/*
FNXC:AppLifecycle 2026-06-24-00:00:
Module-level lifecycle helpers, storage-key constants, and banner/CLI-banner pure functions extracted out of App.tsx so the root component stays an orchestrator. Behavior is byte-identical to the former inline definitions; App.tsx re-exports the unit-tested symbols to preserve its import contract.
*/

import type { AiSessionSummary } from "../api";
import { api, relaunchCliSession } from "../api";
import type { CliActionId } from "../components/SessionNotificationBanner";

export const SETUP_WARNING_DISMISSED_KEY = "kb-setup-warning-dismissed";
export const WORKING_BRANCH_FILTER_STORAGE_KEY = "kb-dashboard-working-branch-filter";
export const BASE_BRANCH_FILTER_STORAGE_KEY = "kb-dashboard-base-branch-filter";
export const NO_BRANCH_FILTER_VALUE = "__fusion:no-branch__";
export const APPROVAL_BANNER_DISMISSED_STORAGE_KEY = "fusion:approval-banner-dismissed";
export const CAPACITY_RISK_DISMISSED_KEY = "kb-capacity-risk-banner-dismissed";
export const RETRY_WARNING_RATIO = 0.8;

export interface ApprovalBannerCandidate {
  dedupeKey: string;
  updatedAtMs: number;
}

export function didEnterAwaitingApproval(nextStatus: string | undefined, previousStatus: string | undefined): boolean {
  return nextStatus === "awaiting-approval" && previousStatus !== "awaiting-approval";
}

export function didEnterDone(nextStatus: string | undefined, previousStatus: string | undefined): boolean {
  return nextStatus === "done" && previousStatus !== undefined && previousStatus !== "done";
}

export function parseDateMs(value: string | undefined): number {
  if (!value) return 0;
  const parsed = Date.parse(value);
  return Number.isFinite(parsed) ? parsed : 0;
}

export function loadApprovalBannerDismissals(): Map<string, number> {
  if (typeof window === "undefined") return new Map();
  try {
    const raw = window.localStorage.getItem(APPROVAL_BANNER_DISMISSED_STORAGE_KEY);
    if (!raw) return new Map();
    const parsed = JSON.parse(raw) as Record<string, number>;
    const map = new Map<string, number>();
    for (const [key, value] of Object.entries(parsed)) {
      if (typeof value === "number" && Number.isFinite(value)) {
        map.set(key, value);
      }
    }
    return map;
  } catch {
    return new Map();
  }
}

export function persistApprovalBannerDismissals(map: Map<string, number>): void {
  if (typeof window === "undefined") return;
  try {
    const data: Record<string, number> = {};
    for (const [key, value] of map) {
      data[key] = value;
    }
    window.localStorage.setItem(APPROVAL_BANNER_DISMISSED_STORAGE_KEY, JSON.stringify(data));
  } catch {
    // no-op
  }
}

export function buildRemoteDashboardUrl(serverUrl: string, authToken?: string | null): string {
  const url = new URL(serverUrl);
  if (authToken) {
    url.searchParams.set("rt", authToken);
  }
  return url.toString();
}

export interface DesktopShellRedirectShellState {
  host: "web" | "mobile-shell" | "desktop-shell";
  desktopMode?: "local" | "remote";
  activeProfileId: string | null;
  profiles: Array<{ id: string; serverUrl: string; authToken?: string | null }>;
  localRuntime?: {
    state: "stopped" | "starting" | "running" | "error";
    port?: number;
    baseUrl?: string;
  };
}

/*
 * FNXC:DesktopSwitchServer 2026-07-04-13:20:
 * The in-dashboard "Switch server" (Connection Manager) affordance calls `shellApi.setDesktopMode(...)` /
 * `setActiveProfile(...)` directly and relies on THIS renderer-side redirect to navigate, because it does not
 * route through the Electron main-process launch-mode handlers (`desktopLaunchMode:setMode` in
 * packages/desktop/src/main.ts) the way the native menu does. The desktop preload only ever emits the live
 * `localRuntime` field (see native-shell.d.ts / packages/desktop/src/ipc.ts) — the legacy `localServer` field is
 * never populated and must not be used. This helper is the single decision point shared by both the local- and
 * remote-redirect effects in App.tsx so both switch directions behave like the working native-menu path and
 * so neither introduces a reload loop.
 */
export function resolveDesktopShellRedirectTarget(
  shellState: DesktopShellRedirectShellState,
  currentHref: string,
): string | null {
  if (shellState.host !== "desktop-shell") {
    return null;
  }

  if (shellState.desktopMode === "local") {
    const runtime = shellState.localRuntime;
    if (!runtime || runtime.state !== "running") {
      return null;
    }
    const baseUrl = runtime.baseUrl || (runtime.port ? `http://localhost:${runtime.port}` : undefined);
    if (!baseUrl) {
      return null;
    }
    if (currentHref === baseUrl) {
      return null;
    }
    try {
      const current = new URL(currentHref);
      const target = new URL(baseUrl);
      if (current.origin === target.origin) {
        return null;
      }
    } catch {
      // fall through and navigate — currentHref/baseUrl were not parseable URLs
    }
    return baseUrl;
  }

