"use client";

import { Card, CardContent } from "@/components/ui/card";
import { Input } from "@/components/ui/input";
import { Button } from "@/components/ui/button";
import { Badge } from "@/components/ui/badge";
import { Search, Filter, ChevronLeft, ChevronRight } from "lucide-react";
import Link from "next/link";
import { useCallback, useEffect, useMemo, useState } from "react";
import Cookies from "js-cookie";
import { formatDate } from "@/utils/global";
import { listCmsContentSubmissions } from "@/service/cms-content-submissions";
import { getArticlesForMyContent } from "@/service/article";
import { apiPayload } from "@/service/cms-landing";
import { Loader2 } from "lucide-react";
import {
  isApproverOrAdmin,
  isContributorRole,
} from "@/constants/user-roles";

const PLACEHOLDER_IMG =
  "https://placehold.co/400x240/f1f5f9/64748b?text=Content";

type CmsRow = {
  id: string;
  domain: string;
  title: string;
  status: string;
  submitter_name: string;
  submitted_by_id: number;
  created_at: string;
};

type ArticleRow = {
  id: number;
  title: string;
  thumbnailUrl?: string;
  isDraft?: boolean;
  isPublish?: boolean;
  publishStatus?: string;
  statusId?: number | null;
  createdAt?: string;
  created_at?: string;
  createdByName?: string;
};

type UnifiedStatus = "draft" | "pending" | "approved" | "rejected";

type UnifiedItem = {
  key: string;
  source: "website" | "news";
  title: string;
  thumb: string;
  status: UnifiedStatus;
  statusLabel: string;
  date: string;
  href: string;
};

function cmsToUnified(r: CmsRow): UnifiedItem {
  const st = (r.status || "").toLowerCase();
  let status: UnifiedStatus = "pending";
  let statusLabel = "Pending Approval";
  if (st === "approved") {
    status = "approved";
    statusLabel = "Approved";
  } else if (st === "rejected") {
    status = "rejected";
    statusLabel = "Rejected";
  } else if (st === "pending") {
    status = "pending";
    statusLabel = "Pending Approval";
  }
  return {
    key: `cms-${r.id}`,
    source: "website",
    title: r.title,
    thumb: PLACEHOLDER_IMG,
    status,
    statusLabel,
    date: r.created_at,
    href: "/admin/content-website",
  };
}

function articleHistoryStatus(a: ArticleRow): UnifiedStatus {
  if (a.isDraft) return "draft";
  if (a.isPublish) return "approved";
  const ps = (a.publishStatus || "").toLowerCase();
  if (ps.includes("reject")) return "rejected";
  if (a.statusId === 3) return "rejected";
  return "pending";
}

function articleStatusLabel(s: UnifiedStatus): string {
  switch (s) {
    case "draft":
      return "Draft";
    case "pending":
      return "Pending Approval";
    case "approved":
      return "Approved";
    case "rejected":
      return "Rejected";
    default:
      return "Pending Approval";
  }
}

function articleToUnified(r: ArticleRow): UnifiedItem {
  const status = articleHistoryStatus(r);
  const rawDate = r.createdAt ?? r.created_at ?? "";
  return {
    key: `art-${r.id}`,
    source: "news",
    title: r.title || "Untitled",
    thumb: r.thumbnailUrl?.trim() || PLACEHOLDER_IMG,
    status,
    statusLabel: articleStatusLabel(status),
    date: rawDate,
    href: `/admin/news-article/detail/${r.id}`,
  };
}

function statusBadgeClass(status: UnifiedStatus): string {
  switch (status) {
    case "pending":
      return "bg-yellow-100 text-yellow-800 border-yellow-200";
    case "approved":
      return "bg-green-100 text-green-800 border-green-200";
    case "rejected":
      return "bg-red-100 text-red-800 border-red-200";
    case "draft":
    default:
      return "bg-slate-100 text-slate-700 border-slate-200";
  }
}

const PAGE_SIZE = 8;

export default function MyContent() {
  const [levelId, setLevelId] = useState<string | undefined>();
  const [search, setSearch] = useState("");
  const [debouncedSearch, setDebouncedSearch] = useState("");
  const [sourceFilter, setSourceFilter] = useState<"all" | "news" | "website">(
    "all",
  );
  const [statusFilter, setStatusFilter] = useState<
    "all" | UnifiedStatus
  >("all");
  const [loading, setLoading] = useState(true);
  const [cmsRows, setCmsRows] = useState<CmsRow[]>([]);
  const [articleRows, setArticleRows] = useState<ArticleRow[]>([]);
  const [page, setPage] = useState(1);

  const isContributor = isContributorRole(levelId);
  const isApprover = isApproverOrAdmin(levelId);

