import config from "@payload-config";
import { getPayload } from "payload";
import { headers as nextHeaders } from "next/headers";
import type { Assignment, Campaign, GameStructure, Map, Media, Rank, User } from "@/payload-types";
import { resolveLevel } from "@/utils/xp/resolveLevel";
import { hasIntelligenceQualification } from "@/utils/access-control/hasIntelligenceQualification";
import { ProfileSummary } from "@/components/frontend/dashboard/ProfileSummary";
import { MissionBriefing } from "@/components/frontend/dashboard/MissionBriefing";
import { RecentEvents } from "@/components/frontend/dashboard/RecentEvents";
import { QuickStats } from "@/components/frontend/dashboard/QuickStats";
import { UpcomingMissions } from "@/components/frontend/dashboard/UpcomingMissions";
import { ActiveCampaigns } from "@/components/frontend/dashboard/ActiveCampaigns";

export default async function HomePage() {
  const payload = await getPayload({ config });
  const headers = await nextHeaders();
  const { user } = await payload.auth({ headers, canSetHeaders: false });

  if (!user) return null;

  const userId = user.id;

  const hasIntelligence = await hasIntelligenceQualification(payload, user).catch(() => false);

  const [profileRes, experienceRes, assignmentRes] = await Promise.all([
    payload.find({
      collection: "profiles",
      where: { user: { equals: userId } },
      depth: 2,
      select: {
        user: true,
        rank: true,
        progression: { xp: true, awards: true, scoreboard: true, minigames: true },
        createdAt: true,
      },
    }),
    payload.find({
      collection: "experience",
      sort: "requiredPoints",
      limit: 100,
      select: { name: true, requiredPoints: true },
    }),
    payload.find({
      collection: "assignments",
      where: { members: { equals: userId } },
      limit: 10,
      select: { name: true, type: true, callsign: true },
    }),
  ]);

  const profile = profileRes.docs[0];
  const xp = profile?.progression?.xp ?? 0;
  const xpLevel = resolveLevel(xp, experienceRes.docs);
  const profileUser = profile?.user as User | undefined;
  const rank = profile?.rank as Rank | undefined;
  const assignments = assignmentRes.docs as Pick<Assignment, "name" | "type" | "callsign">[];

  const rankData = rank
    ? {
        name: rank.name,
        abbreviation: rank.abbreviation,
        insigniaUrl:
          rank.insignia && typeof rank.insignia === "object" ? (rank.insignia as Media).url : null,
      }
    : { name: "Unknown", abbreviation: "?" };

  // Fetch upcoming missions (Scheduled or Ready) — up to 5 for the sidebar
  const upcomingRes = await payload
    .find({
      collection: "missions",
      where: {
        "ownershipAndStatus.status": { in: ["Scheduled", "Ready"] },
      },
      sort: "classification.startDateTime",
      limit: 5,
      depth: 2,
    })
    .catch(() => ({ docs: [] }));

  // If no upcoming, get most recently completed for the briefing card
  let briefingMission = upcomingRes.docs[0] ?? null;
  if (!briefingMission) {
    const completedRes = await payload
      .find({
        collection: "missions",
        where: {
          "ownershipAndStatus.status": { equals: "Completed" },
        },
        sort: "-classification.startDateTime",
        limit: 1,
        depth: 2,
      })
      .catch(() => ({ docs: [] }));
    briefingMission = completedRes.docs[0] ?? null;
  }

  const mission = briefingMission
    ? {
        id: briefingMission.id,
        name: briefingMission.name,
        codeName: briefingMission.codeName,
        summary: briefingMission.summary,
        operationType: briefingMission.operationType,
        classification: {
          missionType: briefingMission.classification.missionType,
          startDateTime: briefingMission.classification.startDateTime,
          estimatedDuration: briefingMission.classification.estimatedDuration,
          map: briefingMission.classification.map as number | Map,
          campaign: briefingMission.classification.campaign as number | Campaign,
        },
        ownershipAndStatus: {
          status: briefingMission.ownershipAndStatus.status,
        },
        missionRoles: briefingMission.missionRoles
          ? { maxPlayers: briefingMission.missionRoles.maxPlayers }
          : null,
        coverImage: briefingMission.coverImage,
      }
      : null;

