"use client";

import * as Tabs from "@radix-ui/react-tabs";
import * as Tooltip from "@radix-ui/react-tooltip";
import {
  ArrowRightIcon,
  ArrowsOutIcon,
  BuildingsIcon,
  CheckIcon,
  CircleNotchIcon,
  CubeIcon,
  EyeIcon,
  EyeSlashIcon,
  GearSixIcon,
  ImageIcon,
  LockSimpleIcon,
  PaperPlaneTiltIcon,
  PlusIcon,
  SlidersHorizontalIcon,
  SparkleIcon,
  UploadSimpleIcon,
  WarningCircleIcon,
} from "@phosphor-icons/react";
import Image from "next/image";
import { FormEvent, useEffect, useMemo, useState } from "react";

import { SettingsCenter } from "@/components/settings-center";
import {
  initialLayers,
  initialMessages,
  styleDirections,
  workflowStages,
} from "@/lib/demo";
import type { ChatMessage } from "@/types/workflow";
import type { SettingsReadiness } from "@/types/settings";

const iconWeight = "regular" as const;
const API_BASE = process.env.NEXT_PUBLIC_API_BASE_URL ?? "http://localhost:8000";

export function WorkflowStudio() {
  const [layers, setLayers] = useState(initialLayers);
  const [selectedDirection, setSelectedDirection] = useState("quiet-modern");
  const [messages, setMessages] = useState<ChatMessage[]>(initialMessages);
  const [draft, setDraft] = useState("");
  const [furnitureMode, setFurnitureMode] = useState<"reference" | "remove">("reference");
  const [settingsOpen, setSettingsOpen] = useState(false);
  const [readiness, setReadiness] = useState<SettingsReadiness | null>(null);

  const currentDirection = useMemo(
    () => styleDirections.find((item) => item.id === selectedDirection) ?? styleDirections[0],
    [selectedDirection],
  );

  useEffect(() => {
    async function loadReadiness() {
      try {
        const response = await fetch(`${API_BASE}/v1/readiness`, { cache: "no-store" });
        if (!response.ok) return;
        const current = await response.json() as SettingsReadiness;
        setReadiness(current);
        if (!current.ready && !window.sessionStorage.getItem("settings-intro-seen")) {
          window.sessionStorage.setItem("settings-intro-seen", "true");
          setSettingsOpen(true);
        }
      } catch {
        setReadiness(null);
      }
    }
    void loadReadiness();
  }, []);

  function toggleLayer(id: string) {
    setLayers((items) =>
      items.map((item) => (item.id === id ? { ...item, visible: !item.visible } : item)),
    );
  }

  function sendMessage(event: FormEvent<HTMLFormElement>) {
    event.preventDefault();
    const value = draft.trim();
    if (!value) return;
    setMessages((items) => [
      ...items,
      { id: `user-${Date.now()}`, role: "user", body: value },
      {
        id: `assistant-${Date.now()}`,
        role: "assistant",
        body: "已记录为设计约束。正式接入后，这条指令会先更新布局锁定和 Style DNA，再只重绘受影响视角。",
        meta: "结构化修改",
      },
    ]);
    setDraft("");
  }

  return (
    <Tooltip.Provider delayDuration={250}>
      <main className="studio-shell">
        <header className="topbar">
          <div className="brand-block">
            <div className="brand-mark" aria-hidden="true">
              <BuildingsIcon size={19} weight="fill" />
            </div>
            <div>
              <p className="brand-name">空间风格工作台</p>
              <p className="brand-subtitle">11-2-104 住宅概念方案</p>
            </div>
          </div>

          <div className="topbar-actions">
            <span className="save-state"><CheckIcon size={14} weight="bold" /> 已保存</span>
            <button className="button button-secondary settings-button" type="button" onClick={() => setSettingsOpen(true)}>
              <GearSixIcon size={16} /> 系统设置
              {readiness && !readiness.ready ? <span className="settings-alert-dot" aria-label="有必备配置未完成" /> : null}
            </button>
            <button className="button button-secondary" type="button">版本记录</button>
            <button
              className="button button-primary"
              type="button"
              disabled={!readiness?.ready}
              onClick={() => { if (!readiness?.ready) setSettingsOpen(true); }}
              title={!readiness?.ready ? "请先完成系统设置" : undefined}
            >
              {readiness?.ready ? "确认结构" : "配置后开始"} <ArrowRightIcon size={16} weight="bold" />
            </button>
          </div>
        </header>