  useEffect(() => {
    setLevelId(Cookies.get("urie"));
  }, []);

  useEffect(() => {
    const t = setTimeout(() => setDebouncedSearch(search), 350);
    return () => clearTimeout(t);
  }, [search]);

  const load = useCallback(async () => {
    if (levelId === undefined) return;
    setLoading(true);
    try {
      const cmsMine = isContributor;
      const cmsRes = await listCmsContentSubmissions({
        status: "all",
        mine: cmsMine,
        page: 1,
        limit: 500,
      });
      const cmsData = apiPayload<CmsRow[]>(cmsRes);
      setCmsRows(Array.isArray(cmsData) ? cmsData : []);

      const artMode = isApprover ? "approver" : "own";
      const artRes = await getArticlesForMyContent({
        mode: artMode,
        page: 1,
        limit: 500,
      });
      const artData = apiPayload<ArticleRow[]>(artRes);
      setArticleRows(Array.isArray(artData) ? artData : []);
    } finally {
      setLoading(false);
    }
  }, [levelId, isContributor, isApprover]);

  useEffect(() => {
    load();
  }, [load]);

  const mergedAll = useMemo(() => {
    const cms = cmsRows.map(cmsToUnified);
    const arts = articleRows.map(articleToUnified);
    let list = [...cms, ...arts];
    const q = search.trim().toLowerCase();
    if (q) {
      list = list.filter(
        (x) =>
          x.title.toLowerCase().includes(q) ||
          x.statusLabel.toLowerCase().includes(q),
      );
    }
    if (sourceFilter === "news") list = list.filter((x) => x.source === "news");
    if (sourceFilter === "website")
      list = list.filter((x) => x.source === "website");
    if (statusFilter !== "all")
      list = list.filter((x) => x.status === statusFilter);
    list.sort((a, b) => (a.date < b.date ? 1 : -1));
    return list;
  }, [cmsRows, articleRows, debouncedSearch, sourceFilter, statusFilter]);

  const stats = useMemo(() => {
    const draft = mergedAll.filter((x) => x.status === "draft").length;
    const pending = mergedAll.filter((x) => x.status === "pending").length;
    const approved = mergedAll.filter((x) => x.status === "approved").length;
    const rejected = mergedAll.filter((x) => x.status === "rejected").length;
    return {
      total: mergedAll.length,
      draft,
      pending,
      approved,
      rejected,
    };
  }, [mergedAll]);

  const totalPages = Math.max(1, Math.ceil(mergedAll.length / PAGE_SIZE));
  const currentPage = Math.min(page, totalPages);
  const pageItems = useMemo(() => {
    const start = (currentPage - 1) * PAGE_SIZE;
    return mergedAll.slice(start, start + PAGE_SIZE);
  }, [mergedAll, currentPage]);

  useEffect(() => {
    setPage(1);
  }, [sourceFilter, statusFilter, debouncedSearch, levelId]);

  if (levelId === undefined) {
    return (
      <div className="flex min-h-[200px] items-center justify-center">
        <Loader2 className="h-8 w-8 animate-spin text-slate-400" />
      </div>
    );
  }

  return (
    <div className="space-y-8">
      <div>
        <h1 className="text-2xl font-semibold text-slate-900">My Content</h1>
        <p className="text-sm text-muted-foreground mt-1">
          Track all your content submissions and drafts.
        </p>
        <p className="text-xs text-slate-500 mt-2 max-w-3xl">
          {isContributor
            ? "Riwayat konten Anda: perubahan Content Website (setelah diajukan) dan artikel. Buka item untuk mengedit atau melanjutkan persetujuan di halaman masing-masing."
            : isApprover
              ? "Riwayat dari kontributor: Content Website dan News & Articles (tanpa draft). Persetujuan dilakukan di halaman Content Website atau detail artikel."
              : "Ringkasan konten terkait akun Anda."}
        </p>
      </div>

      <div className="grid grid-cols-2 md:grid-cols-3 lg:grid-cols-5 gap-4">
        {[
          { title: "Total Content", value: stats.total, color: "bg-blue-500" },
          { title: "Drafts", value: stats.draft, color: "bg-slate-600" },
          { title: "Pending", value: stats.pending, color: "bg-yellow-500" },
          { title: "Approved", value: stats.approved, color: "bg-green-600" },
          {
            title: "Revision/Rejected",
            value: stats.rejected,
            color: "bg-red-600",
          },
        ].map((item) => (
          <Card key={item.title} className="rounded-2xl shadow-sm">
            <CardContent className="p-5 flex items-center gap-4">
              <div
                className={`w-12 h-12 rounded-xl flex items-center justify-center text-white shrink-0 ${item.color}`}
              />
              <div>
                <p className="text-2xl font-bold text-slate-900">{item.value}</p>
                <p className="text-sm text-muted-foreground">{item.title}</p>
              </div>
            </CardContent>
          </Card>
        ))}
      </div>

