import { BrowserObservationError } from "./browserObservationError.js";
import { EvidenceFileError } from "./evidenceErrors.js";
import type { AnalysisError } from "./analysisErrorBase.js";
import {
  AnalysisAccessDeniedError,
  AnalysisArtifactChangedError,
  AnalysisInputError,
  type AnalysisInputIssue,
  AnalysisOutputError,
  AnalysisCapabilityUnavailableError,
  AnalysisResourceConstraintError,
  resourceConstraintRecovery,
  AnalysisCancelledError,
  AnalysisTimeoutError,
} from "./analysisErrorCore.js";
import { redactExplicitText } from "./explicitSensitiveValues.js";
import type { JsonValue } from "./jsonValue.js";
import { ProviderAdapterError } from "./providerAdapterError.js";
import { ProviderCleanupError } from "./providerCleanupError.js";
import {
  fileSnapshotPartialObservationSchema,
  type FileSnapshotPartialObservation,
} from "./fileSnapshotObservation.js";

/** Exclude whole identity values; redacted text is no longer a path or digest. */
const excludeSnapshotIdentity = (
  value: unknown,
  text: (value: string) => string,
): FileSnapshotPartialObservation | undefined => {
  if (
    value === null ||
    typeof value !== "object" ||
    !("kind" in value) ||
    (value.kind !== "file-snapshot-hash" && value.kind !== "file-snapshot-read")
  )
    return undefined;
  const parsed = fileSnapshotPartialObservationSchema.safeParse(value);
  if (!parsed.success) return undefined;
  const snapshot = parsed.data;
  const exclude = (identity: string | null): string | null =>
    identity !== null && text(identity) !== identity ? null : identity;
  const path = exclude(snapshot.path);
  if (snapshot.kind === "file-snapshot-hash") {
    const sha256 = exclude(snapshot.sha256);
    return { ...snapshot, path, sha256 };
  }
  const admitted_sha256 = exclude(snapshot.admitted_sha256);
  return { ...snapshot, path, admitted_sha256 };
};

const redactSensitivePointer = (
  pointer: string,
  text: (value: string) => string,
): string => {
  let parent = "";
  for (const segment of pointer.split("/").slice(1)) {
    const decoded = segment.replaceAll("~1", "/").replaceAll("~0", "~");
    const child = `${parent}/${segment}`;
    if (text(decoded) !== decoded || text(child) !== child) return parent;
    parent = child;
  }
  return parent;
};

/** Exclude explicit literals from common acquisition/decoder failures, preserving typed diagnostics. */
export const redactExplicitFailure = (
  error: AnalysisError,
  values: readonly string[],
): AnalysisError => {
  if (values.length === 0) return error;
  return redactSensitiveFailure(error, (value) =>
    redactExplicitText(value, values),
  );
};

/** Apply the producer's parsed sensitivity rules without exporting resolved secrets. */
export const redactSensitiveFailure = (
  error: AnalysisError,
  text: (value: string) => string,
): AnalysisError => {
  const snapshot = excludeSnapshotIdentity(error.partialObservation, text);
  if (snapshot !== undefined) error.partialObservation = snapshot;
  const redacted = redactFailure(error, text);
  // Other observation owners already apply their format-aware exclusions.
  if (redacted !== error && error.partialObservation !== undefined)
    redacted.retainPartialObservation(error.partialObservation);
  return redacted === error ? error : mirrorCleanup(error, redacted, text);
};

