app.py

import streamlit as st
import pandas as pd
from appStore.prep_data import process_giz_worldwide
from appStore.prep_utils import create_documents, get_client
from appStore.embed import hybrid_embed_chunks
from appStore.search import hybrid_search
from appStore.region_utils import load_region_data, get_country_name
from appStore.tfidf_extraction import extract_top_keywords 
from torch import cuda
import json
from datetime import datetime

# get the device to be used eithe gpu or cpu
device = 'cuda' if cuda.is_available() else 'cpu'


st.set_page_config(page_title="SEARCH IATI",layout='wide')
st.title("GIZ Project Database")
var = st.text_input("Enter Search Query")

# Load the region lookup CSV
region_lookup_path = "docStore/regions_lookup.csv"
region_df = load_region_data(region_lookup_path)

####################  Create the embeddings collection and save ######################
# the steps below need to be performed only once and then commented out any unnecssary compute over-run
##### First we process and create the chunks for relvant data source
#chunks = process_giz_worldwide()
##### Convert to langchain documents
#temp_doc = create_documents(chunks,'chunks')
##### Embed and store docs, check if collection exist then you need to update the collection
collection_name = "giz_worldwide"
#hybrid_embed_chunks(docs= temp_doc, collection_name = collection_name)

################### Hybrid Search ######################################################
client = get_client()
print(client.get_collections())

# Fetch unique country codes and map to country names
@st.cache_data
def get_country_name_mapping(_client, collection_name, region_df):
    results = hybrid_search(_client, "", collection_name)
    country_set = set()
    for res in results[0] + results[1]:
        countries = res.payload.get('metadata', {}).get('countries', "[]")
        try:
            country_list = json.loads(countries.replace("'", '"'))
            # ADD: only add codes of length 2
            two_digit_codes = [code.upper() for code in country_list if len(code) == 2]
            country_set.update(two_digit_codes)
        except json.JSONDecodeError:
            pass
    
    # Create a mapping of {CountryName -> ISO2Code} 
    # so you can display the name in the selectbox but store the 2-digit code
    country_name_to_code = {}
    for code in country_set:
        name = get_country_name(code, region_df)
        country_name_to_code[name] = code

    return country_name_to_code


# Get country name mapping
client = get_client()
country_name_mapping = get_country_name_mapping(client, collection_name, region_df)
unique_country_names = sorted(country_name_mapping.keys())  # List of country names

# Layout filters in columns
col1, col2, col3 = st.columns([1, 1, 4])

with col1:
    country_filter = st.selectbox("Country", ["All/Not allocated"] + unique_country_names)  # Display country names
with col2:
    current_year = datetime.now().year
    default_start_year = current_year - 5  # Default to 5 years ago
    
    end_year_range = st.slider(
        "Project End Year",
        min_value=2010,
        max_value=2030,
        value=(default_start_year, current_year)
    )

# Checkbox to control whether to show only exact matches
show_exact_matches = st.checkbox("Show only exact matches", value=False)

def filter_results(results, country_filter, end_year_range):
    filtered = []
    for r in results:
        metadata = r.payload.get('metadata', {})
        countries = metadata.get('countries', "[]")
        end_year_val = float(metadata.get('end_year', 0))

        # Convert countries to a list
        try:
            c_list = json.loads(countries.replace("'", '"'))
            c_list = [code.upper() for code in c_list if len(code) == 2]
        except json.JSONDecodeError:
            c_list = []

        # Translate selected country name to iso2
        selected_iso_code = country_name_mapping.get(country_filter, None)

        # Filtering
        if (
            (country_filter == "All/Not allocated" or selected_iso_code in c_list)
            and (end_year_range[0] <= end_year_val <= end_year_range[1])
        ):
            filtered.append(r)
    return filtered


if button:
    # 1) Use a bigger limit so we get more than 10 results
    #    We'll filter them first, then slice the top 10 from the filtered set.
    results = hybrid_search(client, var, collection_name, limit=100)  # e.g., 100 or 200

