import assert from "node:assert/strict";
import { existsSync, readFileSync } from "node:fs";
import path from "node:path";
import test from "node:test";
import ts from "typescript";

const actionPath = path.join(process.cwd(), "convex", "pageSpeedAction.ts");
const actionSource = existsSync(actionPath) ? readFileSync(actionPath, "utf8") : "";

const actionSourceFile = ts.createSourceFile(
  "pageSpeedAction.ts",
  actionSource,
  ts.ScriptTarget.ES2022,
  true,
  ts.ScriptKind.TS,
);

function getExportedConstNames(file: ts.SourceFile) {
  const names = new Set<string>();

  const visit = (node: ts.Node) => {
    if (ts.isVariableStatement(node)) {
      const isExported = node.modifiers?.some(
        (mod) => mod.kind === ts.SyntaxKind.ExportKeyword,
      );
      if (!isExported) {
        ts.forEachChild(node, visit);
        return;
      }

      const isConst = node.declarationList.flags & ts.NodeFlags.Const;
      if (!isConst) {
        ts.forEachChild(node, visit);
        return;
      }

      for (const declaration of node.declarationList.declarations) {
        if (ts.isIdentifier(declaration.name)) {
          names.add(declaration.name.text);
        }
      }
    }

    ts.forEachChild(node, visit);
  };

  ts.forEachChild(file, visit);
  return names;
}

function hasPattern(source: string, pattern: RegExp) {
  return pattern.test(source);
}

test("pageSpeedAction module exists and runs in Node runtime", () => {
  assert.equal(existsSync(actionPath), true, "pageSpeedAction.ts should exist");
  assert.equal(
    hasPattern(actionSource, /^"use node";/m),
    true,
    "pageSpeedAction.ts should use Node runtime",
  );
});

test("pageSpeedAction exports processPageSpeedAudit as internalAction with runId validator", () => {
  const exports = getExportedConstNames(actionSourceFile);
  assert.equal(
    exports.has("processPageSpeedAudit"),
    true,
    "processPageSpeedAudit should be exported",
  );

  assert.equal(
    hasPattern(
      actionSource,
      /processPageSpeedAudit\s*=\s*internalAction\(\s*{\s*args:\s*{[\s\S]*runId:\s*v\.id\(\s*["']agentRuns["']\s*\)/,
    ),
    true,
    "processPageSpeedAudit should be an internalAction with runId validator",
  );
});

test("pageSpeedAction starts and finishes run mutations", () => {
  assert.equal(
    hasPattern(
      actionSource,
      /internal\.pageSpeed\.startPageSpeedAuditRun/,
    ),
    true,
    "Action should call internal.pageSpeed.startPageSpeedAuditRun",
  );

  assert.equal(
    hasPattern(
      actionSource,
      /internal\.pageSpeed\.finishPageSpeedAuditRun/,
    ),
    true,
    "Action should call internal.pageSpeed.finishPageSpeedAuditRun",
  );
});

test("pageSpeedAction has action-level guard to fail whole run on unexpected errors", () => {
    assert.equal(
      hasPattern(
        actionSource,
        /try\s*{[\s\S]*?await ctx\.runMutation\(internal\.pageSpeed\.startPageSpeedAuditRun,\s*{[\s\S]*?}\);\s*[\s\S]*?for\s*\(\s*(?:const|let)\s+strategy\s+of\s+STRATEGIES[\s\S]*?\}\s*catch \(error\)\s*{[\s\S]*classifyPageSpeedFailure\(error,\s*apiKeyRaw\)[\s\S]*?internal\.pageSpeed\.finishPageSpeedAuditRun[\s\S]*status:\s*["']failed["']/,
      ),
      true,
      "Action should wrap run lifecycle in an outer try/catch that finalizes the run as failed.",
    );
});

test("pageSpeedAction enforces raw payload size guard before storage", () => {
  assert.equal(
    hasPattern(actionSource, /MAX_RAW_PAGESPEED_BYTES/),
    true,
    "Action should declare MAX_RAW_PAGESPEED_BYTES constant.",
  );