      <div className="flex flex-col md:flex-row gap-3 md:items-center md:justify-between">
        <div className="relative w-full md:max-w-md">
          <Search className="absolute left-3 top-3 w-4 h-4 text-muted-foreground" />
          <Input
            placeholder="Search by title…"
            className="pl-9"
            value={search}
            onChange={(e) => setSearch(e.target.value)}
          />
        </div>
        <div className="flex flex-wrap gap-2 items-center">
          <div className="flex items-center gap-2 rounded-lg border bg-white px-3 py-2">
            <Filter className="w-4 h-4 text-muted-foreground" />
            <select
              className="text-sm bg-transparent border-none outline-none"
              value={sourceFilter}
              onChange={(e) =>
                setSourceFilter(e.target.value as typeof sourceFilter)
              }
            >
              <option value="all">All sources</option>
              <option value="news">News & Articles</option>
              <option value="website">Content Website</option>
            </select>
          </div>
          <div className="flex items-center gap-2 rounded-lg border bg-white px-3 py-2">
            <select
              className="text-sm bg-transparent border-none outline-none"
              value={statusFilter}
              onChange={(e) =>
                setStatusFilter(e.target.value as typeof statusFilter)
              }
            >
              <option value="all">All statuses</option>
              <option value="draft">Draft</option>
              <option value="pending">Pending Approval</option>
              <option value="approved">Approved</option>
              <option value="rejected">Rejected</option>
            </select>
          </div>
          <Button
            type="button"
            variant="outline"
            size="sm"
            onClick={() => load()}
            disabled={loading}
          >
            Refresh
          </Button>
        </div>
      </div>

      {loading ? (
        <div className="flex justify-center py-20">
          <Loader2 className="h-10 w-10 animate-spin text-[#966314]" />
        </div>
      ) : pageItems.length === 0 ? (
        <p className="text-center text-slate-500 py-16">No content found.</p>
      ) : (
        <>
          <div className="grid sm:grid-cols-2 lg:grid-cols-4 gap-6">
            {pageItems.map((item) => (
              <Link key={item.key} href={item.href} className="block group">
                <Card className="rounded-2xl border border-slate-200 shadow-sm hover:shadow-md transition-all duration-200 bg-white h-full overflow-hidden">
                  <div className="flex items-center gap-1 flex-wrap px-3 pt-3">
                    <Badge
                      className={`${statusBadgeClass(item.status)} border font-medium`}
                    >
                      {item.statusLabel}
                    </Badge>
                    <Badge
                      variant="outline"
                      className="text-blue-600 border-blue-200 bg-blue-50"
                    >
                      {item.source === "news"
                        ? "News & Articles"
                        : "Content Website"}
                    </Badge>
                  </div>
                  <div className="relative w-full aspect-[4/3] mt-2 bg-slate-100">
                    {/* eslint-disable-next-line @next/next/no-img-element */}
                    <img
                      src={item.thumb}
                      alt=""
                      className="absolute inset-0 w-full h-full object-cover"
                    />
                  </div>
                  <CardContent className="px-4 pb-4 pt-3">
                    <h3 className="text-sm font-semibold leading-snug line-clamp-2 text-slate-900 group-hover:text-blue-700">
                      {item.title}
                    </h3>
                    <p className="text-xs text-slate-500 mt-2">
                      {item.date ? formatDate(item.date) : "—"}
                    </p>
                  </CardContent>
                </Card>
              </Link>
            ))}
          </div>

          <div className="flex flex-col sm:flex-row justify-center items-center gap-3 pt-6">
            <p className="text-sm text-slate-500">
              Showing {(currentPage - 1) * PAGE_SIZE + 1} to{" "}
              {Math.min(currentPage * PAGE_SIZE, mergedAll.length)} of{" "}
              {mergedAll.length} items
            </p>
            <div className="flex items-center gap-2">
              <Button
                type="button"
                variant="outline"
                size="sm"
                disabled={currentPage <= 1}
                onClick={() => setPage((p) => Math.max(1, p - 1))}
              >
                <ChevronLeft className="w-4 h-4" />
                Previous
              </Button>
              <span className="text-sm text-slate-600 px-2">
                Page {currentPage} / {totalPages}
              </span>
              <Button
                type="button"
                variant="outline"
                size="sm"
                disabled={currentPage >= totalPages}
                onClick={() => setPage((p) => Math.min(totalPages, p + 1))}
              >
                Next
                <ChevronRight className="w-4 h-4" />
              </Button>
            </div>
          </div>
        </>
      )}
    </div>
  );
}