/*
 * Copyright (C) 2008-2023, Juick
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.juick.config;

import java.net.MalformedURLException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Paths;
import java.util.List;
import java.util.concurrent.TimeUnit;

import javax.inject.Inject;

import com.juick.service.UserService;
import com.juick.www.VisitorArgumentResolver;
import com.mitchellbosecke.pebble.extension.FormatterExtension;
import io.pebbletemplates.pebble.PebbleEngine;
import io.pebbletemplates.pebble.loader.ClasspathLoader;
import io.pebbletemplates.pebble.loader.Loader;
import io.pebbletemplates.spring.extension.SpringExtension;
import io.pebbletemplates.spring.servlet.PebbleViewResolver;
import jakarta.annotation.PostConstruct;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.convert.converter.Converter;
import org.springframework.format.FormatterRegistry;
import org.springframework.http.CacheControl;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.resource.VersionResourceResolver;

@Configuration
@EnableCaching
@EnableAsync(proxyTargetClass = true)
@EnableScheduling
public class WebConfig implements WebMvcConfigurer {
    @Value("${storage_path:#{systemProperties['java.io.tmpdir']}}")
    private String baseDir;
    @Inject
    private List<? extends Converter<?, ?>> converters;
    @Inject
    private UserService userService;

    private boolean testsAreRunning = false;
    private boolean devToolsArePresent = false;
    @PostConstruct
    public void initConfiguration() {
        try {
            Class.forName("org.springframework.boot.devtools.livereload.Connection");
            devToolsArePresent = true;
        } catch (ClassNotFoundException e) {
            // release mode
        }
        for (StackTraceElement s : Thread.currentThread().getStackTrace()) {
            if (s.getClassName().contains("org.springframework.boot.test.context.SpringBootContextLoader")) {
                testsAreRunning = true;
            }
        }
    }

    @Override
    public void addFormatters(FormatterRegistry registry) {
        for (Converter<?, ?> converter : converters) {
            registry.addConverter(converter);
        }
    }
    @Bean
    HandlerMethodArgumentResolver visitorArgumentResolver() {
        return new VisitorArgumentResolver(userService);
    }
    @Override
    public void addArgumentResolvers(List<HandlerMethodArgumentResolver> resolvers) {
        resolvers.add(visitorArgumentResolver());
    }

    @Bean
    Loader<?> templateLoader() {
        return new ClasspathLoader();
    }

    @Bean
    SpringExtension springExtension() {
        return new SpringExtension(null);
    }

    @Bean
    PebbleEngine pebbleEngine() {

        return new PebbleEngine.Builder()
                .loader(this.templateLoader())
                .cacheActive(!devToolsArePresent)
                .extension(springExtension())
                .extension(new FormatterExtension())
                .newLineTrimming(false)
                .strictVariables(true)
                .build();
    }
    @Bean
    ViewResolver viewResolver() {
        PebbleViewResolver viewResolver = new PebbleViewResolver(pebbleEngine());
        viewResolver.setPrefix("templates");
        viewResolver.setSuffix(".html");
        viewResolver.setCharacterEncoding(StandardCharsets.UTF_8.name());
        viewResolver.setExposeRequestAttributes(true);
        return viewResolver;
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        try {
            if (devToolsArePresent && !testsAreRunning) {
                registry
                        .addResourceHandler("/**", "/i/a/**")
                        .addResourceLocations("classpath:/static/", Paths.get(baseDir, "/i/a/").toUri().toURL().toString());
            } else {
                registry
                        .addResourceHandler("/**", "/i/a/**")
                        .addResourceLocations("classpath:/static/", Paths.get(baseDir, "/i/a/").toUri().toURL().toString())
                        .setCacheControl(CacheControl.maxAge(365, TimeUnit.DAYS))
                        .resourceChain(false)
                        .addResolver(new VersionResourceResolver().addContentVersionStrategy("/**", "/i/a/**"));
            }
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
    }
}