    # results is a tuple: (semantic_results, lexical_results)
    semantic_all = results[0]
    lexical_all = results[1]

    # 2) Filter the entire sets
    filtered_semantic = filter_results(semantic_all, country_filter, end_year_range)
    filtered_lexical = filter_results(lexical_all, country_filter, end_year_range)

    # 3) Now we take the top 10 *after* filtering
    # Check user preference
    if show_exact_matches:
        st.write(f"Showing **Top 10 Lexical Search results** for query: {var}")
        # Show the top 10 from filtered_lexical
        for res in filtered_lexical[:10]:
            project_name = res.payload['metadata'].get('project_name', 'Project Link')
            url = res.payload['metadata'].get('url', '#')
            st.markdown(f"#### [{project_name}]({url})")

            # Snippet logic (80 words)
            full_text = res.payload['page_content']
            words = full_text.split()
            preview_word_count = 80
            preview_text = " ".join(words[:preview_word_count])
            remainder_text = " ".join(words[preview_word_count:])
            st.write(preview_text + ("..." if remainder_text else ""))

            # Keywords
            top_keywords = extract_top_keywords(full_text, top_n=5)
            if top_keywords:
                st.markdown(f"_{' · '.join(top_keywords)}_")

            # Metadata
            metadata = res.payload.get('metadata', {})
            countries = metadata.get('countries', "[]")
            client_name = metadata.get('client', 'Unknown Client')
            start_year = metadata.get('start_year', None)
            end_year_ = metadata.get('end_year', None)

            try:
                c_list = json.loads(countries.replace("'", '"'))
                country_names = [get_country_name(code.upper(), region_df) for code in c_list if len(code) == 2]
            except json.JSONDecodeError:
                country_names = []

            start_year_str = f"{int(round(float(start_year)))}" if start_year else "Unknown"
            end_year_str = f"{int(round(float(end_year_)))}" if end_year_ else "Unknown"

            additional_text = (
                f"**{', '.join(country_names)}**, commissioned by **{client_name}**, **{start_year_str}-{end_year_str}**"
            )
            st.markdown(additional_text)
            st.divider()
    else:
        st.write(f"Showing **Top 10 Semantic Search results** for query: {var}")
        # Show the top 10 from filtered_semantic
        for res in filtered_semantic[:10]:
            project_name = res.payload['metadata'].get('project_name', 'Project Link')
            url = res.payload['metadata'].get('url', '#')
            st.markdown(f"#### [{project_name}]({url})")

            # Snippet logic
            full_text = res.payload['page_content']
            words = full_text.split()
            preview_word_count = 80
            preview_text = " ".join(words[:preview_word_count])
            remainder_text = " ".join(words[preview_word_count:])
            st.write(preview_text + ("..." if remainder_text else ""))

            # Keywords
            top_keywords = extract_top_keywords(full_text, top_n=5)
            if top_keywords:
                st.markdown(f"_{' · '.join(top_keywords)}_")

            # Metadata
            metadata = res.payload.get('metadata', {})
            countries = metadata.get('countries', "[]")
            client_name = metadata.get('client', 'Unknown Client')
            start_year = metadata.get('start_year', None)
            end_year_ = metadata.get('end_year', None)

            try:
                c_list = json.loads(countries.replace("'", '"'))
                country_names = [get_country_name(code.upper(), region_df) for code in c_list if len(code) == 2]
            except json.JSONDecodeError:
                country_names = []

            start_year_str = f"{int(round(float(start_year)))}" if start_year else "Unknown"
            end_year_str = f"{int(round(float(end_year_)))}" if end_year_ else "Unknown"

            additional_text = (
                f"**{', '.join(country_names)}**, commissioned by **{client_name}**, **{start_year_str}-{end_year_str}**"
            )
            st.markdown(additional_text)
            st.divider()


    #  for i in results: 
    #      st.subheader(str(i.metadata['id'])+":"+str(i.metadata['title_main']))
    #      st.caption(f"Status:{str(i.metadata['status'])}, Country:{str(i.metadata['country_name'])}")
    #      st.write(i.page_content)
    #      st.divider()