Features/event generator (#1)

* setting up the generator

* poisson-poisson requests sampling

* Delete docker_fs/.env.dev

* Delete docker_fs/.env.test

* changes

* refactor for event generator

* added gaussian truncated generator and unit tests for helpers

* imprved documentantion and simulation time handling

* simulation start with the vent generator

* small refactor + tests for the generation of events

* minor changes

* Update src/app/schemas/simulation_input.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update tests/unit/sampler/test_sampler_helper.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update scripts/quality-check.sh

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update tests/integration/db_initialization/test_init_models.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* minor changes after PR review

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: GioeleB00

.github/workflows/ci-develop.yml

@@ -55,6 +55,8 @@ jobs:
 
       # Unit-tests only (exclude integration markers)
       - name: Run unit tests
+        env:
+         ENVIRONMENT: test
         run: poetry run pytest -m "not integration" --disable-warnings
 
 

.gitignore

@@ -30,6 +30,8 @@ pip-wheel-metadata/
 venv/
 ENV/
 env/
+docker_fs/.env
+docker_fs/.env.*
 
 # Poetry-specific
 .cache/pypoetry/

DEV_WORKFLOW_GUIDE.md documentation/DEV_WORKFLOW_GUIDE.mdDEV_WORKFLOW_GUIDE.md renamed to documentation/DEV_WORKFLOW_GUIDE.md

@@ -1,6 +1,6 @@
 # **Development Workflow & Architecture Guide**
 
-This document outlines the standardized development workflow, repository architecture, and branching strategy for this project. Adhering to these guidelines ensures consistency, maintainability, and a scalable development process.
+This document outlines the standardized development workflow, repository architecture, and branching strategy for the backend of the FastSim project. Adhering to these guidelines ensures consistency, maintainability, and a scalable development process.
 
 ## 1. Technology Stack
 
@@ -13,13 +13,7 @@ The project is built upon the following core technologies:
 -   **Caching**: Redis
 -   **Containerization**: Docker
 
-## 2. Architectural Overview: A Multi-Repo Strategy
-
-To promote scalability, team autonomy, and clear separation of concerns, this project adopts a **multi-repo architecture**. Each core component of the system resides in its own dedicated repository. This approach allows for independent development cycles, testing, and deployment.
-
-Our architecture is composed of three main repositories:
-
-### 2.1. Backend Service (`project-backend`)
+### 2.1. Backend Service (`FastSim-backend`)
 
 This repository contains all code related to the FastAPI backend service. Its primary responsibility is to handle business logic, interact with the database, and expose a RESTful API.
 
@@ -61,69 +55,6 @@ project-backend/
 *   To be testable in isolation.
 *   To produce a versioned Docker image (`backend:<tag>`) as its main artifact.
 
