"use client";

import { ReaderSettings, TTSSettings } from "@/lib/types";
import { X, Sun, Moon, BookOpen } from "lucide-react";

interface SettingsPanelProps {
  isOpen: boolean;
  onClose: () => void;
  readerSettings: ReaderSettings;
  onReaderSettingsChange: (settings: ReaderSettings) => void;
  ttsSettings: TTSSettings;
  onTTSSettingsChange: (settings: TTSSettings) => void;
  availableVoices: SpeechSynthesisVoice[];
}

export function SettingsPanel({
  isOpen,
  onClose,
  readerSettings,
  onReaderSettingsChange,
  ttsSettings,
  onTTSSettingsChange,
  availableVoices,
}: SettingsPanelProps) {
  if (!isOpen) return null;

  return (
    <>
      {/* Backdrop */}
      <div
        className="fixed inset-0 bg-black/50 z-40"
        onClick={onClose}
      />

      {/* Panel */}
      <div className="fixed right-0 top-0 h-full w-full max-w-md bg-[var(--background)] border-l border-[var(--border)] z-50 overflow-y-auto">
        <div className="p-6">
          <div className="flex items-center justify-between mb-6">
            <h2 className="text-xl font-semibold">Settings</h2>
            <button
              onClick={onClose}
              className="p-2 rounded hover:bg-[var(--surface)] transition-colors"
            >
              <X className="w-5 h-5" />
            </button>
          </div>

          {/* Theme */}
          <section className="mb-8">
            <h3 className="text-sm font-medium text-[var(--muted)] uppercase tracking-wide mb-4">
              Theme
            </h3>
            <div className="flex gap-2">
              {[
                { value: "dark", icon: Moon, label: "Dark" },
                { value: "light", icon: Sun, label: "Light" },
                { value: "sepia", icon: BookOpen, label: "Sepia" },
              ].map(({ value, icon: Icon, label }) => (
                <button
                  key={value}
                  onClick={() =>
                    onReaderSettingsChange({
                      ...readerSettings,
                      theme: value as ReaderSettings["theme"],
                    })
                  }
                  className={`flex-1 flex flex-col items-center gap-2 p-4 rounded-lg border transition-colors ${
                    readerSettings.theme === value
                      ? "border-[var(--accent)] bg-[var(--accent)]/10"
                      : "border-[var(--border)] hover:border-[var(--muted)]"
                  }`}
                >
                  <Icon className="w-5 h-5" />
                  <span className="text-sm">{label}</span>
                </button>
              ))}
            </div>
          </section>

          {/* Font Size */}
          <section className="mb-8">
            <h3 className="text-sm font-medium text-[var(--muted)] uppercase tracking-wide mb-4">
              Font Size: {readerSettings.fontSize}px
            </h3>
            <input
              type="range"
              min="14"
              max="32"
              value={readerSettings.fontSize}
              onChange={(e) =>
                onReaderSettingsChange({
                  ...readerSettings,
                  fontSize: parseInt(e.target.value),
                })
              }
              className="w-full accent-[var(--accent)]"
            />
            <div className="flex justify-between text-xs text-[var(--muted)] mt-1">
              <span>14px</span>
              <span>32px</span>
            </div>
          </section>

          {/* Font Family */}
          <section className="mb-8">
            <h3 className="text-sm font-medium text-[var(--muted)] uppercase tracking-wide mb-4">
              Font
            </h3>
            <div className="grid grid-cols-2 gap-2">
              {[
                { value: "serif", label: "Serif", sample: "Georgia" },
                { value: "sans", label: "Sans", sample: "Helvetica" },
                { value: "mono", label: "Mono", sample: "Monaco" },
                { value: "system", label: "System", sample: "Default" },
              ].map(({ value, label, sample }) => (
                <button
                  key={value}
                  onClick={() =>
                    onReaderSettingsChange({
                      ...readerSettings,
                      fontFamily: value as ReaderSettings["fontFamily"],
                    })
                  }
                  className={`p-3 rounded-lg border text-left transition-colors ${
                    readerSettings.fontFamily === value
                      ? "border-[var(--accent)] bg-[var(--accent)]/10"
                      : "border-[var(--border)] hover:border-[var(--muted)]"
                  }`}
                >
                  <div className={`font-${value} text-lg`}>{label}</div>
                  <div className="text-xs text-[var(--muted)]">{sample}</div>
                </button>
              ))}
            </div>
          </section>

