<?php

class PreorderIFrameModel extends mfBaseModel
{
    public function init()
    {
        $this->table = 'Preorder';
    }

    public function getClusters($frame_referrer): array
    {
        $query = "
        SELECT 
            n.adb_netzgebiet_id as id, 
            ng.name, 
            GROUP_CONCAT(pc.id SEPARATOR ', ') as campaign_ids, 
            GROUP_CONCAT(pc.name SEPARATOR ', ') as campaign_names
        FROM thetool.Preordercampaign pc
        JOIN thetool.Network n ON pc.Network_id = n.id
        JOIN addressdb.Netzgebiet ng ON n.adb_netzgebiet_id = ng.id
        WHERE JSON_SEARCH(pc.iframe_origins, 'one', '" . $this->db->escape($frame_referrer) . "') IS NOT NULL
        GROUP BY n.adb_netzgebiet_id, ng.name
        ORDER BY ng.name ASC
    ";

        $res = $this->db->query($query);
        $clusters = $this->db->fetch_all_assoc($res);

        if (empty($clusters)) {
            // Fallback for development or specific cases
            return [['id' => 98, 'name' => 'Leibnitz', 'campaign_id' => 99, 'campaign_name' => 'X - Leibnitz']];
        }

        return $clusters;
    }

    public function findCities(array $params): array
    {
        if (empty($params['gemeindeId']) && empty($params['clusterId'])) return [];

        $sql = "SELECT DISTINCT o.name FROM addressdb.Plz p
                JOIN addressdb.Ortschaft o ON p.gemeinde_id = o.gemeinde_id
                JOIN addressdb.Gemeinde g ON o.gemeinde_id = g.id
                LEFT JOIN addressdb.GemeindeNetzgebiet gn ON g.id = gn.gemeinde_id
                WHERE p.plzstring = " . $this->db->escape($params['zip']);

        $cond = !empty($params['gemeindeId'])
            ? " AND g.id = " . intval($params['gemeindeId'])
            : " AND gn.netzgebiet_id = " . intval($params['clusterId']);

        $rows = $this->db->fetch_all_assoc($this->db->query($sql . $cond));

        if (empty($rows) && empty($params['gemeindeId']))
            $rows = $this->db->fetch_all_assoc($this->db->query($sql));

        return array_column($rows, 'name');
    }

    public function findStreets(array $params): array
    {
        if (empty($params['gemeindeId']) && empty($params['clusterId'])) return [];

        $sql = "SELECT DISTINCT s.name
                FROM addressdb.Strasse s
                JOIN addressdb.Gemeinde g ON s.gemeinde_id = g.id
                JOIN addressdb.Ortschaft o ON o.gemeinde_id = g.id
                LEFT JOIN addressdb.GemeindeNetzgebiet gn ON g.id = gn.gemeinde_id
                WHERE o.name = '" . $this->db->escape($params['city']) . "'
                AND EXISTS (SELECT 1 FROM addressdb.Plz p WHERE p.plzstring = " . $this->db->escape($params['zip']) . " AND p.gemeinde_id = o.gemeinde_id)";

        $cond = !empty($params['gemeindeId'])
            ? " AND g.id = " . intval($params['gemeindeId'])
            : " AND gn.netzgebiet_id = " . intval($params['clusterId']);

        $rows = $this->db->fetch_all_assoc($this->db->query($sql . $cond));

        // Fallback: If empty result and we were using clusterId, run without the specific ID constraint
        if (empty($rows) && empty($params['gemeindeId']))
            $rows = $this->db->fetch_all_assoc($this->db->query($sql));

        return array_column($rows, 'name');
    }
    
    public function findAddresses(array $params): array
    {
        $whereClauses = [
            "p.plzstring = " . $this->db->escape($params['zip']),
            "o.name = '" . $this->db->escape($params['city']) . "'",
            "s.name = '" . $this->db->escape($params['street']) . "'",
            "h.hausnummer = '" . $this->db->escape($params['housenumber']) . "'",
        ];

        if (!empty($params['gemeinde_id'])) {
            $whereClauses[] = "h.gemeinde_id = " . intval($params['gemeinde_id']);
        } elseif (!empty($params['cluster_id'])) {
            $whereClauses[] = "h.netzgebiet_id = " . intval($params['cluster_id']);
        } else {
            return [];
        }

        $whereString = implode(" AND ", $whereClauses);

        $query = "
            SELECT h.oaid, h.hausnummer, s.name as street, p.plzstring as zip, o.name as city, h.id as hausnummer_id, w.id as wohneinheit_id,
                   h.stiege, h.unit_count as building_unit_count, h.tool_building_type as building_type,
                   w.oaid as unit_oaid, w.stock, w.tuer, w.zusatz
            FROM addressdb.Hausnummer h
            JOIN addressdb.Strasse s ON h.strasse_id = s.id
            JOIN addressdb.Plz p ON h.plz_id = p.id
            JOIN addressdb.Ortschaft o ON s.gemeinde_id = o.gemeinde_id
            LEFT JOIN addressdb.Wohneinheit w ON w.hausnummer_id = h.id
            WHERE $whereString
        ";

        $results = $this->db->fetch_all_assoc($this->db->query($query));
        if (empty($results)) return [];

        $orderType = $params['orderType'] ?? 'order';

        // For 'interest' order type, return a single entry for the whole building.
        if ($orderType === 'interest') {
            $representativeAddress = $this->formatAddressRow($results[0]);
            $representativeAddress['wohneinheit_id'] = null; // Critical: No specific unit
            $representativeAddress['oaid'] = $results[0]['oaid']; // Use building OAID
            $representativeAddress['showText'] = "Gesamtes Gebäude";
            $representativeAddress['preorderTypes'] = ['interest'];
            return [$representativeAddress]; // Return one item, so frontend proceeds directly.
        }

        // Original logic for 'order' type
        $addresses = [];
        $topCounter = 1;

        if (count($results) > 1 && $results[0]['wohneinheit_id'] !== null) {
            foreach ($results as $row) {
                $address = $this->formatAddressRow($row);
                $address['showText'] = $this->buildShowText($row, $topCounter++);
                $address['preorderTypes'] = ['order'];
                $addresses[] = $address;
            }
        } else {
            // Single unit or building without units
            $address = $this->formatAddressRow($results[0]);
            $address['preorderTypes'] = ['order'];
            $addresses[] = $address;
        }

        return $addresses;
    }

    private function formatAddressRow(array $row): array
    {
        return [
            'oaid' => $row['unit_oaid'] ?? $row['oaid'],
            'street' => $row['street'],
            'housenumber' => $row['hausnummer'],
            'hausnummer_id' => $row['hausnummer_id'],
            'wohneinheit_id' => $row['wohneinheit_id'],
            'building_type' => intval($row['building_type']),
            'zip' => $row['zip'],
            'city' => $row['city'],
            'stiege' => $row['stiege'],
            'stock' => $row['stock'],
            'tuer' => $row['tuer'],
            'zusatz' => $row['zusatz'],
            'building_unit_count' => $row['building_unit_count'],
            'showText' => $this->buildShowText($row, 1),
        ];
    }

    private function buildShowText(array $row, int $counter): string
    {
        $parts = array_filter([
            $row['stiege'] ? "Stiege {$row['stiege']}" : null,
            $row['stock'] ? "Stock {$row['stock']}" : null,
            $row['tuer'] ? "Tür {$row['tuer']}" : null,
            $row['zusatz'] ?: null
        ]);

        return $parts ? implode(', ', $parts) : "Top {$counter}";
    }
}