import BaseModel from './BaseModel';
import { index, getModelForClass, prop, DocumentType, modelOptions } from '@typegoose/typegoose';
const _ = require('underscore');

@index({ roleId: 1, id: 1 })
@index({ seqId: 1 })
@modelOptions({ schemaOptions: { id: false } })
export default class Item extends BaseModel {
    @prop({ required: true, default: '' })
    roleId: string;					// 角色 id
    @prop({ required: true, default: '' })
    roleName: string;				// 角色名称

    @prop({ required: true, default: '' })
    id: number;				  // 道具 id
    @prop({ required: true, default: '' })
    type: number;						// 道具类型
    @prop({ required: true, default: '' })
    itemName: string;			  // 道具名称
    @prop({ required: true, default: 0 })
    hid: number;			      // 将魂：武将id，其他：0
    @prop({ required: true })
    count: number;			    // 道具数量


    public static async findbyRole(roleId: string, lean = true) {
        const items: ItemType[] = await ItemModel.find({ roleId }).select('id count type').lean(lean);
        return items;
    }

    public static async findbyRoleAndIds(roleId: string, ids: Array<number>, lean = true) {
        const items: ItemType[] = await ItemModel.find({ roleId, id: { $in: ids } }).select('id count type').lean(lean);
        return items;
    }

    public static async findByRoleAndType(roleId: string, type: number, lean = true) {
        const items: ItemType[] = await ItemModel.find({ roleId, type }).select('id count type').sort({ id: 1 }).lean(lean);
        return items;
    }

    public static async findbyRoleAndGidAndCount(roleId: string, id: number, count: number, lean = true) {
        const items: ItemType = await ItemModel.findOne({ roleId, id, count: { $gte: count } }).select('id count type').lean(lean);
        return items;
    }

    public static async increaseItem(roleId: string, id: number, count: number, itemInfo: { roleId: string, roleName: string, id: number, itemName: string, type: number, hid?: number }, lean = true) {
        const doc = new ItemModel();
        const setOnInsert = Object.assign(doc.toJSON(), itemInfo);
        const items: ItemType = await ItemModel.findOneAndUpdate({ roleId, id }, { $setOnInsert: setOnInsert, $inc: { count } }, { new: true, upsert: true }).lean(lean);
        return items;
    }

    public static async decreaseItems(roleId: string, items: Array<{ id: number, count: number, ratio?: number }>, lean = true) {
        let updateItems = new Array<{ id: number, count: number, ratio?: number }>(), hasError: boolean = false, result = new Array();
        for (let { id, count, ratio } of items) {
            let rec: ItemType;
            if (!ratio) {
                rec = await ItemModel.findOneAndUpdate({ roleId, id, count: { $gte: count } }, { $inc: { count: -1 * count } }, { new: true }).lean(lean);
            } else {
                rec = await ItemModel.findOneAndUpdate({ roleId, id }, { $inc: { count: ratio * count } }, { new: true, upsert: true }).lean(lean);
            }
            if (!!rec) {
                let index = _.findIndex(result,{id})
                if (!!result[index]) {
                    result[index] = { id: rec.id, count: rec.count }
                } else {
                    result.push({ id: rec.id, count: rec.count });
                }
                updateItems.push({ id, count, ratio });
            } else {
                hasError = true; break;
            }
        }
        if (hasError) { // 数量不足
            for (let { id, count, ratio } of updateItems) {
                if (!ratio) ratio = -1;
                await ItemModel.findOneAndUpdate({ roleId, id }, { $inc: { count: -ratio * count } }, { new: true }).lean(lean);
            }
            return { hasError: true }
        } else {
            return { hasError: false, result }
        }
    }
    // public static async decreaseItems(roleId: string, items: Array<{ id: number, count: number, ratio?: number}>, lean = true) {
    //     const transaction = new Transaction();
    //     let hasError: boolean = false, result = new Array();
    //     try {
    //         for (let { id, count, ratio } of items) {
    //             if (ratio) ratio = -1;
    //             await transaction.update({ roleId, id, count: { $gte: count } }, { $inc: { count: ratio * count } }, { new: true});
    //             //const rec: ItemType = await transaction.findOneAndUpdate({ roleId, id, count: { $gte: count } }, { $inc: { count: ratio * count } }, { new: true}).lean(lean);
    //             // if (!!rec) {
    //             //     result.push({ id: rec.id, count: rec.count });
    //             // } else {
    //             //     hasError = true; break;
    //             // }
    //         }
    //         await transaction.run();
    //         return {hasError, result};
    //     } catch (error) {
    //         await transaction.rollback().catch(console.error);
    //         transaction.clean();
    //         return {error};
    //     }
    // }

    public static async deleteAccount(roleId: string) {
        let result = await ItemModel.deleteMany({ roleId });
        return result;
    }
}


export const ItemModel = getModelForClass(Item);

export interface ItemType extends Pick<DocumentType<Item>, keyof Item> {
    id: number;
};