          {/* Line Height */}
          <section className="mb-8">
            <h3 className="text-sm font-medium text-[var(--muted)] uppercase tracking-wide mb-4">
              Line Height: {readerSettings.lineHeight}
            </h3>
            <input
              type="range"
              min="1.4"
              max="2.2"
              step="0.1"
              value={readerSettings.lineHeight}
              onChange={(e) =>
                onReaderSettingsChange({
                  ...readerSettings,
                  lineHeight: parseFloat(e.target.value),
                })
              }
              className="w-full accent-[var(--accent)]"
            />
            <div className="flex justify-between text-xs text-[var(--muted)] mt-1">
              <span>Tight</span>
              <span>Loose</span>
            </div>
          </section>

          {/* Content Width */}
          <section className="mb-8">
            <h3 className="text-sm font-medium text-[var(--muted)] uppercase tracking-wide mb-4">
              Content Width: {readerSettings.maxWidth}px
            </h3>
            <input
              type="range"
              min="500"
              max="900"
              step="50"
              value={readerSettings.maxWidth}
              onChange={(e) =>
                onReaderSettingsChange({
                  ...readerSettings,
                  maxWidth: parseInt(e.target.value),
                })
              }
              className="w-full accent-[var(--accent)]"
            />
            <div className="flex justify-between text-xs text-[var(--muted)] mt-1">
              <span>Narrow</span>
              <span>Wide</span>
            </div>
          </section>

          <hr className="border-[var(--border)] my-8" />

          {/* TTS Settings */}
          <section className="mb-8">
            <h3 className="text-sm font-medium text-[var(--muted)] uppercase tracking-wide mb-4">
              Text-to-Speech Engine
            </h3>
            <div className="grid grid-cols-3 gap-2">
              {[
                { value: "edge", label: "Edge", desc: "Fast, natural" },
                { value: "kokoro", label: "Kokoro", desc: "High quality" },
                { value: "browser", label: "Browser", desc: "Built-in" },
              ].map(({ value, label, desc }) => (
                <button
                  key={value}
                  onClick={() =>
                    onTTSSettingsChange({
                      ...ttsSettings,
                      engine: value as TTSSettings["engine"],
                    })
                  }
                  className={`p-3 rounded-lg border transition-colors text-left ${
                    ttsSettings.engine === value
                      ? "border-[var(--accent)] bg-[var(--accent)]/10"
                      : "border-[var(--border)] hover:border-[var(--muted)]"
                  }`}
                >
                  <div className="font-medium">{label}</div>
                  <div className="text-xs text-[var(--muted)]">{desc}</div>
                </button>
              ))}
            </div>
          </section>

          {/* TTS Speed */}
          <section className="mb-8">
            <h3 className="text-sm font-medium text-[var(--muted)] uppercase tracking-wide mb-4">
              TTS Speed: {ttsSettings.speed}x
            </h3>
            <input
              type="range"
              min="0.5"
              max="3"
              step="0.1"
              value={ttsSettings.speed}
              onChange={(e) =>
                onTTSSettingsChange({
                  ...ttsSettings,
                  speed: parseFloat(e.target.value),
                })
              }
              className="w-full accent-[var(--accent)]"
            />
            <div className="flex justify-between text-xs text-[var(--muted)] mt-1">
              <span>0.5x</span>
              <span>3x</span>
            </div>
          </section>

          {/* Browser Voice Selection */}
          {ttsSettings.engine === "browser" && availableVoices.length > 0 && (
            <section className="mb-8">
              <h3 className="text-sm font-medium text-[var(--muted)] uppercase tracking-wide mb-4">
                Voice
              </h3>
              <select
                value={ttsSettings.voice}
                onChange={(e) =>
                  onTTSSettingsChange({
                    ...ttsSettings,
                    voice: e.target.value,
                  })
                }
                className="w-full p-3 rounded-lg border border-[var(--border)] bg-[var(--background)] text-[var(--foreground)]"
              >
                <option value="">Default</option>
                {availableVoices.map((voice) => (
                  <option key={voice.voiceURI} value={voice.voiceURI}>
                    {voice.name} ({voice.lang})
                  </option>
                ))}
              </select>
            </section>
          )}

          {/* Edge TTS info */}
          {ttsSettings.engine === "edge" && (
            <section className="mb-8">
              <p className="text-sm text-[var(--muted)]">
                Uses Microsoft neural voices via Edge TTS. Fast and natural sounding.
                Requires the edge-tts Docker container running on the server.
              </p>
            </section>
          )}

          {/* Kokoro info */}
          {ttsSettings.engine === "kokoro" && (
            <section className="mb-8">
              <p className="text-sm text-[var(--muted)]">
                High quality local TTS. Slower as it generates full audio before playing.
                Requires the kokoro Docker container running on the server.
              </p>
            </section>
          )}
        </div>
      </div>
    </>
  );
}