import {
  resolvePayloadMediaUrls,
  sendPayloadMediaSequence,
  sendTextMediaPayload,
} from "openclaw/plugin-sdk/channel-runtime";
import type { ChannelOutboundAdapter } from "openclaw/plugin-sdk/channel-runtime";
import { resolveOutboundSendDep } from "openclaw/plugin-sdk/channel-runtime";
import type { OpenClawConfig } from "openclaw/plugin-sdk/config-runtime";
import type { OutboundIdentity } from "openclaw/plugin-sdk/infra-runtime";
import type { DiscordComponentMessageSpec } from "./components.js";
import { getThreadBindingManager, type ThreadBindingRecord } from "./monitor/thread-bindings.js";
import { normalizeDiscordOutboundTarget } from "./normalize.js";
import {
  sendDiscordComponentMessage,
  sendMessageDiscord,
  sendPollDiscord,
  sendWebhookMessageDiscord,
} from "./send.js";
import { buildDiscordInteractiveComponents } from "./shared-interactive.js";

export const DISCORD_TEXT_CHUNK_LIMIT = 2000;

function resolveDiscordOutboundTarget(params: {
  to: string;
  threadId?: string | number | null;
}): string {
  if (params.threadId == null) {
    return params.to;
  }
  const threadId = String(params.threadId).trim();
  if (!threadId) {
    return params.to;
  }
  return `channel:${threadId}`;
}

function resolveDiscordWebhookIdentity(params: {
  identity?: OutboundIdentity;
  binding: ThreadBindingRecord;
}): { username?: string; avatarUrl?: string } {
  const usernameRaw = params.identity?.name?.trim();
  const fallbackUsername = params.binding.label?.trim() || params.binding.agentId;
  const username = (usernameRaw || fallbackUsername || "").slice(0, 80) || undefined;
  const avatarUrl = params.identity?.avatarUrl?.trim() || undefined;
  return { username, avatarUrl };
}

async function maybeSendDiscordWebhookText(params: {
  cfg?: OpenClawConfig;
  text: string;
  threadId?: string | number | null;
  accountId?: string | null;
  identity?: OutboundIdentity;
  replyToId?: string | null;
}): Promise<{ messageId: string; channelId: string } | null> {
  if (params.threadId == null) {
    return null;
  }
  const threadId = String(params.threadId).trim();
  if (!threadId) {
    return null;
  }
  const manager = getThreadBindingManager(params.accountId ?? undefined);
  if (!manager) {
    return null;
  }
  const binding = manager.getByThreadId(threadId);
  if (!binding?.webhookId || !binding?.webhookToken) {
    return null;
  }
  const persona = resolveDiscordWebhookIdentity({
    identity: params.identity,
    binding,
  });
  const result = await sendWebhookMessageDiscord(params.text, {
    webhookId: binding.webhookId,
    webhookToken: binding.webhookToken,
    accountId: binding.accountId,
    threadId: binding.threadId,
    cfg: params.cfg,
    replyTo: params.replyToId ?? undefined,
    username: persona.username,
    avatarUrl: persona.avatarUrl,
  });
  return result;
}

