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/*
 * Copyright 2017-2023 original authors
 *
 * 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
 *
 * https://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.
 */
package io.micronaut.azure.function.http;

import com.microsoft.azure.functions.ExecutionContext;
import com.microsoft.azure.functions.HttpRequestMessage;
import com.microsoft.azure.functions.TraceContext;
import io.micronaut.context.annotation.Replaces;
import io.micronaut.core.annotation.Internal;
import io.micronaut.core.convert.ArgumentConversionContext;
import io.micronaut.core.convert.ConversionService;
import io.micronaut.core.type.Argument;
import io.micronaut.http.HttpRequest;
import io.micronaut.http.bind.DefaultRequestBinderRegistry;
import io.micronaut.http.bind.binders.DefaultBodyAnnotationBinder;
import io.micronaut.http.bind.binders.RequestArgumentBinder;
import io.micronaut.http.bind.binders.TypedRequestArgumentBinder;
import io.micronaut.http.codec.MediaTypeCodecRegistry;
import io.micronaut.servlet.http.ServletBinderRegistry;
import jakarta.inject.Singleton;

import java.util.List;
import java.util.Optional;
import java.util.logging.Logger;

@Singleton
@Internal
@Replaces(DefaultRequestBinderRegistry.class)
class AzureBinderRegistry extends ServletBinderRegistry {

    private static final Argument EXECUTION_CONTEXT_ARGUMENT = Argument.of(ExecutionContext.class);
    private static final Argument TRACE_CONTEXT_ARGUMENT = Argument.of(TraceContext.class);
    private static final Argument LOGGER_ARGUMENT = Argument.of(Logger.class);
    private static final Argument REQUEST_MESSAGE_ARGUMENT = Argument.of(HttpRequestMessage.class);

    AzureBinderRegistry(
        MediaTypeCodecRegistry mediaTypeCodecRegistry,
        ConversionService conversionService,
        List binders,
        DefaultBodyAnnotationBinder defaultBodyAnnotationBinder
    ) {
        super(mediaTypeCodecRegistry, conversionService, binders, defaultBodyAnnotationBinder);
        this.byType.put(HttpRequestMessage.class, new TypedRequestArgumentBinder() {
            @Override
            public BindingResult bind(
                ArgumentConversionContext context, HttpRequest source) {
                if (source instanceof AzureFunctionHttpRequest req) {
                    return () -> Optional.of(req.getNativeRequest());
                } else {
                    return BindingResult.EMPTY;
                }
            }

            @Override
            public Argument argumentType() {
                return REQUEST_MESSAGE_ARGUMENT;
            }
        });
        this.byType.put(ExecutionContext.class, new TypedRequestArgumentBinder() {
            @Override
            public BindingResult bind(
                ArgumentConversionContext context, HttpRequest source) {
                if (source instanceof AzureFunctionHttpRequest req) {
                    return () -> Optional.of(req.getExecutionContext());
                } else {
                    return BindingResult.EMPTY;
                }
            }

            @Override
            public Argument argumentType() {
                return EXECUTION_CONTEXT_ARGUMENT;
            }
        });
        this.byType.put(Logger.class, new TypedRequestArgumentBinder() {
            @Override
            public BindingResult bind(
                ArgumentConversionContext context, HttpRequest source) {
                if (source instanceof AzureFunctionHttpRequest req && req.getExecutionContext() != null && req.getExecutionContext().getLogger() != null) {
                    return () -> Optional.of(req.getExecutionContext().getLogger());
                }
                return BindingResult.EMPTY;
            }

            @Override
            public Argument argumentType() {
                return LOGGER_ARGUMENT;
            }
        });
        this.byType.put(TraceContext.class, new TypedRequestArgumentBinder() {
            @Override
            public BindingResult bind(
                ArgumentConversionContext context, HttpRequest source) {
                if (source instanceof AzureFunctionHttpRequest req) {
                    return () -> Optional.ofNullable(req.getExecutionContext().getTraceContext());
                } else {
                    return BindingResult.EMPTY;
                }
            }

            @Override
            public Argument argumentType() {
                return TRACE_CONTEXT_ARGUMENT;
            }
        });
    }
}