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Hardik Sankhla
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backend/README.md
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backend/README.md
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# 🧠 AI-Powered Schedule and Task Planning Backend
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This repository contains the backend service for an intelligent schedule and task planning application. It leverages a **Large Language Model (LLM)** (currently using **Qwen1.5–4B via Ollama**) to transform natural language tasks with complex recurrence rules into structured, conflict-free daily schedules.
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---
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## ✨ Features
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- **Intelligent Scheduling**: Uses a powerful LLM to understand and structure time-bound tasks.
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- **Flexible Task Input**: Supports daily, weekly, monthly recurrence with specific time rules.
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- **Advanced Recurrence Handling**: Supports “every 2nd Saturday” or “last Monday of month”.
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- **Structured JSON Output**: Returns clean machine-readable schedules.
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- **Pluggable LLM Backend**: Switch between Ollama, HuggingFace, or any generic API.
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- **FastAPI + Swagger UI**: For live API testing and documentation.
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- **Dockerized**: Easily run the entire system with Docker Compose.
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---
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## 🚀 Technologies Used
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- **FastAPI** – high-performance API framework
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- **Pydantic** – data validation & schema
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- **HTTPLX** – async HTTP client for LLM
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- **Ollama** – running Qwen1.5–4B locally
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- **Docker + Compose** – containerization
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- **Python 3.10+**
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---
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## 📂 Project Structure
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```bash
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backend/
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├── main.py # FastAPI entry point
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├── requirements.txt # Python dependencies
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├── Dockerfile # Docker image config
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├── docker-compose.yml # Docker orchestration
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├── .env # Runtime config
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└── app/
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├── models/
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│ └── task.py # Task schemas
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├── api/
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│ └── endpoints.py # FastAPI endpoints
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└── services/
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└── llm_service.py # LLM interaction layer
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```
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---
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## 🔧 Configuration
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`.env` example:
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```env
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FRONTEND_URL=http://localhost:3000
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LLM_PROVIDER=OLLAMA
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OLLAMA_MODEL_NAME=qwen:4b
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OLLAMA_API_URL=http://localhost:11434/api/generate
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```
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---
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## 📅 Weekly Task Schedule Visualization (Sample Week: July 14–20, 2025)
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| Time | Mon (14) | Tue (15) | Wed (16) | Thu (17) | Fri (18) | Sat (19) | Sun (20) |
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|--------------|----------------------------------|----------------------------------|----------------------------------|----------------------------------|----------------------------------|----------------------------------|----------------------------------|
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| 06:00–07:00 | 🟢 🧘 Workout (Flexible) | 🟢 🧘 Workout (Flexible) | 🟢 🧘 Workout (Flexible) | 🟢 🧘 Workout (Flexible) | 🟢 🧘 Workout (Flexible) | 🟢 🧘 Workout (Flexible) | 🟢 🧘 Workout (Flexible) |
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| 07:00–08:00 | ⭐ 🧘 Workout (Preferred) | ⭐ 🧘 Workout (Preferred) | ⭐ 🧘 Workout (Preferred) | ⭐ 🧘 Workout (Preferred) | ⭐ 🧘 Workout (Preferred) | ⭐ 🧘 Workout (Preferred) | ⭐ 🧘 Workout (Preferred) |
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| 08:30–09:00 | ☕ Coffee Break | ☕ Coffee Break | ☕ Coffee Break | ☕ Coffee Break | ☕ Coffee Break | | |
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| 09:00–09:15 | 🔒 ⚠️ Stand-up + Scrum 🎯 | 🔒 ⚠️ Stand-up + Scrum 🎯 | 🔒 ⚠️ Stand-up + Scrum 🎯 | 🔒 ⚠️ Stand-up + Scrum 🎯 | 🔒 ⚠️ Stand-up + Scrum 🎯 | | |
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| 09:15–10:00 | ⚠️ Scrum Continues 🎯 | ⚠️ Scrum Continues 🎯 | ⚠️ Scrum Continues 🎯 | ⚠️ Scrum Continues 🎯 | ⚠️ Scrum Continues 🎯 | | |
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| 10:00–11:00 | 🟢 Flex / Board Review | 🔒 🧑💼 Exec Meeting | 🟢 Financial Reporting | 🔒 🧑💼 Deep Code Review | 🟢 🎯 Team Activity | | |
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| 11:00–12:00 | 🟢 Report Prep ⭐ | 🟢 Report Prep ⭐ | 🟢 Code Review / Reporting | 🔒 Code Finalization 🧑💼 | 🟢 🎯 Team Activity Cont. | 🔒 🧘 HR Audit (2nd Sat) | |
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| 12:00–13:00 | 🍽 Lunch | 🍽 Lunch | 🍽 Lunch | 🍽 Lunch | 🍽 Lunch | 🍽 Lunch | 🍽 Lunch |