  if (shellState.desktopMode === "remote") {
    const activeProfile = shellState.profiles.find((profile) => profile.id === shellState.activeProfileId);
    if (!activeProfile) {
      return null;
    }
    const nextUrl = buildRemoteDashboardUrl(activeProfile.serverUrl, activeProfile.authToken ?? null);
    if (currentHref === nextUrl) {
      return null;
    }
    return nextUrl;
  }

  return null;
}

export function requiresNativeShellOnboarding(
  shellState: { host: "web" | "mobile-shell" | "desktop-shell"; desktopMode?: "local" | "remote"; activeProfileId: string | null },
  shellReady: boolean,
  shellOnboardingComplete: boolean,
): boolean {
  if (!shellReady || shellOnboardingComplete || shellState.host === "web") {
    return false;
  }

  if (shellState.host === "mobile-shell") {
    return !shellState.activeProfileId;
  }

  if (shellState.desktopMode === "local") {
    return false;
  }

  return !shellState.activeProfileId;
}

export function shouldShowFirstEverBootLoader(projectsLoading: boolean, projectCount: number): boolean {
  return projectsLoading && projectCount === 0;
}

export function isSessionNeedingInputForBanner(session: AiSessionSummary): boolean {
  return (
    session.status === "awaiting_input" ||
    session.status === "error" ||
    session.status === "waiting_on_input" ||
    session.status === "needs_attention"
  );
}

/*
FNXC:SessionBanner 2026-07-05-00:00:
Planning-Mode "awaiting input" is no longer a SessionNotificationBanner entry: the banner's Resume button did not
reliably redirect into the Planning Mode interface, so awaiting-input planning sessions are now surfaced as a yellow
`status-dot--pending` badge on the Planning nav destination instead (LeftSidebarNav + MobileNavBar), whose click
target is the already-correct `planning` view navigation. Planning sessions in `error` status are unaffected and
still render in the banner via `isSessionNeedingInputForBanner` above.
*/
export function isPlanningAwaitingInput(session: AiSessionSummary): boolean {
  return session.type === "planning" && session.status === "awaiting_input";
}

export function getCliActionDisabledReasonForBanner(session: AiSessionSummary, action: CliActionId): string | null {
  if ((action === "advance" || action === "relaunch") && !session.cliSessionId) {
    return "CLI session id is missing.";
  }
  return null;
}

export interface CliActionDeps {
  currentProjectId?: string;
  retryTask: (id: string) => Promise<unknown>;
  moveTask: (id: string, column: "todo") => Promise<unknown>;
  openAuthenticationSettings: () => void;
  addToast: (message: string, type: "success" | "error") => void;
  apiClient?: typeof api;
  relaunchCliSessionClient?: typeof relaunchCliSession;
}

export async function executeCliSessionBannerAction(
  session: AiSessionSummary,
  action: CliActionId,
  deps: CliActionDeps,
): Promise<void> {
  try {
    /*
     * FNXC:SessionBanner 2026-06-14-19:32:
     * CLI banner verbs must either call an existing dashboard route/flow or be disabled by the banner. `advance` confirms the CLI session, `retry` and `cancel` reuse task operations keyed by the session id until summaries expose a distinct task id, and `reauthenticate` opens the existing authentication settings flow.
     *
     * FNXC:SessionBanner 2026-06-14-20:16:
     * `relaunch` is now a supported route-backed action for resume-exhausted CLI sessions; if `cliSessionId` is absent the handler exits without firing a malformed API call, preserving the no-silent-no-op invariant through the banner disabled reason.
     */
    if (action === "advance") {
      if (!session.cliSessionId) {
        throw new Error("CLI session id is required to advance this session.");
      }
      await (deps.apiClient ?? api)(`/cli-sessions/${encodeURIComponent(session.cliSessionId)}/confirm-advance`, {
        method: "POST",
        body: JSON.stringify({ decision: "advance", ...(deps.currentProjectId ? { projectId: deps.currentProjectId } : {}) }),
      });
      return;
    }

    if (action === "relaunch") {
      if (!session.cliSessionId) return;
      await (deps.relaunchCliSessionClient ?? relaunchCliSession)(session.cliSessionId, deps.currentProjectId);
      deps.addToast("CLI session relaunch requested", "success");
      return;
    }

    if (action === "retry") {
      await deps.retryTask(session.id);
      return;
    }

    if (action === "cancel") {
      await deps.moveTask(session.id, "todo");
      return;
    }

    if (action === "reauthenticate") {
      deps.openAuthenticationSettings();
      return;
    }

    throw new Error("This CLI action is not supported yet.");
  } catch (err) {
    const message = err instanceof Error ? err.message : "CLI action failed";
    deps.addToast(message, "error");
  }
}