  const upcomingMissions = upcomingRes.docs.map((m) => ({
    id: m.id,
    name: m.name,
    codeName: m.codeName,
    summary: m.summary,
    operationType: m.operationType,
    classification: {
      missionType: m.classification.missionType,
      startDateTime: m.classification.startDateTime,
      estimatedDuration: m.classification.estimatedDuration,
      map: m.classification.map as number | Map,
      campaign: m.classification.campaign as number | Campaign,
    },
    ownershipAndStatus: {
      status: m.ownershipAndStatus.status,
    },
    missionRoles: m.missionRoles ? { maxPlayers: m.missionRoles.maxPlayers } : null,
    coverImage: m.coverImage,
  }));

  // Fetch recent events
  const eventsRes = await payload.find({
    collection: "game-event-logs",
    sort: "-timestamp",
    limit: 8,
    depth: 1,
  });

  const events = eventsRes.docs.map((e) => ({
    id: e.id,
    timestamp: e.timestamp,
    type: e.type,
    message: e.message,
    system: e.system ?? true,
    actor: e.actor as number | User | null | undefined,
    structure: e.structure as number | GameStructure | null | undefined,
  }));

  // Fetch active campaigns for the sidebar
  const activeCampaignsRes = await payload
    .find({
      collection: "campaigns",
      where: { status: { equals: "inProgress" } },
      limit: 5,
      sort: "-createdAt",
    })
    .catch(() => ({ docs: [] }));

  const activeCampaigns = activeCampaignsRes.docs.map((c) => ({
    id: c.id,
    name: c.name,
    summary: c.summary,
    status: c.status,
  }));

  // Fetch counts
  const [campaignsRes, missionsCountRes, structuresRes, factionsRes, profilesRes] =
    await Promise.all([
      payload.find({
        collection: "campaigns",
        where: { status: { equals: "inProgress" } },
        limit: 0,
      }),
      payload
        .find({
          collection: "missions",
          limit: 0,
        })
        .catch(() => ({ totalDocs: 0 })),
      payload.find({
        collection: "game-structures",
        limit: 0,
      }),
      payload.find({
        collection: "factions",
        limit: 0,
      }),
      payload.find({
        collection: "profiles",
        limit: 0,
      }),
    ]);

  return (
    <div className="p-5 flex flex-col gap-6">
      <div className="flex flex-col gap-1">
        <h1 className="text-lg font-semibold">
          Welcome back, {rankData.name}. {/*{profileUser?.displayName ?? user.username}*/}
        </h1>
        <p className="text-sm text-muted-foreground">Here&apos;s your operations dashboard.</p>
      </div>

      <div className="grid grid-cols-1 xl:grid-cols-3 gap-6">
        {/* ── Main Content (2/3) ──────────────────────────── */}
        <div className="xl:col-span-2 flex flex-col gap-6">
          <div className="grid grid-cols-1 lg:grid-cols-2 gap-4">
            {profile && profileUser && (
              <ProfileSummary
                displayName={profileUser.displayName}
                username={profileUser.username}
                rank={rankData}
                xpLevel={xpLevel}
                assignments={assignments}
              />
            )}
            <MissionBriefing mission={mission} />
          </div>

          <RecentEvents events={events} currentUserId={userId} />

          <QuickStats
            activeCampaigns={campaignsRes.totalDocs}
            totalMissions={missionsCountRes.totalDocs}
            totalStructures={structuresRes.totalDocs}
            totalFactions={factionsRes.totalDocs}
            totalMembers={profilesRes.totalDocs}
          />
        </div>

        {/* ── Right Sidebar (1/3) ─────────────────────────── */}
        <div className="flex flex-col gap-4">
          {hasIntelligence && <UpcomingMissions missions={upcomingMissions} />}
          {hasIntelligence && <ActiveCampaigns campaigns={activeCampaigns} />}
        </div>
      </div>
    </div>
  );
}