<?php

if (! defined('ABSPATH')) {
    exit;
}

/**
 * The text the plugin's scripts show, translated in PHP and handed to them,
 * so one set of translation files covers PHP and JavaScript alike.
 *
 * Strings are grouped by script (see groups()), each keyed by a short name.
 * attach() puts a group on the page ahead of the script that uses it, as
 * window.rsvlI18n[group], and the script reads it from there:
 * rsvlI18n.admin.trainingComplete.
 *
 * Placeholders (%s, %d, %1$s) are filled in by the script, so translators can
 * move them. Each string with one gets a translators comment.
 *
 * There are no plurals: the right form for a count the script works out
 * depends on the language's plural rule, which PHP can't apply in advance.
 * Either the server sends the finished text with each new count ("32 pages"),
 * or the count is written so no word agrees with it ("3/32 selected").
 *
 * Pro adds its scripts' groups through the resolver_script_string_groups
 * filter.
 */
class RSVL_Script_Strings
{
    /**
     * Put a group's strings on the page ahead of a script: window.rsvlI18n[group].
     */
    public static function attach(string $handle, string $group): void
    {
        $script = sprintf('window.rsvlI18n = window.rsvlI18n || {}; window.rsvlI18n[%s] = %s;', wp_json_encode($group), wp_json_encode(self::get($group)));
        wp_add_inline_script($handle, $script, 'before');
    }

    /**
     * A group's strings, key => translated text.
     */
    public static function get(string $group): array
    {
        $groups = self::groups();

        return isset($groups[ $group ]) ? (array) call_user_func($groups[ $group ]) : [];
    }

    /** admin.js: every admin screen. */
    public static function admin(): array
    {
        return [
            // Model tab.
            'connected'             => __('Connected', 'resolver-ai-chatbot'),
            'notConnected'          => __('Not connected.', 'resolver-ai-chatbot'),
            'enterApiKey'           => __('Enter API Key', 'resolver-ai-chatbot'),
            'chooseModel'           => __('Choose an AI model', 'resolver-ai-chatbot'),
            'chooseProviderFirst'   => __('Choose an AI platform first', 'resolver-ai-chatbot'),
            'upgradeEmbeddingModel' => __('Upgrade embedding model', 'resolver-ai-chatbot'),
            'upgrading'             => __('Upgrading…', 'resolver-ai-chatbot'),
            'upgradeFailed'         => __('Could not start the upgrade. Please try again.', 'resolver-ai-chatbot'),
            'retrainingInProgress'  => __('Retraining in progress…', 'resolver-ai-chatbot'),
            'upgradeComplete'       => __('Retraining complete. Your embedding model has been upgraded.', 'resolver-ai-chatbot'),
            'dismiss'               => __('Dismiss', 'resolver-ai-chatbot'),
            /* translators: %s: name of the training platform chosen, e.g. Google Gemini. */
            'providerSwitch' => __('Saving will retrain all of your content with %s, and take you to the Training menu to follow along.', 'resolver-ai-chatbot'),
            /* translators: %s: name of the training platform chosen, e.g. Google Gemini. */
            'providerSwitchNotConnected' => __('Connect %s before switching to it, since saving will retrain all of your content with it.', 'resolver-ai-chatbot'),
            'providerSwitchTraining'     => __('Training is in progress. You can switch training platforms once it finishes.', 'resolver-ai-chatbot'),
            'embeddingModel'             => __('Model:', 'resolver-ai-chatbot'),
            'embeddingProviderDesc'      => __('This can be different than the AI platform you select. Anthropic does not have an API for training/embedding.', 'resolver-ai-chatbot'),

            // Training tab.
            'enableEditing'  => __('Enable Editing', 'resolver-ai-chatbot'),
            'disableEditing' => __('Disable Editing', 'resolver-ai-chatbot'),
            'train'          => __('Train', 'resolver-ai-chatbot'),
            'training'       => __('Training', 'resolver-ai-chatbot'),
            'trained'        => __('Trained', 'resolver-ai-chatbot'),
            'error'          => __('Error', 'resolver-ai-chatbot'),
            'cannotDelete'   => __('Cannot delete while training', 'resolver-ai-chatbot'),
            'cannotReindex'  => __('Cannot re-index while training', 'resolver-ai-chatbot'),
            /* translators: 1: number of items selected. 2: number of items listed. */
            'selectedCount'     => __('%1$s/%2$s selected', 'resolver-ai-chatbot'),
            'trainingBeginning' => __('Training beginning…', 'resolver-ai-chatbot'),
            'trainingFailed'    => __('Could not start training. Please try again.', 'resolver-ai-chatbot'),
            'trainingComplete'  => __('Training complete', 'resolver-ai-chatbot'),
            'extractingPdfs'    => __('Extracting text from PDFs', 'resolver-ai-chatbot'),

