import type { StoreApi } from "zustand";
import type { AppState } from "@/lib/state/store";
import type { WsHandlers } from "@/lib/ws/handlers/types";
import { toAgentProfileOption } from "@/lib/state/slices/settings/types";

// eslint-disable-next-line @typescript-eslint/no-explicit-any
function buildProfileEntry(profile: any) {
  return {
    id: profile.id,
    agent_id: profile.agent_id,
    name: profile.name,
    agent_display_name: profile.agent_display_name,
    model: profile.model,
    auto_approve: profile.auto_approve,
    dangerously_skip_permissions: profile.dangerously_skip_permissions,
    allow_indexing: profile.allow_indexing,
    cli_flags: profile.cli_flags ?? [],
    cli_passthrough: profile.cli_passthrough ?? false,
    plan: profile.plan,
    created_at: profile.created_at ?? "",
    updated_at: profile.updated_at ?? "",
  };
}

// eslint-disable-next-line @typescript-eslint/no-explicit-any
function handleProfileCreated(state: AppState, profile: any): Partial<AppState> {
  const agent = state.settingsAgents.items.find((a) => a.id === profile.agent_id);
  const agentStub = { id: profile.agent_id, name: agent?.name ?? "" };
  const nextProfiles = [
    ...state.agentProfiles.items.filter((p) => p.id !== profile.id),
    toAgentProfileOption(agentStub, profile),
  ];
  const nextAgents = state.settingsAgents.items.map((item) =>
    item.id === profile.agent_id
      ? {
          ...item,
          profiles: [
            ...item.profiles.filter((p) => p.id !== profile.id),
            buildProfileEntry(profile),
          ],
        }
      : item,
  );
  return {
    agentProfiles: { ...state.agentProfiles, items: nextProfiles },
    settingsAgents: { items: nextAgents },
  };
}

// eslint-disable-next-line @typescript-eslint/no-explicit-any
function handleProfileUpdated(state: AppState, profile: any): Partial<AppState> {
  const agent = state.settingsAgents.items.find((a) => a.id === profile.agent_id);
  const agentStub = { id: profile.agent_id, name: agent?.name ?? "" };
  const nextProfiles = state.agentProfiles.items.map((p) =>
    p.id === profile.id ? toAgentProfileOption(agentStub, profile) : p,
  );
  const nextAgents = state.settingsAgents.items.map((item) =>
    item.id === profile.agent_id
      ? {
          ...item,
          profiles: item.profiles.map((p) =>
            p.id === profile.id
              ? {
                  ...p,
                  name: profile.name,
                  agent_display_name: profile.agent_display_name,
                  model: profile.model,
                  auto_approve: profile.auto_approve,
                  dangerously_skip_permissions: profile.dangerously_skip_permissions,
                  allow_indexing: profile.allow_indexing,
                  cli_flags: profile.cli_flags ?? p.cli_flags ?? [],
                  plan: profile.plan,
                  updated_at: profile.updated_at ?? p.updated_at,
                }
              : p,
          ),
        }
      : item,
  );
  return {
    agentProfiles: { ...state.agentProfiles, items: nextProfiles },
    settingsAgents: { items: nextAgents },
  };
}

export function registerAgentsHandlers(store: StoreApi<AppState>): WsHandlers {
  return {
    "agent.available.updated": (message) => {
      store.setState((state) => ({
        ...state,
        availableAgents: {
          items: message.payload.agents ?? [],
          tools: message.payload.tools ?? state.availableAgents.tools,
          loaded: true,
          loading: false,
        },
      }));
    },
    "agent.install.started": (message) => {
      // Payload is the full job snapshot (queued → running transitions both emit this).
      store.getState().upsertInstallJob(message.payload);
    },
    "agent.install.output": (message) => {
      const { agent_name, chunk } = message.payload as {
        agent_name: string;
        chunk: string;
      };
      store.getState().appendInstallOutput(agent_name, chunk);
    },
    "agent.install.finished": (message) => {
      store.getState().upsertInstallJob(message.payload);
    },
    "agent.updated": (message) => {
      store.setState((state) => ({
        ...state,
        agents: {
          agents: state.agents.agents.some((a) => a.id === message.payload.agentId)
            ? state.agents.agents.map((a) =>
                a.id === message.payload.agentId ? { ...a, status: message.payload.status } : a,
              )
            : [
                ...state.agents.agents,
                { id: message.payload.agentId, status: message.payload.status },
              ],
        },
      }));
    },
    "agent.profile.created": (message) => {
      store.setState((state) => ({
        ...state,
        ...handleProfileCreated(state, message.payload.profile),
      }));
    },
    "agent.profile.updated": (message) => {
      store.setState((state) => ({
        ...state,
        ...handleProfileUpdated(state, message.payload.profile),
      }));
    },
    "agent.profile.deleted": (message) => {
      store.setState((state) => ({
        ...state,
        agentProfiles: {
          ...state.agentProfiles,
          items: state.agentProfiles.items.filter((p) => p.id !== message.payload.profile.id),
        },
        settingsAgents: {
          items: state.settingsAgents.items.map((item) =>
            item.id === message.payload.profile.agent_id
              ? {
                  ...item,
                  profiles: item.profiles.filter((p) => p.id !== message.payload.profile.id),
                }
              : item,
          ),
        },
      }));
    },
  };
}