        <div className="studio-grid">
          <aside className="workflow-rail" aria-label="设计流程">
            <div className="rail-heading">
              <p>设计流程</p>
              <span>3 / 8</span>
            </div>
            <nav className="stage-list">
              {workflowStages.map((stage) => (
                <button
                  className={`stage-item stage-${stage.status}`}
                  key={stage.id}
                  type="button"
                  aria-current={stage.status === "active" ? "step" : undefined}
                >
                  <span className="stage-index" aria-hidden="true">
                    {stage.status === "complete" ? <CheckIcon size={13} weight="bold" /> : null}
                  </span>
                  <span className="stage-copy">
                    <strong>{stage.label}</strong>
                    <small>{stage.detail}</small>
                  </span>
                </button>
              ))}
            </nav>

            <div className="rail-note">
              <WarningCircleIcon size={18} weight={iconWeight} />
              <p>有 2 项需要确认，确认后才能生成空间白模。</p>
            </div>
          </aside>

          <section className="workspace">
            <Tabs.Root defaultValue="plan" className="workspace-tabs">
              <div className="workspace-toolbar">
                <Tabs.List className="tab-list" aria-label="工作区视图">
                  <Tabs.Trigger className="tab-trigger" value="plan">
                    <SlidersHorizontalIcon size={16} /> 户型清洗
                  </Tabs.Trigger>
                  <Tabs.Trigger className="tab-trigger" value="blockout">
                    <CubeIcon size={16} /> 3D 白模
                  </Tabs.Trigger>
                  <Tabs.Trigger className="tab-trigger" value="renders">
                    <ImageIcon size={16} /> 效果图
                  </Tabs.Trigger>
                </Tabs.List>

                <div className="canvas-actions">
                  <Tooltip.Root>
                    <Tooltip.Trigger asChild>
                      <button className="icon-button" type="button" aria-label="适应画布">
                        <ArrowsOutIcon size={18} />
                      </button>
                    </Tooltip.Trigger>
                    <Tooltip.Portal><Tooltip.Content className="tooltip">适应画布</Tooltip.Content></Tooltip.Portal>
                  </Tooltip.Root>
                  <button className="button button-secondary compact" type="button">
                    <UploadSimpleIcon size={16} /> 更换图纸
                  </button>
                </div>
              </div>

              <Tabs.Content value="plan" className="tab-content">
                <div className="plan-workspace">
                  <div className="plan-canvas">
                    <div className="canvas-labels">
                      <span>上方住宅户型</span>
                      <span>矢量 PDF · 43 个 CAD 图层</span>
                    </div>
                    <div className="plan-image-frame">
                      <Image
                        src="/sample-plan.png"
                        alt="从真实 PDF 中分离出的住宅建筑结构平面图"
                        fill
                        priority
                        sizes="(max-width: 900px) 100vw, 60vw"
                        className="plan-image"
                      />
                      <div className="region-outline" aria-hidden="true" />
                      <button className="issue-marker issue-one" type="button" aria-label="比例待确认">1</button>
                      <button className="issue-marker issue-two" type="button" aria-label="家具意图待确认">2</button>
                    </div>
                    <div className="canvas-status">
                      <span><CheckIcon size={14} weight="bold" /> 已分离建筑结构</span>
                      <span>比例待交叉校准</span>
                    </div>
                  </div>

                  <aside className="layer-panel">
                    <div className="panel-title-row">
                      <div>
                        <p className="panel-title">图层</p>
                        <p className="panel-caption">保留矢量信息</p>
                      </div>
                      <button className="icon-button small" type="button" aria-label="添加图层">
                        <PlusIcon size={16} />
                      </button>
                    </div>
                    <div className="layer-list">
                      {layers.map((layer) => (
                        <button
                          className={`layer-row ${layer.visible ? "is-visible" : ""}`}
                          key={layer.id}
                          type="button"
                          onClick={() => toggleLayer(layer.id)}
                        >
                          {layer.visible ? <EyeIcon size={17} /> : <EyeSlashIcon size={17} />}
                          <span>{layer.label}</span>
                          {layer.count ? <small>{layer.count}</small> : null}
                        </button>
                      ))}
                    </div>

