# FlixCooks Project Brain

This document summarizes the architectural knowledge, conventions, and learnings accumulated during our session.

## 1. Project Architecture & Stack
- **Backend:** Vanilla PHP. The project intentionally avoids heavy frameworks.
- **Database:** Flat-file JSON database (`data/recipes.json`). Data is loaded and saved via utility functions in `helpers.php`.
- **Admin Panel (`admin.php`):** Acts as a lightweight CMS. It uses simple textareas where each line maps to an array element (e.g., for `ingredients`, `steps`, `step_videos`, `step_timers`). This keeps the JSON structure clean and parsing straightforward.
- **Frontend:** Server-rendered PHP templates (`index.php`, `recipe.php`) with Vanilla JavaScript and Vanilla CSS. No Tailwind or heavy component libraries.

## 2. Design & Aesthetics
- **CSS:** Highly customized CSS with modern design tokens (e.g., `var(--ease-out-expo)`, `var(--surface-1)`).
- **Animations:** Employs sophisticated micro-animations, glassmorphism (`backdrop-filter: blur`), and dynamic layouts (e.g., `clip-path` for overlays).
- **Smooth Scrolling:** Uses **Lenis** (`LenisSmoothScroll`). 
  - *Crucial Rule:* Whenever a fullscreen overlay (like the Cooking Mode) is opened, `lenis.stop()` must be called to prevent background scrolling. When closed, call `lenis.start()`.
- **Preloader:** A custom `CapitoliumPreloader` runs on the homepage. It is cached in `sessionStorage('flixcooks_preloader_seen')` so it only fires once per browsing session.

## 3. Antigravity Agent Configuration
- **Workspace Rules:** Best placed in `.agents/rules/` (e.g., `AGENT.md`). To ensure they are always active, the frontmatter must include:
  ```yaml
  always_on: true
  glob: "*"
  ```
- **Custom Skills:** Can be defined as JSON files in `.agents/skills/`. We successfully created `close_feature.json` to automate the Git workflow of checking out `main`, merging a feature branch, verifying functionality, and deleting the branch.

## 4. GitHub Actions & CI/CD
- **Gemini Code Review Automation:** We integrated `petarzarkov/gemini-code-review-action` to automatically review PRs.
  - **Secrets:** Must be passed using `env:` instead of `with:` (e.g., `GEMINI_API_KEY`, `GITHUB_TOKEN`), otherwise the action fails with unexpected input errors. NEVER hardcode API keys in workflow files.
  - **Model Naming:** Google's `v1beta` API is very strict. `gemini-1.5-flash` often fails. You must use the fully-qualified name like `gemini-1.5-flash-latest` or `gemini-2.0-flash-lite`.
  - **Pinning Versions:** Always pin GitHub Actions to a specific version tag (e.g., `@v1.0.4`) rather than `@latest` to prevent unexpected breaking changes.

## 5. Completed Milestones
- **Phase 3 (Nutrition):** Implemented. Recipes now store `calories`, `protein`, `carbs`, and `fat`. Admin panel handles inputs, and the UI displays them beautifully.
- **Phase 4 (Interactive Cooking Mode):** Implemented. Recipes now support step-by-step looping background videos and interactive timers (`step_videos`, `step_timers`). The UI utilizes a fullscreen overlay slider with Vanilla JS logic.
- **Phase 6 (Firestore Database Migration):** Migrated recipes database from `data/recipes.json` to Firebase Firestore.
  - *Zero-Dependency REST API Read:* Server-side read requests in `helpers.php` use native PHP cURL to query the Firestore REST API `/documents/recipes`. Complex Firestore nested type maps are dynamically parsed into clean standard associative arrays using custom decoders.
  - *Dynamic Local Fallback:* In case of rate limits, network failures, or missing `.env` config, all lookup functions automatically fail back to the local `recipes.json` flat-file, guaranteeing 100% database availability and site resilience.
  - *Browser-Driven Seeding & Auto-Sync:* Admin seeding and real-time updates are executed client-side in `admin.php` via the authenticated Firebase Client SDK, keeping the local file and Cloud Firestore perfectly in sync without server-side OAuth2 keys.

## 6. Next Steps
According to `TODO.md`, the next major feature block is completing the database seeding (by clicking "Seed Firestore" on `admin.php` in the browser) and verifying all recipe updates reflect in real-time. Afterwards, we can proceed to **Phase 5 (PWA & Offline Support)**.