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| 13:00–14:00 | ⭐ Board Meeting Prep | ⭐ Board Meeting Prep | ⭐ Board Meeting Prep | 🟢 Buffer | 🟢 Buffer | 🟢 Flex Task | 🟢 Flex Task |
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| 14:00–17:00 | 🟢 Deep Work Block | 🟢 Deep Work | 🟢 Deep Work | 🟢 Deep Work | 🟢 Deep Work | 🟢 Flex Time | 🟢 Flex Time |
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| 18:00–19:00 | 🧘 Workout (Fallback) | 🧘 Workout (Fallback) | 🧘 Workout (Fallback) | 🧘 Workout (Fallback) | 🧘 Workout (Fallback) | 🧘 Workout (Fallback) | 🧘 Workout (Fallback) |
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| 21:00–22:00 | 🧘 Wind-down | 🧘 Wind-down | 🧘 Wind-down | 🧘 Wind-down | 🧘 Wind-down | 🧘 Wind-down | 🧘 Wind-down |
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**Legend**:
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🔒 Fixed • ⚠️ Conflict • ⭐ Preferred • 🟢 Flexible • 🧘 Personal • 🧑💼 Work • 🎯 High Impact
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---
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## 📬 API Endpoint: `/api/v1/schedule/tasks`
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**POST Request** with list of tasks → returns intelligent JSON schedule.
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Example input:
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```json
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[
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{
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"type": "daily",
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"task_name": "Daily Stand-up",
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"task_description": "Critical morning sync.",
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"time_settings": {
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"start_time": "09:00",
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"end_time": "09:15"
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},
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"category": "work",
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"repeat_on_1": "Every weekday",
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"repeat_on_2": ["M", "T", "W", "T", "F"],
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"reminder_on": {
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"is_active": true,
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"numeric_input": 10,
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"time_unit": "Minutes"
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}
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}
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]
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```
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Example output:
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```json
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{
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"scheduled_tasks": [
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{
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"task_name": "Daily Stand-up",
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"date": "2025-07-14",
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"start_time": "09:00",
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"end_time": "09:15",
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"category": "work",
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"original_task_id": "task1"
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}
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]
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}
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```
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---
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## 🧪 Testing
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### Swagger UI
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Visit: `http://localhost:8000/docs` → Try `/api/v1/schedule/tasks`
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### Curl
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```bash
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curl -X POST http://localhost:8000/api/v1/schedule/tasks \
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-H "Content-Type: application/json" \
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-d '[{"type":"daily", "task_name":"Daily Stand-up", "task_description":"Sync","time_settings":{"start_time":"09:00","end_time":"09:15"},"category":"work","repeat_on_1":"Every weekday","repeat_on_2":["M","T","W","T","F"],"reminder_on":{"is_active":true,"numeric_input":10,"time_unit":"Minutes"}}]'
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```
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---
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## ⚙️ LLM Configuration
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**Current Provider**: `OLLAMA`
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**Model Used**: `qwen:4b`
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**API URL**: `http://localhost:11434/api/generate`
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Switch to `HUGGINGFACE` or `GENERIC_API` by editing `.env`.
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---
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## 🧠 Troubleshooting
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- **422 Unprocessable Entity**: Add fallback logic in `llm_service.py` for null times.
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- **500 Server Error**: LLM may not be running or wrong model name.
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- **Fix Conflicts**: Use better prompts or larger models for conflict resolution.
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---
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## 💡 Future Enhancements
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- Conflict resolver + dependency chains
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- User sessions & database storage
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- Calendar frontend (React)
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- Notification/reminders
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- Team role scheduling
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---
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## 📄 License
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MIT License – See `LICENSE` file.
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