/**
 * HomeView Component
 * Client-side home page view with search and filtering
 */

'use client';

import { useState } from 'react';
import { useSearchParams } from 'next/navigation';
import { FilterBar } from './FilterBar';
import { SchoolCard } from './SchoolCard';
import { SchoolMap } from './SchoolMap';
import { Pagination } from './Pagination';
import { EmptyState } from './EmptyState';
import { useComparisonContext } from '@/context/ComparisonContext';
import type { SchoolsResponse, Filters, School } from '@/lib/types';
import styles from './HomeView.module.css';

interface HomeViewProps {
  initialSchools: SchoolsResponse;
  filters: Filters;
}

export function HomeView({ initialSchools, filters }: HomeViewProps) {
  const searchParams = useSearchParams();
  const { addSchool, selectedSchools } = useComparisonContext();
  const [resultsView, setResultsView] = useState<'list' | 'map'>('list');

  const hasSearch = searchParams.get('search') || searchParams.get('postcode');
  const isLocationSearch = !!searchParams.get('postcode');

  return (
    <div className={styles.homeView}>
      {/* Combined Hero + Search and Filters */}
      <FilterBar
        filters={filters}
        showLocationSearch
        heroTitle="Compare Primary School Performance"
        heroDescription="Search and compare KS2 results for thousands of schools across England"
      />

      {/* Location Info Banner with View Toggle */}
      {isLocationSearch && initialSchools.location_info && (
        <div className={styles.locationBannerWrapper}>
          <div className={styles.locationBanner}>
            <span>
              Showing schools within {(initialSchools.location_info.radius / 1.60934).toFixed(1)} miles of{' '}
              <strong>{initialSchools.location_info.postcode}</strong>
            </span>
          </div>
          {initialSchools.schools.length > 0 && (
            <div className={styles.viewToggle}>
              <button
                className={`${styles.viewToggleBtn} ${resultsView === 'list' ? styles.active : ''}`}
                onClick={() => setResultsView('list')}
              >
                <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" width="16" height="16">
                  <line x1="8" y1="6" x2="21" y2="6"/>
                  <line x1="8" y1="12" x2="21" y2="12"/>
                  <line x1="8" y1="18" x2="21" y2="18"/>
                  <line x1="3" y1="6" x2="3.01" y2="6"/>
                  <line x1="3" y1="12" x2="3.01" y2="12"/>
                  <line x1="3" y1="18" x2="3.01" y2="18"/>
                </svg>
                List
              </button>
              <button
                className={`${styles.viewToggleBtn} ${resultsView === 'map' ? styles.active : ''}`}
                onClick={() => setResultsView('map')}
              >
                <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" width="16" height="16">
                  <path d="M21 10c0 7-9 13-9 13s-9-6-9-13a9 9 0 0 1 18 0z"/>
                  <circle cx="12" cy="10" r="3"/>
                </svg>
                Map
              </button>
            </div>
          )}
        </div>
      )}

      {/* Results Section */}
      <section className={`${styles.results} ${resultsView === 'map' && isLocationSearch ? styles.mapViewResults : ''}`}>
        {!hasSearch && initialSchools.schools.length > 0 && (
          <div className={styles.sectionHeader}>
            <h2>Featured Schools</h2>
            <p className={styles.sectionDescription}>
              Explore schools from across England
            </p>
          </div>
        )}

        {hasSearch && resultsView === 'list' && (
          <div className={styles.resultsHeader}>
            <h2>
              {initialSchools.total.toLocaleString()} school
              {initialSchools.total !== 1 ? 's' : ''} found
            </h2>
          </div>
        )}

        {initialSchools.schools.length === 0 ? (
          <EmptyState
            title={hasSearch ? "No schools found" : "Search for Schools"}
            message={
              hasSearch
                ? "Try adjusting your search criteria or filters to find schools."
                : "Use the search above to find schools by name or search by location to discover schools near a postcode."
            }
            action={
              hasSearch
                ? {
                    label: 'Clear Filters',
                    onClick: () => {
                      window.location.href = '/';
                    },
                  }
                : undefined
            }
          />
        ) : resultsView === 'map' && isLocationSearch ? (
          /* Map View Layout */
          <div className={styles.mapViewContainer}>
            <div className={styles.mapContainer}>
              <SchoolMap
                schools={initialSchools.schools}
                center={initialSchools.location_info?.coordinates}
              />
            </div>
            <div className={styles.compactList}>
              {initialSchools.schools.map((school) => (
                <CompactSchoolItem
                  key={school.urn}
                  school={school}
                  onAddToCompare={addSchool}
                  isInCompare={selectedSchools.some(s => s.urn === school.urn)}
                />
              ))}
            </div>
          </div>
        ) : (
          /* List View Layout */
          <>
            <div className={styles.grid}>
              {initialSchools.schools.map((school) => (
                <SchoolCard
                  key={school.urn}
                  school={school}
                  onAddToCompare={addSchool}
                />
              ))}
            </div>

            {initialSchools.total_pages > 1 && (
              <Pagination
                currentPage={initialSchools.page}
                totalPages={initialSchools.total_pages}
                total={initialSchools.total}
              />
            )}
          </>
        )}
      </section>
    </div>
  );
}

/* Compact School Item for Map View */
interface CompactSchoolItemProps {
  school: School;
  onAddToCompare: (school: School) => void;
  isInCompare: boolean;
}

function CompactSchoolItem({ school, onAddToCompare, isInCompare }: CompactSchoolItemProps) {
  return (
    <div className={styles.compactItem}>
      <div className={styles.compactItemContent}>
        <div className={styles.compactItemHeader}>
          <a href={`/school/${school.urn}`} className={styles.compactItemName}>
            {school.school_name}
          </a>
          {school.distance !== undefined && school.distance !== null && (
            <span className={styles.distanceBadge}>
              {school.distance.toFixed(1)} mi
            </span>
          )}
        </div>
        <div className={styles.compactItemMeta}>
          {school.school_type && <span>{school.school_type}</span>}
          {school.local_authority && <span>{school.local_authority}</span>}
        </div>
        <div className={styles.compactItemStats}>
          <span className={styles.compactStat}>
            <strong>{school.rwm_expected_pct !== null ? `${school.rwm_expected_pct}%` : '-'}</strong> RWM
          </span>
          <span className={styles.compactStat}>
            <strong>{school.total_pupils || '-'}</strong> pupils
          </span>
        </div>
      </div>
      <div className={styles.compactItemActions}>
        <button
          className={`${styles.compactBtn} ${isInCompare ? styles.compactBtnActive : ''}`}
          onClick={() => onAddToCompare(school)}
        >
          {isInCompare ? 'Remove' : 'Compare'}
        </button>
        <a href={`/school/${school.urn}`} className={styles.compactBtnSecondary}>
          Details
        </a>
      </div>
    </div>
  );
}