  assert.equal(
    hasPattern(
      actionSource,
      /new TextEncoder\(\)\.encode\(rawJson\)\.byteLength/,
    ),
    true,
    "Action should calculate raw JSON byte length before attempting to store.",
  );

  assert.equal(
    hasPattern(
      actionSource,
      /rawJsonBytes\s*>\s*MAX_RAW_PAGESPEED_BYTES[\s\S]*?errorType:\s*["']api_error["'][\s\S]*?errorSummary:\s*RAW_PAGESPEED_BYTES_SUMMARY/,
    ),
    true,
    "Oversized raw payloads should be rejected as api_error with the required German summary.",
  );

  assert.equal(
    hasPattern(
      actionSource,
      /new Blob\(\[rawJson\][\s\S]*type:\s*["']application\/json["']/,
    ),
    true,
    "Normal raw payloads should still be stored as application/json blobs.",
  );

  assert.equal(
    hasPattern(
      actionSource,
      /if\s*\(\s*rawJsonBytes\s*>\s*MAX_RAW_PAGESPEED_BYTES[\s\S]*?}\s*[\s\S]*?continue;[\s\S]*?await ctx\.storage\.store\(/,
    ),
    true,
    "Raw payload storage must be skipped for oversized payloads.",
  );
});

test("pageSpeedAction runs both strategies and catches per-strategy errors", () => {
  assert.equal(
    hasPattern(
      actionSource,
      /["']mobile["'][\s\S]*["']desktop["']/,
    ),
    true,
    "Action should include both page speed strategies: mobile and desktop",
  );

  assert.equal(
    hasPattern(
      actionSource,
      /for\s*\(\s*(?:const|let)\s+strategy\s+of[\s\S]*?\)\s*{[\s\S]*?try[\s\S]*?catch\s*\([^)]*\)[\s\S]*?}/,
    ),
    true,
    "Action should catch errors inside per-strategy loop",
  );
});

test("pageSpeedAction stores and persists results and writes events", () => {
  assert.equal(
    hasPattern(
      actionSource,
      /ctx\.storage\.store\([\s\S]*new Blob\(\[\s*rawJson\s*[\s\S]*type:\s*["']application\/json["']/,
    ),
    true,
    "Raw PageSpeed payload should be stored via ctx.storage.store with application/json blob",
  );

  assert.equal(
    hasPattern(
      actionSource,
      /internal\.pageSpeed\.persistPageSpeedResult[\s\S]*status:\s*["']succeeded["']/,
    ),
    true,
    "Action should persist succeeded PageSpeed results",
  );

  assert.equal(
    hasPattern(
      actionSource,
      /internal\.pageSpeed\.persistPageSpeedResult[\s\S]*status:\s*["']failed["']/,
    ),
    true,
    "Action should persist failed PageSpeed results",
  );

  assert.equal(
    /api\.runs\.appendEvent,\s*{\s*[\s\S]*runId:\s*args\.runId,\s*[\s\S]*level:\s*["']info["']/.test(
      actionSource,
    ),
    true,
    "Action should append info events for successful strategy results",
  );

  assert.equal(
    /level:\s*["']warning["']/.test(actionSource) ||
    /level:\s*["']error["']/.test(actionSource),
    true,
    "Action should append warning/error events for failed strategy results",
  );
});

test("pageSpeedAction strips non-persisted normalized fields before Convex mutation", () => {
  assert.equal(
    hasPattern(actionSource, /toPersistedPageSpeedNormalizedResult/),
    true,
    "Action should map normalized PageSpeed output into the Convex validator shape.",
  );

  assert.equal(
    hasPattern(
      actionSource,
      /normalized:\s*toPersistedPageSpeedNormalizedResult\(normalized\)/,
    ),
    true,
    "Action should persist only the normalized subset accepted by convex/pageSpeed.ts.",
  );

