import { EXRCubeTexture } from '@babylonjs/core';
import apiConfig from './src/config.js';
import { setSkuMapping, getSkuByModelId, clearSkuMapping, clearAllSkuMappings } from './src/skuMapping.js';

// 存储 kernel 实例
let kernelInstance = null;

// 导出 SKU 映射相关函数，方便外部使用
export { getSkuByModelId, clearSkuMapping, clearAllSkuMappings };

/**
 * 初始化应用逻辑 - 注入 kernel 实例
 * @param {Object} kernel - SDK kernel 实例
 * @returns {Object} kernel 实例
 */
export const initApp = (kernel) => {
    if (!kernel) {
        throw new Error('kernel 实例是必需的');
    }
    kernelInstance = kernel;
    console.log('应用逻辑已初始化，kernel 实例已注入');
    return kernelInstance;
};


//全局唯一棚子sku
let pergolaSku = ""

/**
 * 获取当前 kernel 实例
 */
const getKernel = () => {
    if (!kernelInstance) {
        throw new Error('请先调用 initApp(kernel) 初始化 kernel 实例');
    }
    return kernelInstance;
};

//初始化
export const init = async (customConfig = {}) => {
    const kernel = getKernel();

    const defaultConfig = {
        container: document.querySelector('#renderDom'),
        modelUrlList: [],
        env: { envPath: 'https://cdn.files.zguiy.com/zt/environment.env', intensity: 1.2, rotationY: 0.3, background: false },
        gizmo: {
            position: false,
            rotation: false,
            scale: false
        },
        outline: {
            enable: true,
            color: "#2196F3",
            thickness: 1,
            occlusionStrength: 0.1,
            occlusionThreshold: 0.0002
        }
    };

    // 合并用户自定义配置
    const config = { ...defaultConfig, ...customConfig };
    kernel.init(config);
}

//初始化加载模型
export const getAutoLoadModelList = async () => {
    const kernel = getKernel();

    const url = apiConfig.getApiUrl('/api/models/auto-load/list')
    const response = await fetch(url)
    const data = await response.json()
    const models = data.data  // 这就是模型列表

    models.forEach(model => {

        if (model.placement_zone) {
            const { alpha, border_color, color, show_border, thickness, walls } = model.placement_zone

            kernel.dropZone.setData({

                color: color,
                alpha: +alpha,
                thickness: thickness,
                showBorder: !show_border,
                borderColor: border_color,
                walls: walls
            });
        }

        kernel.model.add({
            modelName: model.name + '_' + model.category,
            modelId: model.category,
            modelUrl: model.file_url,
            modelControlType: model.model_control_type,

        });
    })
}

//获取放置区域
export const getPlacementZone = async (sku) => {
    //pergolaSku 是需要在加载棚子的时取其引用，传进来的sku则是配件的sku，根据配件的sku来判断放置区域
    const kernel = getKernel();
    let division_include = []
    // 同时包含10和13
    const only10_13 = /(?=.*10)(?=.*13)/.test(pergolaSku)
    // 只包含10 无13 无12
    const only10 = /(?=.*10)(?!.*13)(?!.*12)/.test(pergolaSku)
    // 同时包含10和12
    const only10_12 = /(?=.*10)(?=.*12)/.test(pergolaSku)

    // 1. 只要字符串里包含 10，就返回 true
    const has10 = /10/.test(sku);

    // 2. 只要字符串里包含 13，就返回 true
    const has13 = /13/.test(sku);

    // 2. 只要字符串里包含 12，就返回 true
    const has12 = /12/.test(sku);

    //棚子包含10，不包含13 并且配件是10  说明是正方体 或者是10*20的
    if (only10 && has10) {
        division_include.push('前', '后', '左', '右', "前1", "后1", "前2", "后2")
    }
    //棚子同时包10和13的并且含配件是10
    if (only10_13 && has10) {
        division_include.push('左', '右')
    }
    //棚子同时包10和13的并且含配件是13
    if (only10_13 && has13) {
        division_include.push('前', '后')
    }
    //棚子同时包10和12的并且含配件是12
    if (only10_12 && has12) {
        division_include.push('前', '后')
    }
    //棚子同时包10和12的并且含配件是10
    if (only10_12 && has10) {
        division_include.push('左', '右')
    }

