<?php
if (!defined('ABSPATH')) { exit; }

class Aiva_Lite_Settings {
    public function register(): void {
        register_setting('aiva_lite_group', AIVA_LITE_OPTION_KEY, array('sanitize_callback' => array($this, 'sanitize'), 'show_in_rest' => false));
    }

    public function defaults(): array {
        return array(
            'connected' => '0', 'site_token' => '', 'install_key' => '', 'embed_key' => '',
            'assistant_id' => '', 'assistant_slug' => '', 'assistant_name' => '',
            'account_id' => '', 'site_id' => '', 'connected_domain' => '', 'plan' => 'lite',
            'subscription_status' => '', 'trial_ends_at' => '', 'runtime_available' => '1',
            'embed_enabled' => '1', 'auto_insert' => '1', 'position' => 'bottom-right',
            'accent_color' => '#f97316', 'last_sync_at' => '', 'sync_error' => '',
            'service_consent' => '0', 'pairing_id' => '', 'pairing_secret' => '',
            'authorization_url' => '', 'pairing_expires_at' => '', 'version' => AIVA_LITE_VERSION,
        );
    }

    public function get_all(): array {
        return wp_parse_args(get_option(AIVA_LITE_OPTION_KEY, array()), $this->defaults());
    }

    public function get(string $key, $default = null) {
        $options = $this->get_all();
        return $options[$key] ?? $default;
    }

    public function service_url(string $service): string {
        $urls = array(
            'api' => array('AIVA_LITE_API_URL', 'https://api.aiva.aiintegrations.tech'),
            'autobuild' => array('AIVA_LITE_AUTOBUILD_URL', 'https://autobuild.aiintegrations.tech'),
            'dashboard' => array('AIVA_LITE_DASHBOARD_URL', 'https://dashboard.aiintegrations.tech'),
            'widget' => array('AIVA_LITE_WIDGET_URL', 'https://aiva.aiintegrations.tech'),
        );
        if (!isset($urls[$service])) { return ''; }
        list($constant, $fallback) = $urls[$service];
        // Development endpoints require explicit configuration by the site owner.
        $value = defined($constant) ? constant($constant) : $fallback;
        $parts = wp_parse_url((string) $value);
        return !empty($parts['host']) && ($parts['scheme'] ?? '') === 'https' && empty($parts['user']) && empty($parts['pass'])
            ? untrailingslashit(esc_url_raw($value)) : $fallback;
    }

    public function dashboard_link(bool $billing = false): string {
        $id = $this->get('assistant_id');
        $path = $id ? '/dashboard/assistant/' . rawurlencode($id) . ($billing ? '/billing' : '/overview') : '/dashboard/assistants';
        return $this->service_url('dashboard') . $path;
    }

    public function update(array $values): void {
        update_option(AIVA_LITE_OPTION_KEY, $this->sanitize(array_merge($this->get_all(), $values)), false);
    }

    public function reset_pairing(): void {
        $this->update(array('pairing_id' => '', 'pairing_secret' => '', 'authorization_url' => '', 'pairing_expires_at' => ''));
    }

    public function reset_connection(): void {
        $values = array();
        foreach (array('site_token', 'install_key', 'embed_key', 'assistant_id', 'assistant_slug', 'assistant_name', 'account_id', 'site_id', 'connected_domain', 'subscription_status', 'trial_ends_at', 'last_sync_at', 'sync_error') as $key) { $values[$key] = ''; }
        $this->update(array_merge($values, array('connected' => '0', 'plan' => 'lite')));
        $this->reset_pairing();
        delete_transient('aiva_lite_status_cache');
        delete_transient('aiva_lite_summary_cache');
    }

    public function mark_connected_from_payload(array $payload, string $install_key = ''): bool {
        if (empty($payload['assistant_id']) || empty($payload['assistant_slug']) || empty($payload['site_token']) || empty($payload['site_id'])) { return false; }
        $this->update(array(
            'connected' => '1', 'service_consent' => '1', 'install_key' => '',
            'site_token' => $payload['site_token'], 'site_id' => $payload['site_id'],
            'account_id' => $payload['account_id'] ?? '', 'assistant_id' => $payload['assistant_id'],
            'assistant_slug' => $payload['assistant_slug'], 'assistant_name' => $payload['assistant_name'] ?? $payload['assistant_slug'],
            'connected_domain' => $payload['connected_domain'] ?? home_url(),
        ));
        $this->apply_status($payload);
        $this->reset_pairing();
        delete_transient('aiva_lite_status_cache');
        delete_transient('aiva_lite_summary_cache');
        return true;
    }

    public function apply_status(array $payload): void {
        $this->update(array(
            'plan' => $payload['plan'] ?? 'lite', 'subscription_status' => $payload['subscription_status'] ?? '',
            'trial_ends_at' => $payload['trial_ends_at'] ?? '',
            'runtime_available' => !empty($payload['runtime_available']) ? '1' : '0',
            'last_sync_at' => current_time('mysql'), 'sync_error' => '',
        ));
    }

    public function sanitize($input): array {
        $input = is_array($input) ? $input : array();
        $output = array();
        foreach ($this->defaults() as $key => $default) {
            $value = $input[$key] ?? $default;
            if (!is_scalar($value)) { $value = $default; }
            if (in_array($key, array('connected', 'embed_enabled', 'auto_insert', 'service_consent', 'runtime_available'), true)) {
                $output[$key] = !empty($value) ? '1' : '0';
            } elseif ($key === 'accent_color') {
                $output[$key] = sanitize_hex_color($value) ?: $default;
            } elseif ($key === 'position') {
                $output[$key] = $value === 'bottom-left' ? 'bottom-left' : 'bottom-right';
            } elseif ($key === 'plan') {
                $output[$key] = in_array($value, array('lite', 'trial', 'paid'), true) ? $value : 'lite';
            } elseif (in_array($key, array('connected_domain', 'authorization_url'), true)) {
                $output[$key] = esc_url_raw((string) $value, array('https', 'http'));
            } else { $output[$key] = sanitize_text_field((string) $value); }
        }
        return $output;
    }
}