import {
  IAgenticaTokenUsageJson,
  IAgenticaVendor,
  MicroAgentica,
} from "@agentica/core";
import {
  AutoBeAssistantMessageHistory,
  AutoBeHistory,
  AutoBePhase,
  AutoBeProcessAggregateCollection,
  AutoBeUserConversateContent,
  AutoBeUserMessageHistory,
  IAutoBeAgent,
  IAutoBeCompilerListener,
  IAutoBeGetFilesOptions,
} from "@autobe/interface";
import { AutoBeProcessAggregateFactory } from "@autobe/utils";
import { Semaphore, Singleton } from "tstl";
import { v7 } from "uuid";

import { AutoBeAgentBase } from "./AutoBeAgentBase";
import { AutoBeConfigConstant } from "./constants/AutoBeConfigConstant";
import { AutoBeContext } from "./context/AutoBeContext";
import { AutoBeState } from "./context/AutoBeState";
import { AutoBeTokenUsage } from "./context/AutoBeTokenUsage";
import { describe } from "./describe/describe";
import { createAgenticaHistory } from "./factory/createAgenticaHistory";
import { createAutoBeContext } from "./factory/createAutoBeContext";
import { createAutoBeState } from "./factory/createAutoBeState";
import { getAutoBeGenerated } from "./factory/getAutoBeGenerated";
import { mergeSystemMessages } from "./factory/mergeSystemMessages";
// import { supportFunctionCallFallback } from "./factory/supportFunctionCallFallback";
import { supportMistral } from "./factory/supportMistral";
import { createAutoBeFacadeController } from "./orchestrate/facade/createAutoBeFacadeController";
import { transformFacadeStateMessage } from "./orchestrate/facade/structures/transformFacadeStateMessage";
import { IAutoBeProps } from "./structures/IAutoBeProps";
import { randomBackoffStrategy } from "./utils/backoffRetry";

/**
 * Main agent class that orchestrates the entire vibe coding pipeline through
 * conversation-driven development.
 *
 * The AutoBeAgent serves as the central coordinator for the waterfall-based
 * development process with spiral model iterative improvements. It manages the
 * five specialized agents (Analyze, Database, Interface, Test, Realize) that
 * transform user conversations into complete working applications through a
 * sophisticated AST-based compilation infrastructure.
 *
 * The agent operates through natural language conversation, supporting
 * multimodal input including text, images, files, and audio. It maintains
 * conversation history, tracks development progress through real-time events,
 * and provides access to all generated artifacts including requirements
 * documentation, database schemas, API specifications, test suites, and
 * implementation code.
 *
 * The vibe coding approach eliminates traditional development barriers by
 * enabling users to express requirements naturally while the agent handles all
 * technical implementation details through validated AST transformations and
 * continuous quality assurance feedback loops.
 *
 * @author Samchon
 */
export class AutoBeAgent extends AutoBeAgentBase implements IAutoBeAgent {
  /** @internal */
  private readonly props_: IAutoBeProps;

  /** @internal */
  private readonly agentica_: MicroAgentica;

  /** @internal */
  private readonly histories_: AutoBeHistory[];

  /** @internal */
  private readonly context_: AutoBeContext;

  /** @internal */
  private readonly state_: AutoBeState;

  /** @internal */
  private readonly usage_: AutoBeTokenUsage;

  /** @internal */
  private readonly aggregates_: AutoBeProcessAggregateCollection;

