<?php
namespace App\Controllers;

use CodeIgniter\API\ResponseTrait;
use CodeIgniter\Controller;
use CodeIgniter\Database\RawSql;

class ValueSet extends Controller {
    use ResponseTrait;

    public function __construct() {
        $this->db = \Config\Database::connect();
        $this->now = date('Y-m-d H:i:s');
        $this->rules = [
            'VSet' => 'required',
            'VValue' => 'required',
        ];
    }

    public function index() {
        $rows = $this->db->table('codedtxt')
            ->select("*")
            ->get()->getResultArray();
        
        if (empty($rows)) {
            return $this->respond([
                'status'  => 'success',
                'message' => "no Data.",
                'data'    => [],
            ], 200);
        }

        return $this->respond([
            'status' => 'success',
            'message'=> "Value Set fetched successfully",
            'data'   => $rows,
        ], 200);
    }

    public function show($VID = null) {
        $rows = $this->db->table('valueset')
            ->select("*")
            ->where('VID', (int) $VID)
            ->get()->getResultArray();
        
        if (empty($rows)) {
            return $this->respond([
                'status'  => 'success',
                'message' => "ValueSet with ID $VID not found.",
                'data'    => [],
            ], 200);
        }

        return $this->respond([
            'status' => 'success',
            'message'=> "Data fetched successfully",
            'data'   => $rows,
        ], 200);
    }

    public function create() {
        try {
            $input = $this->request->getJSON(true);
            $now   = date('Y-m-d H:i:s');

            // Prepare data
            $data = $this->prepareData($input, $now, 'create');

            if (!$this->validateData($data, $this->rules)) {
                return $this->failValidationErrors($this->validator->getErrors());
            }

            // Start transaction
            $this->db->transStart();

            // Insert 
            $this->db->table('valueset')->insert($data);

            // Complete transaction
            $this->db->transComplete();

            if ($this->db->transStatus() === false) {
                $dbError = $this->db->error();
                return $this->failServerError(
                    'Failed to create data (transaction rolled back): ' . ($dbError['message'] ?? 'Unknown database error')
                );
            }

            return $this->respondCreated([
                'status'  => 'success',
                'message' => 'Data created successfully',
                'data'    => $data,
            ], 201);

        } catch (\Throwable $e) {
            // Ensure rollback if something goes wrong
            if ($this->db->transStatus() !== false) {
                $this->db->transRollback();
            }
            return $this->failServerError('Something went wrong: ' . $e->getMessage());
        }
    }

    public function update($VID = null) {
        try {
            $input = $this->request->getJSON(true);
            $now   = $this->now;

            $data = $this->prepareData($input, $now, 'update');

            if (!$this->validateData($data, $this->rules)) {
                return $this->failValidationErrors( $this->validator->getErrors() );
            }

            // Start transaction
            $this->db->transStart();

            // Insert location
            $this->db->table('valueset')->where('VID', $VID)->update($data);

            // Complete transaction
            $this->db->transComplete();

            if ($this->db->transStatus() === false) {
                $dbError = $this->db->error();
                return $this->failServerError(
                    'Failed to update data (transaction rolled back): ' . ($dbError['message'] ?? 'Unknown database error')
                );
            }

            return $this->respondCreated([
                'status'  => 'success',
                'message' => 'Data updated successfully',
                'data'    => $data,
            ], 201);

        } catch (\Throwable $e) {
            // Ensure rollback if something goes wrong
            if ($this->db->transStatus() !== false) {
                $this->db->transRollback();
            }
            return $this->failServerError('Something went wrong: ' . $e->getMessage());
        }
    }

    public function delete($VID = null) {
        try {        
            if (!$VID) {
                return $this->failValidationErrors('VID is required.');
            }

            $valueset = $this->db->table('valuset')->where('VID', $VID)->get()->getRow();
            if (!$valueset) {
                return $this->failNotFound("VID with {$VID} not found.");
            }

            $this->db->table('codedtxt')->where('VID', $VID)->update(['EndDate' => $this->now ]);

            return $this->respondDeleted([
                'status' => 'success',
                'message' => "Data with ID {$VID} deleted successfully."
            ]);
 
        } catch (\Throwable $e) {
            // Ensure rollback if something goes wrong
            if ($this->db->transStatus() !== false) {
                $this->db->transRollback();
            }
            return $this->failServerError('Something went wrong: ' . $e->getMessage());
        }
    }

    private function prepareData(array $input, string $now, string $mode = 'create'): array {
        $data = [
            "VSet" => $input['VSet'] ?? null,
            "VOrder" => $input['VOrder'] ?? null,
            "VValue" => $input['VValue'] ?? null,
            "VDesc" => $input['VDesc'] ?? null,
            "VCategory" => $input['VCategory'] ?? null
        ];

        if ($mode === 'create') {
            $data["CreateDate"] = $now;
        }

        return $data;
    }
}