import type { WorldDelta, WorldSnapshot } from "./contracts";
import type { TelemetrySnapshot } from "./contractsTelemetry";
import type { BalanceSettings } from "./contractsBalance";
import type { PlayerFactionSnapshot } from "./contractsPlayerFaction";
import type { RaceSnapshot } from "./contractsRaces";
import type { AuthSessionResponse, ForgotPasswordResponse, RegisterResponse } from "./contractsAuth";
import type { PlayerIdentitySummary } from "./contractsIdentity";
import type { ShipAutomationCatalogSnapshot } from "./contractsShipAutomation";
import type { FactionSnapshot } from "./contractsFactions";
import type { ShipSnapshot } from "./contractsShips";
import type { StationSnapshot } from "./contractsInfrastructure";
import { clearAuthSession, getAuthSession, setAuthSession } from "./authSession";
import { getEffectivePlayerIdentityId } from "./effectiveIdentitySession";
import type {
  PlayerAssetAssignmentCommandRequest,
  PlayerAutomationPolicyCommandRequest,
  PlayerDirectiveCommandRequest,
  PlayerOrganizationCommandRequest,
  PlayerOrganizationMembershipCommandRequest,
  PlayerPolicyCommandRequest,
  PlayerStrategicIntentCommandRequest,
} from "./playerFactionCommands";
import type {
  ShipDefaultBehaviorCommandRequest,
  ShipOrderCommandRequest,
} from "./shipCommands";

export interface WorldStreamScope {
  scopeKind?: string;
  systemId?: string | null;
  bubbleId?: string | null;
}

async function fetchJson<T>(input: RequestInfo | URL, init?: RequestInit, options?: { skipAuth?: boolean; skipRefresh?: boolean }): Promise<T> {
  const headers = new Headers(init?.headers);
  if (!options?.skipAuth) {
    const session = getAuthSession();
    if (session?.accessToken) {
      headers.set("Authorization", `Bearer ${session.accessToken}`);
    }
    if (session?.roles.some((role) => role === "gm" || role === "admin")) {
      const effectivePlayerId = getEffectivePlayerIdentityId();
      if (effectivePlayerId) {
        headers.set("X-Act-As-Player-Id", effectivePlayerId);
      }
    }
  }

  const response = await fetch(input, {
    ...init,
    headers,
  });
  if (response.status === 401 && !options?.skipAuth && !options?.skipRefresh) {
    const refreshed = await tryRefreshSession();
    if (refreshed) {
      return fetchJson<T>(input, init, { skipRefresh: true });
    }
  }
  if (!response.ok) {
    throw new Error(`${init?.method ?? "GET"} ${typeof input === "string" ? input : input.toString()} failed with ${response.status}`);
  }
  return response.json() as Promise<T>;
}

async function tryRefreshSession(): Promise<boolean> {
  const session = getAuthSession();
  if (!session?.refreshToken) {
    return false;
  }

  const response = await fetch("/api/auth/refresh", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ refreshToken: session.refreshToken }),
  });
  if (!response.ok) {
    clearAuthSession();
    return false;
  }

  const nextSession = await response.json() as AuthSessionResponse;
  setAuthSession(nextSession);
  return true;
}

export async function fetchWorldSnapshot(signal?: AbortSignal) {
  return fetchJson<WorldSnapshot>("/api/world", { signal }, { skipAuth: true });
}

export function openWorldStream(
  afterSequence: number,
  handlers: {
    onDelta: (delta: WorldDelta, rawBytes: number) => void;
    onOpen?: () => void;
    onError?: () => void;
  },
  scope?: WorldStreamScope,
) {
  const query = new URLSearchParams({
    afterSequence: String(afterSequence),
  });
  if (scope?.scopeKind) {
    query.set("scopeKind", scope.scopeKind);
  }
  if (scope?.systemId) {
    query.set("systemId", scope.systemId);
  }
  if (scope?.bubbleId) {
    query.set("bubbleId", scope.bubbleId);
  }

  const stream = new EventSource(`/api/world/stream?${query.toString()}`);
  stream.addEventListener("open", () => handlers.onOpen?.());
  stream.addEventListener("error", () => handlers.onError?.());
  stream.addEventListener("world-delta", (event) => {
    const message = event as MessageEvent<string>;
    handlers.onDelta(
      JSON.parse(message.data) as WorldDelta,
      new Blob([message.data]).size,
    );
  });
  return stream;
}

export async function fetchTelemetry(signal?: AbortSignal) {
  return fetchJson<TelemetrySnapshot>("/api/telemetry", { signal });
}

export async function fetchBalance(signal?: AbortSignal) {
  return fetchJson<BalanceSettings>("/api/balance", { signal });
}

export async function updateBalance(settings: BalanceSettings) {
  return fetchJson<BalanceSettings>("/api/balance", {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(settings),
  });
}

export async function createFaction(request: { factionId: string }) {
  return fetchJson<FactionSnapshot>("/api/gm/factions", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  });
}

export async function spawnShip(request: { factionId: string; systemId: string; shipId?: string | null; behaviorKind?: string | null }) {
  return fetchJson<ShipSnapshot>("/api/gm/ships", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  });
}

