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# Source code for mindroot.lib.templates

    import os
    import logging
    from jinja2 import Environment, FileSystemLoader, ChoiceLoader
    import re
    from .plugins import list_enabled, get_plugin_path
    from .parent_templates import get_parent_templates_env
    import traceback
    import sys

    # Import l8n translation functions
    try:
        from mindroot.coreplugins.l8n.utils import replace_placeholders, get_localized_file_path, extract_plugin_root
        from mindroot.coreplugins.l8n.mod import *
        from mindroot.coreplugins.l8n.middleware import get_request_language
        from mindroot.coreplugins.l8n.language_detection import get_fallback_language
        L8N_AVAILABLE = True
    except ImportError as e:
        trace = traceback.format_exc()
        print(f"L8n not available: {e} \n{trace}")
        L8N_AVAILABLE = False
        sys.exit(1)

    # TODO: get_parent_templates_env(plugins):
    # jinja2 environment containing only 1 template per plugin file name,
    # the first one that is found from plugins with that name,
    # need to look at how jinja2 loaders work

    def get_current_language():
        """Get the current language for translation."""
        if not L8N_AVAILABLE:
            return 'en'

        try:
            # Try to get language from request context
            lang = get_request_language()
            return get_fallback_language(lang) if lang else 'en'
        except Exception as e:
            print(f"Error getting current language: {e}")
            return 'en'

    def apply_translations_to_content(content, template_path=None):
        """Apply l8n translations to template content.

        Args:
            content (str): Template content with __TRANSLATE_key__ placeholders
            template_path (str): Path to the template file for plugin context

        Returns:
            str or None: Content with translations applied, or None if translations are incomplete
        """
        if not L8N_AVAILABLE or not content:
            return content

        try:
            current_language = get_current_language()

            # If we have a template path, use it for plugin context
            if template_path:
                # Check if translation failed (missing translations)
                translated = replace_placeholders(content, current_language, template_path)
                if translated is None:
                    return None  # Signal that translations are incomplete
                return translated
            else:
                # Fallback: try to replace without plugin context
                return replace_placeholders(content, current_language)
        except Exception as e:
            print(f"Error applying translations: {e}")
            return content

    def check_for_localized_template(template_path):
        """Check if a localized version of a template exists.

        Args:
            template_path (str): Original template path

        Returns:
            str: Path to localized template if it exists, None otherwise
        """
        if not L8N_AVAILABLE:
            return None

        try:
            localized_path = get_localized_file_path(template_path)
            if localized_path.exists():
                return str(localized_path)
        except Exception as e:
            print(f"Error checking for localized template: {e}")

        return None

    def load_template_with_translation(template_path):
        """Load a template and apply translations if available and complete.

        If translations are missing for the current language, this function
        will fall back to serving the original template to avoid showing
        __TRANSLATE_key__ placeholders to users.

        Args:
            template_path (str): Path to the template file

        Returns:
            str: Template content with translations applied, or original content
                 if translations are incomplete for the current language
        """
        # First check for localized version
        localized_path = check_for_localized_template(template_path)

        if localized_path:
            # Load localized template and apply translations
            try:
                with open(localized_path, 'r', encoding='utf-8') as f:
                    content = f.read()

                # Apply translations - if None is returned, translations are incomplete
                translated_content = apply_translations_to_content(content, localized_path)
                if translated_content is None:
                    # Fall back to original template
                    print(f"L8n: Falling back to original template due to missing translations: {template_path}")
                    with open(template_path, 'r', encoding='utf-8') as f:
                        return f.read()
                return translated_content
            except Exception as e:
                print(f"Error loading localized template {localized_path}: {e}")

        # Fallback to original template
        try:
            with open(template_path, 'r', encoding='utf-8') as f:
                content = f.read()
            return content  # Don't apply translations to original templates
        except Exception as e:
            print(f"Error loading template {template_path}: {e}")
            return ""

    def setup_template_environment(plugins=None):
        """Set up Jinja2 environment with multiple template paths.

