import type { OpenClawPluginApi } from "openclaw/plugin-sdk";
import type { DirigentConfig } from "../rules.js";

type DiscordControlAction = "channel-private-create" | "channel-private-update";

type ToolDeps = {
  api: OpenClawPluginApi;
  baseConfig: DirigentConfig;
  pickDefined: (obj: Record<string, unknown>) => Record<string, unknown>;
  getLivePluginConfig: (api: OpenClawPluginApi, fallback: DirigentConfig) => DirigentConfig;
};

function parseAccountToken(api: OpenClawPluginApi, accountId?: string): { accountId: string; token: string } | null {
  const root = (api.config as Record<string, unknown>) || {};
  const channels = (root.channels as Record<string, unknown>) || {};
  const discord = (channels.discord as Record<string, unknown>) || {};
  const accounts = (discord.accounts as Record<string, Record<string, unknown>>) || {};

  if (accountId && accounts[accountId] && typeof accounts[accountId].token === "string") {
    return { accountId, token: accounts[accountId].token as string };
  }
  for (const [aid, rec] of Object.entries(accounts)) {
    if (typeof rec?.token === "string" && rec.token) return { accountId: aid, token: rec.token };
  }
  return null;
}

async function discordRequest(token: string, method: string, path: string, body?: unknown): Promise<{ ok: boolean; status: number; text: string; json: any }> {
  const r = await fetch(`https://discord.com/api/v10${path}`, {
    method,
    headers: {
      Authorization: `Bot ${token}`,
      "Content-Type": "application/json",
    },
    body: body === undefined ? undefined : JSON.stringify(body),
  });
  const text = await r.text();
  let json: any = null;
  try { json = text ? JSON.parse(text) : null; } catch { json = null; }
  return { ok: r.ok, status: r.status, text, json };
}

function roleOrMemberType(v: unknown): number {
  if (typeof v === "number") return v;
  if (typeof v === "string" && v.toLowerCase() === "member") return 1;
  return 0;
}

export function registerDirigentTools(deps: ToolDeps): void {
  const { api, baseConfig, pickDefined, getLivePluginConfig } = deps;

  async function executeDiscordAction(action: DiscordControlAction, params: Record<string, unknown>) {
    const live = getLivePluginConfig(api, baseConfig as DirigentConfig) as DirigentConfig & {
      enableDiscordControlTool?: boolean;
      discordControlAccountId?: string;
    };
    if (live.enableDiscordControlTool === false) {
      return { content: [{ type: "text", text: "discord actions disabled by config" }], isError: true };
    }

    const selected = parseAccountToken(api, (params.accountId as string | undefined) || live.discordControlAccountId);
    if (!selected) {
      return { content: [{ type: "text", text: "no Discord bot token found in channels.discord.accounts" }], isError: true };
    }
    const token = selected.token;

    if (action === "channel-private-create") {
      const guildId = String(params.guildId || "").trim();
      const name = String(params.name || "").trim();
      if (!guildId || !name) return { content: [{ type: "text", text: "guildId and name are required" }], isError: true };

      const allowedUserIds = Array.isArray(params.allowedUserIds) ? params.allowedUserIds.map(String) : [];
      const allowedRoleIds = Array.isArray(params.allowedRoleIds) ? params.allowedRoleIds.map(String) : [];
      const allowMask = String(params.allowMask || "1024");
      const denyEveryoneMask = String(params.denyEveryoneMask || "1024");

      const overwrites: any[] = [
        { id: guildId, type: 0, allow: "0", deny: denyEveryoneMask },
        ...allowedRoleIds.map((id) => ({ id, type: 0, allow: allowMask, deny: "0" })),
        ...allowedUserIds.map((id) => ({ id, type: 1, allow: allowMask, deny: "0" })),
      ];

      const body = pickDefined({
        name,
        type: typeof params.type === "number" ? params.type : 0,
        parent_id: params.parentId,
        topic: params.topic,
        position: params.position,
        nsfw: params.nsfw,
        permission_overwrites: overwrites,
      });