export async function spawnStation(request: { factionId: string; systemId: string; objective?: string | null; label?: string | null }) {
  return fetchJson<StationSnapshot>("/api/gm/stations", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  });
}

export async function resetWorld() {
  return fetchJson<WorldSnapshot>("/api/world/reset", {
    method: "POST",
  });
}

export async function register(request: { email: string; password: string }) {
  return fetchJson<RegisterResponse>("/api/auth/register", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  }, { skipAuth: true, skipRefresh: true });
}

export async function login(request: { email: string; password: string }) {
  const session = await fetchJson<AuthSessionResponse>("/api/auth/login", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  }, { skipAuth: true, skipRefresh: true });
  setAuthSession(session);
  return session;
}

export async function forgotPassword(request: { email: string }) {
  return fetchJson<ForgotPasswordResponse>("/api/auth/forgot-password", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  }, { skipAuth: true, skipRefresh: true });
}

export async function resetPassword(request: { token: string; newPassword: string }) {
  await fetchJson<void>("/api/auth/reset-password", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  }, { skipAuth: true, skipRefresh: true });
}

export async function fetchPlayerFaction(signal?: AbortSignal) {
  return fetchJson<PlayerFactionSnapshot>("/api/player-faction", { signal });
}

export async function fetchRaces(signal?: AbortSignal) {
  return fetchJson<RaceSnapshot[]>("/api/auth/races", { signal }, { skipAuth: true });
}

export async function completePlayerOnboarding(request: { name: string; raceId: string }) {
  return fetchJson<PlayerFactionSnapshot>("/api/player-faction/onboarding", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  });
}

export async function fetchPlayerIdentities(signal?: AbortSignal) {
  return fetchJson<PlayerIdentitySummary[]>("/api/player-faction/identities", { signal });
}

export async function fetchShipAutomationCatalog(signal?: AbortSignal) {
  return fetchJson<ShipAutomationCatalogSnapshot>("/api/ships/catalog", { signal }, { skipAuth: true });
}

export async function createPlayerOrganization(request: PlayerOrganizationCommandRequest) {
  return fetchJson<PlayerFactionSnapshot>("/api/player-faction/organizations", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  });
}

export async function deletePlayerOrganization(organizationId: string) {
  return fetchJson<PlayerFactionSnapshot>(`/api/player-faction/organizations/${organizationId}`, {
    method: "DELETE",
  });
}

export async function updatePlayerOrganizationMembership(organizationId: string, request: PlayerOrganizationMembershipCommandRequest) {
  return fetchJson<PlayerFactionSnapshot>(`/api/player-faction/organizations/${organizationId}/membership`, {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  });
}

export async function upsertPlayerDirective(request: PlayerDirectiveCommandRequest, directiveId?: string | null) {
  const path = directiveId ? `/api/player-faction/directives/${directiveId}` : "/api/player-faction/directives";
  return fetchJson<PlayerFactionSnapshot>(path, {
    method: directiveId ? "PUT" : "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  });
}

export async function deletePlayerDirective(directiveId: string) {
  return fetchJson<PlayerFactionSnapshot>(`/api/player-faction/directives/${directiveId}`, {
    method: "DELETE",
  });
}

export async function upsertPlayerAssignment(assetId: string, request: PlayerAssetAssignmentCommandRequest) {
  return fetchJson<PlayerFactionSnapshot>(`/api/player-faction/assignments/${assetId}`, {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  });
}

export async function upsertPlayerPolicy(request: PlayerPolicyCommandRequest, policyId?: string | null) {
  const path = policyId ? `/api/player-faction/policies/${policyId}` : "/api/player-faction/policies";
  return fetchJson<PlayerFactionSnapshot>(path, {
    method: policyId ? "PUT" : "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  });
}

export async function upsertPlayerAutomationPolicy(request: PlayerAutomationPolicyCommandRequest, automationPolicyId?: string | null) {
  const path = automationPolicyId ? `/api/player-faction/automation-policies/${automationPolicyId}` : "/api/player-faction/automation-policies";
  return fetchJson<PlayerFactionSnapshot>(path, {
    method: automationPolicyId ? "PUT" : "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  });
}

export async function updatePlayerStrategicIntent(request: PlayerStrategicIntentCommandRequest) {
  return fetchJson<PlayerFactionSnapshot>("/api/player-faction/strategic-intent", {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  });
}

export async function enqueueShipOrder(shipId: string, request: ShipOrderCommandRequest) {
  return fetchJson<ShipSnapshot>(`/api/ships/${shipId}/orders`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  });
}

export async function updateShipDefaultBehavior(shipId: string, request: ShipDefaultBehaviorCommandRequest) {
  return fetchJson<ShipSnapshot>(`/api/ships/${shipId}/default-behavior`, {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(request),
  });
}

export async function removeShipOrder(shipId: string, orderId: string) {
  return fetchJson<ShipSnapshot>(`/api/ships/${shipId}/orders/${orderId}`, {
    method: "DELETE",
  });
}