/**
 * 片段调速面板 — Drawer 形式
 * 速度滑块（0.25x ~ 4x）+ 预设快捷按钮 + 音调修正开关
 * 支持应用到当前片段 / 所有片段
 */
import React, { useCallback } from "react"
import { Drawer, Slider } from "antd"
import type { SpeedConfig } from "../types"
import { DEFAULT_SPEED } from "../types"

/* ──────────── 预设速度 ──────────── */
const SPEED_PRESETS: { rate: number; label: string }[] = [
  { rate: 0.5, label: "0.5x" },
  { rate: 1.0, label: "1x" },
  { rate: 1.5, label: "1.5x" },
  { rate: 2.0, label: "2x" },
]

/* ──────────── Props ──────────── */
interface SpeedPanelProps {
  open: boolean
  onClose: () => void
  /** 当前片段调速配置 */
  config: SpeedConfig
  onChange: (config: SpeedConfig) => void
  /** 应用到所有片段 */
  onApplyAll?: (config: SpeedConfig) => void
}

const SpeedPanel: React.FC<SpeedPanelProps> = ({ open, onClose, config, onChange, onApplyAll }) => {
  /* ── 修改速度 ── */
  const handleChangeRate = useCallback(
    (rate: number) => {
      onChange({ ...config, rate })
    },
    [config, onChange],
  )

  /* ── 切换音调修正 ── */
  const handleTogglePitch = useCallback(() => {
    onChange({ ...config, pitchCorrection: !config.pitchCorrection })
  }, [config, onChange])

  /* ── 选择预设 ── */
  const handlePreset = useCallback(
    (rate: number) => {
      onChange({ ...config, rate })
    },
    [config, onChange],
  )

  /* ── 应用到所有片段 ── */
  const handleApplyAll = useCallback(() => {
    onApplyAll?.(config)
  }, [config, onApplyAll])

  /* ── 重置 ── */
  const handleReset = useCallback(() => {
    onChange({ ...DEFAULT_SPEED })
  }, [onChange])

  /* ── 速度描述文字 ── */
  const speedLabel =
    config.rate < 1
      ? "慢速（慢动作）"
      : config.rate === 1
        ? "原速"
        : config.rate < 2
          ? "快速"
          : "极速"

  return (
    <Drawer
      title="⚡ 片段调速"
      placement="right"
      width={380}
      open={open}
      onClose={onClose}
      className="speed-panel-drawer"
    >
      {/* ── 速度滑块 ── */}
      <div className="sp-speed-section">
        <div className="sp-speed-header">
          <span className="sp-speed-label">播放速度</span>
          <span className="sp-speed-value">{config.rate.toFixed(2)}x</span>
        </div>
        <Slider
          min={0.25}
          max={4.0}
          step={0.05}
          value={config.rate}
          onChange={handleChangeRate}
          tooltip={{ formatter: (v) => `${(v as number).toFixed(2)}x` }}
        />
        <div className="sp-speed-marks">
          <span>0.25x</span>
          <span>1x</span>
          <span>2x</span>
          <span>4x</span>
        </div>
        <div className="sp-speed-desc">{speedLabel}</div>
      </div>

      {/* ── 预设快捷按钮 ── */}
      <div className="sp-presets">
        <div className="sp-presets-label">快捷预设</div>
        <div className="sp-presets-row">
          {SPEED_PRESETS.map((p) => (
            <button
              key={p.rate}
              className={`sp-preset-btn${Math.abs(config.rate - p.rate) < 0.01 ? " active" : ""}`}
              onClick={() => handlePreset(p.rate)}
            >
              {p.label}
            </button>
          ))}
        </div>
      </div>

      {/* ── 音调修正开关 ── */}
      <div className="sp-pitch-section">
        <div className="sp-pitch-info">
          <span className="sp-pitch-label">音调修正</span>
          <span className="sp-pitch-desc">
            {config.pitchCorrection ? "变速不变调（推荐）" : "变速同时变调"}
          </span>
        </div>
        <div
          className={`ep-toggle${config.pitchCorrection ? " active" : ""}`}
          onClick={handleTogglePitch}
        >
          <div className="ep-toggle-knob" />
        </div>
      </div>

      {/* ── 底部操作 ── */}
      <div className="sp-footer">
        <button className="sp-reset-btn" onClick={handleReset}>
          重置原速
        </button>
        {onApplyAll && (
          <button className="sp-apply-all-btn" onClick={handleApplyAll}>
            应用到所有片段
          </button>
        )}
      </div>
    </Drawer>
  )
}

export default SpeedPanel