<?php

namespace App\Controllers\Api;

use App\Controllers\BaseController;
use App\Models\DictControlModel;
use App\Models\ControlTestModel;
use App\Models\DailyResultModel;
use App\Models\ResultModel;
use App\Models\ResultCommentModel;

class EntryApiController extends BaseController
{
    protected $dictControlModel;
    protected $controlTestModel;
    protected $dailyResultModel;
    protected $resultModel;
    protected $commentModel;

    public function __construct()
    {
        $this->dictControlModel = new \App\Models\DictControlModel();
        $this->controlTestModel = new \App\Models\ControlTestModel();
        $this->dailyResultModel = new \App\Models\DailyResultModel();
        $this->resultModel = new \App\Models\ResultModel();
        $this->commentModel = new \App\Models\ResultCommentModel();
    }

    public function getControls()
    {
        try {
            $date = $this->request->getGet('date');
            $deptId = $this->request->getGet('deptId');

            $rows = $this->dictControlModel->getActiveByDate($date, $deptId);
            return $this->respond([
                'status' => 'success',
                'message' => 'fetch success',
                'data' => $rows
            ], 200);
        } catch (\Exception $e) {
            return $this->failServerError('Something went wrong: ' . $e->getMessage());
        }
    }

    public function getTests()
    {
        try {
            $controlId = $this->request->getGet('controlId');

            $rows = $this->controlTestModel->getByControl($controlId);
            return $this->respond([
                'status' => 'success',
                'message' => 'fetch success',
                'data' => $rows
            ], 200);
        } catch (\Exception $e) {
            return $this->failServerError('Something went wrong: ' . $e->getMessage());
        }
    }

    public function saveDaily()
    {
        $input = $this->request->getJSON(true);
        
        try {
            $resultData = [
                'control_ref_id' => $input['controlId'] ?? 0,
                'test_ref_id' => $input['testId'] ?? 0,
                'resdate' => $input['resdate'] ?? date('Y-m-d'),
                'resvalue' => $input['resvalue'] ?? '',
                'rescomment' => $input['rescomment'] ?? '',
            ];

            $this->dailyResultModel->saveResult($resultData);
            return $this->respond([
                'status' => 'success',
                'message' => 'save success'
            ]);
        } catch (\Exception $e) {
            return $this->failServerError('Something went wrong: ' . $e->getMessage());
        }
    }

    public function saveMonthly()
    {
        $input = $this->request->getJSON(true);
        
        try {
            $controlId = $input['controlId'] ?? 0;
            $yearMonth = $input['yearMonth'] ?? '';
            $operation = $input['operation'] ?? 'replace';
            $tests = $input['tests'] ?? [];
            $results = [];
            $statistics = [];
            $validations = [];

            foreach ($tests as $testData) {
                $testId = $testData['testId'] ?? 0;
                $resvalues = $testData['resvalue'] ?? [];
                $rescomments = $testData['rescomment'] ?? [];

                $controlTest = $this->controlTestModel->getByControlAndTest($controlId, $testId);
                $mean = $controlTest['mean'] ?? 0;
                $sd = $controlTest['sd'] ?? 0;
                $sdLimit = $sd > 0 ? $sd * 2 : 0;

                $testValues = [];
                $validCount = 0;
                $validSum = 0;
                $validSqSum = 0;

                foreach ($resvalues as $day => $value) {
                    if (!empty($value)) {
                        $resdate = $yearMonth . '-' . str_pad($day, 2, '0', STR_PAD_LEFT);
                        $rescomment = $rescomments[$day] ?? '';

                        $resultData = [
                            'control_ref_id' => $controlId,
                            'test_ref_id' => $testId,
                            'resdate' => $resdate,
                            'resvalue' => $value,
                            'rescomment' => $rescomment,
                        ];

                        if ($operation === 'replace') {
                            $this->resultModel->saveResult($resultData);
                        } else {
                            $existing = $this->resultModel->checkExisting($controlId, $testId, $resultData['resdate']);
                            if (!$existing) {
                                $this->resultModel->saveResult($resultData);
                            }
                        }

                        $numValue = (float) $value;
                        $testValues[] = $numValue;
                        $validCount++;
                        $validSum += $numValue;
                        $validSqSum += $numValue * $numValue;

                        $withinLimit = true;
                        if ($sdLimit > 0) {
                            $withinLimit = abs($numValue - $mean) <= $sdLimit;
                        }

                        if (!$withinLimit) {
                            $validations[] = [
                                'testId' => $testId,
                                'day' => $day,
                                'value' => $value,
                                'mean' => $mean,
                                'sd' => $sd,
                                'status' => 'out_of_range'
                            ];
                        }
                    }
                }

                if ($validCount > 0) {
                    $calcMean = $validSum / $validCount;
                    $calcSd = 0;
                    if ($validCount > 1) {
                        $variance = ($validSqSum - ($validSum * $validSum) / $validCount) / ($validCount - 1);
                        $calcSd = $variance > 0 ? sqrt($variance) : 0;
                    }
                    $cv = $calcMean > 0 ? ($calcSd / $calcMean) * 100 : 0;

                    $statistics[] = [
                        'testId' => $testId,
                        'n' => $validCount,
                        'mean' => round($calcMean, 3),
                        'sd' => round($calcSd, 3),
                        'cv' => round($cv, 2)
                    ];
                }

                $results[] = [
                    'testId' => $testId,
                    'saved' => count($resvalues)
                ];
            }

            return $this->respond([
                'status' => 'success',
                'message' => 'save success',
                'data' => [
                    'results' => $results,
                    'statistics' => $statistics,
                    'validations' => $validations
                ]
            ]);
        } catch (\Exception $e) {
            return $this->failServerError('Something went wrong: ' . $e->getMessage());
        }
    }

    public function saveComment()
    {
        $input = $this->request->getJSON(true);
        
        try {
            $commentData = [
                'control_ref_id' => $input['controlId'] ?? 0,
                'test_ref_id' => $input['testId'] ?? 0,
                'commonth' => $input['commonth'] ?? '',
                'comtext' => $input['comtext'] ?? '',
            ];

            $this->commentModel->saveComment($commentData);
            return $this->respond([
                'status' => 'success',
                'message' => 'save success'
            ]);
        } catch (\Exception $e) {
            return $this->failServerError('Something went wrong: ' . $e->getMessage());
        }
    }

    public function getMonthlyData()
    {
        $controlId = $this->request->getGet('controlId');
        $testId = $this->request->getGet('testId');
        $yearMonth = $this->request->getGet('yearMonth');

        try {
            $results = $this->resultModel->getByMonth($controlId, $testId, $yearMonth);
            $comment = $this->commentModel->getByControlTestMonth($controlId, $testId, $yearMonth);

            $formValues = [];
            $comments = [];
            foreach ($results as $row) {
                $day = (int)date('j', strtotime($row['resdate']));
                $formValues[$day] = $row['resvalue'];
                if (!empty($row['rescomment'])) {
                    $comments[$day] = $row['rescomment'];
                }
            }

            return $this->respond([
                'status' => 'success',
                'message' => 'fetch success',
                'data' => [
                    'formValues' => $formValues,
                    'comments' => $comments,
                    'comment' => $comment ? $comment['comtext'] : ''
                ]
            ], 200);
        } catch (\Exception $e) {
            return $this->failServerError('Something went wrong: ' . $e->getMessage());
        }
    }
}