// Copyright 2022 The Casdoor Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import React from "react";
import {Button, Descriptions, Spin} from "antd";
import i18next from "i18next";
import * as ProductBackend from "./backend/ProductBackend";
import * as ProviderBackend from "./backend/ProviderBackend";
import * as Provider from "./auth/Provider";
import * as Setting from "./Setting";

class ProductBuyPage extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      classes: props,
      productName: props.match?.params.productName,
      product: null,
      providers: [],
      isPlacingOrder: false,
    };
  }

  UNSAFE_componentWillMount() {
    this.getProduct();
    this.getPaymentProviders();
  }

  getProduct() {
    ProductBackend.getProduct("admin", this.state.productName)
      .then((product) => {
        this.setState({
          product: product,
        });
      });
  }

  getPaymentProviders() {
    ProviderBackend.getProviders("admin")
      .then((res) => {
        this.setState({
          providers: res.filter(provider => provider.category === "Payment"),
        });
      });
  }

  getProductObj() {
    if (this.props.product !== undefined) {
      return this.props.product;
    } else {
      return this.state.product;
    }
  }

  getCurrencySymbol(product) {
    if (product?.currency === "USD") {
      return "$";
    } else if (product?.currency === "CNY") {
      return "￥";
    } else {
      return "(Unknown currency)";
    }
  }

  getCurrencyText(product) {
    if (product?.currency === "USD") {
      return i18next.t("product:USD");
    } else if (product?.currency === "CNY") {
      return i18next.t("product:CNY");
    } else {
      return "(Unknown currency)";
    }
  }

  getProviders(product) {
    if (this.state.providers.length === 0 || product.providers.length === 0) {
      return [];
    }

    let providerMap = {};
    this.state.providers.forEach(provider => {
      providerMap[provider.name] = provider;
    })

    return product.providers.map(providerName => providerMap[providerName]);
  }

  getPayUrl(product, provider) {
    if (product === null || provider === null) {
      return "";
    }

    return `https://${provider.type}`;
    // if (provider.type === "WeChat") {
    //   return `${endpoint}?client_id=${provider.clientId}&redirect_uri=${redirectUri}&scope=${scope}&response_type=code&state=${state}`;
    // } else if (provider.type === "GitHub") {
    //   return `${endpoint}?client_id=${provider.clientId}&redirect_uri=${redirectUri}&scope=${scope}&response_type=code&state=${state}`;
    // }
  }

  buyProduct(product, provider) {
    this.setState({
      isPlacingOrder: true,
    });

    ProductBackend.buyProduct(this.state.product.owner, this.state.productName, provider.name)
      .then((res) => {
        if (res.msg === "") {
          const payUrl = res.data;
          Setting.goToLink(payUrl);
        } else {
          Setting.showMessage("error", res.msg);

          this.setState({
            isPlacingOrder: false,
          });
        }
      })
      .catch(error => {
        Setting.showMessage("error", `Failed to connect to server: ${error}`);
      });
  }

  getPayButton(provider) {
    let text = provider.type;
    if (provider.type === "Alipay") {
      text = i18next.t("product:Alipay");
    } else if (provider.type === "WeChat Pay") {
      text = i18next.t("product:WeChat Pay");
    } else if (provider.type === "Paypal") {
      text = i18next.t("product:Paypal");
    }

    return (
      <Button style={{height: "50px", borderWidth: "2px"}} shape="round" icon={
        <img style={{marginRight: "10px"}} width={36} height={36} src={Provider.getProviderLogo(provider)} alt={provider.displayName} />
      } size={"large"} >
        {
          text
        }
      </Button>
    )
  }

  renderProviderButton(provider, product) {
    return (
      <span key={provider.name} style={{width: "200px", marginRight: "20px", marginBottom: "10px"}}>
        <span style={{width: "200px", cursor: "pointer"}} onClick={() => this.buyProduct(product, provider)}>
          {
            this.getPayButton(provider)
          }
        </span>
      </span>
    )
  }

  renderPay(product) {
    if (product === undefined || product === null) {
      return null;
    }

    if (product.state !== "Published") {
      return i18next.t("product:This product is currently not in sale.");
    }
    if (product.providers.length === 0) {
      return i18next.t("product:There is no payment channel for this product.");
    }

    const providers = this.getProviders(product);
    return providers.map(provider => {
      return this.renderProviderButton(provider, product);
    })
  }

  render() {
    const product = this.getProductObj();

    if (product === null) {
      return null;
    }

    return (
      <div>
        <Spin spinning={this.state.isPlacingOrder} size="large" tip={i18next.t("product:Placing order...")} style={{paddingTop: "10%"}} >
          <Descriptions title={i18next.t("product:Buy Product")} bordered>
            <Descriptions.Item label={i18next.t("general:Name")} span={3}>
            <span style={{fontSize: 28}}>
              {product?.displayName}
            </span>
            </Descriptions.Item>
            <Descriptions.Item label={i18next.t("product:Detail")}><span style={{fontSize: 16}}>{product?.detail}</span></Descriptions.Item>
            <Descriptions.Item label={i18next.t("product:Tag")}><span style={{fontSize: 16}}>{product?.tag}</span></Descriptions.Item>
            <Descriptions.Item label={i18next.t("product:SKU")}><span style={{fontSize: 16}}>{product?.name}</span></Descriptions.Item>
            <Descriptions.Item label={i18next.t("product:Image")} span={3}>
              <img src={product?.image} alt={product?.image} height={90} style={{marginBottom: '20px'}}/>
            </Descriptions.Item>
            <Descriptions.Item label={i18next.t("product:Price")}>
            <span style={{fontSize: 28, color: "red", fontWeight: "bold"}}>
              {`${this.getCurrencySymbol(product)}${product?.price} (${this.getCurrencyText(product)})`}
            </span>
            </Descriptions.Item>
            <Descriptions.Item label={i18next.t("product:Quantity")}><span style={{fontSize: 16}}>{product?.quantity}</span></Descriptions.Item>
            <Descriptions.Item label={i18next.t("product:Sold")}><span style={{fontSize: 16}}>{product?.sold}</span></Descriptions.Item>
            <Descriptions.Item label={i18next.t("product:Pay")} span={3}>
              {
                this.renderPay(product)
              }
            </Descriptions.Item>
          </Descriptions>
        </Spin>
      </div>
    )
  }
}

export default ProductBuyPage;