'use client';

import { useEffect, useMemo } from 'react';
import { usePathname } from 'next/navigation';
import { useQuery, useQueries, keepPreviousData } from '@tanstack/react-query';
import { useT } from '@/i18n/I18nProvider';
import api from '@/lib/api';
import type { Application } from '@/types';
import { useAuthStore } from '@/lib/store';
import { useDeployProgressStore } from '@/lib/deploy-progress-store';
import { getAppsInProgress, isActiveBuildProgress } from '@/lib/deployment-progress';
import { filterApplications, filterManagedServices } from '@/lib/product-type';
import { BuildProgressModal, type BuildProgress } from '@/components/build-progress-modal';
import { DeploymentProgressBar } from '@/components/deployment-progress-bar';

function stubAppFromTrack(appId: string, appName: string): Application {
  return {
    id: appId,
    name: appName,
    runtime: 'nodejs',
    databaseType: 'none',
    cpuRequest: '',
    cpuLimit: '',
    memoryRequest: '',
    memoryLimit: '',
    replicas: 1,
    port: 3000,
    userId: '',
    createdAt: new Date().toISOString(),
    updatedAt: new Date().toISOString(),
    deployments: [
      {
        id: `pending-${appId}`,
        status: 'building',
        imageTag: '',
        applicationId: appId,
        triggeredBy: 'user',
        createdAt: new Date().toISOString(),
      },
    ],
  } as Application;
}

export function DeploymentProgressManager() {
  const t = useT();
  const isAuthenticated = useAuthStore((s) => s.isAuthenticated);
  const pathname = usePathname();
  const { minimized, focusedAppId, tracked, minimize, expand, stopTracking } =
    useDeployProgressStore();

  const pollAppsList = (list: Application[] | undefined) => {
    const pending = useDeployProgressStore.getState().tracked.length;
    return getAppsInProgress(list ?? []).length > 0 || pending > 0 ? 3000 : false;
  };

  const { data: appsList = [] } = useQuery<Application[]>({
    queryKey: ['applications', 'application'],
    queryFn: () => api.get('/applications', { params: { productType: 'application' } }).then((r) => r.data),
    enabled: isAuthenticated,
    refetchInterval: (query) => pollAppsList(query.state.data),
  });

  const { data: servicesList = [] } = useQuery<Application[]>({
    queryKey: ['applications', 'managed'],
    queryFn: () => api.get('/applications', { params: { productType: 'managed' } }).then((r) => r.data),
    enabled: isAuthenticated,
    refetchInterval: (query) => pollAppsList(query.state.data),
  });

  const allResources = useMemo(
    () => [...filterApplications(appsList), ...filterManagedServices(servicesList)],
    [appsList, servicesList],
  );

  const deployingFromList = useMemo(() => getAppsInProgress(allResources), [allResources]);

  const deployingApps = useMemo(() => {
    const byId = new Map<string, Application>();
    for (const app of deployingFromList) {
      byId.set(app.id, app);
    }
    for (const t of tracked) {
      if (!byId.has(t.appId)) {
        const fromList = allResources.find((a) => a.id === t.appId);
        byId.set(t.appId, fromList ?? stubAppFromTrack(t.appId, t.appName));
      }
    }
    return Array.from(byId.values());
  }, [deployingFromList, tracked, allResources]);

  const progressQueries = useQueries({
    queries: deployingApps.map((app) => ({
      queryKey: ['build-progress', app.id],
      queryFn: () =>
        api
          .get<{ progress: BuildProgress | null }>(`/deployments/applications/${app.id}/build-progress`)
          .then((r) => r.data.progress),
      refetchInterval: 1500,
      placeholderData: keepPreviousData,
      enabled: isAuthenticated,
    })),
  });

  const activeItems = useMemo(() => {
    return deployingApps.map((app, i) => ({
      app,
      progress: progressQueries[i]?.data ?? null,
    }));
  }, [deployingApps, progressQueries]);

  const routeAppId =
    pathname.match(/\/dashboard\/apps\/([^/]+)/)?.[1] ??
    pathname.match(/\/dashboard\/services\/([^/]+)/)?.[1];

  useEffect(() => {
    if (deployingApps.length === 0) {
      useDeployProgressStore.setState({ minimized: false, focusedAppId: null, tracked: [] });
    }
  }, [deployingApps.length]);

  useEffect(() => {
    if (activeItems.length === 0) return;
    const { focusedAppId: current } = useDeployProgressStore.getState();
    const ids = new Set(activeItems.map((item) => item.app.id));
    if (current && ids.has(current)) return;
    const preferred =
      (routeAppId && ids.has(routeAppId) ? routeAppId : null) ?? activeItems[0].app.id;
    useDeployProgressStore.setState({ focusedAppId: preferred });
  }, [activeItems, routeAppId]);

  useEffect(() => {
    for (const { app, progress } of activeItems) {
      if (!progress) continue;
      if (progress.phase === 'done' || progress.phase === 'failed' || progress.phase === 'cancelled') {
        const stillBuilding = deployingFromList.some((a) => a.id === app.id);
        if (!stillBuilding) {
          stopTracking(app.id);
        }
      }
    }
  }, [activeItems, deployingFromList, stopTracking]);

  const focusedItem =
    activeItems.find((item) => item.app.id === focusedAppId) ?? activeItems[0];

  const focusedProgress =
    focusedItem?.progress ??
    ({ phase: 'building', percent: 0, message: t.components.startingDeployment } satisfies BuildProgress);

  const showModal =
    !minimized &&
    !!focusedItem &&
    (!focusedItem.progress ||
      isActiveBuildProgress(focusedItem.progress) ||
      focusedItem.progress.phase === 'done');

  const handleMinimize = () => {
    if (focusedItem) minimize(focusedItem.app.id);
  };

  const handleExpand = (appId: string) => {
    expand(appId);
  };

  if (deployingApps.length === 0) return null;

  return (
    <>
      {minimized && (
        <div className="sticky top-0 z-40">
          <DeploymentProgressBar items={activeItems} onExpand={handleExpand} />
        </div>
      )}

      {showModal && (
        <BuildProgressModal
          appId={focusedItem.app.id}
          appName={focusedItem.app.name}
          progress={focusedProgress}
          onMinimize={handleMinimize}
        />
      )}
    </>
  );
}