/**
 * Deterministic social mock: publish (text/images/carousel), feed, comments,
 * replies, webhooks. In-memory state — CI runs need no network.
 */
import type {
  Comment,
  ConnectorCapabilities,
  ConnectorConnection,
  FeedItem,
  NormalizedIdentity,
  NormalizedPost,
  NormalizedWebhookEvent,
  Page,
  Publication,
} from "@tactical-media-broadcast-hub/core";
import {
  assertValidManifest,
  pageOf,
  type ConnectorManifest,
  type PlatformConnector,
} from "@tactical-media-broadcast-hub/connector-sdk";

const CAPABILITIES: ConnectorCapabilities = {
  publishText: true,
  publishImages: true,
  publishCarousel: true,
  feed: true,
  mentions: true,
  comments: true,
  replies: true,
  amplifyRepost: true,
  amplifyQuote: true,
  webhooks: true,
  deletePublication: true,
};

let seq = 0;
const nextId = (prefix: string): string => `${prefix}-${(seq += 1)}`;

export interface MockSocialState {
  publications: Map<string, Publication>;
  feed: FeedItem[];
  comments: Map<string, Comment[]>;
}

export function createMockSocialState(): MockSocialState {
  return { publications: new Map(), feed: [], comments: new Map() };
}

export function createMockSocialConnector(
  state: MockSocialState = createMockSocialState(),
): PlatformConnector {
  const manifest: ConnectorManifest = {
    id: "mock-social",
    displayName: "Mock Social",
    capabilities: CAPABILITIES,
    connectionFields: [{ name: "apiToken", label: "API token", required: true, secret: true }],
    webhookRoute: "/webhooks/mock-social",
  };

  return {
    manifest: () => {
      assertValidManifest(manifest);
      return manifest;
    },

    async authorize() {
      throw new Error("mock-social uses token auth in tests only");
    },

    async getIdentity(connection: ConnectorConnection): Promise<NormalizedIdentity> {
      return {
        provider: manifest.id,
        remoteId: connection.channelId,
        handle: "mock@social",
        displayName: "Mock Social Account",
      };
    },

    async publish(connection: ConnectorConnection, post: NormalizedPost): Promise<Publication> {
      const publication: Publication = {
        id: nextId("pub"),
        workspaceId: connection.workspaceId,
        draftId: "direct",
        connectionId: connection.id,
        remoteId: nextId("remote"),
        publishedAt: new Date(),
        providerMetadata: post.providerMetadata,
      };
      state.publications.set(publication.remoteId, publication);
      state.feed.unshift({
        id: publication.remoteId,
        provider: manifest.id,
        remoteId: publication.remoteId,
        authorHandle: "mock@social",
        text: post.text,
        mediaUrls: [],
        createdAt: publication.publishedAt,
        metrics: {},
      });
      return publication;
    },

    async deletePublication(_connection: ConnectorConnection, remoteId: string): Promise<void> {
      state.publications.delete(remoteId);
      state.feed = state.feed.filter((item) => item.remoteId !== remoteId);
    },

    async getFeed(
      _connection: ConnectorConnection,
      request: { kind: "home" | "mentions" | "search"; query?: string; cursor?: string; limit: number },
    ): Promise<Page<FeedItem>> {
      const filtered =
        request.kind === "search" && request.query
          ? state.feed.filter((item) => item.text.includes(request.query ?? ""))
          : state.feed;
      const start = request.cursor ? Number(request.cursor) : 0;
      const items = filtered.slice(start, start + request.limit);
      const next = start + request.limit;
      return next < filtered.length ? pageOf(items, String(next)) : pageOf(items);
    },

    async getComments(
      _connection: ConnectorConnection,
      request: { onRemoteId: string; cursor?: string; limit: number },
    ): Promise<Page<Comment>> {
      const all = state.comments.get(request.onRemoteId) ?? [];
      return pageOf(all.slice(0, request.limit));
    },

    async reply(
      connection: ConnectorConnection,
      request: { onRemoteId: string; text: string },
    ): Promise<Publication> {
      const existing = state.comments.get(request.onRemoteId) ?? [];
      const comment: Comment = {
        id: nextId("comment"),
        provider: manifest.id,
        remoteId: nextId("cremote"),
        onRemoteId: request.onRemoteId,
        authorHandle: "mock@social",
        text: request.text,
        createdAt: new Date(),
      };
      existing.push(comment);
      state.comments.set(request.onRemoteId, existing);
      return {
        id: comment.id,
        workspaceId: connection.workspaceId,
        draftId: "reply",
        connectionId: connection.id,
        remoteId: comment.remoteId,
        publishedAt: comment.createdAt,
        providerMetadata: {},
      };
    },

    async amplify(
      connection: ConnectorConnection,
      request: { kind: "repost" | "quote" | "share"; targetRemoteId: string; commentary?: string },
    ): Promise<Publication> {
      const target = state.feed.find((item) => item.remoteId === request.targetRemoteId);
      if (target === undefined) throw new Error(`no item ${request.targetRemoteId} to amplify`);
      const amplified: Publication = {
        id: nextId("amp"),
        workspaceId: connection.workspaceId,
        draftId: `amplify:${request.kind}`,
        connectionId: connection.id,
        remoteId: nextId("remote"),
        publishedAt: new Date(),
        providerMetadata: { amplifies: request.targetRemoteId, kind: request.kind },
      };
      state.feed.unshift({
        id: amplified.remoteId,
        provider: manifest.id,
        remoteId: amplified.remoteId,
        authorHandle: "mock@social",
        text: request.kind === "quote" ? `${request.commentary ?? ""} ↻ ${target.text}` : `↻ ${target.text}`,
        mediaUrls: [],
        createdAt: amplified.publishedAt,
        metrics: {},
      });
      return amplified;
    },

    async subscribeWebhooks() {
      return { subscriptionId: nextId("hook") };
    },

    async handleWebhook(request: { headers: Record<string, string>; body: unknown }): Promise<NormalizedWebhookEvent> {
      return {
        provider: manifest.id,
        eventType: "mock.event",
        payload: (request.body as Record<string, unknown>) ?? {},
        receivedAt: new Date(),
      };
    },
  };
}