# email_actions.py
# Filepath: ai-email-assistant/email_actions.py
# Handles email template management and actions

import logging
import gradio as gr
from google_sheets_utils import get_templates_from_sheet, save_template, delete_template_from_sheet, generate_template_id, update_template_in_sheet

logger = logging.getLogger(__name__)

def get_templates(spreadsheet):
    try:
        return get_templates_from_sheet(spreadsheet.worksheet("Email Templates"))
    except Exception as e:
        logger.error(f"Error fetching templates: {str(e)}")
        return []

def get_template_summaries(spreadsheet):
    templates = get_templates_from_sheet(spreadsheet.worksheet("Email Templates"))
    return [f"{template['Name']} ({template['Type']})" for template in templates]

def create_email_actions_interface(spreadsheet, current_template):
    worksheet = spreadsheet.worksheet("Email Templates")
    
    with gr.Blocks() as email_actions_block:
        gr.Markdown("## Email Actions")
        
        t_name = gr.Textbox(label="Template Name", elem_id="t_name")
        t_type = gr.Dropdown(
            ["Cold Email", "Follow-up", "Thank You", "Other"], 
            label="Template Type", 
            allow_custom_value=True,
            elem_id="t_type"
        )
        t_subject = gr.Textbox(label="Subject", elem_id="t_subject")
        t_body = gr.Textbox(label="Body", lines=5, elem_id="t_body")
        t_id = gr.Textbox(label="Template ID", interactive=False, elem_id="t_id")
        
        headers = ["Type", "ID", "Name", "Subject", "Body"]
        
        templates_list = gr.Dataframe(
            headers=headers,
            label="Email Templates List",
            interactive=False,
            elem_id="t_templates_list"
        )
        
        save_btn = gr.Button("Save New Template", elem_id="t_save_btn")
        update_btn = gr.Button("Update Existing Template", elem_id="t_update_btn")
        delete_btn = gr.Button("Delete Template", elem_id="t_delete_btn")
        clear_btn = gr.Button("Clear Fields", elem_id="t_clear_btn")
        
        def refresh_templates():
            templates = get_templates(spreadsheet)
            return [[template.get(h, "") for h in headers] for template in templates]
        
        def load_template(evt: gr.SelectData, current_name, current_type, current_subject, current_body, current_id):
            templates = get_templates(spreadsheet)
            selected_row = evt.index[0]
            selected_template = templates[selected_row]
            
            logger.debug(f"Selected Email Template: {selected_template}")
            
            # Check if ANY field is non-empty
            fields = [current_name, current_type, current_subject, current_body, current_id]
            non_empty_fields = any(field and field.strip() != "" for field in fields)
            
            logger.debug(f"Any email template field non-empty: {non_empty_fields}")
            
            if non_empty_fields:
                logger.warning("Email template fields not empty, showing warning")
                gr.Warning("Please clear all fields before loading a new email template.")
                return [gr.update() for _ in range(5)]  # Don't update any fields
            
            logger.info("Loading selected email template")
            try:
                return (
                    selected_template["Name"],
                    selected_template["Type"],
                    selected_template["Subject"],
                    selected_template["Body"],
                    selected_template["ID"]
                )
            except KeyError as e:
                logger.error(f"Error loading template: missing key {e}")
                gr.Error(f"Error loading template: missing information")
                return [gr.update() for _ in range(5)]

        def save_template_action(name, template_type, subject, body):
            # Check for empty fields
            if not name or not template_type or not subject or not body:
                message = gr.HTML("<p style='color:red;'>All fields are required. Please fill in all details before saving.</p>")
                return gr.update(), message, refresh_templates()
            
            new_id = generate_template_id()
            template_data = [
                "Email Templates",  # Type
                new_id,             # ID
                name,
                template_type,
                subject,
                body
            ]
            result = save_template(worksheet, template_data)
            if result:
                message = gr.HTML("<p style='color:green;'>Template added successfully.</p>")
            else:
                message = gr.HTML("<p style='color:red;'>Failed to add template.</p>")
            return gr.update(), message, refresh_templates()
        
        def update_template_action(template_id, name, template_type, subject, body):
            # Check for empty fields
            if not template_id:
                message = gr.HTML("<p style='color:red;'>No template selected. Please select a template to update.</p>")
                return gr.update(), message, refresh_templates()
            if not name or not template_type or not subject or not body:
                message = gr.HTML("<p style='color:red;'>All fields are required. Please fill in all details before updating.</p>")
                return gr.update(), message, refresh_templates()
            
            updated_data = [
                "Email Templates",  # Type
                template_id,
                name,
                template_type,
                subject,
                body
            ]
            result = update_template_in_sheet(worksheet, template_id, updated_data)
            if result:
                message = gr.HTML("<p style='color:green;'>Template updated successfully.</p>")
            else:
                message = gr.HTML("<p style='color:red;'>Failed to update template.</p>")
            return gr.update(), message, refresh_templates()
        
        def delete_template_action(template_id):
            if not template_id:
                message = gr.HTML("<p style='color:red;'>No template selected. Please select a template to delete.</p>")
                return message, refresh_templates()
            
            result = delete_template_from_sheet(worksheet, template_id)
            if result:
                message = gr.HTML("<p style='color:green;'>Template deleted successfully.</p>")
            else:
                message = gr.HTML("<p style='color:red;'>Failed to delete template.</p>")
            return message, refresh_templates()
        
        def clear_fields():
            return [""] * 5  # Clear all 5 fields

        save_btn.click(
            save_template_action,
            inputs=[t_name, t_type, t_subject, t_body],
            outputs=[templates_list]
        )
        update_btn.click(
            update_template_action,
            inputs=[t_id, t_name, t_type, t_subject, t_body],
            outputs=[templates_list]
        )
        delete_btn.click(
            delete_template_action,
            inputs=[t_id],
            outputs=[templates_list]
        )
        clear_btn.click(clear_fields, outputs=[t_name, t_type, t_subject, t_body, t_id])
        templates_list.select(
            load_template,
            inputs=[t_name, t_type, t_subject, t_body, t_id],
            outputs=[t_name, t_type, t_subject, t_body, t_id]
        )
        
        # Refresh templates on component creation
        templates_list.value = refresh_templates()
        
    # Return a dictionary containing the block and required components/functions
    return {
        "block": email_actions_block,
        "templates_list": templates_list,
        "t_name": t_name,
        "t_type": t_type,
        "t_subject": t_subject,
        "t_body": t_body,
        "t_id": t_id,
        "refresh_templates": refresh_templates,
        "load_template": load_template,
        # Add other components or functions you need to access
    }