import { CallWarning, FinishReason, ProviderMetadata } from '../types';
import { Source } from '../types/language-model';
import { LanguageModelRequestMetadata } from '../types/language-model-request-metadata';
import { LanguageModelResponseMetadata } from '../types/language-model-response-metadata';
import { LanguageModelUsage } from '../types/usage';
import { ContentPart } from './content-part';
import { GeneratedFile } from './generated-file';
import { Output } from './output';
import { InferCompleteOutput } from './output-utils';
import { ReasoningOutput } from './reasoning-output';
import { ResponseMessage } from './response-message';
import { StepResult } from './step-result';
import { DynamicToolCall, StaticToolCall, TypedToolCall } from './tool-call';
import {
  DynamicToolResult,
  StaticToolResult,
  TypedToolResult,
} from './tool-result';
import { ToolSet } from './tool-set';

/**
 * The result of a `generateText` call.
 * It contains the generated text, the tool calls that were made during the generation, and the results of the tool calls.
 */
export interface GenerateTextResult<
  TOOLS extends ToolSet,
  OUTPUT extends Output,
> {
  /**
   * The content that was generated in the last step.
   */
  readonly content: Array<ContentPart<TOOLS>>;

  /**
   * The text that was generated in the last step.
   */
  readonly text: string;

  /**
   * The full reasoning that the model has generated in the last step.
   */
  readonly reasoning: Array<ReasoningOutput>;

  /**
   * The reasoning text that the model has generated in the last step. Can be undefined if the model
   * has only generated text.
   */
  readonly reasoningText: string | undefined;

  /**
   * The files that were generated in the last step.
   * Empty array if no files were generated.
   */
  readonly files: Array<GeneratedFile>;

  /**
   * Sources that have been used as references in the last step.
   */
  readonly sources: Array<Source>;

  /**
   * The tool calls that were made in the last step.
   */
  readonly toolCalls: Array<TypedToolCall<TOOLS>>;

  /**
   * The static tool calls that were made in the last step.
   */
  readonly staticToolCalls: Array<StaticToolCall<TOOLS>>;

  /**
   * The dynamic tool calls that were made in the last step.
   */
  readonly dynamicToolCalls: Array<DynamicToolCall>;

  /**
   * The results of the tool calls from the last step.
   */
  readonly toolResults: Array<TypedToolResult<TOOLS>>;

  /**
   * The static tool results that were made in the last step.
   */
  readonly staticToolResults: Array<StaticToolResult<TOOLS>>;

  /**
   * The dynamic tool results that were made in the last step.
   */
  readonly dynamicToolResults: Array<DynamicToolResult>;

  /**
   * The unified reason why the generation finished.
   */
  readonly finishReason: FinishReason;

  /**
   * The raw reason why the generation finished (from the provider).
   */
  readonly rawFinishReason: string | undefined;

  /**
   * The token usage of the last step.
   */
  readonly usage: LanguageModelUsage;

  /**
   * The total token usage of all steps.
   * When there are multiple steps, the usage is the sum of all step usages.
   */
  readonly totalUsage: LanguageModelUsage;

  /**
   * Warnings from the model provider (e.g. unsupported settings)
   */
  readonly warnings: CallWarning[] | undefined;

  /**
   * Additional request information.
   */
  readonly request: LanguageModelRequestMetadata;

  /**
   * Additional response information.
   */
  readonly response: LanguageModelResponseMetadata & {
    /**
     * The response messages that were generated during the call. It consists of an assistant message,
     * potentially containing tool calls.
     *
     * When there are tool results, there is an additional tool message with the tool results that are available.
     * If there are tools that do not have execute functions, they are not included in the tool results and
     * need to be added separately.
     */
    messages: Array<ResponseMessage>;

    /**
     * Response body (available only for providers that use HTTP requests).
     */
    body?: unknown;
  };

  /**
   * Additional provider-specific metadata. They are passed through
   * from the provider to the AI SDK and enable provider-specific
   * results that can be fully encapsulated in the provider.
   */
  readonly providerMetadata: ProviderMetadata | undefined;

  /**
   * Details for all steps.
   * You can use this to get information about intermediate steps,
   * such as the tool calls or the response headers.
   */
  readonly steps: Array<StepResult<TOOLS>>;

  /**
   * The generated structured output. It uses the `output` specification.
   *
   * @deprecated Use `output` instead.
   */
  readonly experimental_output: InferCompleteOutput<OUTPUT>;

  /**
   * The generated structured output. It uses the `output` specification.
   *
   */
  readonly output: InferCompleteOutput<OUTPUT>;
}