import { useRef, useState, type RefObject } from 'react';
import { Button } from '@consta/uikit/Button';
import { TextField } from '@consta/uikit/TextField';
import { ChoiceGroup } from '@consta/uikit/ChoiceGroup';
import { ColorPicker, hexModel } from '@consta/uikit/ColorPicker';
import { Text } from '@consta/uikit/Text';
import type { DiagramEdgeData, EdgeLineStyle } from './types';

const LINE_STYLE_ITEMS: { label: string; style: EdgeLineStyle }[] = [
  { label: 'Сплошная', style: 'solid' },
  { label: 'Пунктирная', style: 'dashed' },
  { label: 'Точечная', style: 'dotted' },
];

// "Основные цвета для мелкой графики, линий" — two tonal rows (blue, gray)
// meant specifically for lines, shown first.
const GRAPHIC_LINE_PRESETS: { hex: string; label: string }[] = [
  { hex: '#0079C2', label: 'Синий 1' },
  { hex: '#43B7F7', label: 'Синий 2' },
  { hex: '#89CFFF', label: 'Синий 3' },
  { hex: '#75AAC5', label: 'Синий 4' },
  { hex: '#8FD7E4', label: 'Синий 5' },
  { hex: '#004181', label: 'Синий 6' },
  { hex: '#929AA4', label: 'Серый 1' },
  { hex: '#CED2D6', label: 'Серый 2' },
  { hex: '#E9EBED', label: 'Серый 3' },
  { hex: '#FFFFFF', label: 'Серый 4' },
];

// "Дополнительные цвета" — the section palette.css marks as meant for
// lines/small graphics too (single accents), shown after the row above.
const ACCENT_LINE_PRESETS: { hex: string; label: string }[] = [
  { hex: '#B5309A', label: 'Пурпурный' },
  { hex: '#EC5665', label: 'Красный' },
  { hex: '#FFAB66', label: 'Оранжевый' },
  { hex: '#C2DC5B', label: 'Оливковый' },
  { hex: '#32CA88', label: 'Зелёный' },
  { hex: '#22926D', label: 'Тёмно-зелёный' },
  { hex: '#0EBAD5', label: 'Синий' },
  { hex: '#4EE7F4', label: 'Циан' },
  { hex: '#9152E6', label: 'Виолет' },
  { hex: '#9D9AF7', label: 'Лавандовый' },
  { hex: '#E88FDB', label: 'Розовый' },
];

const LINE_COLOR_PRESETS = [...GRAPHIC_LINE_PRESETS, ...ACCENT_LINE_PRESETS];

// "Цвета текста" from palette.css.
const TEXT_COLOR_PRESETS: { hex: string; label: string }[] = [
  { hex: '#0079C2', label: 'Синий' },
  { hex: '#525A64', label: 'Тёмный' },
  { hex: '#929AA4', label: 'Серый' },
  { hex: '#FFFFFF', label: 'Белый' },
];

const DEFAULT_STROKE_WIDTH = 1;
const DEFAULT_BORDER_RADIUS = 5;
const DEFAULT_EDGE_COLOR = '#b1b1b7';
const DEFAULT_TEXT_COLOR = '#FFFFFF';
const DEFAULT_FONT_SIZE = 11;

interface EdgeInspectorProps {
  edgeId: string;
  label: string;
  data: DiagramEdgeData;
  onLabelChange: (label: string) => void;
  onDataChange: (patch: Partial<DiagramEdgeData>) => void;
  onDelete: () => void;
  onBringToFront: () => void;
  onSendToBack: () => void;
}

export function EdgeInspector({
  edgeId,
  label,
  data,
  onLabelChange,
  onDataChange,
  onDelete,
  onBringToFront,
  onSendToBack,
}: EdgeInspectorProps) {
  const [colorPickerOpen, setColorPickerOpen] = useState(false);
  const colorButtonRef = useRef<HTMLDivElement>(null) as RefObject<HTMLDivElement>;
  const currentColor = data.color ?? DEFAULT_EDGE_COLOR;

  const [textColorPickerOpen, setTextColorPickerOpen] = useState(false);
  const textColorButtonRef = useRef<HTMLDivElement>(null) as RefObject<HTMLDivElement>;
  const currentTextColor = data.textColor ?? DEFAULT_TEXT_COLOR;

  return (
    <div className="node-inspector">
      <div className="node-inspector__header">
        <Text size="s" weight="semibold">
          Поток управления (Sequence Flow)
        </Text>
        <Text size="xs" view="secondary" font="mono">
          {edgeId}
        </Text>
      </div>