-### 2.2. Frontend Service (`project-frontend`)
-
-This repository contains all code for the React web application. Its responsibility is to provide the user interface and interact with the backend via its API.
-
-**Folder Structure:**
-```
-project-frontend/
-├── .github/
-│   └── workflows/
-│       └── main.yml           # CI: Tests and publishes the frontend Docker image
-├── public/                  # Static assets (index.html, favicon, etc.)
-├── src/                     # Application source code
-│   ├── api/                 # Functions for backend API calls
-│   ├── components/          # Reusable UI components
-│   ├── hooks/               # Custom React hooks
-│   ├── mocks/               # Service worker mocks for API (for isolated testing)
-│   ├── pages/               # Page components
-│   └── index.js             # React application entrypoint
-├── .env.example
-├── .gitignore
-├── docker-compose.yml       # Base local development definition
-├── Dockerfile               # Multi-stage build for a lean production image
-├── package.json
-├── package-lock.json
-└── README.md                # Setup instructions for the frontend service
-```
-
-**Key Responsibilities:**
-*   To be testable in isolation (using a mocked API).
-*   To produce a versioned, production-ready Docker image (`frontend:<tag>`), typically served by Nginx.
-
-### 2.3. Infrastructure & E2E Tests (`project-master`)
-
-This repository is the "glue" that holds the system together. It does not contain application code but rather the configuration to orchestrate, test, and deploy the entire system.
-
-**Folder Structure:**
-```
-project-master/
-├── .github/
-│   └── workflows/
-│       ├── e2e-tests.yml      # CI: Runs End-to-End tests on a complete stack
-│       └── deploy.yml         # CD: Handles deployment to environments
-├── e2e-tests/                 # End-to-End test suite (e.g., Cypress, Playwright)
-│   ├── cypress/               # Test code
-│   └── cypress.config.js
-├── environments/              # Environment-specific configurations
-│   ├── staging/
-│   │   ├── docker-compose.yml # Docker Compose file for the Staging environment
-│   │   └── .env.example
-│   └── production/
-│       ├── docker-compose.yml # Docker Compose file for the Production environment
-│       └── .env.example
-├── scripts/                   # Deployment and utility scripts
-│   ├── deploy-staging.sh
-│   └── deploy-prod.sh
-└── README.md                  # Main project README: explains the overall architecture
-```
-
-**Key Responsibilities:**
-*   To define the composition of services for each environment (Staging, Production).
-*   To run End-to-End tests that validate the integration between services.
-*   To manage the Continuous Deployment (CD) process.
-
 ## 3. Branching Strategy: Git Flow
 
 To manage code development and releases in a structured manner, we use the **Git Flow** branching model.

documentation/tests_documentation/integration_tests/test_sampler_helper.md

@@ -0,0 +1,50 @@
+Below is a guided walkthrough of **`tests/unit/simulation/test_sampler_helper.py`**, explaining core ideas and each test’s intent.
+
+---
+
+## File purpose
+
+This file verifies that your three helper functions—
+
+* `uniform_variable_generator`
+* `poisson_variable_generator`
+* `truncated_gaussian_generator`
+
+—correctly delegate to whatever RNG you pass in, and fall back to NumPy’s default RNG when you don’t provide one.
+
+---
+
+## Key testing patterns
+
+1. **Dependency injection via `rng`**
+   Each helper takes an `rng` parameter. In production you’ll pass a `np.random.Generator`; in tests we inject a **`DummyRNG`** with predictable outputs to make our tests **deterministic**.
+
+2. **Duck typing**
+   Python doesn’t require `rng` to be a specific class—only that it implements the required methods (`random()`, `poisson(mean)`, `normal(mean, sigma)`). Our `DummyRNG` simply implements those three methods.
+
+3. **`typing.cast` for static typing**
+   We wrap `DummyRNG` instances in `cast("np.random.Generator", DummyRNG(...))` so mypy sees them as satisfying the generator type, but at runtime they remain our dummy.
+
+---
+
+## Test-by-test breakdown
+
+| Test name                                                            | What it checks                                                                                                                  |
+| -------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------- |
+| **`test_uniform_variable_generator_with_dummy_rng`**                 | Passing a `DummyRNG(uniform_value=0.75)`, `rng.random()` returns 0.75 → helper must return exactly 0.75.                        |
+| **`test_uniform_variable_generator_default_rng_range`**              | Without supplying `rng`, the helper uses `default_rng()`. We call it 100× to ensure it always returns a `float` in \[0.0, 1.0). |
+| **`test_poisson_variable_generator_with_dummy_rng`**                 | With `DummyRNG(poisson_value=3)`, `rng.poisson(mean)` yields 3 → helper returns 3.                                              |
+| **`test_poisson_variable_generator_reproducible`**                   | Two NumPy generators created with the same seed (`12345`) must produce the same Poisson sample for `mean=10.0`.                 |
+| **`test_truncated_gaussian_generator_truncates_negative`**           | `DummyRNG(normal_value=-2.7)` forces a negative draw: helper must clamp it to **0**.                                            |
+| **`test_truncated_gaussian_generator_truncates_toward_zero`**        | `DummyRNG(normal_value=3.9)` forces a positive draw: helper must cast/round toward zero (int(3.9) → **3**).                     |
+| **`test_truncated_gaussian_generator_default_rng_non_negative_int`** | With a real seeded RNG, helper must produce **some** non-negative `int` (verifies default fallback path is valid).              |
+
+---
+
+## Why this matters
+
+* **Deterministic behavior**: by forcing the RNG’s output via `DummyRNG`, we can assert exactly how our helpers transform that value (clamping, rounding, type conversion).
+* **Fallbacks work**: tests with **no** `rng` verify that calling `default_rng()` still gives valid outputs of the correct type and range.
+* **Type safety**: using `cast(...)` silences mypy errors while still executing our dummy logic at runtime—ensuring we meet both static‐typing and functional correctness goals.
+
+With this suite, you have **full confidence** that your sampling helpers behave correctly under both controlled (dummy) and uncontrolled (default) RNG conditions.