        Returns:
            Environment: Configured Jinja2 environment
        """
        if plugins is None:
            plugins = list_enabled(False)
        template_paths = set(['templates'])  # Start with default templates directory

        # Add plugin template paths
        for plugin in plugins:
            plugin_path = get_plugin_path(plugin)
            if plugin_path:
                # Add main template directory
                template_dir = os.path.join(plugin_path, 'templates')
                if os.path.exists(template_dir):
                    template_paths.add(template_dir)
                    print(f"Added template path: {template_dir}")

                # Add inject directory
                inject_dir = os.path.join(plugin_path, 'inject')
                if os.path.exists(inject_dir):
                    template_paths.add(inject_dir)
                    # change color to green background, white text
                    print("\033[92m" + f"Added inject path: {inject_dir}")
                    # reset color
                    print("\033[0m")

                # Add parent directories to handle absolute paths
                template_paths.add(os.path.dirname(plugin_path))
                template_paths.add(os.path.dirname(os.path.dirname(plugin_path)))

        # Create environment with multiple loaders
        loaders = [FileSystemLoader(path) for path in template_paths]
        env = Environment(loader=ChoiceLoader(loaders))
        print(f"Initialized Jinja2 environment with paths: {template_paths}")
        return env

    # Create a Jinja2 environment with multiple template paths
    env = setup_template_environment()
    coreplugins =['admin', 'index', 'chat', 'chat_avatar', 'agent', 'jwt_auth', 'home', 'login', 'persona', 'events', 'user_service', 'usage', 'subscriptions', 'credits', 'startup']
    parent_env = get_parent_templates_env(coreplugins)

    async def find_parent_template(page_name, plugins):
        """Find parent template in enabled plugins.

        Args:
            page_name (str): Name of the template page
            plugins (list): List of enabled plugins

        Returns:
            str: Template path if found, None otherwise
        """
        for plugin in plugins:
            plugin_path = get_plugin_path(plugin)
            if not plugin_path:
                print(f'Warning: Could not find path for plugin: {plugin}')
                continue

            print(f'Checking plugin: {plugin}, path: {plugin_path}')
            template_path = os.path.join(plugin_path, 'templates', f'{page_name}.jinja2')

            if os.path.exists(template_path):
                print(f'Found parent template in plugin: {template_path}')
                # Convert to relative path from one of our template roots
                for loader in env.loader.loaders:
                    for template_dir in loader.searchpath:
                        rel_path = os.path.relpath(template_path, template_dir)
                        if not rel_path.startswith('..'):
                            print(f'Using template path: {rel_path}')
                            return rel_path
                # Fallback to absolute path if no relative path works
                return template_path
            else:
                print(f'No parent template found in plugin: {plugin}, template path was {template_path}')

                # Try alternate locations
                alt_paths = [
                    os.path.join(plugin_path, 'src', plugin, 'templates', f'{page_name}.jinja2'),
                    os.path.join(plugin_path, 'src', 'templates', f'{page_name}.jinja2'),
                ]

                for alt_path in alt_paths:
                    if os.path.exists(alt_path):
                        print(f'Found parent template in alternate location: {alt_path}')
                        # Convert to relative path
                        for loader in env.loader.loaders:
                            for template_dir in loader.searchpath:
                                rel_path = os.path.relpath(alt_path, template_dir)
                                if not rel_path.startswith('..'):
                                    print(f'Using template path: {rel_path}')
                                    return rel_path
                        return alt_path
        return None

    async def find_plugin_template(page_name, plugins):
        """Find a template in a plugin's templates directory.