      const resp = await discordRequest(token, "POST", `/guilds/${guildId}/channels`, body);
      if (!resp.ok) return { content: [{ type: "text", text: `discord action failed (${resp.status}): ${resp.text}` }], isError: true };
      return { content: [{ type: "text", text: JSON.stringify({ ok: true, accountId: selected.accountId, channel: resp.json }, null, 2) }] };
    }

    const channelId = String(params.channelId || "").trim();
    if (!channelId) return { content: [{ type: "text", text: "channelId is required" }], isError: true };

    const mode = String(params.mode || "merge").toLowerCase() === "replace" ? "replace" : "merge";
    const addUserIds = Array.isArray(params.addUserIds) ? params.addUserIds.map(String) : [];
    const addRoleIds = Array.isArray(params.addRoleIds) ? params.addRoleIds.map(String) : [];
    const removeTargetIds = Array.isArray(params.removeTargetIds) ? params.removeTargetIds.map(String) : [];
    const allowMask = String(params.allowMask || "1024");
    const denyMask = String(params.denyMask || "0");

    const ch = await discordRequest(token, "GET", `/channels/${channelId}`);
    if (!ch.ok) return { content: [{ type: "text", text: `discord action failed (${ch.status}): ${ch.text}` }], isError: true };

    const current = Array.isArray(ch.json?.permission_overwrites) ? [...ch.json.permission_overwrites] : [];
    const guildId = String(ch.json?.guild_id || "");
    const everyone = current.find((x: any) => String(x?.id || "") === guildId && roleOrMemberType(x?.type) === 0);

    let next: any[] = mode === "replace" ? (everyone ? [everyone] : []) : current.filter((x: any) => !removeTargetIds.includes(String(x?.id || "")));
    for (const id of addRoleIds) {
      next = next.filter((x: any) => String(x?.id || "") !== id);
      next.push({ id, type: 0, allow: allowMask, deny: denyMask });
    }
    for (const id of addUserIds) {
      next = next.filter((x: any) => String(x?.id || "") !== id);
      next.push({ id, type: 1, allow: allowMask, deny: denyMask });
    }

    const resp = await discordRequest(token, "PATCH", `/channels/${channelId}`, { permission_overwrites: next });
    if (!resp.ok) return { content: [{ type: "text", text: `discord action failed (${resp.status}): ${resp.text}` }], isError: true };
    return { content: [{ type: "text", text: JSON.stringify({ ok: true, accountId: selected.accountId, channel: resp.json }, null, 2) }] };
  }

  api.registerTool({
    name: "discord_channel_create",
    description: "Create a private Discord channel with specific user/role permissions.",
    parameters: {
      type: "object",
      additionalProperties: false,
      properties: {
        accountId: { type: "string" },
        guildId: { type: "string" },
        name: { type: "string" },
        type: { type: "number" },
        parentId: { type: "string" },
        topic: { type: "string" },
        position: { type: "number" },
        nsfw: { type: "boolean" },
        allowedUserIds: { type: "array", items: { type: "string" } },
        allowedRoleIds: { type: "array", items: { type: "string" } },
        allowMask: { type: "string" },
        denyEveryoneMask: { type: "string" },
      },
      required: [],
    },
    async execute(_id: string, params: Record<string, unknown>) {
      return executeDiscordAction("channel-private-create", params);
    },
  }, { optional: false });

  api.registerTool({
    name: "discord_channel_update",
    description: "Update permissions on an existing private Discord channel.",
    parameters: {
      type: "object",
      additionalProperties: false,
      properties: {
        accountId: { type: "string" },
        channelId: { type: "string" },
        mode: { type: "string", enum: ["merge", "replace"] },
        addUserIds: { type: "array", items: { type: "string" } },
        addRoleIds: { type: "array", items: { type: "string" } },
        removeTargetIds: { type: "array", items: { type: "string" } },
        allowMask: { type: "string" },
        denyMask: { type: "string" },
      },
      required: [],
    },
    async execute(_id: string, params: Record<string, unknown>) {
      return executeDiscordAction("channel-private-update", params);
    },
  }, { optional: false });
}