// =============================================================================
// HeadlineSift.com — Sources Page Client Shell
// =============================================================================
"use client";

import { useState, useCallback } from "react";
import { useRouter, useSearchParams } from "next/navigation";
import SourceForm from "./SourceForm";
import SourceTable from "./SourceTable";
import type { SourceRow } from "./SourceTable";

// ============================================================================
// Types
// ============================================================================

interface EditSourceData {
  id: string;
  name: string;
  websiteUrl: string;
  sourceType: string;
  feedUrl: string | null;
  apiUrl: string | null;
  language: string;
  trustScore: number; // 1-10 display scale
  reliabilityScore: number;
  duplicateRate: number;
  clickbaitRate: number;
  isOfficial: boolean;
  status: string;
  fetchFrequencyMinutes: number;
  usageNotes: string | null;
}

interface SourcesPageClientProps {
  sources: SourceRow[];
  searchQuery: string;
  typeFilter: string | null;
  statusFilter: string | null;
  languageFilter: string | null;
  isOfficialFilter: string | null;
  languages: string[];
  editSource: EditSourceData | null;
  successMsg: string | null;
  errorMsg: string | null;
}

// ============================================================================
// Component
// ============================================================================

export function SourcesPageClient({
  sources,
  searchQuery,
  typeFilter,
  statusFilter,
  languageFilter,
  isOfficialFilter,
  languages,
  editSource,
  successMsg,
  errorMsg,
}: SourcesPageClientProps) {
  const router = useRouter();
  const searchParams = useSearchParams();
  const [showAddForm, setShowAddForm] = useState(false);

  // Shared helper: build a new URLSearchParams and push
  const navigate = useCallback(
    (overrides: Record<string, string | null>) => {
      const params = new URLSearchParams(searchParams.toString());
      for (const [key, value] of Object.entries(overrides)) {
        if (value === null) {
          params.delete(key);
        } else {
          params.set(key, value);
        }
      }
      params.delete("success");
      params.delete("error");
      setShowAddForm(false);
      router.push(`/admin/sources?${params.toString()}`, { scroll: false });
    },
    [router, searchParams],
  );

  // Navigate to edit mode (sets ?edit=<id>)
  const handleEdit = useCallback(
    (id: string) => {
      const params = new URLSearchParams(searchParams.toString());
      params.set("edit", id);
      params.delete("success");
      params.delete("error");
      setShowAddForm(false);
      router.push(`/admin/sources?${params.toString()}`);
    },
    [router, searchParams],
  );

  // Show the add form
  const handleAdd = useCallback(() => {
    navigate({ edit: null });
    setShowAddForm(true);
  }, [navigate]);

  // Cancel the form
  const handleCancel = useCallback(() => {
    navigate({ edit: null });
  }, [navigate]);

  const showForm = showAddForm || editSource !== null;

  return (
    <div className="animate-fade-in space-y-6">
      {/* Page Header */}
      <div className="flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between">
        <div>
          <h1 className="text-2xl font-bold">Sources</h1>
          <p className="mt-1 text-sm text-body-muted">
            Manage news sources, their endpoints, trust scores, and health.
          </p>
        </div>
      </div>

      {/* Success Banner */}
      {successMsg && (
        <div
          className="rounded-md bg-green-50 p-3 text-sm text-green-700 ring-1 ring-inset ring-green-200"
          role="alert"
        >
          {successMsg}
        </div>
      )}

      {/* Error Banner (from URL params) */}
      {errorMsg && !successMsg && (
        <div
          className="rounded-md bg-red-50 p-3 text-sm text-red-700 ring-1 ring-inset ring-red-200"
          role="alert"
        >
          {errorMsg}
        </div>
      )}

      {/* Inline Form (Add or Edit) */}
      {showForm && (
        <SourceForm
          editSource={editSource}
          onCancel={handleCancel}
        />
      )}

      {/* Sources Table with Filters */}
      <SourceTable
        sources={sources}
        searchQuery={searchQuery}
        typeFilter={typeFilter}
        statusFilter={statusFilter}
        languageFilter={languageFilter}
        isOfficialFilter={isOfficialFilter}
        languages={languages}
        editingId={editSource?.id ?? null}
        onEdit={handleEdit}
        onAdd={handleAdd}
      />
    </div>
  );
}