<?php

namespace App\Controllers;

use App\Models\ClaimsCollectionV2DashboardModel;
use CodeIgniter\API\ResponseTrait;

/**
 * Claims Collection V2 KPI API (Metabase SQL as model methods).
 */
class ClaimsCollectionV2DashboardController extends BaseController
{
    use ResponseTrait;

    /**
     * Resolve policy id from request; optional $fallback (e.g. route default for debug only).
     */
    protected function resolvePolicyId(?int $fallback = null): int
    {
        $id = (int) (
            $this->request->getGet('client_policy')
            ?? $this->request->getGet('client_policy_id')
            ?? $this->request->getPost('client_policy')
            ?? $this->request->getPost('client_policy_id')
            ?? 0
        );

        if ($id > 0) {
            return $id;
        }

        if ($fallback !== null && $fallback > 0) {
            return $fallback;
        }

        return 0;
    }

    /**
     * Resolve KPI by Metabase numeric id or method slug.
     */
    protected function resolveKpiMethod(string $kpiKey): ?string
    {
        $kpiKey = trim($kpiKey);
        if ($kpiKey === '') {
            return null;
        }

        if (in_array($kpiKey, ClaimsCollectionV2DashboardModel::KPI_MAP, true)) {
            return $kpiKey;
        }

        if (ctype_digit($kpiKey)) {
            $id = (int) $kpiKey;
            return ClaimsCollectionV2DashboardModel::KPI_MAP[$id] ?? null;
        }

        return null;
    }

    /**
     * JSON: single KPI by slug (e.g. incurred_ratio) or Metabase id (e.g. 207).
     * Requires client_policy or client_policy_id.
     */
    public function kpi(string $kpiMethod = '')
    {
        $policyId = $this->resolvePolicyId();

        if ($policyId <= 0) {
            return $this->respond([
                'status'  => false,
                'message' => 'client_policy or client_policy_id is required.',
            ], 422);
        }

        $kpiMethod = $this->resolveKpiMethod($kpiMethod);
        if ($kpiMethod === null) {
            return $this->respond([
                'status'  => false,
                'message' => 'Unknown KPI. Pass Metabase id or method slug.',
                'allowed' => ClaimsCollectionV2DashboardModel::KPI_MAP,
            ], 404);
        }

        $model = new ClaimsCollectionV2DashboardModel();
        $metabaseId = array_search($kpiMethod, ClaimsCollectionV2DashboardModel::KPI_MAP, true);

        return $this->respond([
            'status'      => true,
            'policy_id'   => $policyId,
            'kpi_id'      => $metabaseId !== false ? (int) $metabaseId : null,
            'kpi'         => $kpiMethod,
            'label'       => ClaimsCollectionV2DashboardModel::KPI_LABELS[$kpiMethod] ?? $kpiMethod,
            'rows'        => $model->getKpi($kpiMethod, $policyId),
        ]);
    }

    /**
     * JSON: all KPIs. Requires client_policy or client_policy_id.
     */
    public function all()
    {
        $policyId = $this->resolvePolicyId();

        if ($policyId <= 0) {
            return $this->respond([
                'status'  => false,
                'message' => 'client_policy or client_policy_id is required.',
            ], 422);
        }

        $model = new ClaimsCollectionV2DashboardModel();

        return $this->respond([
            'status'    => true,
            'policy_id' => $policyId,
            'data'      => $model->getAllKpis($policyId),
        ]);
    }

    /**
     * Admin preview UI (authMVC only) — KPI grid for manual testing.
     * Default policy id only in method signature; override via query or /preview/{id}.
     */
    public function preview(int $policyId = 4687)
    {
        $policyId = $this->resolvePolicyId($policyId);
        $path     = $this->request->getUri()->getPath();
        $isJwt    = stripos($path, 'employeeRest') !== false;
        $prefix   = $isJwt ? 'employeeRest/claims-collection-v2' : 'util/claims-collection-v2';

        return view('claims_collection_v2_dashboard', [
            'policy_id'   => $policyId,
            'kpi_map'     => ClaimsCollectionV2DashboardModel::KPI_MAP,
            'kpi_labels'  => ClaimsCollectionV2DashboardModel::KPI_LABELS,
            'api_all_url' => base_url($prefix . '/all'),
            'api_kpi_url' => base_url($prefix . '/kpi'),
        ]);
    }

    /**
     * Admin check only: raw JSON on screen (no dashboard UI).
     * Default policy id only here; override via ?client_policy= or /debug/{id}.
     */
    public function debug(int $policyId = 4687)
    {
        $policyId = $this->resolvePolicyId($policyId);

        if ($policyId <= 0) {
            return $this->response
                ->setStatusCode(422)
                ->setBody('client_policy or client_policy_id is required.');
        }

        $model = new ClaimsCollectionV2DashboardModel();
        $body  = json_encode([
            'status'    => true,
            'policy_id' => $policyId,
            'data'      => $model->getAllKpis($policyId),
        ], JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);

        return $this->response
            ->setHeader('Content-Type', 'application/json; charset=UTF-8')
            ->setBody($body);
    }
}