Modularize code pieces

.gitignore

@@ -3,3 +3,18 @@
 
 # Claude Code local settings
 .claude/settings.local.json
+
+# Python bytecode and cache
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+
+# Backup files
+*.backup
+*.backup2
+*~
+.*.swp
+.*.swo
+.legacy_backup/

autoload/chatgpt.vim

@@ -0,0 +1,120 @@
+" ChatGPT Autoload Core Functions
+" This file contains the main API functions for the ChatGPT plugin
+
+" Main ChatGPT function - delegates to Python
+function! chatgpt#chat(prompt) abort
+  " Ensure suppress_display is off for normal chat operations
+  if !exists('g:chat_gpt_suppress_display')
+    let g:chat_gpt_suppress_display = 0
+  endif
+
+  python3 << EOF
+import sys
+import vim
+import os
+
+# Add python3/chatgpt to Python path
+plugin_dir = vim.eval('expand("<sfile>:p:h:h")')
+python_path = os.path.join(plugin_dir, 'python3')
+if python_path not in sys.path:
+    sys.path.insert(0, python_path)
+
+# Import and call main chat function
+from chatgpt.core import chat_gpt
+chat_gpt(vim.eval('a:prompt'))
+EOF
+
+  " Check if summary needs updating after AI response completes
+  if !exists('g:chat_gpt_suppress_display') || g:chat_gpt_suppress_display == 0
+    call chatgpt#summary#check_and_update()
+  endif
+
+  " Ensure we're in the chat window at the bottom
+  if !exists('g:chat_gpt_suppress_display') || g:chat_gpt_suppress_display == 0
+    let chat_winnr = bufwinnr('gpt-persistent-session')
+    if chat_winnr != -1
+      execute chat_winnr . 'wincmd w'
+      normal! G
+      call cursor('$', 1)
+      redraw
+    endif
+  endif
+endfunction
+
+" Display ChatGPT responses in a buffer
+function! chatgpt#display_response(response, finish_reason, chat_gpt_session_id)
+  let response = a:response
+  let finish_reason = a:finish_reason
+  let chat_gpt_session_id = a:chat_gpt_session_id
+
+  if !bufexists(chat_gpt_session_id)
+    if g:chat_gpt_split_direction ==# 'vertical'
+      silent execute winwidth(0)/g:split_ratio.'vnew '. chat_gpt_session_id
+    else
+      silent execute winheight(0)/g:split_ratio.'new '. chat_gpt_session_id
+    endif
+    call setbufvar(chat_gpt_session_id, '&buftype', 'nofile')
+    call setbufvar(chat_gpt_session_id, '&bufhidden', 'hide')
+    call setbufvar(chat_gpt_session_id, '&swapfile', 0)
+    setlocal modifiable
+    setlocal wrap
+    setlocal linebreak
+    call setbufvar(chat_gpt_session_id, '&ft', 'markdown')
+    call setbufvar(chat_gpt_session_id, '&syntax', 'markdown')
+  endif
+
+  if bufwinnr(chat_gpt_session_id) == -1
+    if g:chat_gpt_split_direction ==# 'vertical'
+      execute winwidth(0)/g:split_ratio.'vsplit ' . chat_gpt_session_id
+    else
+      execute winheight(0)/g:split_ratio.'split ' . chat_gpt_session_id
+    endif
+  endif
+
+  let last_lines = getbufline(chat_gpt_session_id, '$')
+  let last_line = empty(last_lines) ? '' : last_lines[-1]
+
+  let new_lines = substitute(last_line . response, '\n', '\r\n\r', 'g')
+  let lines = split(new_lines, '\n')
+
+  let clean_lines = []
+  for line in lines
+    call add(clean_lines, substitute(line, '\r', '', 'g'))
+  endfor
+
+  call setbufline(chat_gpt_session_id, '$', clean_lines)
+
+  " Switch to chat window and scroll to bottom
+  let chat_winnr = bufwinnr(chat_gpt_session_id)
+  if chat_winnr != -1
+    let current_win = winnr()
+    execute chat_winnr . 'wincmd w'
+    normal! G
+    call cursor('$', 1)
+    execute "normal! \<C-E>\<C-Y>"
+    redraw
+  endif
+
+  " Save to history file if this is a persistent session
+  if chat_gpt_session_id ==# 'gpt-persistent-session' && response != ''
+    python3 << EOF
+import vim
+import sys
+import os
+
+plugin_dir = vim.eval('expand("<sfile>:p:h:h")')
+python_path = os.path.join(plugin_dir, 'python3')
+if python_path not in sys.path:
+    sys.path.insert(0, python_path)
+
+from chatgpt.utils import save_to_history
+response = vim.eval('a:response')
+save_to_history(response)
+EOF
+  endif
+endfunction
+
+" Helper function to capitalize strings
+function! chatgpt#capitalize(str)
+    return toupper(strpart(a:str, 0, 1)) . tolower(strpart(a:str, 1))
+endfunction

autoload/chatgpt/commit.vim

@@ -0,0 +1,15 @@
+" ChatGPT Git Commit Generation
+" This file handles AI-assisted commit message generation
+
+" Generate a commit message using git integration
+function! chatgpt#commit#generate() abort
+  let prompt = 'Please help me create a git commit message.'
+  let prompt .= "\n\nThe goal is to:"
+  let prompt .= "\n- Check the repository status"
+  let prompt .= "\n- Review the changes that will be committed"
+  let prompt .= "\n- Draft an appropriate commit message following conventional commit format"
+  let prompt .= "\n- Create the commit"
+  let prompt .= "\n\nIf there are no staged changes, ask if I want to stage files first."
+
+  call chatgpt#chat(prompt)
+endfunction

