import config from "@payload-config";
import { getPayload } from "payload";
import { notFound } from "next/navigation";
import Link from "next/link";
import type { Campaign, Faction, Mission } from "@/payload-types";
import { RichText } from "@payloadcms/richtext-lexical/react";
import {
  ArrowLeftIcon,
  CalendarDaysIcon,
  ChevronRightIcon,
  CrosshairIcon,
  ShieldIcon,
  TargetIcon,
  UsersIcon,
} from "lucide-react";
import {
  Item,
  ItemContent,
  ItemDescription,
  ItemHeader,
  ItemTitle,
} from "@/components/ui/item";

interface CampaignDetailPageProps {
  params: Promise<{ id: string }>;
}

const statusColors: Record<string, string> = {
  concept: "bg-muted text-muted-foreground",
  inProgress: "bg-blue-500/20 text-blue-400",
  completed: "bg-emerald-500/20 text-emerald-400",
};

const factionTypeColors: Record<string, string> = {
  majorFaction: "bg-blue-500/20 text-blue-400",
  minorFaction: "bg-muted text-muted-foreground",
  corporation: "bg-amber-500/20 text-amber-400",
  special: "bg-purple-500/20 text-purple-400",
};

const missionStatusColors: Record<string, string> = {
  Concept: "bg-muted text-muted-foreground",
  Planning: "bg-muted text-muted-foreground",
  Ready: "bg-blue-500/20 text-blue-400",
  Scheduled: "bg-amber-500/20 text-amber-400",
  Active: "bg-green-500/20 text-green-400",
  Completed: "bg-emerald-500/20 text-emerald-400",
  Cancelled: "bg-red-500/20 text-red-400",
};

export default async function CampaignDetailPage({
  params,
}: CampaignDetailPageProps) {
  const { id } = await params;
  const payload = await getPayload({ config });

  const campaign = await payload
    .findByID({
      collection: "campaigns",
      id: Number(id),
      depth: 0,
    })
    .catch(() => null);

  if (!campaign) {
    notFound();
  }

  const [missionsRes, factionsRes] = await Promise.all([
    payload
      .find({
        collection: "missions",
        where: { "classification.campaign": { equals: campaign.id } },
        sort: "-classification.startDateTime",
        limit: 100,
        depth: 1,
        select: {
          name: true,
          codeName: true,
          summary: true,
          operationType: true,
          classification: true,
          ownershipAndStatus: true,
          missionRoles: true,
        },
      })
      .catch(() => ({ docs: [] })),
    payload.find({
      collection: "factions",
      where: { associatedCampaigns: { equals: campaign.id } },
      limit: 100,
      depth: 0,
      select: { name: true, type: true, description: true },
    }),
  ]);

  const missions = missionsRes.docs as Mission[];
  const factions = factionsRes.docs as Faction[];

  const startDate = campaign.startDate
    ? new Date(campaign.startDate).toLocaleDateString("en-US", {
        year: "numeric",
        month: "short",
        day: "numeric",
      })
    : null;
  const endDate = campaign.endDate
    ? new Date(campaign.endDate).toLocaleDateString("en-US", {
        year: "numeric",
        month: "short",
        day: "numeric",
      })
    : null;

  // Mission status breakdown
  const statusCounts: Record<string, number> = {};
  for (const m of missions) {
    const s = m.ownershipAndStatus.status;
    statusCounts[s] = (statusCounts[s] ?? 0) + 1;
  }

  return (
    <div className="p-5 flex flex-col gap-6 max-w-7xl">
      <Link
        href="/intelligence/campaigns"
        className="text-sm text-muted-foreground hover:text-primary transition-colors flex items-center gap-1 w-fit"
      >
        <ArrowLeftIcon className="size-3" />
        Back to Campaigns
      </Link>

      <div className="flex items-start justify-between gap-4">
        <div className="flex flex-col gap-1">
          <div className="flex items-center gap-2">
            <ShieldIcon className="size-5 text-muted-foreground" />
            <h1 className="text-lg font-semibold">{campaign.name}</h1>
          </div>
          <div className="flex items-center gap-2">
            <span
              className={`text-[10px] font-semibold uppercase tracking-wider px-1.5 py-0.5 rounded ${statusColors[campaign.status] ?? "bg-muted text-muted-foreground"}`}
            >
              {campaign.status === "inProgress"
                ? "In Progress"
                : campaign.status.charAt(0).toUpperCase() +
                  campaign.status.slice(1)}
            </span>
            {startDate && (
              <span className="text-xs text-muted-foreground flex items-center gap-1">
                <CalendarDaysIcon className="size-3" />
                {startDate}
                {endDate ? ` — ${endDate}` : " — Present"}
              </span>
            )}
          </div>
        </div>
      </div>

      <p className="text-sm text-muted-foreground">{campaign.summary}</p>

      <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">
          {campaign.description && (
            <Item variant="outline">
              <ItemHeader>
                <ItemTitle>Description</ItemTitle>
              </ItemHeader>
              <ItemContent className="prose-invert prose-sm max-w-none [&_p]:mb-2 [&_ul]:list-disc [&_ul]:ml-4 [&_ol]:list-decimal [&_ol]:ml-4 [&_strong]:text-foreground [&_em]:italic">
                <RichText data={campaign.description} />
              </ItemContent>
            </Item>
          )}

