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package ru.omickron.rest;

import com.google.common.collect.ImmutableMap;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.core.Context;
import lombok.AllArgsConstructor;
import lombok.NonNull;
import lombok.SneakyThrows;
import org.apache.commons.io.IOUtils;
import org.asciidoctor.Asciidoctor;
import org.asciidoctor.OptionsBuilder;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import ru.omickron.beans.CurrentUser;
import ru.omickron.exception.BadRequestException;
import ru.omickron.service.FeedbackService;
import ru.omickron.system.permissions.Anonymous;
import ru.omickron.util.Const;

import static java.util.Objects.isNull;

@RestController
@RequestMapping(Const.REST + "/docs")
@Anonymous
@AllArgsConstructor
public class DocsFacade {
    @NonNull
    private final Asciidoctor asciidoctor;
    @NonNull
    private final CurrentUser currentUser;
    @NonNull
    private final FeedbackService feedbackService;

    @PostMapping("/request")
    public void requestDocs( @RequestParam("id") String id ) {
        String message = String.format(
                "Привет, разработчики!\n\nБыло бы здорово увидеть документацию по разделу %s.\n\nСпасибо!", id );
        feedbackService.createForUser( currentUser.getUser(), message );
    }

    @GetMapping(value = "/content/**")
    @SneakyThrows
    public Map<String, String> getDocs( @Context HttpServletRequest request ) {
        String name = request.getRequestURI().replaceFirst( Const.REST + "/docs/content", "/docs" );
        InputStream inputStream = getClass().getResourceAsStream( name + ".adoc" );
        if (isNull( inputStream )) {
            throw new BadRequestException( "No document found for '%s'", name );
        }
        String adocContent = IOUtils.toString( inputStream, StandardCharsets.UTF_8 );
        return ImmutableMap.of( "html", asciidoctor.convert( adocContent, OptionsBuilder.options() ) );
    }
}