<?php
class User {
    private $db;
    public function __construct() {
        $this->db = new Database();
    }
    public static function parseProjects($projects): array {
        if (empty($projects)) {
            return [];
        }

        if (is_string($projects)) {
            $trimmed = trim($projects);
            while (is_string($trimmed) && (str_starts_with($trimmed, '[') || str_starts_with($trimmed, '{') || str_starts_with($trimmed, '"'))) {
                $decoded = json_decode($trimmed, true);
                if (json_last_error() === JSON_ERROR_NONE && $decoded !== null) {
                    $trimmed = $decoded;
                } else {
                    break;
                }
            }
            if (is_array($trimmed)) {
                $projects = $trimmed;
            } else {
                $projects = explode(',', (string)$trimmed);
            }
        }

        if (!is_array($projects)) {
            return [];
        }

        $allModules = ModuleService::getAll();
        $slugMap = [];
        foreach ($allModules as $s => $m) {
            $slugMap[strtolower($s)] = $s;
            $slugMap[strtolower($m['name'])] = $s;
            $slugMap[strtolower(str_replace([' ', '-', '_'], '', $m['name']))] = $s;
            $slugMap[strtolower(ltrim($m['path'], '/'))] = $s;
        }
        $slugMap['web audio synth'] = 'test';
        $slugMap['webaudiosynth'] = 'test';
        $slugMap['synth'] = 'test';
        $slugMap['geschichtenmaschine'] = 'storymachine';
        $slugMap['geschichten-maschine'] = 'storymachine';
        $slugMap['pflanzen'] = 'plants';
        $slugMap['pflanzentracker'] = 'plants';

        $ignore = ['on', 'off', 'true', 'false', '1', '0', 'null', 'undefined'];

        $clean = [];
        foreach ($projects as $key => $val) {
            $candidates = [];
            if (is_string($key) && !is_numeric($key)) {
                $candidates[] = $key;
                if (is_string($val) && !in_array(strtolower(trim($val)), $ignore, true)) {
                    $candidates[] = $val;
                }
            } else {
                if (is_string($val) && !in_array(strtolower(trim($val)), $ignore, true)) {
                    $candidates[] = $val;
                } elseif (is_array($val)) {
                    if (!empty($val['slug'])) $candidates[] = $val['slug'];
                    elseif (!empty($val['name'])) $candidates[] = $val['name'];
                    elseif (!empty($val['id'])) $candidates[] = $val['id'];
                    elseif (!empty($val['project'])) $candidates[] = $val['project'];
                    else {
                        foreach ($val as $sub) {
                            if (is_string($sub) && !in_array(strtolower(trim($sub)), $ignore, true)) {
                                $candidates[] = $sub;
                            }
                        }
                    }
                }
            }

            foreach ($candidates as $cand) {
                $candSan = trim($cand, " \t\n\r\0\x0B[]\"'/");
                if (empty($candSan)) continue;

                // Check if candidate contains colon or equals, e.g. "plants:plants" or "storymachine:geschichtenmaschine"
                $subParts = preg_split('/[:=]/', $candSan);
                $matched = false;
                foreach ($subParts as $part) {
                    $pSan = trim($part, " \t\n\r\0\x0B[]\"'/");
                    if (empty($pSan)) continue;
                    $pLower = strtolower($pSan);
                    $pNorm = str_replace([' ', '-', '_'], '', $pLower);
                    if (isset($slugMap[$pLower])) {
                        $clean[] = $slugMap[$pLower];
                        $matched = true;
                        break;
                    } elseif (isset($slugMap[$pNorm])) {
                        $clean[] = $slugMap[$pNorm];
                        $matched = true;
                        break;
                    }
                }
                if (!$matched) {
                    $lower = strtolower($candSan);
                    $normalized = str_replace([' ', '-', '_'], '', $lower);
                    if (isset($slugMap[$lower])) {
                        $clean[] = $slugMap[$lower];
                    } elseif (isset($slugMap[$normalized])) {
                        $clean[] = $slugMap[$normalized];
                    } elseif (isset($allModules[$lower])) {
                        $clean[] = $lower;
                    }
                }
            }
        }
        return array_values(array_unique($clean));
    }

    // Auth-Logic
    public function authenticate($email, $password) {
        $this->db->query("SELECT * FROM home_users WHERE email = :email AND status = 'Active'");
        $this->db->bind(':email', $email);
        $user = $this->db->single();
        if ($user && password_verify($password, $user['password'])) {
            $user['projects'] = self::parseProjects($user['projects'] ?? []);
            if (in_array(strtolower($user['email']), ['philipp.urbschat@gmail.com', 'hi@philippurbschat.de'])) {
                $user['is_admin'] = true;
            } else {
                $user['is_admin'] = (bool)$user['is_admin'];
            }
            return $user;
        }
        return false;
    }
    // Data-Retrieval
    public function getAll() {
        $this->db->query("SELECT id, name, email, is_admin, status, projects FROM home_users ORDER BY id DESC");
        $users = $this->db->resultSet();
        foreach ($users as &$user) {
            $user['projects'] = self::parseProjects($user['projects'] ?? []);
        }
        return $users;
    }
    public function getById($id) {
        $this->db->query("SELECT * FROM home_users WHERE id = :id");
        $this->db->bind(':id', $id);
        $user = $this->db->single();
        if ($user) {
            $user['projects'] = self::parseProjects($user['projects'] ?? []);
        }
        return $user;
    }
    // Persistence
    public function save($data, $id = null) {
        $projectsList = self::parseProjects($data['projects'] ?? []);
        $projectsJson = json_encode($projectsList);
        if ($id) {
            $sql = "UPDATE home_users SET name = :name, email = :email, projects = :projects, is_admin = :is_admin, status = :status ";
            if (!empty($data['password'])) {
                $sql .= ", password = :password ";
            }
            $sql .= "WHERE id = :id";
            $this->db->query($sql);
            $this->db->bind(':id', $id);
        } else {
            $sql = "INSERT INTO home_users (name, email, password, projects, is_admin, status) VALUES (:name, :email, :password, :projects, :is_admin, :status)";
            $this->db->query($sql);
        }
        $this->db->bind(':name', $data['name']);
        $this->db->bind(':email', $data['email']);
        $this->db->bind(':projects', $projectsJson);
        $this->db->bind(':is_admin', !empty($data['is_admin']) ? 1 : 0);
        $this->db->bind(':status', $data['status']);
        if (!$id || !empty($data['password'])) {
            $this->db->bind(':password', password_hash($data['password'], PASSWORD_DEFAULT));
        }
        return $this->db->execute();
    }
    public function delete($id) {
        $this->db->query("DELETE FROM home_users WHERE id = :id");
        $this->db->bind(':id', $id);
        return $this->db->execute();
    }

    public function findByEmail(string $email): ?array {
        $this->db->query("SELECT * FROM home_users WHERE LOWER(email) = LOWER(:email)");
        $this->db->bind(':email', trim($email));
        $user = $this->db->single();
        if ($user) {
            $user['projects'] = self::parseProjects($user['projects'] ?? []);
        }
        return $user ?: null;
    }

    public function updatePassword(int $id, string $newPasswordHash): bool {
        $this->db->query("UPDATE home_users SET password = :password WHERE id = :id");
        $this->db->bind(':password', $newPasswordHash);
        $this->db->bind(':id', $id);
        return $this->db->execute();
    }
}