autoload/chatgpt/config.vim

@@ -0,0 +1,138 @@
+" ChatGPT Configuration Management
+" This file handles default configuration values
+
+function! chatgpt#config#setup() abort
+  " Set default values for Vim variables if they don't exist
+  if !exists("g:chat_gpt_max_tokens")
+    let g:chat_gpt_max_tokens = 2000
+  endif
+
+  if !exists("g:chat_gpt_temperature")
+    let g:chat_gpt_temperature = 0.7
+  endif
+
+  if !exists("g:chat_gpt_model")
+    let g:chat_gpt_model = 'gpt-4o'
+  endif
+
+  if !exists("g:chat_gpt_lang")
+    let g:chat_gpt_lang = v:none
+  endif
+
+  if !exists("g:chat_gpt_split_direction")
+    let g:chat_gpt_split_direction = 'vertical'
+  endif
+
+  if !exists("g:split_ratio")
+    let g:split_ratio = 3
+  endif
+
+  if !exists("g:chat_persona")
+    let g:chat_persona = 'default'
+  endif
+
+  " Enable tools/function calling (default: enabled for supported providers)
+  if !exists("g:chat_gpt_enable_tools")
+    let g:chat_gpt_enable_tools = 1
+  endif
+
+  " Require plan approval before tool execution
+  if !exists("g:chat_gpt_require_plan_approval")
+    let g:chat_gpt_require_plan_approval = 1
+  endif
+
+  " Session mode (persistent chat history)
+  if !exists("g:chat_gpt_session_mode")
+    let g:chat_gpt_session_mode = 1
+  endif
+
+  " Conversation history compaction settings
+  if !exists("g:chat_gpt_summary_compaction_size")
+    let g:chat_gpt_summary_compaction_size = 76800  " 76KB
+  endif
+
+  if !exists("g:chat_gpt_recent_history_size")
+    let g:chat_gpt_recent_history_size = 30480  " 30KB
+  endif
+
+  " Provider selection
+  if !exists("g:chat_gpt_provider")
+    let g:chat_gpt_provider = 'openai'
+  endif
+
+  " Anthropic (Claude) configuration
+  if !exists("g:anthropic_api_key")
+    let g:anthropic_api_key = ''
+  endif
+
+  if !exists("g:anthropic_model")
+    let g:anthropic_model = 'claude-sonnet-4-5-20250929'
+  endif
+
+  if !exists("g:anthropic_base_url")
+    let g:anthropic_base_url = 'https://api.anthropic.com/v1'
+  endif
+
+  " Gemini (Google) configuration
+  if !exists("g:gemini_api_key")
+    let g:gemini_api_key = ''
+  endif
+
+  if !exists("g:gemini_model")
+    let g:gemini_model = 'gemini-2.5-flash'
+  endif
+
+  " Ollama configuration
+  if !exists("g:ollama_base_url")
+    let g:ollama_base_url = 'http://localhost:11434'
+  endif
+
+  if !exists("g:ollama_model")
+    let g:ollama_model = 'llama3.2'
+  endif
+
+  " OpenRouter configuration
+  if !exists("g:openrouter_api_key")
+    let g:openrouter_api_key = ''
+  endif
+
+  if !exists("g:openrouter_model")
+    let g:openrouter_model = 'anthropic/claude-3.5-sonnet'
+  endif
+
+  if !exists("g:openrouter_base_url")
+    let g:openrouter_base_url = 'https://openrouter.ai/api/v1'
+  endif
+
+  " Debug logging level (0=off, 1=basic, 2=verbose)
+  if !exists("g:chat_gpt_log_level")
+    let g:chat_gpt_log_level = 0
+  endif
+
+  " Prompt templates
+  let code_wrapper_snippet = "Given the following code snippet: "
+  let g:prompt_templates = {
+  \ 'ask': '',
+  \ 'rewrite': 'Can you rewrite this more idiomatically? ' . code_wrapper_snippet,
+  \ 'review': 'Can you provide a code review? ' . code_wrapper_snippet,
+  \ 'document': 'Return documentation following language pattern conventions. ' . code_wrapper_snippet,
+  \ 'explain': 'Can you explain how this works? ' . code_wrapper_snippet,
+  \ 'test': 'Can you write a test? ' . code_wrapper_snippet,
+  \ 'fix':  'I have an error I need you to fix. ' . code_wrapper_snippet,
+  \}
+
+  if exists('g:chat_gpt_custom_prompts')
+    call extend(g:prompt_templates, g:chat_gpt_custom_prompts)
+  endif
+
+  let g:promptKeys = keys(g:prompt_templates)
+
+  " Personas
+  let g:gpt_personas = {
+  \ "default": 'You are a helpful expert programmer we are working together to solve complex coding challenges, and I need your help. Please make sure to wrap all code blocks in ``` annotate the programming language you are using.',
+  \}
+
+  if exists('g:chat_gpt_custom_persona')
+    call extend(g:gpt_personas, g:chat_gpt_custom_persona)
+  endif
+endfunction