  /* -----------------------------------------------------------
    CONSTRUCTOR
  ----------------------------------------------------------- */
  /**
   * Initializes a new AutoBeAgent instance with the specified configuration.
   *
   * Creates and configures the agent with AI vendor settings, behavioral
   * context (locale/timezone), and compilation infrastructure. The agent can
   * optionally resume from previous conversation histories to continue
   * development sessions or build upon existing work.
   *
   * The constructor sets up the internal MicroAgentica engine, initializes the
   * development state from provided histories, and establishes the event
   * dispatch system for real-time progress notifications. The agent becomes
   * ready for conversation-driven development immediately after construction.
   *
   * @param props Configuration properties including AI vendor settings,
   *   behavioral context, compilation tools, and optional conversation
   *   histories for session continuation
   */
  public constructor(props: IAutoBeProps) {
    // INITIALIZE MEMBERS
    super();
    this.props_ = props;
    this.histories_ = props.histories?.slice() ?? [];
    this.state_ = createAutoBeState(this.histories_);
    this.usage_ =
      props.tokenUsage instanceof AutoBeTokenUsage
        ? props.tokenUsage
        : new AutoBeTokenUsage(props.tokenUsage);

    // CONSTRUCT AGENTICA
    const vendor: IAgenticaVendor = {
      ...props.vendor,
      semaphore: new Semaphore(props.vendor.semaphore ?? 16),
    };
    const compilerListener: IAutoBeCompilerListener = {
      realize: {
        test: {
          onOperation: async () => {},
          onReset: async () => {},
        },
      },
    };
    const compiler = new Singleton(async () =>
      props.compiler(compilerListener),
    );

    // CONTEXT
    this.aggregates_ = !!props.histories?.length
      ? AutoBeProcessAggregateFactory.reduce(
          props.histories
            .filter(
              (h) =>
                h.type === "analyze" ||
                h.type === "database" ||
                h.type === "interface" ||
                h.type === "test" ||
                h.type === "realize",
            )
            .map((h) => h.aggregates),
        )
      : AutoBeProcessAggregateFactory.createCollection();
    this.context_ = createAutoBeContext({
      vendor: props.vendor,
      aggregates: this.aggregates_,
      config: {
        backoffStrategy: randomBackoffStrategy,
        ...props.config,
      },
      compiler: () => compiler.get(),
      compilerListener,
      state: () => this.state_,
      files: (options) => this.getFiles(options),
      histories: () => this.histories_,
      usage: () => this.usage_,
      dispatch: (event) => this.dispatch(event),
    });

    // AGENTICA
    this.agentica_ = new MicroAgentica({
      vendor,
      config: {
        backoffStrategy: randomBackoffStrategy,
        ...(props.config ?? {}),
        executor: {
          describe: false,
        },
        systemPrompt: {
          execute: () => transformFacadeStateMessage(this.state_),
        },
        retry: props.config?.retry ?? AutoBeConfigConstant.VALIDATION_RETRY,
        // stream: false,
      },
      controllers: [
        createAutoBeFacadeController({
          context: this.getContext(),
        }),
      ],
    });
    supportMistral(this.agentica_, props.vendor);
    // supportFunctionCallFallback(this.agentica_, props.vendor);
    mergeSystemMessages(this.agentica_, props.vendor);
    this.agentica_.getHistories().push(
      ...this.histories_
        .map((history) =>
          createAgenticaHistory({
            operations: this.agentica_.getOperations(),
            history,
          }),
        )
        .filter((h) => h !== null),
    );

    // TRACE FACADE TOKEN USAGE
    let previous: IAgenticaTokenUsageJson.IComponent = this.agentica_
      .getTokenUsage()
      .toJSON().aggregate;
    const increment = () => {
      const current: IAgenticaTokenUsageJson.IComponent = this.agentica_
        .getTokenUsage()
        .toJSON().aggregate;
      this.usage_.facade.increment({
        total: current.total - previous.total,
        input: {
          total: current.input.total - previous.input.total,
          cached: current.input.cached - previous.input.cached,
        },
        output: {
          total: current.output.total - previous.output.total,
          reasoning: current.output.reasoning - previous.output.reasoning,
          accepted_prediction:
            current.output.accepted_prediction -
            previous.output.accepted_prediction,
          rejected_prediction:
            current.output.rejected_prediction -
            previous.output.rejected_prediction,
        },
      });
      previous = current;
    };

