#!/usr/bin/env node
import fs from "node:fs";
import path from "node:path";
import { loadChannelConfigSurfaceModule } from "./load-channel-config-surface.ts";

const GENERATED_BY = "scripts/generate-bundled-channel-config-metadata.ts";
const DEFAULT_OUTPUT_PATH = "src/config/bundled-channel-config-metadata.generated.ts";

type BundledPluginSource = {
  dirName: string;
  pluginDir: string;
  manifestPath: string;
  manifest: {
    id: string;
    channels?: unknown;
    name?: string;
    description?: string;
  } & Record<string, unknown>;
  packageJson?: Record<string, unknown>;
};

const { collectBundledPluginSources } = (await import(
  new URL("./lib/bundled-plugin-source-utils.mjs", import.meta.url).href
)) as {
  collectBundledPluginSources: (params?: {
    repoRoot?: string;
    requirePackageJson?: boolean;
  }) => BundledPluginSource[];
};

const { formatGeneratedModule } = (await import(
  new URL("./lib/format-generated-module.mjs", import.meta.url).href
)) as {
  formatGeneratedModule: (
    source: string,
    options: {
      repoRoot: string;
      outputPath: string;
      errorLabel: string;
    },
  ) => string;
};

const { writeGeneratedOutput } = (await import(
  new URL("./lib/generated-output-utils.mjs", import.meta.url).href
)) as {
  writeGeneratedOutput: (params: {
    repoRoot: string;
    outputPath: string;
    next: string;
    check?: boolean;
  }) => {
    changed: boolean;
    wrote: boolean;
    outputPath: string;
  };
};

type BundledChannelConfigMetadata = {
  pluginId: string;
  channelId: string;
  label?: string;
  description?: string;
  schema: Record<string, unknown>;
  uiHints?: Record<string, unknown>;
};

function resolveChannelConfigSchemaModulePath(rootDir: string): string | null {
  const candidates = [
    path.join(rootDir, "src", "config-schema.ts"),
    path.join(rootDir, "src", "config-schema.js"),
    path.join(rootDir, "src", "config-schema.mts"),
    path.join(rootDir, "src", "config-schema.mjs"),
  ];
  for (const candidate of candidates) {
    if (fs.existsSync(candidate)) {
      return candidate;
    }
  }
  return null;
}

function resolvePackageChannelMeta(source: BundledPluginSource) {
  const openclawMeta =
    source.packageJson &&
    typeof source.packageJson === "object" &&
    !Array.isArray(source.packageJson) &&
    "openclaw" in source.packageJson
      ? (source.packageJson.openclaw as Record<string, unknown> | undefined)
      : undefined;
  const channelMeta =
    openclawMeta &&
    typeof openclawMeta.channel === "object" &&
    openclawMeta.channel &&
    !Array.isArray(openclawMeta.channel)
      ? (openclawMeta.channel as Record<string, unknown>)
      : undefined;
  return channelMeta;
}

function resolveRootLabel(source: BundledPluginSource, channelId: string): string | undefined {
  const channelMeta = resolvePackageChannelMeta(source);
  if (channelMeta?.id === channelId && typeof channelMeta.label === "string") {
    return channelMeta.label.trim();
  }
  if (typeof source.manifest?.name === "string" && source.manifest.name.trim()) {
    return source.manifest.name.trim();
  }
  return undefined;
}

function resolveRootDescription(
  source: BundledPluginSource,
  channelId: string,
): string | undefined {
  const channelMeta = resolvePackageChannelMeta(source);
  if (channelMeta?.id === channelId && typeof channelMeta.blurb === "string") {
    return channelMeta.blurb.trim();
  }
  if (typeof source.manifest?.description === "string" && source.manifest.description.trim()) {
    return source.manifest.description.trim();
  }
  return undefined;
}

function formatTypeScriptModule(source: string, outputPath: string, repoRoot: string): string {
  return formatGeneratedModule(source, {
    repoRoot,
    outputPath,
    errorLabel: "bundled channel config metadata",
  });
}

export async function collectBundledChannelConfigMetadata(params?: { repoRoot?: string }) {
  const repoRoot = path.resolve(params?.repoRoot ?? process.cwd());
  const sources = collectBundledPluginSources({ repoRoot, requirePackageJson: true });
  const entries: BundledChannelConfigMetadata[] = [];

  for (const source of sources) {
    const channelIds = Array.isArray(source.manifest?.channels)
      ? source.manifest.channels.filter(
          (entry: unknown): entry is string => typeof entry === "string" && entry.trim().length > 0,
        )
      : [];
    if (channelIds.length === 0) {
      continue;
    }
    const modulePath = resolveChannelConfigSchemaModulePath(source.pluginDir);
    if (!modulePath) {
      continue;
    }
    const surface = await loadChannelConfigSurfaceModule(modulePath, { repoRoot });
    if (!surface?.schema) {
      continue;
    }
    for (const channelId of channelIds) {
      const label = resolveRootLabel(source, channelId);
      const description = resolveRootDescription(source, channelId);
      entries.push({
        pluginId: String(source.manifest.id),
        channelId,
        ...(label ? { label } : {}),
        ...(description ? { description } : {}),
        schema: surface.schema,
        ...(Object.keys(surface.uiHints ?? {}).length > 0 ? { uiHints: surface.uiHints } : {}),
      });
    }
  }

  return entries.toSorted((left, right) => left.channelId.localeCompare(right.channelId));
}

export async function writeBundledChannelConfigMetadataModule(params?: {
  repoRoot?: string;
  outputPath?: string;
  check?: boolean;
}) {
  const repoRoot = path.resolve(params?.repoRoot ?? process.cwd());
  const outputPath = params?.outputPath ?? DEFAULT_OUTPUT_PATH;
  const entries = await collectBundledChannelConfigMetadata({ repoRoot });
  const next = formatTypeScriptModule(
    `// Auto-generated by ${GENERATED_BY}. Do not edit directly.

export const GENERATED_BUNDLED_CHANNEL_CONFIG_METADATA = ${JSON.stringify(entries, null, 2)} as const;
`,
    outputPath,
    repoRoot,
  );
  return writeGeneratedOutput({
    repoRoot,
    outputPath,
    next,
    check: params?.check,
  });
}

if (import.meta.url === new URL(process.argv[1] ?? "", "file://").href) {
  const check = process.argv.includes("--check");
  const result = await writeBundledChannelConfigMetadataModule({ check });
  if (!result.changed) {
    process.exitCode = 0;
  } else if (check) {
    console.error(
      `[bundled-channel-config-metadata] stale generated output at ${path.relative(process.cwd(), result.outputPath)}`,
    );
    process.exitCode = 1;
  } else {
    console.log(
      `[bundled-channel-config-metadata] wrote ${path.relative(process.cwd(), result.outputPath)}`,
    );
  }
}