            // Visibility tab.
            'noResults' => __('No results found', 'resolver-ai-chatbot'),
            'remove'    => __('Remove', 'resolver-ai-chatbot'),

            // Chats tab.
            'selectChat'         => __('Select a chat to view messages', 'resolver-ai-chatbot'),
            'closeConversation'  => __('Close conversation', 'resolver-ai-chatbot'),
            'admin'              => __('Admin', 'resolver-ai-chatbot'),
            'model'              => __('Model:', 'resolver-ai-chatbot'),
            'tokensUsed'         => __('Tokens used:', 'resolver-ai-chatbot'),
            'messages'           => __('Messages:', 'resolver-ai-chatbot'),
            'loadMessagesFailed' => __('Failed to load messages.', 'resolver-ai-chatbot'),
            'noMessages'         => __('No messages found.', 'resolver-ai-chatbot'),
            'connectionFailed'   => __('Could not connect to server.', 'resolver-ai-chatbot'),
            'confirmDeleteChat'  => __('Are you sure you want to delete this chat? This cannot be undone.', 'resolver-ai-chatbot'),
            'deleteChatFailed'   => __('Failed to delete chat.', 'resolver-ai-chatbot'),
            'noConversations'    => __('No conversations found.', 'resolver-ai-chatbot'),
            'newerConversations' => __('Newer conversations', 'resolver-ai-chatbot'),
            'olderConversations' => __('Older conversations', 'resolver-ai-chatbot'),

            // Settings form.
            'unsavedChanges' => __('Unsaved changes', 'resolver-ai-chatbot'),
            'settingsSaved'  => __('Saved', 'resolver-ai-chatbot'),
            'saveFailed'     => __('Could not save your changes', 'resolver-ai-chatbot'),
            /* translators: %s: percentage of the monthly token limit used so far. */
            'tokenLimitUsed' => __('%s%% of monthly token limit used', 'resolver-ai-chatbot'),
        ];
    }

    /** admin-charts.js: the dashboard's token chart. */
    public static function charts(): array
    {
        return [
            'inputTokens'    => __('Input tokens', 'resolver-ai-chatbot'),
            'outputTokens'   => __('Output tokens', 'resolver-ai-chatbot'),
            'trainingTokens' => __('Training tokens', 'resolver-ai-chatbot'),
        ];
    }

    /** chat-widget.js: the chat widget, on the site and in the admin preview. */
    public static function widget(): array
    {
        return [
            // Shown if the site owner clears the bot name.
            'botName' => __('AI Assistant', 'resolver-ai-chatbot'),
            'helpful' => __('Helpful', 'resolver-ai-chatbot'),
            // How long ago a message was sent, updated every minute.
            'justNow' => __('just now', 'resolver-ai-chatbot'),
            /* translators: %s: number of minutes. Abbreviated, so it reads the same for any number. */
            'minutesAgo' => __('%s min ago', 'resolver-ai-chatbot'),
            /* translators: %s: number of hours. Abbreviated, so it reads the same for any number. */
            'hoursAgo'        => __('%s hr ago', 'resolver-ai-chatbot'),
            'notHelpful'      => __('Not helpful', 'resolver-ai-chatbot'),
            'tooManyMessages' => __('Too many messages. Please wait a minute before trying again.', 'resolver-ai-chatbot'),
            'requestFailed'   => __('Something went wrong. Please try again.', 'resolver-ai-chatbot'),
        ];
    }

    /**
     * Group name => callable returning its strings.
     */
    private static function groups(): array
    {
        /**
         * Filter the script string groups. Pro adds the groups for its scripts.
         *
         * @param array<string, callable> $groups Group name => callable returning its strings.
         */
        return (array) apply_filters('resolver_script_string_groups', [
            'admin'  => [self::class, 'admin'],
            'charts' => [self::class, 'charts'],
            'widget' => [self::class, 'widget'],
        ]);
    }
}