          <section className="flex flex-col gap-3">
            <div className="flex items-center justify-between">
              <h2 className="text-sm font-semibold uppercase tracking-wider text-muted-foreground">
                Missions
              </h2>
              <span className="text-xs text-muted-foreground">
                {missions.length} mission{missions.length !== 1 ? "s" : ""}
              </span>
            </div>
            {missions.length > 0 ? (
              <div className="flex flex-col gap-2">
                {missions.map((mission) => (
                  <Link
                    key={mission.id}
                    href={`/intelligence/missions/${mission.id}`}
                  >
                    <Item
                      variant="outline"
                      className="cursor-pointer group transition-all duration-200 hover:scale-[1.01]"
                    >
                      <ItemHeader>
                        <div className="flex flex-col gap-0.5">
                          <span className="font-mono text-xs text-muted-foreground">
                            {mission.codeName}
                          </span>
                          <ItemTitle>{mission.name}</ItemTitle>
                        </div>
                        <span
                          className={`text-[10px] font-semibold uppercase tracking-wider px-1.5 py-0.5 rounded ${
                            missionStatusColors[
                              mission.ownershipAndStatus.status
                            ] ?? "bg-muted text-muted-foreground"
                          }`}
                        >
                          {mission.ownershipAndStatus.status}
                        </span>
                      </ItemHeader>
                      <ItemContent>
                        <ItemDescription className="line-clamp-1">
                          {mission.summary}
                        </ItemDescription>
                      </ItemContent>
                    </Item>
                  </Link>
                ))}
              </div>
            ) : (
              <Item variant="muted">
                <ItemContent>
                  <p className="text-sm text-muted-foreground italic">
                    No missions in this campaign yet.
                  </p>
                </ItemContent>
              </Item>
            )}
          </section>
        </div>

        {/* ── Right Sidebar (1/3) ─────────────────────────── */}
        <div className="flex flex-col gap-4">
          {/* Campaign Stats */}
          <Item variant="outline">
            <ItemHeader>
              <div className="flex items-center gap-2">
                <TargetIcon className="size-4 text-muted-foreground" />
                <ItemTitle>Campaign Stats</ItemTitle>
              </div>
            </ItemHeader>
            <ItemContent>
              <div className="flex flex-col gap-2">
                <div className="flex justify-between text-sm">
                  <span className="text-muted-foreground">Total Missions</span>
                  <span className="font-semibold">{missions.length}</span>
                </div>
                {Object.entries(statusCounts).map(([status, count]) => (
                  <div key={status} className="flex justify-between text-sm">
                    <span className="flex items-center gap-1.5">
                      <span
                        className={`size-2 rounded-full ${missionStatusColors[status]?.split(" ")[0] ?? "bg-muted"}`}
                      />
                      <span className="text-muted-foreground">{status}</span>
                    </span>
                    <span className="font-mono">{count}</span>
                  </div>
                ))}
                {campaign.startDate && (
                  <div className="flex justify-between text-sm pt-1 border-t border-border/50">
                    <span className="text-muted-foreground">Duration</span>
                    <span>
                      {startDate}
                      {endDate ? ` — ${endDate}` : " — Present"}
                    </span>
                  </div>
                )}
              </div>
            </ItemContent>
          </Item>

          {/* Faction Roster */}
          {factions.length > 0 && (
            <Item variant="outline">
              <ItemHeader>
                <div className="flex items-center gap-2">
                  <UsersIcon className="size-4 text-muted-foreground" />
                  <ItemTitle>Faction Roster</ItemTitle>
                </div>
                <Link
                  href="/intelligence/factions"
                  className="text-xs text-muted-foreground hover:text-primary transition-colors"
                >
                  View all
                </Link>
              </ItemHeader>
              <ItemContent>
                <div className="flex flex-col gap-2">
                  {factions.map((faction) => (
                    <Link
                      key={faction.id}
                      href="/intelligence/factions"
                      className="flex items-center gap-3 p-1.5 rounded-md hover:bg-muted/50 transition-colors group"
                    >
                      <ShieldIcon className="size-4 text-muted-foreground shrink-0" />
                      <div className="flex flex-col gap-0.5 min-w-0 flex-1">
                        <span className="text-sm font-medium truncate group-hover:text-primary transition-colors">
                          {faction.name}
                        </span>
                        <span
                          className={`text-[10px] font-semibold uppercase tracking-wider px-1 py-0.5 rounded w-fit ${factionTypeColors[faction.type] ?? "bg-muted text-muted-foreground"}`}
                        >
                          {faction.type === "majorFaction"
                            ? "Major"
                            : faction.type === "minorFaction"
                              ? "Minor"
                              : faction.type}
                        </span>
                      </div>
                      <ChevronRightIcon className="size-3 text-muted-foreground opacity-0 group-hover:opacity-100 transition-opacity shrink-0" />
                    </Link>
                  ))}
                </div>
              </ItemContent>
            </Item>
          )}
        </div>
      </div>
    </div>
  );
}