import { resolveAgentWorkspaceDir, resolveDefaultAgentId } from "../../agents/agent-scope.js";
import { listChannelPluginCatalogEntries } from "../../channels/plugins/catalog.js";
import { getChannelPlugin, normalizeChannelId } from "../../channels/plugins/index.js";
import type { ChannelId } from "../../channels/plugins/types.js";
import { writeConfigFile, type ClawdbotConfig } from "../../config/config.js";
import { DEFAULT_ACCOUNT_ID, normalizeAccountId } from "../../routing/session-key.js";
import { defaultRuntime, type RuntimeEnv } from "../../runtime.js";
import { createClackPrompter } from "../../wizard/clack-prompter.js";
import { setupChannels } from "../onboard-channels.js";
import type { ChannelChoice } from "../onboard-types.js";
import {
  ensureOnboardingPluginInstalled,
  reloadOnboardingPluginRegistry,
} from "../onboarding/plugin-install.js";
import { applyAccountName, applyChannelAccountConfig } from "./add-mutators.js";
import { channelLabel, requireValidConfig, shouldUseWizard } from "./shared.js";

export type ChannelsAddOptions = {
  channel?: string;
  account?: string;
  name?: string;
  token?: string;
  tokenFile?: string;
  botToken?: string;
  appToken?: string;
  signalNumber?: string;
  cliPath?: string;
  dbPath?: string;
  service?: "imessage" | "sms" | "auto";
  region?: string;
  authDir?: string;
  httpUrl?: string;
  httpHost?: string;
  httpPort?: string;
  webhookPath?: string;
  webhookUrl?: string;
  audienceType?: string;
  audience?: string;
  useEnv?: boolean;
  homeserver?: string;
  userId?: string;
  accessToken?: string;
  password?: string;
  deviceName?: string;
  initialSyncLimit?: number | string;
  ship?: string;
  url?: string;
  code?: string;
  groupChannels?: string;
  dmAllowlist?: string;
  autoDiscoverChannels?: boolean;
};

function parseList(value: string | undefined): string[] | undefined {
  if (!value?.trim()) return undefined;
  const parsed = value
    .split(/[\n,;]+/g)
    .map((entry) => entry.trim())
    .filter(Boolean);
  return parsed.length > 0 ? parsed : undefined;
}

function resolveCatalogChannelEntry(raw: string, cfg: ClawdbotConfig | null) {
  const trimmed = raw.trim().toLowerCase();
  if (!trimmed) return undefined;
  const workspaceDir = cfg ? resolveAgentWorkspaceDir(cfg, resolveDefaultAgentId(cfg)) : undefined;
  return listChannelPluginCatalogEntries({ workspaceDir }).find((entry) => {
    if (entry.id.toLowerCase() === trimmed) return true;
    return (entry.meta.aliases ?? []).some((alias) => alias.trim().toLowerCase() === trimmed);
  });
}

export async function channelsAddCommand(
  opts: ChannelsAddOptions,
  runtime: RuntimeEnv = defaultRuntime,
  params?: { hasFlags?: boolean },
) {
  const cfg = await requireValidConfig(runtime);
  if (!cfg) return;
  let nextConfig = cfg;

  const useWizard = shouldUseWizard(params);
  if (useWizard) {
    const prompter = createClackPrompter();
    let selection: ChannelChoice[] = [];
    const accountIds: Partial<Record<ChannelChoice, string>> = {};
    await prompter.intro("Channel setup");
    let nextConfig = await setupChannels(cfg, runtime, prompter, {
      allowDisable: false,
      allowSignalInstall: true,
      promptAccountIds: true,
      onSelection: (value) => {
        selection = value;
      },
      onAccountId: (channel, accountId) => {
        accountIds[channel] = accountId;
      },
    });
    if (selection.length === 0) {
      await prompter.outro("No channels selected.");
      return;
    }

    const wantsNames = await prompter.confirm({
      message: "Add display names for these accounts? (optional)",
      initialValue: false,
    });
    if (wantsNames) {
      for (const channel of selection) {
        const accountId = accountIds[channel] ?? DEFAULT_ACCOUNT_ID;
        const plugin = getChannelPlugin(channel as ChannelId);
        const account = plugin?.config.resolveAccount(nextConfig, accountId) as
          | { name?: string }
          | undefined;
        const snapshot = plugin?.config.describeAccount?.(account, nextConfig);
        const existingName = snapshot?.name ?? account?.name;
        const name = await prompter.text({
          message: `${channel} account name (${accountId})`,
          initialValue: existingName,
        });
        if (name?.trim()) {
          nextConfig = applyAccountName({
            cfg: nextConfig,
            channel,
            accountId,
            name,
          });
        }
      }
    }

