format';

interface Props {
  project: Project;
  room: Room;
  flooringOptions: FlooringOptions;
  setFlooring: (patch: Partial<FlooringSettings>) => void;
  setSkirting: (patch: Partial<SkirtingSettings>) => void;
  changeRoom: (fn: (r: Room) => Room) => void;
}

const kerfHelp =
  'Width of material removed by the saw blade. A 3 mm blade turns a 1,000 mm board into 600 mm + 397 mm after one cut.';

export function MaterialsEditor({
  project,
  room,
  flooringOptions,
  setFlooring,
  setSkirting,
  changeRoom,
}: Props) {
  const f = project.flooring;
  const s = project.skirting;
  const floor = <K extends keyof FlooringSettings>(key: K, value: FlooringSettings[K]) =>
    setFlooring({ [key]: value });
  const skirt = (key: keyof SkirtingSettings, value: number) => setSkirting({ [key]: value });

  return (
    <>
      <div className="editor-heading">
        <h2>Materials</h2>
        <span>Shared across rooms</span>
      </div>
      <section className="material-section flooring" aria-labelledby="flooring-materials">
        <h3 id="flooring-materials" className="material-heading">
          Floorboards
        </h3>
        <p className="helper material-help">
          Use the length and width printed on your flooring pack.
        </p>
        <div className="field-grid">
          <NumberField label="Board length" value={f.length} onChange={(n) => floor('length', n)} />
          <NumberField label="Board width" value={f.width} onChange={(n) => floor('width', n)} />
        </div>
        <div className="field">
          <span>Laying pattern</span>
          <div className="segmented" role="group" aria-label="Laying pattern">
            <button
              className={f.pattern === 'random' ? 'active' : ''}
              aria-pressed={f.pattern === 'random'}
              onClick={() => floor('pattern', 'random')}
            >
              Random
            </button>
            <button
              className={f.pattern === 'brick' ? 'active' : ''}
              aria-pressed={f.pattern === 'brick'}
              onClick={() => floor('pattern', 'brick')}
            >
              Brick
            </button>
          </div>
          <p className="helper">
            {f.pattern === 'random'
              ? 'Maximise randomness spreads out joints to avoid H shapes. Minimise cuts can repeat joint positions.'
              : 'A regular pattern with each row staggered by half a board.'}
          </p>
        </div>
        {f.pattern === 'random' && (
          <div className="field">
            <span>What matters most? · all rooms</span>
            <div className="optimisation-options" role="group" aria-label="Flooring optimisation">
              {(['cuts', 'random'] as const).map((priority) => {
                const plan = flooringOptions[priority];
                const valid = !plan.issues.some((issue) => issue.severity === 'error');
                const selected = f.optimisation === priority;
                return (
                  <button
                    key={priority}
                    type="button"
                    className={selected ? 'active' : ''}
                    aria-pressed={selected}
                    onClick={() => floor('optimisation', priority)}
                  >
                    <span>{priority === 'cuts' ? 'Minimise cuts' : 'Maximise randomness'}</span>
                    <small>
                      {valid
                        ? `${plan.cuts} cuts · ${mm(plan.wastePercent)}% waste`
                        : 'Check measurements'}
                    </small>
                  </button>
                );
              })}
            </div>
          </div>
        )}
        <div className="field">
          <span>Board direction · {room.name}</span>
          <div className="segmented" role="group" aria-label="Board direction">
            <button
              className={room.direction === 0 ? 'active' : ''}
              aria-pressed={room.direction === 0}
              onClick={() => changeRoom((r) => ({ ...r, direction: 0 }))}
            >
              <ArrowRight size={16} aria-hidden="true" /> Along first wall
            </button>
            <button
              className={room.direction === 90 ? 'active' : ''}
              aria-pressed={room.direction === 90}
              onClick={() => changeRoom((r) => ({ ...r, direction: 90 }))}
            >
              <ArrowDown size={16} aria-hidden="true" /> Across first wall
            </button>
          </div>
        </div>
        <NumberField
          label="Wall spacer"
          value={f.gap}
          onChange={(n) => floor('gap', n)}
          hint="Expansion gap between the floorboards and walls. Check your flooring instructions."
        />
        <details className="advanced-settings">
          <summary>Advanced flooring settings</summary>
          <p className="helper material-help">
            Adjust the saw blade width, joint spacing and smallest pieces to suit your flooring.
          </p>
          <div className="field-grid">
            <NumberField
              label="Saw kerf"
              value={f.kerf}
              onChange={(n) => floor('kerf', n)}
              tooltip={kerfHelp}
            />
            <NumberField
              label="Minimum joint offset"
              value={f.minOffset}
              onChange={(n) => floor('minOffset', n)}
            />
            <NumberField
              label="Maximum joint offset"
              value={f.maxOffset}
              onChange={(n) => floor('maxOffset', n)}
            />
            <NumberField
              label="Shortest end piece"
              value={f.minLength}
              onChange={(n) => floor('minLength', n)}
            />
            <NumberField
              label="Narrowest edge row"
              value={f.minWidth}
              onChange={(n) => floor('minWidth', n)}
            />
          </div>
        </details>
      </section>
      <section className="material-section skirting" aria-labelledby="skirting-materials">
        <h3 id="skirting-materials" className="material-heading">
          Skirting boards
        </h3>
        <p className="helper material-help">
          Enter one purchased board length. Door openings are left clear automatically.
        </p>
        <div className="field-grid">
          <NumberField
            label="Skirting board length"
            value={s.stockLength}
            onChange={(n) => skirt('stockLength', n)}
          />
          <NumberField
            label="Skirting thickness"
            value={s.thickness}
            onChange={(n) => skirt('thickness', n)}
          />
        </div>
        <details className="advanced-settings">
          <summary>Advanced skirting settings</summary>
          <div className="field-grid">
            <NumberField
              label="Minimum piece"
              value={s.minLength}
              onChange={(n) => skirt('minLength', n)}
            />
            <NumberField
              label="Skirting saw kerf"
              value={s.kerf}
              onChange={(n) => skirt('kerf', n)}
              tooltip={kerfHelp}
            />
          </div>
        </details>
      </section>
    </>
  );
}