        Args:
            page_name (str): Name of the template page
            plugins (list): List of enabled plugins

        Returns:
            tuple: (template_path, template_obj) if found, (None, None) otherwise
        """
        for plugin in plugins:
            plugin_path = get_plugin_path(plugin)
            if not plugin_path:
                print(f'Warning: Could not find path for plugin: {plugin}')
                continue

            # Try to find the template in the plugin's templates directory
            template_paths = [
                os.path.join(plugin_path, 'templates', f'{page_name}.jinja2'),
                os.path.join(plugin_path, 'src', plugin, 'templates', f'{page_name}.jinja2'),
                os.path.join(plugin_path, 'src', 'templates', f'{page_name}.jinja2'),
                os.path.join(plugin_path, 'src', plugin_path.split('/')[-1], 'templates', f'{page_name}.jinja2'),
            ]

            for path in template_paths:
                if os.path.exists(path):
                    print(f'Found template in plugin: {path}')
                    # Try to get the template from the environment
                    try:
                        # Convert to relative path from one of our template roots
                        for loader in env.loader.loaders:
                            for template_dir in loader.searchpath:
                                rel_path = os.path.relpath(path, template_dir)
                                if not rel_path.startswith('..'):
                                    template = env.get_template(rel_path)
                                    return rel_path, template
                    except Exception as e:
                        print(f'Error loading template: {e}')
        return None, None

    async def load_plugin_templates(page_name, plugins):
        """Load templates from plugins with translation support.

        Args:
            page_name (str): Name of the template page
            plugins (list): List of enabled plugins

        Returns:
            list: List of template info dictionaries
        """
        templates = []
        for plugin in plugins:
            try:
                plugin_path = get_plugin_path(plugin)
                if not plugin_path:
                    print(f'Warning: Could not find path for plugin: {plugin}')
                    continue

                #print(f"Loading templates from plugin: {plugin}, path: {plugin_path}")
                # plugin might be name rather than directory
                # get the last part of the path to check also
                #
                last_part = plugin_path.split('/')[-1]
                # Check inject templates
                inject_paths = [
                    os.path.join(plugin_path, 'inject', f'{page_name}.jinja2'),
                    os.path.join(plugin_path, 'src', plugin, 'inject', f'{page_name}.jinja2'),
                    os.path.join(plugin_path, 'src', 'inject', f'{page_name}.jinja2'),
                    os.path.join(plugin_path, 'src', last_part, 'inject', f'{page_name}.jinja2'),
                ]

                for path in inject_paths:
                    if os.path.exists(path):
                        # Load template content with translation support
                        content = load_template_with_translation(path)
                        if content:
                            #print(f"Found inject template at: {path}")
                            templates.append({'type': 'inject', 'template': env.from_string(content)})
                            break

                # Check override templates
                override_paths = [
                    os.path.join(plugin_path, 'override', f'{page_name}.jinja2'),
                    os.path.join(plugin_path, 'src', plugin, 'override', f'{page_name}.jinja2'),
                    os.path.join(plugin_path, 'src', 'override', f'{page_name}.jinja2'),
                    os.path.join(plugin_path, 'src', last_part, 'override', f'{page_name}.jinja2')
                ]

                for path in override_paths:
                    if os.path.exists(path):
                        # Load template content with translation support
                        content = load_template_with_translation(path)
                        if content:
                            # Detect top-of-file pragma to assume unspecified blocks are blank
                            # Accepted forms (case-insensitive):
                            #   {# assume-blank #}, {# assume_blank #}, {# assume-blank: true #}, {# assume_blank: true #}
                            assume_blank = False
                            head = content[:2048]
                            pragma_re = re.compile(r"^\s*\{#\s*(assume[-_]blank)(?:\s*true)?\s*#\}\s*", re.IGNORECASE | re.MULTILINE)
                            if pragma_re.search(head):
                                assume_blank = True
                                content = pragma_re.sub("", content, count=1)
                            templates.append({'type': 'override', 'template': env.from_string(content), 'assume_blank': assume_blank})
                            break

            except Exception as e:
                print(f'Error loading plugin template: {e}')
                continue
        return templates

    async def collect_content(template, blocks, template_type, data, assume_blank=False):
        """Collect content from child templates.