export const discordOutbound: ChannelOutboundAdapter = {
  deliveryMode: "direct",
  chunker: null,
  textChunkLimit: DISCORD_TEXT_CHUNK_LIMIT,
  pollMaxOptions: 10,
  resolveTarget: ({ to }) => normalizeDiscordOutboundTarget(to),
  sendPayload: async (ctx) => {
    const payload = {
      ...ctx.payload,
      text: ctx.payload.text ?? "",
    };
    const discordData = payload.channelData?.discord as
      | { components?: DiscordComponentMessageSpec }
      | undefined;
    const rawComponentSpec =
      discordData?.components ?? buildDiscordInteractiveComponents(payload.interactive);
    const componentSpec = rawComponentSpec
      ? rawComponentSpec.text
        ? rawComponentSpec
        : {
            ...rawComponentSpec,
            text: payload.text?.trim() ? payload.text : undefined,
          }
      : undefined;
    if (!componentSpec) {
      return await sendTextMediaPayload({
        channel: "discord",
        ctx: {
          ...ctx,
          payload,
        },
        adapter: discordOutbound,
      });
    }
    const send =
      resolveOutboundSendDep<typeof sendMessageDiscord>(ctx.deps, "discord") ?? sendMessageDiscord;
    const target = resolveDiscordOutboundTarget({ to: ctx.to, threadId: ctx.threadId });
    const mediaUrls = resolvePayloadMediaUrls(payload);
    if (mediaUrls.length === 0) {
      const result = await sendDiscordComponentMessage(target, componentSpec, {
        replyTo: ctx.replyToId ?? undefined,
        accountId: ctx.accountId ?? undefined,
        silent: ctx.silent ?? undefined,
        cfg: ctx.cfg,
      });
      return { channel: "discord", ...result };
    }
    const lastResult = await sendPayloadMediaSequence({
      text: payload.text ?? "",
      mediaUrls,
      send: async ({ text, mediaUrl, isFirst }) => {
        if (isFirst) {
          return await sendDiscordComponentMessage(target, componentSpec, {
            mediaUrl,
            mediaLocalRoots: ctx.mediaLocalRoots,
            replyTo: ctx.replyToId ?? undefined,
            accountId: ctx.accountId ?? undefined,
            silent: ctx.silent ?? undefined,
            cfg: ctx.cfg,
          });
        }
        return await send(target, text, {
          verbose: false,
          mediaUrl,
          mediaLocalRoots: ctx.mediaLocalRoots,
          replyTo: ctx.replyToId ?? undefined,
          accountId: ctx.accountId ?? undefined,
          silent: ctx.silent ?? undefined,
          cfg: ctx.cfg,
        });
      },
    });
    return lastResult
      ? { channel: "discord", ...lastResult }
      : { channel: "discord", messageId: "" };
  },
  sendText: async ({ cfg, to, text, accountId, deps, replyToId, threadId, identity, silent }) => {
    if (!silent) {
      const webhookResult = await maybeSendDiscordWebhookText({
        cfg,
        text,
        threadId,
        accountId,
        identity,
        replyToId,
      }).catch(() => null);
      if (webhookResult) {
        return { channel: "discord", ...webhookResult };
      }
    }
    const send =
      resolveOutboundSendDep<typeof sendMessageDiscord>(deps, "discord") ?? sendMessageDiscord;
    const target = resolveDiscordOutboundTarget({ to, threadId });
    const result = await send(target, text, {
      verbose: false,
      replyTo: replyToId ?? undefined,
      accountId: accountId ?? undefined,
      silent: silent ?? undefined,
      cfg,
    });
    return { channel: "discord", ...result };
  },
  sendMedia: async ({
    cfg,
    to,
    text,
    mediaUrl,
    mediaLocalRoots,
    accountId,
    deps,
    replyToId,
    threadId,
    silent,
  }) => {
    const send =
      resolveOutboundSendDep<typeof sendMessageDiscord>(deps, "discord") ?? sendMessageDiscord;
    const target = resolveDiscordOutboundTarget({ to, threadId });
    const result = await send(target, text, {
      verbose: false,
      mediaUrl,
      mediaLocalRoots,
      replyTo: replyToId ?? undefined,
      accountId: accountId ?? undefined,
      silent: silent ?? undefined,
      cfg,
    });
    return { channel: "discord", ...result };
  },
  sendPoll: async ({ cfg, to, poll, accountId, threadId, silent }) => {
    const target = resolveDiscordOutboundTarget({ to, threadId });
    return await sendPollDiscord(target, poll, {
      accountId: accountId ?? undefined,
      silent: silent ?? undefined,
      cfg,
    });
  },
};