    // SHIFT EVENTS
    this.agentica_.on("assistantMessage", async (message) => {
      const start = new Date();
      const history: AutoBeAssistantMessageHistory = {
        id: v7(),
        type: "assistantMessage",
        text: await message.join(),
        created_at: start.toISOString(),
        completed_at: new Date().toISOString(),
      };
      increment();
      this.histories_.push(history);
      void this.dispatch({
        type: "assistantMessage",
        id: history.id,
        text: history.text,
        created_at: history.created_at,
      }).catch(() => {});
    });
    this.agentica_.on("call", async () => {
      increment();
    });
    this.agentica_.on("request", (e) => {
      if (e.body.parallel_tool_calls !== undefined)
        delete e.body.parallel_tool_calls;
      void this.dispatch({
        ...e,
        type: "vendorRequest",
        source: "facade",
        retry: 0,
      }).catch(() => {});
    });
    this.agentica_.on("response", (e) => {
      void this.dispatch({
        ...e,
        type: "vendorResponse",
        source: "facade",
        retry: 0,
      }).catch(() => {});
    });
  }

  /** @internal */
  public clone(): AutoBeAgent {
    return new AutoBeAgent({
      ...this.props_,
      histories: this.histories_.slice(),
    });
  }

  /* -----------------------------------------------------------
    ACCESSORS
  ----------------------------------------------------------- */
  public async conversate(
    content:
      | string
      | AutoBeUserConversateContent
      | AutoBeUserConversateContent[],
  ): Promise<AutoBeHistory[]> {
    const index: number = this.histories_.length;
    const userContent: AutoBeUserConversateContent[] =
      typeof content === "string"
        ? [
            {
              type: "text",
              text: content,
            },
          ]
        : Array.isArray(content)
          ? content
          : [content];
    for (const c of userContent) {
      if (c.type === "text" && c.text.trim().length === 0) {
        throw new Error("User message cannot be empty");
      }
    }
    void this.dispatch({
      type: "userMessage",
      id: v7(),
      contents: userContent,
      created_at: new Date().toISOString(),
    }).catch(() => {});

    const userMessageHistory: AutoBeUserMessageHistory = await describe(
      this.context_,
      { content },
    );
    this.histories_.push(userMessageHistory);

    await this.agentica_.conversate(userMessageHistory.contents);
    return this.histories_.slice(index);
  }

  public getHistories(): AutoBeHistory[] {
    return this.histories_;
  }

  public getTokenUsage(): AutoBeTokenUsage {
    return this.usage_;
  }

  public async getFiles(
    options?: IAutoBeGetFilesOptions,
  ): Promise<Record<string, string>> {
    return await getAutoBeGenerated({
      compiler: await this.context_.compiler(),
      state: this.state_,
      histories: this.getHistories(),
      tokenUsage: this.getTokenUsage(),
      options,
    });
  }

  public getAggregates(
    latest: boolean = false,
  ): AutoBeProcessAggregateCollection {
    if (latest === false) return this.aggregates_;
    const state: AutoBeState = this.context_.state();
    return AutoBeProcessAggregateFactory.reduce(
      [
        state.analyze,
        state.database,
        state.interface,
        state.test,
        state.realize,
      ]
        .filter((x) => x !== null)
        .map((x) => x.aggregates),
    );
  }

  public getPhase(): AutoBePhase | null {
    if (this.state_.analyze === null) return null;
    else if (this.state_.realize?.step === this.state_.analyze.step)
      return "realize";
    else if (this.state_.test?.step === this.state_.analyze.step) return "test";
    else if (this.state_.interface?.step === this.state_.analyze.step)
      return "interface";
    else if (this.state_.database?.step === this.state_.analyze.step)
      return "database";
    return "analyze";
  }

  /** @internal */
  public getContext(): AutoBeContext {
    return this.context_;
  }
}