const redactFailure = (
  error: AnalysisError,
  text: (value: string) => string,
): AnalysisError => {
  const path = (
    parts: readonly (string | number)[],
    ordinaryNames: boolean,
  ): (string | number)[] => {
    const retained: (string | number)[] = [];
    for (const part of parts) {
      if (typeof part !== "string") {
        retained.push(part);
      } else if (!ordinaryNames && part.startsWith("/")) {
        const pointer = redactSensitivePointer(part, text);
        retained.push(pointer);
        if (pointer !== part) break;
      } else {
        if (text(part) !== part) break;
        retained.push(part);
      }
    }
    return retained;
  };
  const diagnostics = (
    value: Readonly<Record<string, JsonValue>>,
  ): Record<string, JsonValue> =>
    Object.fromEntries(
      Object.entries(value)
        .filter(([key]) => text(key) === key)
        .map(([key, item]) => [key, visit(item)]),
    );
  const visit = (value: JsonValue): JsonValue => {
    const snapshot = excludeSnapshotIdentity(value, text);
    if (snapshot !== undefined) return snapshot;
    if (typeof value === "string") return text(value);
    if (Array.isArray(value)) return value.map(visit);
    if (typeof value === "object" && value !== null) return diagnostics(value);
    return value;
  };
  const issueProjection = (issue: AnalysisInputIssue): AnalysisInputIssue => ({
    ...issue,
    // Unknown arguments are literal names, not producer JSON pointers.
    path: path(issue.path, issue.reason === "unknown_argument"),
    ...(issue.message === undefined ? {} : { message: text(issue.message) }),
    ...(issue.expected === undefined
      ? {}
      : { expected: visit(issue.expected) }),
    ...(issue.observed === undefined
      ? {}
      : { observed: visit(issue.observed) }),
  });
  const guidance = error.continuingCallerGuidance;
  const context = {
    cause: error,
    ...(error.limit === undefined ? {} : { limit: error.limit }),
    ...(guidance === undefined
      ? {}
      : {
          continuingCallerGuidance: {
            ...(guidance.userMessage === undefined
              ? {}
              : { userMessage: text(guidance.userMessage) }),
            ...(guidance.remediationAction === undefined
              ? {}
              : { remediationAction: text(guidance.remediationAction) }),
          },
        }),
    ...(error.cleanupPrimary === undefined
      ? {}
      : {
          cleanupPrimary: redactSensitiveFailure(error.cleanupPrimary, text),
        }),
    ...(error.diagnostics === undefined
      ? {}
      : { diagnostics: diagnostics(error.diagnostics) }),
    ...(error.invocationDiagnostics === undefined
      ? {}
      : { invocationDiagnostics: diagnostics(error.invocationDiagnostics) }),
    ...(error.capturedOutput === undefined
      ? {}
      : {
          capturedOutput: {
            ...error.capturedOutput,
            stdout: text(error.capturedOutput.stdout),
            stderr: text(error.capturedOutput.stderr),
          },
        }),
    ...(error.cleanup === undefined
      ? {}
      : {
          cleanup: {
            reason: text(error.cleanup.reason),
            resources: error.cleanup.resources.map(text),
          },
        }),
  };
  if (error instanceof BrowserObservationError)
    return new BrowserObservationError(error.operation, error.reason, {
      ...context,
      ...(error.detail === undefined ? {} : { detail: text(error.detail) }),
      ...(error.remediationAction === undefined
        ? {}
        : { remediationAction: text(error.remediationAction) }),
    });
  if (error instanceof EvidenceFileError) {
    const identity = (value: string | undefined): string | undefined =>
      value !== undefined && text(value) !== value ? undefined : value;
    const retainedPath = identity(error.path);
    const publishedPath = identity(error.published?.path);
    return new EvidenceFileError(error.operation, error.reason, {
      ...context,
      ...(error.systemCode === undefined ||
      text(error.systemCode) !== error.systemCode
        ? {}
        : { systemCode: error.systemCode }),
      ...(retainedPath === undefined ? {} : { path: retainedPath }),
      ...(error.userMessage === undefined
        ? {}
        : { userMessage: text(error.userMessage) }),
      ...(error.published === undefined