    const response = await fetch(apiConfig.getApiUrl(`/api/product-configs/by-sku/${sku}`));
    const result = await response.json();
    if (result.code === 200) {
        // await initPlacementZoneConfig();
        const { enable_placement_zone, wall_divisions } = result.data;
        // const {position_x, position_y, position_z} = data;
        if (enable_placement_zone && wall_divisions != undefined) {
            console.log(wall_divisions);

            const filteredDivisions = wall_divisions.filter(item => division_include.includes(item.name))
            console.log(filteredDivisions);
            // 只清除旧的放置区域网格，不清除模型
            kernel.dropZone.clearZones();
            const divisions = filteredDivisions.map(wall => ({
                name: wall.name,
                divisions: wall.divisions
            }))

            kernel.dropZone.updateDivisions(divisions);
            // 显示放置区域
            kernel.dropZone.show();
        }
    }
}

//执行事件
export const getEvent = async (dropzone_data, sku) => {

    // 将模型放置到该区域
    try {
        const response = await fetch(apiConfig.getApiUrl(`/api/product-configs/by-sku/${sku}`));
        const result = await response.json();

        if (result.code === 200 && result.data) {
            console.log('SKU配置数据:', result.data);
            console.log('关联事件:', result.data.events);

            // 使用 for...of 循环以支持 await
            await executeEvent(dropzone_data, result, sku)
        } else {
            console.log(`未查询到数据`);
        }
    } catch (error) {
        console.error(`查询SKU配置或替换模型失败:`, error);
    }
}

//点击放置区域执行事件 一般是换配件
export const executeEvent = async (dropzone_data, result, sku) => {
    const kernel = getKernel();

    const { wallName, index, transform } = dropzone_data;
    const { position, rotation } = transform;

    let modelId = null;  // 在外部声明，用于在两个循环之间传递
    let modelName = null;
    let pergolaSku = null;  // 用于存储棚子的 SKU

    // 第一次循环：处理 change_model
    for (const event of result.data.events) {
        if (event.event_type === 'change_model') {
            const { name, file_url, model_control_type, category } = event.target_data;

            // 生成唯一的模型ID
            modelId = Date.now();
            modelName = name;
            kernel.dropZone.recordModelPlacement(wallName, index, name + '_' + modelId);

            // 记录模型ID到SKU的映射
            setSkuMapping(modelId, sku);

            await kernel.model.add({
                modelName: name,
                modelId: modelId,
                modelUrl: file_url,
                modelControlType: model_control_type,
                drag: {
                    enable: true,
                    axis: rotation.y === 0 || rotation.y === 180 ? 'x' : 'z',
                    step: 0.1,
                    boundaryConstraint: true,  // 启用边界限制
                    snapToZone: true,  // 启用拖拽吸附到最近的分割区域
                    // 拖拽到已占用区域时的行为：'return' 返回原位置，'replace' 替换目标位置的模型（默认 'return'）
                    onOccupiedZone: 'replace'
                },
                transform: {
                    position: position,
                    rotation: rotation,
                }
            });

            console.log(`百叶模型已放置为 ${name + '_' + modelId}`);
        }
    }

    // 第二次循环：处理 change_color（此时模型已加载完成）
    for (const event of result.data.events) {
        if (event.event_type === 'change_color') {
            const materialName = event.material_name;
            const { color, color_map_url, normal_map_url, metallic, roughness } = event.target_data;

            kernel.material.apply({
                target: materialName,
                modelId: modelName + '_' + modelId,  // 传入 modelId，只替换该模型的材质
                albedoColor: color,
                albedoTexture: color_map_url,
                normalMap: normal_map_url,
                metallic: +metallic,
                roughness: +roughness
            });

            console.log(`百叶模型颜色已替换为 ${color}`);
        }
    }

    // 查找棚子的 SKU（从已加载的模型中查找 model_control_type 为 'pergola' 的模型）
    const allModels = kernel.model.getAllMetadata();
    for (const model of allModels) {
        if (model.modelControlType === 'pergola') {
            pergolaSku = getSkuByModelId(model.modelId);
            if (pergolaSku) {
                break;
            }
        }
    }

    console.log('当前棚子的 SKU:', pergolaSku);
    return pergolaSku;
}


//一般是换棚子/换颜色/设置放置区域
export const executeEvent2 = async (result, sku) => {
    const kernel = getKernel();

    // 检查是否有模型更换事件
    const hasModelChange = result.data.events.some(e => e.event_type === 'change_model');

