import path from "node:path";
import { collectBundledPluginSources } from "./lib/bundled-plugin-source-utils.mjs";
import { reportGeneratedOutputCli, writeGeneratedOutput } from "./lib/generated-output-utils.mjs";

const GENERATED_BY = "scripts/generate-bundled-provider-auth-env-vars.mjs";
const DEFAULT_OUTPUT_PATH = "src/plugins/bundled-provider-auth-env-vars.generated.ts";

function normalizeProviderAuthEnvVars(providerAuthEnvVars) {
  if (
    !providerAuthEnvVars ||
    typeof providerAuthEnvVars !== "object" ||
    Array.isArray(providerAuthEnvVars)
  ) {
    return [];
  }

  return Object.entries(providerAuthEnvVars)
    .map(([providerId, envVars]) => {
      const normalizedProviderId = providerId.trim();
      const normalizedEnvVars = Array.isArray(envVars)
        ? envVars.map((value) => String(value).trim()).filter(Boolean)
        : [];
      if (!normalizedProviderId || normalizedEnvVars.length === 0) {
        return null;
      }
      return [normalizedProviderId, normalizedEnvVars];
    })
    .filter(Boolean)
    .toSorted(([left], [right]) => left.localeCompare(right));
}

export function collectBundledProviderAuthEnvVars(params = {}) {
  const repoRoot = path.resolve(params.repoRoot ?? process.cwd());
  const entries = new Map();
  for (const source of collectBundledPluginSources({ repoRoot })) {
    for (const [providerId, envVars] of normalizeProviderAuthEnvVars(
      source.manifest.providerAuthEnvVars,
    )) {
      entries.set(providerId, envVars);
    }
  }

  return Object.fromEntries(
    [...entries.entries()].toSorted(([left], [right]) => left.localeCompare(right)),
  );
}

export function renderBundledProviderAuthEnvVarModule(entries) {
  const renderedEntries = Object.entries(entries)
    .map(([providerId, envVars]) => {
      const renderedKey = /^[$A-Z_a-z][\w$]*$/u.test(providerId)
        ? providerId
        : JSON.stringify(providerId);
      const renderedEnvVars = envVars.map((value) => JSON.stringify(value)).join(", ");
      return `  ${renderedKey}: [${renderedEnvVars}],`;
    })
    .join("\n");
  return `// Auto-generated by ${GENERATED_BY}. Do not edit directly.

export const BUNDLED_PROVIDER_AUTH_ENV_VAR_CANDIDATES = {
${renderedEntries}
} as const satisfies Record<string, readonly string[]>;
`;
}

export function writeBundledProviderAuthEnvVarModule(params = {}) {
  const repoRoot = path.resolve(params.repoRoot ?? process.cwd());
  const next = renderBundledProviderAuthEnvVarModule(
    collectBundledProviderAuthEnvVars({ repoRoot }),
  );
  return writeGeneratedOutput({
    repoRoot,
    outputPath: params.outputPath ?? DEFAULT_OUTPUT_PATH,
    next,
    check: params.check,
  });
}

reportGeneratedOutputCli({
  importMetaUrl: import.meta.url,
  label: "bundled-provider-auth-env-vars",
  run: ({ check }) => writeBundledProviderAuthEnvVarModule({ check }),
});