  assert.equal(
    hasPattern(
      actionSource,
      /normalized,\s*[\r\n]/,
    ),
    false,
    "Action should not pass the full normalized object with strategy/sourceUrl/finalUrl/analysisTimestamp.",
  );
});

test("pageSpeedAction does not expose API key in event messages/details", () => {
  assert.equal(
    hasPattern(
      actionSource,
      /api\.runs\.appendEvent[\s\S]{0,500}PAGESPEED_API_KEY/,
    ),
    false,
    "Action events should not include raw PAGESPEED_API_KEY",
  );
});

test("pageSpeedAction imports PageSpeed helpers from lib/pagespeed-insights", () => {
  const hasLibImport =
    actionSource.includes("fetchPageSpeedResult") &&
    actionSource.includes("normalizePageSpeedResult") &&
    actionSource.includes("classifyPageSpeedError") &&
    actionSource.includes('from "../lib/pagespeed-insights"');

  assert.equal(hasLibImport, true, "Action should import required PageSpeed helper functions");
});

test("pageSpeedAction exposes configurable PageSpeed timeout via env var", () => {
  assert.equal(
    hasPattern(
      actionSource,
      /PAGESPEED_TIMEOUT_MS/
    ),
    true,
    "PageSpeed timeout should be configurable with PAGESPEED_TIMEOUT_MS.",
  );

  assert.equal(
    hasPattern(actionSource, /DEFAULT_PAGESPEED_TIMEOUT_MS\s*=\s*60_000/),
    true,
    "PageSpeed timeout default should be 60_000ms.",
  );

  assert.equal(
    hasPattern(actionSource, /MIN_PAGESPEED_TIMEOUT_MS\s*=\s*10_000/),
    true,
    "PageSpeed timeout min clamp should be 10_000ms.",
  );

  assert.equal(
    hasPattern(actionSource, /MAX_PAGESPEED_TIMEOUT_MS\s*=\s*120_000/),
    true,
    "PageSpeed timeout max clamp should be 120_000ms.",
  );
});

test("pageSpeedAction parses and clamps timeout values before use", () => {
  assert.equal(
    hasPattern(
      actionSource,
      /function parsePageSpeedTimeoutMs\(\s*raw:\s*string \| undefined\)/,
    ),
    true,
    "Action should parse PAGESPEED_TIMEOUT_MS via a dedicated helper.",
  );

  assert.equal(
    hasPattern(actionSource, /Number\.parseInt\(raw,\s*10\)/),
    true,
    "Action should parse env timeout values as decimal integers.",
  );

  assert.equal(
    hasPattern(actionSource, /Number\.isFinite\(/),
    true,
    "Invalid timeout values should be handled via Number.isFinite validation.",
  );

  assert.equal(
    hasPattern(
      actionSource,
      /Math\.max\(\s*parsed,\s*MIN_PAGESPEED_TIMEOUT_MS\s*\)/,
    ),
    true,
    "Timeout below min should be clamped.",
  );

  assert.equal(
    hasPattern(
      actionSource,
      /Math\.min\(\s*[\s\S]*MAX_PAGESPEED_TIMEOUT_MS\s*,\s*\)/,
    ),
    true,
    "Timeout above max should be clamped.",
  );
});

test("pageSpeedAction passes resolved timeout to PageSpeed fetch calls", () => {
  assert.equal(
    hasPattern(
      actionSource,
      /const timeoutMs = resolvePageSpeedTimeoutMs\(\)/,
    ),
    true,
    "Action should resolve timeout once from helper and pass it to fetch calls.",
  );

  assert.equal(
    hasPattern(
      actionSource,
      /fetchPageSpeedResult\([\s\S]{0,250}timeoutMs,/
    ),
    true,
    "Action should pass resolved timeout to fetchPageSpeedResult.",
  );

  assert.equal(
    hasPattern(
      actionSource,
      /const timeoutMs\s*=\s*10_000/,
    ),
    false,
    "Timeout should not be hardcoded to 10_000ms in processPageSpeedAudit.",
  );
});