    // 检查新模型是否已经存在
    let modelAlreadyExists = false;
    if (hasModelChange) {
        const firstModelEvent = result.data.events.find(e => e.event_type === 'change_model');
        if (firstModelEvent && firstModelEvent.target_data) {
            const { name, category } = firstModelEvent.target_data;
            modelAlreadyExists = kernel.model.exists(name + '_' + category);
            console.log(`检查模型 ${name + '_' + category} 是否存在:`, modelAlreadyExists);
        }
    }
    kernel.dropZone.hide();
    // 只有在需要更换模型且模型不存在时才清除
    if (hasModelChange && !modelAlreadyExists) {
        console.log('模型不存在，执行清除操作');

        kernel.model.removeAll();
        // 清除所有 SKU 映射
        clearAllSkuMappings();
    }

    // 先处理所有 change_model 事件
    for (const event of result.data.events) {
        console.log(event);

        if (event.event_type === 'change_model') {
            const { target_data } = event;
            console.log(event.target_data);
            if (!target_data) {
                console.error('change_model事件缺少target_data')
                return;
            };

            const { id, name, file_url, model_control_type, category, placement_zone } = target_data;
            // 如果模型已存在，跳过加载
            if (modelAlreadyExists) {
                console.log(`模型 ${name + '_' + category} 已存在，跳过加载`);
                continue;
            }

            if (placement_zone) {
                const { alpha, border_color, color, show_border, thickness, walls } = placement_zone
                kernel.dropZone.setData({
                    color: color,
                    alpha: +alpha,
                    thickness: thickness,
                    showBorder: !show_border,
                    borderColor: border_color,
                    walls: walls
                });
            }

            // 记录模型ID到SKU的映射
            setSkuMapping(category, sku);

            // 加载并放置模型（使用 category 作为 modelId）
            await kernel.model.add({
                modelName: name,
                modelId: category,
                modelUrl: file_url,
                modelControlType: model_control_type,
            })

            console.log(`模型已放置为 ${name + '_' + category}`);
        }
    }

    // 等待模型加载完成后，再处理 change_color 事件
    for (const event of result.data.events) {
        if (event.event_type === 'change_color') {
            const materialName = event.material_name;
            const { color, color_map_url, normal_map_url, metallic, roughness } = event.target_data;
            console.log('替换模型颜色:', event.target_data);

            kernel.material.apply({
                target: materialName,
                albedoColor: color,
                albedoTexture: color_map_url,
                normalMap: normal_map_url,
            });

            console.log(`百叶模型颜色已替换为 ${color}`);
        }
    }

}

//加载热点
export const getHotspot = async () => {
    const kernel = getKernel();

    try {
        // 从后端获取激活状态的热点列表
        const response = await fetch(apiConfig.getApiUrl('/api/hotspots?status=active&page=1&pageSize=100'));
        const result = await response.json();

        if (result.code === 200 && result.data.list.length > 0) {
            // 将后端数据转换为 SDK 需要的格式
            const hotspots = result.data.list.map(item => ({
                id: item.id,
                type: 'hotspot',
                name: item.name,
                meshName: item.name, // 可以根据实际情况调整
                icon: item.image_url,
                position: [item.position_x, item.position_y, item.position_z],
                radius: item.radius,
                color: "#000000",
                payload: {
                    skus: item.skus || [],
                },
            }));

            // 渲染热点
            kernel.hotspot.render(hotspots);
            console.log('热点渲染成功:', hotspots);
        } else {
            console.log('没有可用的热点数据');
        }
    } catch (error) {
        console.error('获取热点数据失败:', error);
    }
}
//点击右侧按钮自动判断
export const getProductConfig = async (sku) => {
    try {
        const response = await fetch(`${apiConfig.getApiUrl(`/api/product-configs/by-sku/${sku}`)}`);
        const result = await response.json();
        if (result.code === 200) {
            console.log(result.data);
            const { enable_placement_zone } = result.data;
            //如果触发的是配件，需要显示放置区域

            if (enable_placement_zone) {
                if (pergolaSku === "") {
                    console.error("请先加载棚子模型")
                    return;
                }
                getPlacementZone(sku)
            }
            //如果触发的是换棚子模型
            else {
                pergolaSku = sku;
                executeEvent2(result, sku)
            }
        }
    } catch (error) {
        console.error('获取产品配置失败:', error);
    }
}