import {
  AutoBeDatabase,
  AutoBeEventSource,
  AutoBeInterfaceHistory,
  AutoBeOpenApi,
  AutoBeProgressEventBase,
  AutoBeRealizeTransformerFunction,
  AutoBeRealizeTransformerPlan,
  AutoBeRealizeWriteEvent,
} from "@autobe/interface";
import { AutoBeOpenApiTypeChecker } from "@autobe/utils";
import { IPointer, Singleton } from "tstl";
import typia, { ILlmApplication, ILlmController, IValidation } from "typia";
import { v7 } from "uuid";

import { AutoBeContext } from "../../context/AutoBeContext";
import { executeCachedBatch } from "../../utils/executeCachedBatch";
import { forceRetry } from "../../utils/forceRetry";
import { AutoBePreliminaryController } from "../common/AutoBePreliminaryController";
import { transformRealizeTransformerWriteHistory } from "./histories/transformRealizeTransformerWriteHistory";
import { AutoBeRealizeTransformerProgrammer } from "./programmers/AutoBeRealizeTransformerProgrammer";
import { IAutoBeRealizeTransformerWriteApplication } from "./structures/IAutoBeRealizeTransformerWriteApplication";

export async function orchestrateRealizeTransformerWrite(
  ctx: AutoBeContext,
  props: {
    plans: AutoBeRealizeTransformerPlan[];
    progress: AutoBeProgressEventBase;
  },
): Promise<AutoBeRealizeTransformerFunction[]> {
  const history: AutoBeInterfaceHistory | null = ctx.state().interface;
  if (history === null)
    throw new Error("Cannot realize transformer write without interface.");

  const document: AutoBeOpenApi.IDocument = history.document;
  const getNeighbors = (
    plan: AutoBeRealizeTransformerPlan,
  ): AutoBeRealizeTransformerPlan[] => {
    const visited: Set<string> = new Set();
    AutoBeOpenApiTypeChecker.visit({
      components: document.components,
      schema: { $ref: `#/components/schemas/${plan.dtoTypeName}` },
      closure: (next) => {
        if (AutoBeOpenApiTypeChecker.isReference(next)) {
          const key: string = next.$ref.split("/").pop()!;
          visited.add(key);
        }
      },
    });
    return props.plans.filter(
      (p) => p.dtoTypeName !== plan.dtoTypeName && visited.has(p.dtoTypeName),
    );
  };

  props.progress.total += props.plans.length;
  return await executeCachedBatch(
    ctx,
    props.plans.map((x) => {
      const counter = new Singleton(() => ++props.progress.completed);
      return (promptCacheKey: string) =>
        forceRetry(() =>
          process(ctx, {
            progress: props.progress,
            counter,
            neighbors: getNeighbors(x),
            plan: x,
            promptCacheKey,
          }),
        );
    }),
  );
}

async function process(
  ctx: AutoBeContext,
  props: {
    plan: AutoBeRealizeTransformerPlan;
    neighbors: AutoBeRealizeTransformerPlan[];
    promptCacheKey: string;
    progress: AutoBeProgressEventBase;
    counter: Singleton<number>;
  },
): Promise<AutoBeRealizeTransformerFunction> {
  const models: AutoBeDatabase.IModel[] = ctx
    .state()
    .database!.result.data.files.map((f) => f.models)
    .flat();
  const document: AutoBeOpenApi.IDocument = ctx.state().interface!.document;
  const dtoTypeName: string = props.plan.dtoTypeName;
  const preliminary: AutoBePreliminaryController<
    "databaseSchemas" | "complete"
  > = new AutoBePreliminaryController({
    dispatch: (e) => ctx.dispatch(e),
    state: ctx.state(),
    source: SOURCE,
    application:
      typia.json.application<IAutoBeRealizeTransformerWriteApplication>(),
    kinds: ["databaseSchemas", "complete"],
    local: {
      databaseSchemas: models.filter(
        (m) => m.name === props.plan.databaseSchemaName,
      ),
    },
  });
  const event: AutoBeRealizeWriteEvent = await preliminary.orchestrate(
    ctx,
    async (out) => {
      const pointer: IPointer<IAutoBeRealizeTransformerWriteApplication.IWrite | null> =
        {
          value: null,
        };
      const result: AutoBeContext.IResult = await ctx.conversate({
        source: "realizeWrite",
        controller: createController({
          application: ctx.state().database!.result.data,
          document,
          plan: props.plan,
          neighbors: props.neighbors,
          build: (next) => {
            pointer.value = next;
          },
          preliminary,
        }),
        enforceFunctionCall: true,
        promptCacheKey: props.promptCacheKey,
        ...(await transformRealizeTransformerWriteHistory(ctx, {
          plan: props.plan,
          neighbors: props.neighbors,
          preliminary,
        })),
      });
      if (pointer.value === null) return out(result)(null);