    await writeConfigFile(nextConfig);
    await prompter.outro("Channels updated.");
    return;
  }

  const rawChannel = String(opts.channel ?? "");
  let channel = normalizeChannelId(rawChannel);
  let catalogEntry = channel ? undefined : resolveCatalogChannelEntry(rawChannel, nextConfig);

  if (!channel && catalogEntry) {
    const prompter = createClackPrompter();
    const workspaceDir = resolveAgentWorkspaceDir(nextConfig, resolveDefaultAgentId(nextConfig));
    const result = await ensureOnboardingPluginInstalled({
      cfg: nextConfig,
      entry: catalogEntry,
      prompter,
      runtime,
      workspaceDir,
    });
    nextConfig = result.cfg;
    if (!result.installed) return;
    reloadOnboardingPluginRegistry({ cfg: nextConfig, runtime, workspaceDir });
    channel = normalizeChannelId(catalogEntry.id) ?? (catalogEntry.id as ChannelId);
  }

  if (!channel) {
    const hint = catalogEntry
      ? `Plugin ${catalogEntry.meta.label} could not be loaded after install.`
      : `Unknown channel: ${String(opts.channel ?? "")}`;
    runtime.error(hint);
    runtime.exit(1);
    return;
  }

  const plugin = getChannelPlugin(channel);
  if (!plugin?.setup?.applyAccountConfig) {
    runtime.error(`Channel ${channel} does not support add.`);
    runtime.exit(1);
    return;
  }
  const accountId =
    plugin.setup.resolveAccountId?.({ cfg: nextConfig, accountId: opts.account }) ??
    normalizeAccountId(opts.account);
  const useEnv = opts.useEnv === true;
  const initialSyncLimit =
    typeof opts.initialSyncLimit === "number"
      ? opts.initialSyncLimit
      : typeof opts.initialSyncLimit === "string" && opts.initialSyncLimit.trim()
        ? Number.parseInt(opts.initialSyncLimit, 10)
        : undefined;
  const groupChannels = parseList(opts.groupChannels);
  const dmAllowlist = parseList(opts.dmAllowlist);

  const validationError = plugin.setup.validateInput?.({
    cfg: nextConfig,
    accountId,
    input: {
      name: opts.name,
      token: opts.token,
      tokenFile: opts.tokenFile,
      botToken: opts.botToken,
      appToken: opts.appToken,
      signalNumber: opts.signalNumber,
      cliPath: opts.cliPath,
      dbPath: opts.dbPath,
      service: opts.service,
      region: opts.region,
      authDir: opts.authDir,
      httpUrl: opts.httpUrl,
      httpHost: opts.httpHost,
      httpPort: opts.httpPort,
      webhookPath: opts.webhookPath,
      webhookUrl: opts.webhookUrl,
      audienceType: opts.audienceType,
      audience: opts.audience,
      homeserver: opts.homeserver,
      userId: opts.userId,
      accessToken: opts.accessToken,
      password: opts.password,
      deviceName: opts.deviceName,
      initialSyncLimit,
      useEnv,
      ship: opts.ship,
      url: opts.url,
      code: opts.code,
      groupChannels,
      dmAllowlist,
      autoDiscoverChannels: opts.autoDiscoverChannels,
    },
  });
  if (validationError) {
    runtime.error(validationError);
    runtime.exit(1);
    return;
  }

  nextConfig = applyChannelAccountConfig({
    cfg: nextConfig,
    channel,
    accountId,
    name: opts.name,
    token: opts.token,
    tokenFile: opts.tokenFile,
    botToken: opts.botToken,
    appToken: opts.appToken,
    signalNumber: opts.signalNumber,
    cliPath: opts.cliPath,
    dbPath: opts.dbPath,
    service: opts.service,
    region: opts.region,
    authDir: opts.authDir,
    httpUrl: opts.httpUrl,
    httpHost: opts.httpHost,
    httpPort: opts.httpPort,
    webhookPath: opts.webhookPath,
    webhookUrl: opts.webhookUrl,
    audienceType: opts.audienceType,
    audience: opts.audience,
    homeserver: opts.homeserver,
    userId: opts.userId,
    accessToken: opts.accessToken,
    password: opts.password,
    deviceName: opts.deviceName,
    initialSyncLimit,
    useEnv,
    ship: opts.ship,
    url: opts.url,
    code: opts.code,
    groupChannels,
    dmAllowlist,
    autoDiscoverChannels: opts.autoDiscoverChannels,
  });

  await writeConfigFile(nextConfig);
  runtime.log(`Added ${channelLabel(channel)} account "${accountId}".`);
}