<?php
// api/controllers/DashboardController.php
class DashboardController {
    public function index(): void {
        requireAuth([ROLE_ADMIN, ROLE_PENGURUS, ROLE_PIMPINAN]);
        $db = getDB();

        // Ringkasan utama
        $stat = $db->query(
            "SELECT
               (SELECT COUNT(*) FROM penduduk WHERE status_hidup='hidup') AS total_penduduk,
               (SELECT COUNT(*) FROM penduduk WHERE status_hidup='hidup' AND status_ekonomi='miskin') AS total_miskin,
               (SELECT COUNT(*) FROM penduduk WHERE status_hidup='hidup' AND status_ekonomi='rentan') AS total_rentan,
               (SELECT COUNT(*) FROM penduduk WHERE status_hidup='hidup' AND status_ekonomi='mampu') AS total_mampu,
               (SELECT COUNT(*) FROM keluarga) AS total_kk,
               (SELECT COUNT(*) FROM rumah_ibadah WHERE aktif=1) AS total_ri,
               (SELECT COUNT(*) FROM laporan WHERE status='pending') AS laporan_pending,
               (SELECT COUNT(*) FROM laporan WHERE urgensi='darurat' AND status NOT IN('selesai')) AS laporan_darurat,
               (SELECT COUNT(DISTINCT nik) FROM histori_bantuan WHERE status_penyaluran='disalurkan') AS sudah_dibantu,
               (SELECT COUNT(*) FROM histori_bantuan WHERE MONTH(tanggal)=MONTH(CURDATE()) AND YEAR(tanggal)=YEAR(CURDATE())) AS bantuan_bulan_ini"
        )->fetch();

        // Sebaran per kecamatan
        $kec = $db->query(
            "SELECT k.kecamatan,
                    COUNT(DISTINCT k.id) AS jumlah_kk,
                    SUM(CASE WHEN k.status_ekonomi='miskin' THEN 1 ELSE 0 END) AS miskin,
                    SUM(CASE WHEN k.status_ekonomi='rentan' THEN 1 ELSE 0 END) AS rentan
             FROM keluarga k GROUP BY k.kecamatan ORDER BY miskin DESC"
        )->fetchAll();

        // Trend bantuan 6 bulan
        $trend = $db->query(
            "SELECT DATE_FORMAT(tanggal,'%Y-%m') AS bulan, COUNT(*) AS jumlah
             FROM histori_bantuan
             WHERE tanggal >= DATE_SUB(CURDATE(), INTERVAL 6 MONTH)
             GROUP BY bulan ORDER BY bulan"
        )->fetchAll();

        // Belum pernah dibantu (miskin)
        $belum = $db->query(
            "SELECT COUNT(*) AS c FROM penduduk p
             WHERE p.status_ekonomi IN ('miskin','rentan')
               AND p.status_hidup='hidup'
               AND NOT EXISTS (SELECT 1 FROM histori_bantuan hb WHERE hb.nik=p.nik AND hb.status_penyaluran='disalurkan')"
        )->fetch()['c'];

        // Prioritas darurat
        $prioritas = $db->query(
            "SELECT * FROM v_prioritas_bantuan
             WHERE level_prioritas IN ('SANGAT TINGGI','TINGGI')
             LIMIT 10"
        )->fetchAll();

        // Beban per RI
        $bebanRI = $db->query(
            "SELECT ri.nama, ri.jenis,
                    COUNT(DISTINCT k.id) AS jumlah_kk,
                    SUM(CASE WHEN k.status_ekonomi='miskin' THEN 1 ELSE 0 END) AS kk_miskin
             FROM rumah_ibadah ri
             LEFT JOIN keluarga k ON k.id_rumah_ibadah=ri.id
             WHERE ri.aktif=1
             GROUP BY ri.id ORDER BY kk_miskin DESC"
        )->fetchAll();

        jsonSuccess([
            'statistik'       => $stat,
            'sebaran_kecamatan' => $kec,
            'trend_bantuan'   => $trend,
            'belum_dibantu'   => (int)$belum,
            'prioritas_darurat' => $prioritas,
            'beban_per_ri'    => $bebanRI,
        ]);
    }

    public function show(string $id): void { jsonError('Not implemented', 501); }
    public function store(): void { jsonError('Not implemented', 501); }
    public function update(string $id): void { jsonError('Not implemented', 501); }
    public function destroy(string $id): void { jsonError('Not implemented', 501); }
}