      const content: string =
        await AutoBeRealizeTransformerProgrammer.replaceImportStatements(ctx, {
          dtoTypeName,
          schemas: document.components.schemas,
          code: pointer.value.revise.final ?? pointer.value.draft,
        });
      const model: AutoBeDatabase.IModel | undefined = models.find(
        (m) => m.name === props.plan.databaseSchemaName,
      );
      const schema: AutoBeOpenApi.IJsonSchemaDescriptive.IObject = document
        .components.schemas[
        dtoTypeName
      ] as AutoBeOpenApi.IJsonSchemaDescriptive.IObject;
      const template: string | undefined = model
        ? AutoBeRealizeTransformerProgrammer.writeTemplate({
            plan: props.plan,
            schema,
            schemas: document.components.schemas,
            neighbors: props.neighbors,
            relations:
              AutoBeRealizeTransformerProgrammer.getRelationMappingTable({
                application: ctx.state().database!.result.data,
                model,
              }),
            model,
          })
        : undefined;
      const functor: AutoBeRealizeTransformerFunction = {
        type: "transformer",
        plan: props.plan,
        neighbors: AutoBeRealizeTransformerProgrammer.getNeighbors(content),
        location: `src/transformers/${AutoBeRealizeTransformerProgrammer.getName(
          dtoTypeName,
        )}.ts`,
        content,
        template,
      };
      return out(result)({
        id: v7(),
        type: "realizeWrite",
        function: functor,
        acquisition: preliminary.getAcquisition(),
        metric: result.metric,
        tokenUsage: result.tokenUsage,
        completed: props.counter.get(),
        total: props.progress.total,
        step: ctx.state().analyze?.step ?? 0,
        created_at: new Date().toISOString(),
      } satisfies AutoBeRealizeWriteEvent);
    },
  );
  ctx.dispatch(event);
  return event.function as AutoBeRealizeTransformerFunction;
}

function createController(props: {
  application: AutoBeDatabase.IApplication;
  document: AutoBeOpenApi.IDocument;
  plan: AutoBeRealizeTransformerPlan;
  neighbors: AutoBeRealizeTransformerPlan[];
  build: (next: IAutoBeRealizeTransformerWriteApplication.IWrite) => void;
  preliminary: AutoBePreliminaryController<"databaseSchemas" | "complete">;
}): ILlmController {
  const validate: Validator = (input) => {
    const result: IValidation<IAutoBeRealizeTransformerWriteApplication.IProps> =
      typia.validate<IAutoBeRealizeTransformerWriteApplication.IProps>(input);
    if (result.success === false) return result;
    else if (result.data.request.type !== "write")
      return props.preliminary.validate({
        thinking: result.data.thinking,
        request: result.data.request,
      });

    const errors: IValidation.IError[] =
      AutoBeRealizeTransformerProgrammer.validate({
        application: props.application,
        document: props.document,
        plan: props.plan,
        neighbors: props.neighbors,
        transformMappings: result.data.request.transformMappings,
        selectMappings: result.data.request.selectMappings,
        draft: result.data.request.draft,
        revise: result.data.request.revise,
      });
    return errors.length
      ? {
          success: false,
          errors,
          data: result.data,
        }
      : result;
  };

  const application: ILlmApplication = props.preliminary.fixApplication(
    typia.llm.application<IAutoBeRealizeTransformerWriteApplication>({
      validate: {
        process: validate,
      },
    }),
  );
  AutoBeRealizeTransformerProgrammer.fixApplication({
    definition: application,
    application: props.application,
    document: props.document,
    plan: props.plan,
  });

  return {
    protocol: "class",
    name: SOURCE,
    application,
    execute: {
      process: (next) => {
        if (next.request.type === "write") props.build(next.request);
      },
    } satisfies IAutoBeRealizeTransformerWriteApplication,
  };
}

type Validator = (
  input: unknown,
) => IValidation<IAutoBeRealizeTransformerWriteApplication.IProps>;

const SOURCE = "realizeWrite" satisfies AutoBeEventSource;