import streamlit as st
import tempfile
import git
import os
from pathlib import Path
from datetime import datetime 
from config.settings import Settings
from core.file_scanner import FileScanner, FileInfo
from services.llm_service import LLMService
from typing import List, Set
from main import DirectoryStructureScanner, MarkdownGenerator

class StreamlitFileWriter:
    def __init__(self, output_file: Path):
        self.output_file = output_file
    
    def create_markdown(self, files: List[FileInfo]) -> str:
        content = []
        for file_info in files:
            content.append(f"## {file_info.path}")
            content.append("------------")
            if file_info.content is not None:
                content.append(file_info.content)
            else:
                content.append("# Failed to read content")
            content.append("\n")
        return "\n".join(content)

st.set_page_config(
   page_title="Repository Code Analysis",
   page_icon="🔍",
   layout="wide"
)

st.markdown("""
<style>
    .stApp {
        background-color: #0e1117;
        color: #ffffff;
    }
    .chat-message {
        padding: 1rem;
        margin: 1rem 0;
        border-radius: 0.5rem;
    }
    .assistant-message {
        background-color: #1e2329;
        color: #ffffff;
    }
    .directory-structure {
        font-family: monospace;
        white-space: pre;
        background-color: #1e2329;
        padding: 1rem;
        border-radius: 0.5rem;
        margin: 1rem 0;
    }
    .markdown-preview {
        background-color: #1e2329;
        padding: 1rem;
        border-radius: 0.5rem;
        margin: 1rem 0;
        max-height: 500px;
        overflow-y: auto;
    }
</style>
""", unsafe_allow_html=True)

# セッション状態の初期化
if 'repo_content' not in st.session_state:
    st.session_state.repo_content = None
if 'directory_structure' not in st.session_state:
    st.session_state.directory_structure = None
if 'content_md' not in st.session_state:
    st.session_state.content_md = None
if 'structure_md' not in st.session_state:
    st.session_state.structure_md = None
if 'temp_dir' not in st.session_state:
    st.session_state.temp_dir = None
if 'llm_service' not in st.session_state:
    try:
        api_key = os.getenv("ANTHROPIC_API_KEY")
        if not api_key:
            st.error("ANTHROPIC_API_KEY環境変数が設定されていません")
            st.stop()
        st.session_state.llm_service = LLMService(api_key)
    except Exception as e:
        st.error(str(e))
        st.stop()

st.title("🔍 リポジトリ解析・質問システム")

with st.sidebar:
    st.subheader("📌 使い方")
    st.markdown("""
    1. GitHubリポジトリのURLを入力
    2. スキャンを実行
    3. ディレクトリ構造と内容を確認
    4. Markdownファイルをダウンロード
    5. コードについて質問
    """)

repo_url = st.text_input(
   "GitHubリポジトリのURLを入力",
   placeholder="https://github.com/username/repository.git"
)

if st.button("スキャン開始", disabled=not repo_url):
    try:
        with st.spinner('リポジトリを解析中...'):
            generator = MarkdownGenerator(repo_url)
            content_md, structure_md, files = generator.generate_markdowns()
            
            writer = StreamlitFileWriter(Path("dummy"))
            formatted_content = writer.create_markdown(files)
            
            st.session_state.content_md = formatted_content
            st.session_state.structure_md = structure_md
            st.session_state.repo_content = LLMService.format_code_content(files)
            
        st.success(f"スキャン完了: {len(files)}個のファイルを検出")
        
        st.session_state.llm_service.clear_history()
        
    except Exception as e:
        st.error(f"エラーが発生しました: {str(e)}")

if st.session_state.structure_md and st.session_state.content_md:
    tab1, tab2 = st.tabs(["📁 ディレクトリ構造", "📄 ファイル内容"])
    
    with tab1:
        st.markdown(f'<div class="markdown-preview">{st.session_state.structure_md}</div>', 
                   unsafe_allow_html=True)
        
        st.download_button(
            label="ディレクトリ構造をダウンロード",
            data=st.session_state.structure_md,
            file_name=f"directory_structure_{datetime.now().strftime('%Y%m%d_%H%M%S')}.md",
            mime="text/markdown"
        )
    
    with tab2:
        st.markdown(f'<div class="markdown-preview">{st.session_state.content_md}</div>', 
                   unsafe_allow_html=True)
        
        st.download_button(
            label="ファイル内容をダウンロード",
            data=st.session_state.content_md,
            file_name=f"repository_content_{datetime.now().strftime('%Y%m%d_%H%M%S')}.md",
            mime="text/markdown"
        )

if st.session_state.repo_content:
    st.divider()
    st.subheader("💭 コードについて質問する")
    
    for message in st.session_state.llm_service.conversation_history:
        if message.role == "assistant":
            st.markdown(f'<div class="chat-message assistant-message">{message.content}</div>', 
                       unsafe_allow_html=True)
    
    query = st.text_area(
        "質問を入力してください",
        placeholder="例: このコードの主な機能は何ですか？"
    )
    
    col1, col2 = st.columns([1, 5])
    with col1:
        if st.button("履歴クリア"):
            st.session_state.llm_service.clear_history()
            st.rerun()
    
    with col2:
        if st.button("質問する", disabled=not query):
            with st.spinner('回答を生成中...'):
                response, error = st.session_state.llm_service.get_response(
                    st.session_state.repo_content,
                    query
                )
                
                if error:
                    st.error(error)
                else:
                    st.rerun()