app.py

import streamlit as st
import pandas as pd
from appStore.prep_data import process_giz_worldwide, remove_duplicates, get_max_end_year
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, get_regions
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 (PROTOTYPE)")
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())

# Get the maximum end_year across the entire collection
max_end_year = get_max_end_year(client, collection_name)

# Get all unique sub-regions
_, unique_sub_regions = get_regions(region_df)

# Fetch unique country codes and map to country names
@st.cache_data
def get_country_name_and_region_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("'", '"'))
            # 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} and {ISO2Code -> SubRegion}
    country_name_to_code = {}
    iso_code_to_sub_region = {}

    for code in country_set:
        name = get_country_name(code, region_df)
        sub_region_row = region_df[region_df['alpha-2'] == code]
        sub_region = sub_region_row['sub-region'].values[0] if not sub_region_row.empty else "Not allocated"
        country_name_to_code[name] = code
        iso_code_to_sub_region[code] = sub_region

    return country_name_to_code, iso_code_to_sub_region

# Get country name and region mappings
client = get_client()
country_name_mapping, iso_code_to_sub_region = get_country_name_and_region_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, col4 = st.columns([1, 1, 1, 4])

# Region filter
with col1:
    region_filter = st.selectbox("Region", ["All/Not allocated"] + sorted(unique_sub_regions))  # Display region names

# Dynamically filter countries based on selected region
if region_filter == "All/Not allocated":
    filtered_country_names = unique_country_names  # Show all countries if no region is selected
else:
    filtered_country_names = [
        name for name, code in country_name_mapping.items() if iso_code_to_sub_region.get(code) == region_filter
    ]

# Country filter
with col2:
    country_filter = st.selectbox("Country", ["All/Not allocated"] + filtered_country_names)  # Display filtered country names

# Year range slider
with col3:
    current_year = datetime.now().year
    default_start_year = current_year - 5

    # 3) The max_value is now the actual max end_year from collection
    end_year_range = st.slider(
        "Project End Year",
        min_value=2010,
        max_value=max_end_year,
        value=(default_start_year, max_end_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, region_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)

        # Check if any country in the metadata matches the selected region
        if region_filter != "All/Not allocated":
            countries_in_region = [code for code in c_list if iso_code_to_sub_region.get(code) == region_filter]
        else:
            countries_in_region = c_list

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

# Run the search 

# 1) Adjust limit so we get more than 15 results
results = hybrid_search(client, var, collection_name, limit=500)  # e.g., 100 or 200

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

# 2) Filter out content < 20 chars (as intermediate fix to problem that e.g. super short paragraphs with few chars get high similarity score)
semantic_all = [
    r for r in semantic_all if len(r.payload["page_content"]) >= 70
]
lexical_all = [
    r for r in lexical_all if len(r.payload["page_content"]) >= 70
]

# 2) Apply a threshold to SEMANTIC results (score >= 0.4)
semantic_thresholded = [r for r in semantic_all if r.score >= 0.4]

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

filtered_semantic_no_dupe = remove_duplicates(filtered_semantic)
filtered_lexical_no_dupe = remove_duplicates(filtered_lexical)


# 3) Retrieve top 15 *after* filtering
# Check user preference
if show_exact_matches:
    # 1) Display heading
    st.write(f"Showing **Top 15 Lexical Search results** for query: {var}")

    # 2) Do a simple substring check (case-insensitive)
    #    We'll create a new list lexical_substring_filtered
    query_substring = var.strip().lower()
    lexical_substring_filtered = []
    for r in lexical_all:
        # page_content in lowercase
        page_text_lower = r.payload["page_content"].lower()
        # Keep this result only if the query substring is found
        if query_substring in page_text_lower:
            lexical_substring_filtered.append(r)

    # 3) Now apply your region/country/year filter on that new list
    filtered_lexical = filter_results(
        lexical_substring_filtered, country_filter, region_filter, end_year_range
    )

    # 4) Remove duplicates
    filtered_lexical_no_dupe = remove_duplicates(filtered_lexical)

    # 5) If empty after substring + filters + dedupe, show a custom message
    if not filtered_lexical_no_dupe:
        st.write('No exact matches, consider unchecking "Show only exact matches"')
    else:
        # 6) Display the first 15 matching results
        for res in filtered_lexical_no_dupe[:15]:
            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("'", '"'))
            except json.JSONDecodeError:
                c_list = []
            
            # Only keep country names if the region lookup (get_country_name) 
            # returns something different than the raw code.
            matched_countries = []
            for code in c_list:
                if len(code) == 2:
                    resolved_name = get_country_name(code.upper(), region_df)
                    # If get_country_name didn't find a match, 
                    # it typically just returns the same code (like "XX"). 
                    # We'll consider "successfully looked up" if 
                    # resolved_name != code.upper().
                    if resolved_name.upper() != code.upper():
                        matched_countries.append(resolved_name)
            
            # Format the year range
            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"
            
            # Build the final string
            if matched_countries:
                # We have at least 1 valid country name
                additional_text = (
                    f"**{', '.join(matched_countries)}**, commissioned by **{client_name}**, "
                    f"**{start_year_str}-{end_year_str}**"
                )
            else:
                # No valid countries found
                additional_text = (
                    f"Commissioned by **{client_name}**, **{start_year_str}-{end_year_str}**"
                )
            
            st.markdown(additional_text)
            st.divider()

else:
    st.write(f"Showing **Top 15 Semantic Search results** for query: {var}")
    
    if not filtered_semantic_no_dupe:
        st.write("No relevant results found.")
    else:
        # Show the top 15 from filtered_semantic
        for res in filtered_semantic_no_dupe[:15]:
            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("'", '"'))
            except json.JSONDecodeError:
                c_list = []
            
            # Only keep country names if the region lookup (get_country_name) 
            # returns something different than the raw code.
            matched_countries = []
            for code in c_list:
                if len(code) == 2:
                    resolved_name = get_country_name(code.upper(), region_df)
                    # If get_country_name didn't find a match, 
                    # it typically just returns the same code (like "XX"). 
                    # We'll consider "successfully looked up" if 
                    # resolved_name != code.upper().
                    if resolved_name.upper() != code.upper():
                        matched_countries.append(resolved_name)
            
            # Format the year range
            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"
            
            # Build the final string
            if matched_countries:
                # We have at least 1 valid country name
                additional_text = (
                    f"**{', '.join(matched_countries)}**, commissioned by **{client_name}**, "
                    f"**{start_year_str}-{end_year_str}**"
                )
            else:
                # No valid countries found
                additional_text = (
                    f"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()