        Args:
            template: Jinja2 template object
            blocks (list): List of block names
            template_type (str): Type of template ('inject' or 'override')
            data (dict): Template context data
            assume_blank (bool): If True and type is 'override', unspecified blocks are blanked

        Returns:
            dict: Collected content by block
        """
        content = {block: {'inject': [], 'override': None} for block in blocks}

        # Get blocks that are actually defined in this template
        defined_blocks = set(template.blocks.keys())

        for block in blocks:
            if block in defined_blocks:
                # Block is explicitly defined in the template
                block_content = ''.join(template.blocks[block](template.new_context(data)))

                if template_type == 'override':
                    content[block]['override'] = block_content
                else:
                    content[block]['inject'].append(block_content)
            elif template_type == 'override' and assume_blank:
                # Block is NOT defined in override template, but assume_blank is True
                # So we treat it as if it was defined but empty
                content[block]['override'] = ''

        return content

    async def render_combined_template(page_name, plugins, context):
        """Render combined template with injections and overrides, including translation support.

        Args:
            page_name (str): Name of the template page
            plugins (list): List of enabled plugins
            context (dict): Template context data (can be None)

        Returns:
            str: Rendered HTML
        """
        # Check for assume-blank pragma and render directly if found
        for plugin in plugins:
            plugin_path = get_plugin_path(plugin)
            if not plugin_path:
                continue

            last_part = plugin_path.split('/')[-1]
            override_paths = [
                os.path.join(plugin_path, 'override', f'{page_name}.jinja2'),
                os.path.join(plugin_path, 'src', plugin, 'override', f'{page_name}.jinja2'),
                os.path.join(plugin_path, 'src', 'override', f'{page_name}.jinja2'),
                os.path.join(plugin_path, 'src', last_part, 'override', f'{page_name}.jinja2')
            ]

            for path in override_paths:
                if os.path.exists(path):
                    content = load_template_with_translation(path)
                    if content:
                        # Check for assume-blank pragma
                        head = content[:2048]
                        pragma_re = re.compile(r"^\s*\{#\s*(assume[-_]blank)(?:\s*true)?\s*#\}\s*", re.IGNORECASE | re.MULTILINE)
                        if pragma_re.search(head):
                            # Found assume-blank! Just render this template directly
                            print(f"Found assume-blank pragma in {path}, rendering directly without parent")
                            content = pragma_re.sub("", content, count=1)  # Remove pragma
                            template = env.from_string(content)
                            return template.render(**context)  # Return early!

        # If no assume-blank pragma found, continue with normal processing
        # Load parent template with translation support
        parent_template = None
        parent_template_path = None

        # Find the parent template file path
        # We need to search through the parent_env loaders to find the actual file
        for loader in parent_env.loader.loaders:
            for template_dir in loader.searchpath:
                potential_path = os.path.join(template_dir, f"{page_name}.jinja2")
                if os.path.exists(potential_path):
                    parent_template_path = potential_path
                    break
            if parent_template_path:
                break

        if parent_template_path:
            # Load the parent template with translation support
            parent_content = load_template_with_translation(parent_template_path)
            if parent_content:
                # Create a template object from the translated content
                parent_template = env.from_string(parent_content)
                # We need to preserve the original template name for Jinja2 inheritance
                parent_template.name = f"{page_name}.jinja2"
                parent_template.filename = parent_template_path
            else:
                # Fallback to loading without translation if something went wrong
                parent_template = parent_env.get_template(f"{page_name}.jinja2")
        else:
            # Fallback to original method if we can't find the file path
            parent_template = parent_env.get_template(f"{page_name}.jinja2")

        print(f"parent_template", parent_template)
        child_templates = await load_plugin_templates(page_name, plugins)
        parent_blocks = parent_template.blocks.keys()
        print(f"parent_blocks", parent_blocks)
        all_content = {block: {'inject': [], 'override': None} for block in parent_blocks}

