/**
 * 商品试算页（docs/v2.1/trial-page.md）：采集后的主工作流。
 * 01 商品信息 → 02 价格试算 → 03 俄文文案 → 04 图片与AI生图 → 05 入库与导出。
 * 操作流水线对齐 v1 web 工具台；数据自动落库（products 表）。
 */
import { useCallback, useEffect, useState } from 'react';
import { Link, useParams } from 'react-router';
import { Card, Menu, Space, Spin, Typography, message } from 'antd';
import { getProduct, listAssets, ProductDetail, ProductAsset, updateProduct } from '@/services/product';
import { apiErrorMessage } from '@/services/api';
import { STAGE_COLOR, STAGE_LABEL } from '../collection/CollectionPage';
import TrialInfoPanel from './TrialInfoPanel';
import TrialPricingPanel from './TrialPricingPanel';
import TrialSuitePanel from './TrialSuitePanel';
import TrialExportPanel from './TrialExportPanel';
import CopyPanel from '../product/CopyPanel';

const { Title, Text } = Typography;

const SECTIONS = [
    { id: 'section-info', label: '商品信息' },
    { id: 'section-pricing', label: '价格试算' },
    { id: 'section-copy', label: '俄文文案' },
    { id: 'section-collect', label: '采集图片' },
    { id: 'section-plan', label: '出图方案' },
    { id: 'section-result', label: '生成结果' },
    { id: 'section-export', label: '入库与导出' },
];

export default function TrialPage() {
    const { id } = useParams();
    const [product, setProduct] = useState<ProductDetail | null>(null);
    const [assets, setAssets] = useState<ProductAsset[]>([]);
    const [loading, setLoading] = useState(true);
    const [saving, setSaving] = useState(false);
    const [active, setActive] = useState(SECTIONS[0].id);

    const load = useCallback(async () => {
        if (!id) return;
        setLoading(true);
        try {
            const [p, a] = await Promise.all([getProduct(id), listAssets(id)]);
            setProduct(p);
            setAssets(a);
        } catch (e) {
            message.error(apiErrorMessage(e));
        } finally {
            setLoading(false);
        }
    }, [id]);

    useEffect(() => {
        load();
    }, [load]);

    // 滚动监听：高亮当前区域
    useEffect(() => {
        const onScroll = () => {
            let current = SECTIONS[0].id;
            for (const s of SECTIONS) {
                const el = document.getElementById(s.id);
                if (el && el.getBoundingClientRect().top <= 90) current = s.id;
            }
            setActive(current);
        };
        window.addEventListener('scroll', onScroll, { passive: true });
        return () => window.removeEventListener('scroll', onScroll);
    }, []);

    const save = useCallback(
        async (partial: Partial<ProductDetail>) => {
            if (!id || !product) return;
            setSaving(true);
            try {
                const updated = await updateProduct(id, partial);
                setProduct(updated);
            } catch (e) {
                message.error(apiErrorMessage(e));
            } finally {
                setSaving(false);
            }
        },
        [id, product],
    );

    if (loading || !product) {
        return (
            <div style={{ padding: 80, textAlign: 'center' }}>
                <Spin size="large" />
            </div>
        );
    }

    const raw = (product.raw ?? {}) as Record<string, unknown>;
    const titleZh = ((raw.title_zh as string) ?? (raw.title as string) ?? '').trim();

    return (
        <div style={{ display: 'flex', gap: 16 }}>
            <div style={{ flex: 1, minWidth: 0, display: 'flex', flexDirection: 'column', gap: 16 }}>
                <div>
                    <div style={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between' }}>
                        <Space>
                            <Title level={4} style={{ margin: 0 }}>
                                {titleZh || product.name || '(未命名商品)'}
                            </Title>
                            <span style={{ color: STAGE_COLOR[product.stage] }}>
                                {STAGE_LABEL[product.stage] || product.stage}
                            </span>
                        </Space>
                        <Text type="secondary">{saving ? '保存中…' : '已自动保存'}</Text>
                    </div>
                    <Space size={16} style={{ marginTop: 4 }}>
                        {product.name && product.name !== titleZh && (
                            <Text type="secondary" ellipsis={{ tooltip: product.name }} style={{ maxWidth: 420 }}>
                                俄文：{product.name}
                            </Text>
                        )}
                        <Link to={`/product/${product.id}`}>进入商品编辑页 →</Link>
                    </Space>
                </div>

                {/* key 随商品切换：面板本地状态（表单/方案/勾选）一次性初始化，避免保存回显互相覆盖 */}
                <div id="section-info">
                    <Card title="1 商品信息">
                        <TrialInfoPanel key={`info-${product.id}`} product={product} onSave={save} />
                    </Card>
                </div>
                <div id="section-pricing">
                    <Card title="2 价格试算">
                        <TrialPricingPanel key={`pricing-${product.id}`} product={product} onSave={save} />
                    </Card>
                </div>
                <div id="section-copy">
                    <Card title="3 俄文文案（AI）">
                        <CopyPanel product={product} onSave={save} leftSpan={11} rightSpan={13} />
                    </Card>
                </div>
                {/* 4/5/6 三张卡片由 TrialSuitePanel 渲染，锚点在面板内部 */}
                <TrialSuitePanel product={product} assets={assets} onRefreshAssets={load} />
                <div id="section-export">
                    <Card title="7 入库与导出">
                        <TrialExportPanel product={product} />
                    </Card>
                </div>
            </div>

            {/* 右侧区域导航 */}
            <div style={{ width: 120, flexShrink: 0 }}>
                <div style={{ position: 'sticky', top: 80 }}>
                    <Menu
                        mode="inline"
                        selectedKeys={[active]}
                        style={{ borderInlineEnd: 0, background: 'transparent' }}
                        items={SECTIONS.map((s) => ({ key: s.id, label: s.label }))}
                        onClick={({ key }) => {
                            document.getElementById(key)?.scrollIntoView({ behavior: 'smooth', block: 'start' });
                        }}
                    />
                </div>
            </div>
        </div>
    );
}