content: /*
   * Copyright 2024-2025 the original author or 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 com.alibaba.cloud.ai.studio.admin.generator.api;
  
  import java.io.IOException;
  import java.nio.charset.StandardCharsets;
  import java.util.Optional;
  
  import com.alibaba.cloud.ai.studio.admin.generator.common.R;
  import com.alibaba.cloud.ai.studio.admin.generator.exception.NotImplementedException;
  import com.alibaba.cloud.ai.studio.admin.generator.exception.SerializationException;
  import com.alibaba.cloud.ai.studio.admin.generator.model.App;
  import com.alibaba.cloud.ai.studio.admin.generator.param.DSLParam;
  import com.alibaba.cloud.ai.studio.admin.generator.saver.AppSaver;
  import com.alibaba.cloud.ai.studio.admin.generator.service.dsl.DSLAdapter;
  import com.alibaba.cloud.ai.studio.admin.generator.service.dsl.DSLDialectType;
  import io.swagger.v3.oas.annotations.Operation;
  import io.swagger.v3.oas.annotations.tags.Tag;
  
  import org.springframework.core.io.ByteArrayResource;
  import org.springframework.core.io.Resource;
  import org.springframework.http.HttpHeaders;
  import org.springframework.http.MediaType;
  import org.springframework.http.ResponseEntity;
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.PathVariable;
  import org.springframework.web.bind.annotation.PostMapping;
  import org.springframework.web.bind.annotation.RequestBody;
  import org.springframework.web.bind.annotation.RequestParam;
  import org.springframework.web.bind.annotation.RequestPart;
  import org.springframework.web.multipart.MultipartFile;
  
  @Tag(name = "DSL", description = "the DSL API")
  public interface DSLAPI {
  
  	DSLAdapter getAdapter(DSLDialectType dialect);
  
  	AppSaver getAppSaver();
  
  	@Operation(summary = "export app to dsl", tags = { "DSL" })
  	@GetMapping(value = "/export/{id}", produces = "application/json")
  	default R<String> exportDSL(@PathVariable("id") String id, @RequestParam("dialect") String dialect) {
  		App app = Optional.ofNullable(getAppSaver().get(id))
  			.orElseThrow(() -> new IllegalArgumentException("App not found: " + id));
  		DSLDialectType dialectType = DSLDialectType.fromValue(dialect)
  			.orElseThrow(() -> new NotImplementedException("Unsupported dsl dialect: " + dialect));
  		return R.success(getAdapter(dialectType).exportDSL(app));
  	}
  
  	@Operation(summary = "export app to dsl file", tags = { "DSL" })
  	@GetMapping(value = "/export-file/{id}", produces = MediaType.APPLICATION_OCTET_STREAM_VALUE)
  	default ResponseEntity<Resource> exportDSLFile(@PathVariable("id") String id,
  			@RequestParam("dialect") String dialect) {
  		App app = Optional.ofNullable(getAppSaver().get(id))
  			.orElseThrow(() -> new IllegalArgumentException("App not found: " + id));
  		DSLDialectType dialectType = DSLDialectType.fromValue(dialect)
  			.orElseThrow(() -> new NotImplementedException("Unsupported dsl dialect: " + dialect));
  		String dslContent = getAdapter(dialectType).exportDSL(app);
  		ByteArrayResource resource = new ByteArrayResource(dslContent.getBytes(StandardCharsets.UTF_8));
  		String fileName = app.getMetadata().getName() + dialectType.fileExtension();
  		return ResponseEntity.ok()
  			.header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + fileName + "\"")
  			.contentType(MediaType.APPLICATION_OCTET_STREAM)
  			.contentLength(resource.contentLength())
  			.body(resource);
  	}
  
  	@Operation(summary = "import app from dsl", tags = { "DSL" })
  	@PostMapping(value = "/import", produces = "application/json")
  	default R<App> importDSL(@RequestBody DSLParam param) {
  		DSLDialectType dialectType = DSLDialectType.fromValue(param.getDialect())
  			.orElseThrow(() -> new NotImplementedException("Unsupported dsl dialect: " + param.getDialect()));
  		App app = getAdapter(dialectType).importDSL(param.getContent());
  		app = getAppSaver().save(app);
  		return R.success(app);
  	}
  
  	@Operation(summary = "import app from dsl file ", tags = { "DSL" })
  	@PostMapping(value = "/import-file", consumes = MediaType.MULTIPART_FORM_DATA_VALUE, produces = "application/json")
  	default R<App> importDSLFile(@RequestPart("file") MultipartFile file, @RequestParam("dialect") String dialect) {
  		String content;
  		try {
  			content = new String(file.getBytes(), StandardCharsets.UTF_8);
  		}
  		catch (IOException e) {
  			throw new SerializationException("Read dsl file failed, please check if the encoding of file is UTF_8 ");
  		}
  		DSLDialectType dialectType = DSLDialectType.fromValue(dialect)
  			.orElseThrow(() -> new NotImplementedException("Unsupported dsl dialect: " + dialect));
  		App app = getAdapter(dialectType).importDSL(content);
  		app = getAppSaver().save(app);
  		return R.success(app);
  	}
  
  }
  