        # Ensure context is a dictionary
        context = context or {}

        print("child_templates", child_templates)

        for child_template_info in child_templates:
            print("calling collect_content")
            # Pass assume_blank flag to collect_content
            child_content = await collect_content(
                child_template_info['template'],
                parent_blocks,
                child_template_info['type'],
                context,
                child_template_info.get('assume_blank', False)
            )
            for block, content in child_content.items():
                if content['override'] is not None:  # Check for None specifically, empty string is valid
                    all_content[block]['override'] = content['override']
                else:
                    all_content[block]['inject'].extend(content['inject'])

        combined_template_str = '{% extends layout_template %}\n'
        for block in all_content:
            if all_content[block]['override'] is not None:  # Check for None, empty string is valid override
                combined_template_str += f'{{% block {block} %}}\n    {{{{ combined_{block}_override|safe }}}}\n{{% endblock %}}\n'
            else:
                combined_template_str += f'{{% block {block} %}}\n  {{{{ super() }}}}\n   {{{{ combined_{block}_inject|safe }}}}\n{{% endblock %}}\n'

        combined_child_template = env.from_string(combined_template_str)

        combined_inject = {}
        combined_override = {}

        for block, content in all_content.items():
            if 'inject' in content and isinstance(content['inject'], list):
                # print with a yellow background, black text
                # report details including page name and content injected
                print("\033[103m" + f"Injecting into block {block} on page {page_name} with content:")
                print(content['inject'])
                # reset color
                print("\033[0m")
                combined_inject[f'combined_{block}_inject'] = ''.join(content['inject'])
            else:
                combined_inject[f'combined_{block}_inject'] = ''

            if 'override' in content and content['override'] is not None:
                combined_override[f'combined_{block}_override'] = content['override']

        print("in render combined, context is", context)

        rendered_html = combined_child_template.render(
            layout_template=parent_template,
            **combined_inject,
            **combined_override,
            **context
        )

        return rendered_html

    async def render_direct_template(template_path, context):
        """Render a template directly without combining with a parent template, with translation support.

        Args:
            template_path (str): Path to the template
            context (dict): Template context data

        Returns:
            str: Rendered HTML
        """
        # Ensure context is a dictionary
        context = context or {}

        try:
            # Check if we need to load with translation support
            template_full_path = None
            for loader in env.loader.loaders:
                for template_dir in loader.searchpath:
                    potential_path = os.path.join(template_dir, template_path)
                    if os.path.exists(potential_path):
                        template_full_path = potential_path
                        break
                if template_full_path:
                    break

            if template_full_path:
                # Load with translation support
                content = load_template_with_translation(template_full_path)
                if content:
                    template = env.from_string(content)
                    return template.render(**context)

            # Fallback to normal template loading
            template = env.get_template(template_path)
            return template.render(**context)
        except Exception as e:
            logging.error(f"Error rendering template {template_path}: {e}")
            return f"<h1>Error rendering template</h1><p>{str(e)}</p>"

    async def render(page_name, context):
        """Render a template with plugin injections, overrides, and translation support.
        If no parent template exists, tries to render a template directly from a plugin.

        Args:
            page_name (str): Name of the template page
            context (dict): Template context data (can be None)

        Returns:
            str: Rendered HTML
        """
        plugins = list_enabled(False)
        # print with white background red text
        # report details including page name and plugins enabled
        print("\033[101m" + f"Rendering page {page_name} with plugins enabled:")
        print(plugins)
        print("\033[0m")

        # Ensure context is a dictionary
        context = context or {}

        # First try to render with the combined template approach
        try:
            parent_env.get_template(f"{page_name}.jinja2")
        except Exception as e:
            trace = traceback.format_exc()
            print(f"Error finding parent template for {page_name}: {e}\n\n{trace}")
            print(f"No parent template found for {page_name}, trying direct rendering: {e}")

            # Try to find and render a template directly from a plugin
            template_path, _ = await find_plugin_template(page_name, plugins)
            if template_path:
                return await render_direct_template(template_path, context)

            return f"<h1>Template Not Found</h1><p>No template found for '{page_name}'</p>"

        try:
            return await render_combined_template(page_name, plugins, context)
        except Exception as e:
            trace = traceback.format_exc()
            print(f"Error rendering {page_name}: {e}\n\n{trace}")
            return f"<h1>Error Rendering Page</h1><p>{str(e)}</p><pre>{trace}</pre>"