import os
import streamlit as st
from mongodb import add_post,get_post_titles, get_post_by_id, update_post, delete_post
from dotenv import load_dotenv
load_dotenv()


USERNAME = os.getenv("_USERNAME_")
PASSWORD = os.getenv("_PASSWORD_")

print(USERNAME, PASSWORD)
def admin():

    # Create a placeholder for the password input field
    user_placeholder = st.empty()
    password_placeholder = st.empty()

    # Show password input if it's not already correct
    username = user_placeholder.text_input("Enter Username")
    password = password_placeholder.text_input("Enter Password", type="password")

    # Check if the password is correct
    if password == PASSWORD and username == USERNAME:
        password_placeholder.empty()  # Hide the password input
        user_placeholder.empty()  # Hide the password input

        tab1, tab2, tab3 = st.tabs(["Read Post", "Add Post", "Update & Delete Post"])

        with tab1:
            if st.session_state.get('selected_post_id', None):
                selected_post = get_post_by_id(st.session_state.selected_post_id)

                # Display the content of the selected post
                st.subheader(selected_post["title"])
                st.divider()
                st.markdown(selected_post["content"])  # Render the content as Markdown

        with tab2:
            st.subheader("Add a new Post")
            title = st.text_input("Post Title")

            # Text input area for Markdown content
            content = st.text_area("Post Content (Markdown supported)", height=800)

            status = st.selectbox("Status", ["private", "public", "achieve"], index=0)

            if st.button("Add Post"):
                if title and content:
                    res = add_post(title, content, status, username)
                    st.write(res)
                else:
                    st.error("Please fill both the title and content.")

        with tab3:

            show_status = st.sidebar.selectbox("Status", ["private", "public", "achieve"], index = 1)
            post_titles = list(get_post_titles(show_status))

            if post_titles:
                # Use session state to remember the selected post ID
                if "selected_post_id" not in st.session_state:
                    st.session_state.selected_post_id = None

                # Display titles as clickable buttons in the sidebar
                selected_post = None
                for post in post_titles:
                    # Check if the post is selected
                    if st.sidebar.button(post["title"], key=f"button_{post['_id']}"):
                        st.session_state.selected_post_id = post["_id"]

                # Only show the update section if a post is selected
                if st.session_state.selected_post_id:
                    post_id = st.session_state.selected_post_id
                    selected_post = get_post_by_id(post_id)

                    if selected_post:
                        # Display the content of the selected post
                        new_title = st.text_input("New Title", value=selected_post["title"])
                        new_content = st.text_area("New Content (Markdown supported)", value=selected_post["content"],
                                                   height=800)

                        options = ["private", "public", "achieve"]
                        new_status = st.selectbox("Status", options, index= options.index(selected_post['status']), key="status_update")
                        left, right = st.columns(2)

                        if left.button("Update Post", use_container_width=True, key=f"update_button_{post_id}"):
                            if new_title and new_content:
                                # Call the update_post function to save the changes to MongoDB
                                res = update_post(post_id, new_title, new_content, new_status)
                                st.success(res)  # Display the result from the update function
                                # Optionally, display updated content for the user to confirm the changes
                            else:
                                st.error("Please fill both the new title and content.")

                        # Permanent delete logic
                        delete_password = st.text_input("Password", type="password", key=f"delete_password_{post_id}")
                        delete_button = right.button("Permanent Delete Post", use_container_width=True,
                                                     key=f"delete_button_{post_id}")

                        if delete_button:
                            if delete_password == PASSWORD:
                                res = delete_post(post_id)
                                if res:
                                    st.success("Post deleted successfully!")
                                    st.session_state.selected_post_id = None  # Reset selected post after deletion
                                    post_titles = list(get_post_titles(show_status))  # Refresh the list of posts
                                else:
                                    st.error("An error occurred while deleting the post.")
                            elif delete_password:  # If password is filled but incorrect
                                st.error("Incorrect password.")
                    else:
                        st.error("Post not found.")
                else:
                    st.error("Please select a post first.")

            else:
                st.write("No posts available.")


    else:
        if password:  # If password is entered but incorrect
            st.error("Incorrect password. Please try again.")
        else:  # If no password is entered
            st.info("Please enter your Username & Password.")