import type { ExecutionOptions } from "../AnalysisProvider.js";
import type { ElectronObservationPort } from "./ElectronObservationPort.js";
import type { Evidence } from "../../domain/evidence.js";
import type {
  InspectElectronPageInput,
  ListElectronTargetsInput,
} from "../../domain/javascript/electronObservation.js";
import {
  AnalysisCancelledError,
  AnalysisCapabilityUnavailableError,
  AnalysisOutputError,
} from "../../domain/analysisErrorCore.js";
import type { AnalysisError } from "../../domain/analysisErrorBase.js";
import { err, ok, type Result } from "../../domain/result.js";
import { createElectronEvidence } from "./ElectronEvidence.js";
import {
  electronPageInspectionSchema,
  electronTargetListSchema,
} from "../../domain/javascript/electronObservation.js";
import { completeProviderEvidence } from "../ProviderOperationExecution.js";

/** List local file pages exposed by the explicitly selected endpoint. */
export const listElectronTargets = async (
  provider: ElectronObservationPort | undefined,
  input: ListElectronTargetsInput,
  options: ExecutionOptions = {},
): Promise<Result<Evidence, AnalysisError>> => {
  const ready = requireProvider(provider, "list_electron_targets");
  if (!ready.ok) return ready;
  if (options.signal?.aborted)
    return err(new AnalysisCancelledError("list_electron_targets"));
  const result = await ready.value.listTargets(input, options);
  if (!result.ok) return result;
  const report = electronTargetListSchema.safeParse(result.value);
  if (!report.success)
    return err(
      new AnalysisOutputError(
        "list_electron_targets",
        "Electron provider returned a malformed target list.",
        { cause: report.error },
      ),
    );
  return completeProviderEvidence(
    ok(
      createElectronEvidence(
        "list_electron_targets",
        input,
        report.data,
        ready.value.identity(),
      ),
    ),
    "list_electron_targets",
    options,
  );
};

/** Inspect one local file page from the explicitly selected endpoint. */
export const inspectElectronPage = async (
  provider: ElectronObservationPort | undefined,
  input: InspectElectronPageInput,
  options: ExecutionOptions = {},
): Promise<Result<Evidence, AnalysisError>> => {
  const ready = requireProvider(provider, "inspect_electron_page");
  if (!ready.ok) return ready;
  if (options.signal?.aborted)
    return err(new AnalysisCancelledError("inspect_electron_page"));
  const result = await ready.value.inspectPage(input, options);
  if (!result.ok) {
    if (
      result.error.partialObservation !== undefined &&
      !("evidence_id" in result.error.partialObservation) &&
      "target" in result.error.partialObservation &&
      "dom" in result.error.partialObservation &&
      "capture_window" in result.error.partialObservation
    ) {
      const report = electronPageInspectionSchema.safeParse(
        result.error.partialObservation,
      );
      if (!report.success) {
        if (result.error instanceof AnalysisCancelledError)
          return err(
            new AnalysisOutputError(
              "inspect_electron_page",
              "Electron provider retained a malformed completed page inspection.",
              { cause: report.error },
            ),
          );
        return result;
      }
      result.error.partialObservation = createElectronEvidence(
        "inspect_electron_page",
        input,
        report.data,
        ready.value.identity(),
      );
    }
    return result;
  }
  const report = electronPageInspectionSchema.safeParse(result.value);
  if (!report.success)
    return err(
      new AnalysisOutputError(
        "inspect_electron_page",
        "Electron provider returned a malformed page inspection.",
        { cause: report.error },
      ),
    );
  return completeProviderEvidence(
    ok(
      createElectronEvidence(
        "inspect_electron_page",
        input,
        report.data,
        ready.value.identity(),
      ),
    ),
    "inspect_electron_page",
    options,
  );
};

const requireProvider = (
  provider: ElectronObservationPort | undefined,
  operation: "list_electron_targets" | "inspect_electron_page",
): Result<ElectronObservationPort, AnalysisError> =>
  provider === undefined
    ? err(
        new AnalysisCapabilityUnavailableError(
          "rea-cdp-electron",
          operation,
          "Electron observation provider is not configured",
        ),
      )
    : ok(provider);