// Copyright 2005-2007 onetsoft.com
//
// 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

package com.onetsoft.fastjsp;

import com.onetsoft.fastjsp.request.PageData;
import com.onetsoft.fastjsp.request.multipart.DefaultMultipartDecoder;
import com.onetsoft.fastjsp.request.multipart.MultipartDecoder;
import com.onetsoft.fastjsp.util.StringUtils;
import com.onetsoft.fastjsp.util.Util;
import com.onetsoft.fastjsp.util.Constants;

import java.io.UnsupportedEncodingException;


/**
 * 自定義頁面服務(wù)應(yīng)繼承此類
 *
 * @author <a href="mailto:hgw@onetsoft.com">hgw</a>
 */
public abstract class AbstractPageService implements PageService {

    AbstractPageCycle cycle = null;

    ActionsManager actionsManager = null;
    ComponentsManager componentsManager = null;
    LayoutManager layoutManager = null;

    AbstractPage page = null;

    AbstractServicer servicer = null;

    MultipartDecoder decoder = null;

    LocaleStateManager localeStateManager = null;

    PageData data = null;

    boolean formRequest = false;

    boolean started = false;

    ValidationDelegateComboImpl delegateCombo = new ValidationDelegateComboImpl();

    protected AbstractPageService(Servicer servicer) {
        this.servicer = (AbstractServicer) servicer;
        attach();
    }


    private void attach() {
        layoutManager = servicer.module.layoutManagerFactory.getLayoutManager(servicer.pageParams);

        /*  try {
            servicer.request.setCharacterEncoding(servicer.module.charset);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }*/

        /**
         * 此設(shè)置經(jīng)測試只對表單提交有效，而url的參數(shù)(靜態(tài)參數(shù)和動態(tài)查詢參數(shù))的decoding、encoding均以module.charset為準(zhǔn)。
         * 注意：這里不強(qiáng)行設(shè)置，而留給其他顯示設(shè)置，如：filter中設(shè)置request.setCharacterEncoding("utf-8");滿足用戶需要“完全統(tǒng)一”編碼的情形！
         */
        //    Debug.debug("AbstractServicer.init() Line:88....request.getCharacterEncoding():" + request.getCharacterEncoding());
        // Debug.debug("AbstractServicer.init() Line:90....module.charset:" + module.charset);
        if (servicer.request.getCharacterEncoding() == null) {
            try {
                servicer.request.setCharacterEncoding(Constants.UTF_8);  //utf-8是最安全穩(wěn)妥的編碼
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
        }

        //Parse request type.
        // Note:When submitting a form ,the form "method" should be "post",otherwise the "contentType" from request will be null!!!
        String contentType = servicer.request.getContentType();
        if (StringUtils.METHOD_POST.equalsIgnoreCase(servicer.getRequest().getMethod()) && contentType != null &&
                (contentType.startsWith(StringUtils.CONTENTTYPE_FORM_NORMAL)
                        || contentType.startsWith(StringUtils.CONTENTTYPE_FORM_MULTIPART))) {
            formRequest = true;
        }
    }

    public void initialize() {
        cycle = createCycle(this);
        localeStateManager = servicer.module.localeStateManagerFactory.getLocaleStateManager();
        localeStateManager.init(cycle);
    }

    final void start() {
        if (started) return;
        componentsManager = layoutManager.getComponentsManager(servicer.pageParams.pageClass);
        if (!servicer.pageParams.defaultPageUsed) {
            actionsManager = layoutManager.getActionsManager(servicer.pageParams.pageClass);
        }
        try {
            decodeRequest();
        } finally {
            data = new PageDataImpl(servicer, decoder);
            servicer.stateURL.decodeAfterDataBuild(data);
            componentsManager.instanceComponents(cycle);
        }
        try {
            beginRequest();
            if (!servicer.pageParams.defaultPageUsed)
                actionsManager.execute(this);
            componentsManager.initComponentsFields(cycle);
        } finally {
            endRequest();
            started = true;
        }
    }


    /**
     * 啟動頁面服務(wù)會調(diào)用此方法
     * 可在這里執(zhí)行自定義服務(wù)過程
     */
    protected void beginRequest() {
    }

    /**
     * 用戶請求處理
     *
     * @since 3.0
     */
    protected void endRequest() {
    }

    /**
     * 停止頁面服務(wù)
     * 一般用于清除當(dāng)前請求狀態(tài)以及同步用戶狀態(tài)等
     * 注:每次頁面請求執(zhí)行完畢都必須執(zhí)行此方法
     *
     * @throws java.io.IOException
     */
    public void end() {
        localeStateManager.commitChange(cycle);
    }

    /**
     * 解析請求參數(shù)
     * 所解析的參數(shù)包括：標(biāo)準(zhǔn)的url請求參數(shù)、表單參數(shù)、上傳表單參數(shù)
     * 注：此方法執(zhí)行前已經(jīng)對靜態(tài)url作了參數(shù)解析
     *
     * @see PageParamsImpl
     * @see AbstractServicer
     */
    private void decodeRequest() {
        String contentType = servicer.request.getContentType();
        try {
            if (contentType != null && contentType.startsWith(StringUtils.CONTENTTYPE_FORM_MULTIPART)) {
                decoder = new DefaultMultipartDecoder(servicer.pageParams.parameterMap, servicer.module.getUploadConfig());
                servicer.request = decoder.decode(servicer.request);
            } else {
                ParamsHelper.decodeRequestParameterMap(servicer.request, servicer.pageParams.parameterMap, servicer.module.encoding);
            }
        } finally {
            if (decoder == null)
                decoder = Util.EMPTY_DECODER;
        }
    }


    public PageCycle getCycle() {
        return cycle;
    }


    /**
     * 創(chuàng)建page cycle
     * 所有自定義page cycle應(yīng)繼承{@link AbstractPageCycle}
     *
     * @param pageService
     * @return
     */
    protected abstract AbstractPageCycle createCycle(AbstractPageService pageService);

}