<?php
namespace App\Controllers;

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

class Contact extends Controller {
    use ResponseTrait;

    public function __construct() {
        $this->db = \Config\Database::connect();
        $this->rulesContact = [
            'NameFirst' => 'required'
        ];
    }

    public function index() {
        $sql = $this->db->table('contact c')
            ->select("c.ContactID, cd.ContactCode, c.NameFirst, c.NameLast, c.Specialty")
            ->join("contactdetail cd", "c.ContactID=cd.ContactID", "left") 
            ->join("occupation o","cd.OccupationID=o.OccupationID", "left");
        $rows = $sql->get()->getResultArray();
        
        if (empty($rows)) {
            return $this->respond([
                'status'  => 'success',
                'message' => "no Data.",
                'data'    => $rows,
            ], 200);
        }

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

    public function show($ContactID = null) {
        $rows=$this->db->table('contact c')
            ->select("*")
            ->join("contactdetail cd", "c.ContactID=cd.ContactID", "left") 
            ->join("occupation o","o.OccupationID=cd.OccupationID", "left")
            ->where('c.ContactID', (int) $ContactID)
            ->get()->getResultArray();
        
        if (empty($rows)) {
            return $this->respond([
                'status'  => 'success',
                'message' => "Data not found.",
                'data'    => [],
            ], 200);
        }

        // Rebuild into nested structure
        $contact = [
            'ContactID' => $rows[0]['ContactID'],
            'NameFirst' => $rows[0]['NameFirst'] ?? null,
            'NameLast' => $rows[0]['NameLast'] ?? null,
            'Title' => $rows[0]['Title'] ?? null,
            'Initial' => $rows[0]['Initial'] ?? null,
            'Birthdate' => $rows[0]['Birthdate'] ?? null,
            'EmailAddress1' => $rows[0]['EmailAddress1'] ?? null,
            'EmailAddress2' => $rows[0]['EmailAddress2'] ?? null,
            'Phone' => $rows[0]['Phone'] ?? null,
            'MobilePhone1' => $rows[0]['MobilePhone1'] ?? null,
            'MobilePhone2' => $rows[0]['MobilePhone2'] ?? null,
            'Specialty' => $rows[0]['Specialty'] ?? null,
            'SubSpecialty' => $rows[0]['SubSpecialty'] ?? null,
            'Details'     => []
        ];

        foreach ($rows as $row) {
            if (!empty($row['ContactDetID'])) {
                $contact['Details'][] = [
                    'ContactDetID' => $row['ContactDetID'],
                    'ContactCode' => $row['ContactCode'] ?? null,
                    'ContactEmail' => $row['DetailPhone'] ?? null,
                    'OccupationID' => $row['OccupationID'] ?? null,
                    'JobTitle'  => $row['JobTitle'] ?? null,
                    'Department'  => $row['Department'] ?? null,
                    'ContactStartDate' => $row['ContactStartDate'] ?? null,
                    'ContactEndDate' => $row['ContactEndDate'] ?? null
                ];
            }
        }

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

    public function create() {
        try {
            $input = $this->request->getJSON(true);

            // Prepare data
            $dataContact = $this->prepareContactData($input);
            $dataContactDetail = $this->prepareContactDetailData($input);

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

            // Start transaction
            $this->db->transStart();
            $this->db->table('contact')->insert($dataContact);
            $newContactID = $this->db->insertID();

            
            if (!empty($dataContactDetail)) {
                $dataContactDetail['ContactID'] = $newContactID;
                $this->db->table('contactdetail')->insert($dataContactDetail);
            }

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

            return $this->respondCreated([
                'status'  => 'success',
                'message' => 'Contact created successfully',
                'data'    => $dataContact,
            ], 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() {
        try {
            $input = $this->request->getJSON(true);

            // Prepare data
            $dataContact = $this->prepareContactData($input);
            $dataContactDetail = $this->prepareContactDetailData($input);

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

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

            $this->db->table('contact')->where('ContactID', $dataContact["ContactID"])->update($dataContact);

            // Insert address if available
            if (!empty($dataContactDetail)) {
                $dataContactDetail['ContactID'] = $input["ContactID"];
                $this->db->table('contactdetail')->upsert($dataContactDetail);
            }

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

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

            return $this->respondCreated([
                'status'  => 'success',
                'message' => 'Contact updated successfully',
                'data'    => $dataContact,
            ], 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() {
        try {
            $input = $this->request->getJSON(true);
            $ContactID = $input["ContactID"];
            if (!$ContactID) {
                return $this->failValidationError('ContactID is required.');
            }

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

            $this->db->table('contact')->where('ContactID', $ContactID)->update(['EndDate' => NOW()]);

            return $this->respondDeleted([
                'status' => 'success',
                'message' => "Contact with {$ContactID} 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 prepareContactData(array $input): array {
        $data = [
            "NameFirst" => $input['NameFirst'] ?? null,
            "NameLast" => $input['NameLast'] ?? null,
            "Title" => $input['Title'] ?? null,
            "Initial" => $input['Initial'] ?? null,
            "Birthdate" => $input['Birthdate'] ?? null,
            "EmailAddress1" => $input['EmailAddress1'] ?? null,
            "EmailAddress2" => $input['EmailAddress2'] ?? null,
            "Phone" => $input["Phone"] ?? null,
            "MobilePhone1" => $input["MobilePhone1"] ?? null,
            "MobilePhone2" => $input["MobilePhone2"] ?? null,
            "Specialty" => $input["Specialty"] ?? null,
            "SubSpecialty" => $input["SubSpecialty"] ?? null,
        ];

        if(!empty($input["ContactID"])) { $data["ContactID"] = $input["ContactID"]; }

        return $data;
    }

    private function prepareContactDetailData(array $input): array {
        $data = [
            "ContactCode" => $input['ContactCode'] ?? null,
            "ContactEmail" => $input['ContactEmail'] ?? null,
            "OccupationID" => $input['OccupationID'] ?? null,
            "JobTitle" => $input['JobTitle'] ?? null,
            "Department" => $input['Department'] ?? null,
            "ContactStartDate" => $input['ContactStartDate'] ?? null,
            "ContactEndDate" => $input['ContactEndDate'] ?? null,
        ];
        
        return $data;
    }
}