        ? {}
        : {
            published: {
              bytes: error.published.bytes,
              ...(publishedPath === undefined ? {} : { path: publishedPath }),
            },
          }),
      ...(error.contentIssues === undefined
        ? {}
        : { contentIssues: error.contentIssues.map(issueProjection) }),
    });
  }
  if (error instanceof AnalysisCancelledError)
    return new AnalysisCancelledError(error.operation, {
      ...context,
      cause: error.cause,
    });
  if (error instanceof AnalysisTimeoutError)
    return new AnalysisTimeoutError(error.operation, error.timeoutMs, {
      ...context,
      ...(error.userMessage === undefined
        ? {}
        : { userMessage: text(error.userMessage) }),
      ...(error.remediationAction === undefined
        ? {}
        : { remediationAction: text(error.remediationAction) }),
    });
  if (error instanceof AnalysisAccessDeniedError)
    return new AnalysisAccessDeniedError(
      error.operation,
      text(error.path),
      error.systemCode,
      context,
    );
  if (error instanceof AnalysisArtifactChangedError)
    return new AnalysisArtifactChangedError(
      error.operation,
      text(error.path),
      text(error.reason),
      context,
    );
  if (error instanceof AnalysisInputError)
    return new AnalysisInputError(
      error.operation,
      {
        ...context,
        ...(error.userMessage === undefined
          ? {}
          : { userMessage: text(error.userMessage) }),
        ...(error.remediationAction === undefined
          ? {}
          : { remediationAction: text(error.remediationAction) }),
        conformsToInputContract: error.conformsToInputContract,
      },
      error.issues.map(issueProjection),
    );
  if (error instanceof AnalysisOutputError)
    return new AnalysisOutputError(
      error.operation,
      text(error.reason),
      context,
    );
  if (error instanceof AnalysisCapabilityUnavailableError)
    return new AnalysisCapabilityUnavailableError(
      error.providerId,
      error.operation,
      text(error.reason),
      {
        ...context,
        ...(error.userMessage === undefined
          ? {}
          : { userMessage: text(error.userMessage) }),
        ...(error.remediationAction === undefined
          ? {}
          : { remediationAction: text(error.remediationAction) }),
        ...(error.fallbackRemediationAction === undefined
          ? {}
          : {
              fallbackRemediationAction: text(error.fallbackRemediationAction),
            }),
        ...(error.siblingOperations === undefined
          ? {}
          : { siblingOperations: error.siblingOperations }),
        ...(error.siblingReasons === undefined
          ? {}
          : {
              siblingReasons: Object.fromEntries(
                Object.entries(error.siblingReasons).map(([op, msg]) => [
                  op,
                  text(msg),
                ]),
              ),
            }),
        ...(error.retryable ? { retryable: true } : {}),
      },
    );
  if (error instanceof AnalysisResourceConstraintError)
    return new AnalysisResourceConstraintError(
      error.operation,
      error.resource,
      text(error.reason),
      error.reportedLimits === null ? null : diagnostics(error.reportedLimits),
      { ...context, ...resourceConstraintRecovery(error, text) },
    );
  if (error instanceof ProviderCleanupError)
    return new ProviderCleanupError(
      error.providerId,
      error.cleanupResources.map(text),
      diagnostics(error.diagnostics ?? {}),
      {
        ...context,
        operation: error.operation,
      },
    );
  if (error instanceof ProviderAdapterError)
    return new ProviderAdapterError(error.providerId, error.operation, {
      ...context,
      ...(error.userMessage === undefined
        ? {}
        : { userMessage: text(error.userMessage) }),
      ...(error.remediationAction === undefined
        ? {}
        : { remediationAction: text(error.remediationAction) }),
    });
  return error;
};

const mirrorCleanup = <Value extends AnalysisError>(
  source: AnalysisError,
  redacted: Value,
  redact: (value: string) => string,
): Value =>
  redacted.bindCleanupDependencies([source], {
    get cleanupResources(): readonly string[] {
      return source.cleanupResources.map(redact);
    },
  });