                    <div className="panel-divider" />
                    <p className="panel-title">原家具处理</p>
                    <div className="segmented-control">
                      <button
                        type="button"
                        className={furnitureMode === "reference" ? "active" : ""}
                        onClick={() => setFurnitureMode("reference")}
                      >保留参考</button>
                      <button
                        type="button"
                        className={furnitureMode === "remove" ? "active" : ""}
                        onClick={() => setFurnitureMode("remove")}
                      >仅看结构</button>
                    </div>
                    <p className="helper-text">家具位置用于理解尺度，不锁定款式和材质。</p>
                  </aside>
                </div>
              </Tabs.Content>

              <Tabs.Content value="blockout" className="tab-content empty-workspace">
                <CubeIcon size={38} weight="thin" />
                <h2>白模将在结构确认后生成</h2>
                <p>系统会拉伸墙体、门窗和柱，并自动建立三个室内相机。</p>
              </Tabs.Content>

              <Tabs.Content value="renders" className="tab-content empty-workspace">
                <ImageIcon size={38} weight="thin" />
                <h2>先选定风格方向</h2>
                <p>低成本方向图通过后，再生成完整多视角效果图。</p>
              </Tabs.Content>
            </Tabs.Root>

            <section className="conversation" aria-label="设计对话">
              <div className="message-stream">
                {messages.slice(-3).map((message) => (
                  <article className={`message message-${message.role}`} key={message.id}>
                    {message.role === "assistant" ? (
                      <span className="assistant-icon"><SparkleIcon size={15} weight="fill" /></span>
                    ) : null}
                    <div>
                      {message.meta ? <small>{message.meta}</small> : null}
                      <p>{message.body}</p>
                    </div>
                  </article>
                ))}
              </div>
              <form className="composer" onSubmit={sendMessage}>
                <label htmlFor="design-instruction">告诉我需要保留什么，或者希望空间给人怎样的感受</label>
                <div className="composer-row">
                  <input
                    id="design-instruction"
                    value={draft}
                    onChange={(event) => setDraft(event.target.value)}
                    placeholder="例如：保留床和窗的位置，客厅更松弛，不要冷灰"
                  />
                  <button className="send-button" type="submit" aria-label="发送设计指令">
                    <PaperPlaneTiltIcon size={18} weight="fill" />
                  </button>
                </div>
              </form>
            </section>
          </section>

          <aside className="style-inspector">
            <div className="inspector-heading">
              <div>
                <p className="panel-title">Style DNA</p>
                <p className="panel-caption">跨视角设计约束</p>
              </div>
              <span className="lock-label"><LockSimpleIcon size={13} /> 2 项锁定</span>
            </div>

            <div className="style-section">
              <label htmlFor="style-concept">设计概念</label>
              <textarea id="style-concept" defaultValue="温暖、克制、带自然材质感的现代住宅" />
            </div>

            <div className="style-section">
              <p className="style-label">方向草案</p>
              <div className="direction-list">
                {styleDirections.map((direction) => (
                  <button
                    type="button"
                    key={direction.id}
                    className={`direction-option ${selectedDirection === direction.id ? "selected" : ""}`}
                    onClick={() => setSelectedDirection(direction.id)}
                  >
                    <span className="direction-colors" aria-hidden="true">
                      {direction.colors.map((color) => (
                        <span key={color} style={{ backgroundColor: color }} />
                      ))}
                    </span>
                    <span>
                      <strong>{direction.name}</strong>
                      <small>{direction.summary}</small>
                    </span>
                    {selectedDirection === direction.id ? <CheckIcon size={15} weight="bold" /> : null}
                  </button>
                ))}
              </div>
            </div>

            <div className="style-section material-section">
              <p className="style-label">材料语言</p>
              <div className="tag-list">
                {currentDirection.materials.map((material) => <span key={material}>{material}</span>)}
                <button type="button"><PlusIcon size={13} /> 添加</button>
              </div>
            </div>

            <div className="style-section constraint-section">
              <p className="style-label">明确避免</p>
              <p>大面积冷灰、高亮岩板、过量灯带</p>
            </div>

            <div className="inspector-footer">
              <div>
                <CircleNotchIcon size={17} />
                <span>等待结构确认</span>
              </div>
              <button className="button button-primary full" type="button">保存风格草案</button>
            </div>
          </aside>
        </div>
        <SettingsCenter
          open={settingsOpen}
          onClose={() => setSettingsOpen(false)}
          onReadinessChange={setReadiness}
        />
      </main>
    </Tooltip.Provider>
  );
}