      <div className="node-inspector__toolbar">
        <Button size="s" view="secondary" label="Удалить" onClick={onDelete} />
      </div>

      <div className="node-inspector__toolbar">
        <Button size="s" view="secondary" label="На передний план" onClick={onBringToFront} />
        <Button size="s" view="secondary" label="На задний план" onClick={onSendToBack} />
      </div>

      <TextField label="Подпись" size="s" value={label} onChange={(value) => onLabelChange(value ?? '')} />

      <div className="node-inspector__field">
        <Text size="xs" view="secondary">
          Цвет линии
        </Text>
        <div className="node-inspector__presets">
          {LINE_COLOR_PRESETS.map(({ hex, label: presetLabel }) => (
            <button
              key={hex}
              type="button"
              title={presetLabel}
              aria-label={presetLabel}
              className={`node-inspector__preset${currentColor === hex ? ' node-inspector__preset--active' : ''}`}
              style={{ background: hex }}
              onClick={() => onDataChange({ color: hex })}
            />
          ))}
        </div>
        <div ref={colorButtonRef} className="node-inspector__color-trigger">
          <Button size="s" view="secondary" label="Настроить цвет" onClick={() => setColorPickerOpen(true)} />
        </div>
        {colorPickerOpen && (
          <ColorPicker
            model={hexModel}
            value={currentColor}
            onChange={(value) => onDataChange({ color: value })}
            anchorRef={colorButtonRef}
            open={colorPickerOpen}
            onOpen={setColorPickerOpen}
          />
        )}
      </div>

      <div className="node-inspector__field">
        <Text size="xs" view="secondary">
          Цвет текста
        </Text>
        <div className="node-inspector__presets">
          {TEXT_COLOR_PRESETS.map(({ hex, label: presetLabel }) => (
            <button
              key={hex}
              type="button"
              title={presetLabel}
              aria-label={presetLabel}
              className={`node-inspector__preset${currentTextColor === hex ? ' node-inspector__preset--active' : ''}`}
              style={{ background: hex }}
              onClick={() => onDataChange({ textColor: hex })}
            />
          ))}
        </div>
        <div ref={textColorButtonRef} className="node-inspector__color-trigger">
          <Button size="s" view="secondary" label="Настроить цвет" onClick={() => setTextColorPickerOpen(true)} />
        </div>
        {textColorPickerOpen && (
          <ColorPicker
            model={hexModel}
            value={currentTextColor}
            onChange={(value) => onDataChange({ textColor: value })}
            anchorRef={textColorButtonRef}
            open={textColorPickerOpen}
            onOpen={setTextColorPickerOpen}
          />
        )}
      </div>

      <TextField
        label="Размер текста"
        type="number"
        size="s"
        min={8}
        max={32}
        value={String(data.fontSize ?? DEFAULT_FONT_SIZE)}
        onChange={(value) => {
          const n = Number(value);
          if (value && !Number.isNaN(n)) onDataChange({ fontSize: n });
        }}
      />

      <TextField
        label="Толщина линии"
        type="number"
        size="s"
        min={1}
        max={8}
        value={String(data.strokeWidth ?? DEFAULT_STROKE_WIDTH)}
        onChange={(value) => {
          const n = Number(value);
          if (value && !Number.isNaN(n)) onDataChange({ strokeWidth: n });
        }}
      />

      <div className="node-inspector__field">
        <Text size="xs" view="secondary">
          Стиль линии
        </Text>
        <ChoiceGroup
          size="xs"
          name={`edge-line-style-${edgeId}`}
          items={LINE_STYLE_ITEMS}
          value={LINE_STYLE_ITEMS.find((item) => item.style === (data.lineStyle ?? 'solid')) ?? null}
          onChange={(item) => onDataChange({ lineStyle: item.style })}
        />
      </div>

      <TextField
        label="Скругление углов"
        type="number"
        size="s"
        min={0}
        max={20}
        value={String(data.borderRadius ?? DEFAULT_BORDER_RADIUS)}
        onChange={(value) => {
          const n = Number(value);
          if (value && !Number.isNaN(n)) onDataChange({ borderRadius: n });
        }}
      />
    </div>
  );
}