documentation/tests_documentation/integration_tests/test_simulation_input.md

@@ -0,0 +1,93 @@
+Below an explanation for the unit tests in the file `tests/unit/simulation/test_simulation_input.py`
+
+### 1. `test_normal_sets_variance_to_mean`
+
+**Purpose:**
+Checks that when you create an `RVConfig` with `distribution="normal"` and omit the `variance` field, the model automatically sets `variance = mean`.
+
+* Verifies the “default variance” logic in the post‐init validator.
+
+---
+
+### 2. `test_poisson_keeps_variance_none`
+
+**Purpose:**
+Ensures that if you choose the Poisson distribution (`distribution="poisson"`) and do **not** supply a variance, the model **does not** fill in any default variance (keeps it `None`).
+
+* Confirms that defaulting only applies to “normal”/“gaussian,” not to Poisson.
+
+---
+
+### 3. `test_explicit_variance_is_preserved`
+
+**Purpose:**
+Validates that if you explicitly pass a `variance` value—even for a distribution that would normally default—it remains exactly what you provided, and is coerced to float.
+
+* Guards against accidental overwriting of user‐supplied variance.
+
+---
+
+### 4. `test_mean_must_be_numeric`
+
+**Purpose:**
+Verifies that giving a non‐numeric `mean` (e.g. a string) raises a `ValidationError` with our custom message `"mean must be a number"`.
+
+* Tests the “before” validator on the `mean` field for type checking and coercion.
+
+---
+
+### 5. `test_missing_mean_field`
+
+**Purpose:**
+Ensures that completely omitting the `mean` key triggers a standard “field required” error.
+
+* Confirms that `mean` is mandatory in the schema.
+
+---
+
+### 6. `test_gaussian_sets_variance_to_mean`
+
+**Purpose:**
+Exactly like the “normal” test above, but for `distribution="gaussian"`.
+
+* Demonstrates that “gaussian” is treated as an alias for “normal” in the default‐variance logic.
+
+---
+
+### 7. `test_default_distribution_is_poisson`
+
+**Purpose:**
+Checks two things simultaneously:
+
+1. When you omit `distribution`, it defaults to `"poisson"`.
+2. In that default‐poisson case, `variance` remains `None`.
+
+* Validates both the default distribution and its variance behavior in one test.
+
+---
+
+### 8. `test_explicit_variance_kept_for_poisson`
+
+**Purpose:**
+Confirms that even if you supply a `variance` when `distribution="poisson"`, the model preserves it rather than discarding it or forcing it back to `None`.
+
+* Provides symmetry to the “explicit variance” test for non‐Poisson cases.
+
+---
+
+### 9. `test_invalid_distribution_raises`
+
+**Purpose:**
+Ensures that passing a value for `distribution` outside of the allowed literals (`"poisson"`, `"normal"`, `"gaussian"`) results in a `ValidationError`.
+
+* Confirms that the `Literal[...]` constraint on `distribution` is enforced.
+
+---
+
+With these nine tests you fully cover:
+
+1. **Defaulting behavior** for both “normal” and “gaussian.”
+2. **No‐op behavior** for Poisson defaults.
+3. **Preservation** of explicit user input.
+4. **Type‐checking** on required fields.
+5. **Literal‐constraint** enforcement.