/**
 * JQHTML Integration - Automatic component registration and binding
 *
 * This module automatically:
 * 1. Registers component classes that extend Component
 * 2. Binds templates to component classes when names match
 * 3. Enables $(selector).component("Component_Name") syntax
 */
class Jqhtml_Integration {
    /**
     * Compiled Jqhtml templates self-register.  The developer (the framework in this case) is still
     * responsible for registering es6 component classes with jqhtml.  This does so at an early stage
     * of framework init.
     */
    static _on_framework_modules_define() {
        let jqhtml_components = Manifest.get_extending('Component');

        console_debug('JQHTML_INIT', 'Registering ' + jqhtml_components.length + ' Components');

        for (let component of jqhtml_components) {
            jqhtml.register_component(component.class_name, component.class_object);
        }

        // Assign unique cache IDs to all static methods for component caching
        // This enables JQHTML to generate deterministic cache keys when functions
        // are passed as component arguments (e.g., DataGrid data_source functions)
        const all_classes = Manifest.get_all_classes();
        let methods_tagged = 0;

        for (const class_info of all_classes) {
            const class_object = class_info.class_object;
            const class_name = class_info.class_name;

            // Get all property names from the class object (static methods/properties)
            const property_names = Object.getOwnPropertyNames(class_object);

            for (const property_name of property_names) {
                // Skip built-in properties and non-functions
                if (property_name === 'length' ||
                    property_name === 'name' ||
                    property_name === 'prototype') {
                    continue;
                }

                const property_value = class_object[property_name];

                // Only tag functions (static methods)
                if (typeof property_value === 'function') {
                    // Assign unique cache ID: "ClassName.methodName"
                    property_value._jqhtml_cache_id = `${class_name}.${property_name}`;
                    methods_tagged++;
                }
            }
        }

        console_debug('JQHTML_INIT', `Tagged ${methods_tagged} static methods with _jqhtml_cache_id`);

        // Set the cache key for jqhtml to the application key to enable component caching in local storage.
        // Modifying the application or the user logging out modifies the scope_key and will invalidate jqhtml cache.
        jqhtml.set_cache_key(Rsx.scope_key());

        // set this to true if we desire jqhtml verbose output (probably not necessary for end developers)
        window.jqhtml.debug.verbose = false;
    }

    /**
     * Framework modules init phase - Bind components and initialize DOM
     * This runs after templates are registered to bind component classes
     * @param {jQuery} [$scope] Optional scope to search within (defaults to body)
     * @returns {Array<Promise>|undefined} Array of promises for recursive calls, undefined for top-level
     */
    static _on_framework_modules_init($scope) {
        const is_top_level = !$scope;
        const promises = [];
        const components_needing_init = ($scope || $('body')).find('.Component_Init');
        if (components_needing_init.length > 0) {
            console_debug('JQHTML_INIT', `Initializing ${components_needing_init.length} DOM components`);
        }

        components_needing_init.each(function () {
            const $element = $(this);

            // Skip if element is no longer attached to the document
            // (may have been removed by a parent component's .empty() call)
            if (!document.contains($element[0])) {
                return;
            }

            // Check if any parent has Component_Init class - skip nested components
            let parent = $element[0].parentElement;
            while (parent) {
                if (parent.classList.contains('Component_Init')) {
                    return; // Skip this element, it's nested
                }
                parent = parent.parentElement;
            }

            const component_name = $element.attr('data-component-init-name');

            // jQuery's .data() doesn't auto-parse JSON - we need to parse it manually
            let component_args = {};
            const args_string = $element.attr('data-component-args');

            // Unset component- php side initialization args, it is no longer needed as a compionent attribute
            // Unsetting also prevents undesired access to this code in other parts of the program, prevening an
            // unwanted future dependency on this paradigm
            $element.removeAttr('data-component-init-name');
            $element.removeAttr('data-component-args');
            $element.removeData('component-init-name');
            $element.removeData('component-args');

            if (args_string) {
                try {
                    component_args = JSON.parse(args_string);
                } catch (e) {
                    console.error(`[JQHTML Integration] Failed to parse component args for ${component_name}:`, e);
                    component_args = {};
                }
            }

            if (component_name) {
                // Transform $ prefixed keys to data- attributes
                let component_args_filtered = {};
                for (const [key, value] of Object.entries(component_args)) {
                    // if (key.startsWith('$')) {
                    // component_args_filtered[key.substring(1)] = value;
                    // } else
                    if (key.startsWith('data-')) {
                        component_args_filtered[key.substring(5)] = value;
                    } else {
                        component_args_filtered[key] = value;
                    }
                }

                try {
                    // Store inner HTML as string for nested component processing
                    component_args_filtered._inner_html = $element.html();
                    $element.empty();

                    // Remove the init class before instantiation to prevent re-initialization
                    $element.removeClass('Component_Init');

                    // Create promise for this component's initialization
                    const component_promise = new Promise((resolve) => {
                        // Use jQuery component plugin to create the component
                        // Plugin handles element internally, just pass args
                        // Get the updated $element from
                        let component = $element.component(component_name, component_args_filtered).component();

                        component.on('render', function () {
                            // Recursively collect promises from nested components

                            // Getting the updated component here - if the tag name was not div, the element would have been recreated, so we need to get the element set on the component, not from our earlier selector

                            const nested_promises = Jqhtml_Integration._on_framework_modules_init(component.$);
                            promises.push(...nested_promises);

                            // Resolve this component's promise
                            resolve();
                        }).$;
                    });

                    promises.push(component_promise);
                } catch (error) {
                    console.error(`[JQHTML Integration] Failed to initialize component ${component_name}:`, error);
                    console.error('Error details:', error.stack || error);
                }
            }
        });

        // Top-level call: spawn async handler to wait for all promises, then trigger event
        if (is_top_level) {
            (async () => {
                await Promise.all(promises);
                await Rsx._rsx_call_all_classes('on_jqhtml_ready');
                Rsx.trigger('jqhtml_ready');
            })();
            return;
        }

        // Recursive call: return promises for parent to collect
        return promises;
    }

    /**
     * Get all registered component names
     * @returns {Array<string>} Array of component names
     */
    static get_component_names() {
        return jqhtml.get_component_names();
    }

    /**
     * Check if a component is registered
     * @param {string} name Component name
     * @returns {boolean} True if component is registered
     */
    static has_component(name) {
        return jqhtml.has_component(name);
    }
}

// RSX manifest automatically makes classes global - no manual assignment needed