new readme

README.md

@@ -1,36 +1,45 @@
 # Portfolio Engine
 
-A lightweight portfolio tracking backend written in Go. Replaces spreadsheets with a proper database, REST API, and an interactive shell — all in a single binary.
+A lightweight portfolio and financial data backend written in Go. Tracks companies, currencies, and revenue reports across configurable time periods — replacing spreadsheets with a proper database, REST API, and interactive shell.
 
 ## Features
 
 - SQLite database with foreign key enforcement
 - REST API on port `8080`
 - Interactive shell for managing data without an HTTP client
-- Tracks companies with share count, price, and currency
+- Revenue tracking by period (quarterly, half-year, full year)
+- Revenue broken down by custom categories (product, location, segment...)
+- Health endpoint with DB latency, memory, and uptime stats
 
 ## Project Structure
 
 ```
 .
-├── main.go                  # Entry point, HTTP routes, shell loop
+├── main.go                      # Entry point — HTTP routes + shell loop
 ├── app.db                       # SQLite database (auto-created on first run)
 ├── build.sh                     # Build script
 ├── go.mod / go.sum
 └── internal/
     ├── database/
-    │   └── main.go          # Schema init (InitDB)
+    │   └── main.go              # Schema init (InitDB) — all CREATE TABLE statements
     ├── handlers/
-    │   └── main.go          # HTTP handlers (HealthHandler, AddCompanyHandler)
+    │   ├── main.go              # HealthHandler
+    │   ├── currency.go          # AddCurrencyHandler, GetCurrenciesHandler
+    │   └── revenue.go           # AddRevenueEntryHandler, GetRevenueReportHandler, GetRevenueSumHandler
     ├── model/
-    │   └── company.go       # Structs + SQL queries (Company, Currency, CompanyInput)
+    │   ├── company.go           # Company struct + SQL (InsertCompany, GetAllCompanies)
+    │   ├── currency.go          # Currency struct + SQL (InsertCurrency, GetAllCurrencies)
+    │   ├── periode.go           # Period struct + helpers (QuarterPeriod, HalfYearPeriod, FullYearPeriod)
+    │   └── revenue.go           # Revenue, RevenueReport, RevSum structs + SQL
     ├── service/
+    │   ├── main.go              # Service wiring
     │   ├── company.go           # Company business logic
     │   ├── currency.go          # Currency business logic
-    │   └── main.go          # Service setup
+    │   └── revenue.go           # Revenue aggregation logic
     └── shell/
-        ├── company.go       # Shell commands for companies
+        ├── company.go           # add-company, list-companies
-        └── currency.go      # Shell commands for currencies
+        ├── currency.go          # add-currency, list-currency
+        └── revenue.go           # add-revenue, list-revenue, sum-revenue
 ```
 
 ## Getting Started
@@ -51,7 +60,7 @@ go mod download
 go run main.go
 ```
 
-Or use the build script:
+Or build first:
 
 ```bash
 chmod +x build.sh
@@ -59,23 +68,26 @@ chmod +x build.sh
 ./Portifolio
 ```
 
-On startup you'll see:
+On startup:
 
 ```
 Connected to SQLite database
+Tables ready
 Server running on :8080
 
-Shell ready. Commands: add-company, help, exit
+Shell ready. Type 'help' for commands.
 >
 ```
 
-The HTTP server and the shell run concurrently — the API is live while you type shell commands.
+The HTTP server and shell run concurrently — the API is live while you type shell commands.
+
+---
 
 ## REST API
 
 ### `GET /health`
 
-Returns the status of the server and database connection.
+Returns server status, DB connection info, memory usage, and uptime.
 
 ```bash
 curl http://localhost:8080/health
@@ -84,44 +96,126 @@ curl http://localhost:8080/health
 ```json
 {
   "status": "ok",
-  "database": "ok"
+  "uptime": "4m32s",
+  "database": {
+    "status": "ok",
+    "latency": "121µs",
+    "open_connections": 1,
+    "in_use": 0,
+    "idle": 1
+  },
+  "memory": {
+    "alloc_mb": 2.31,
+    "sys_mb": 9.44,
+    "num_gc": 3
+  },
+  "go_version": "go1.22.0",
+  "goroutines": 4
 }
 ```
 
-Returns `503` if the database is unreachable.
+Returns `503` with `"status": "degraded"` if the database is unreachable.
 
 ---
 
 ### `POST /add/company`
 
-Add a new company. The `currency_id` must reference an existing currency in the database.
-
 ```bash
 curl -X POST http://localhost:8080/add/company \
+  -H "Content-Type: application/json" \
+  -d '{"name":"Novo Nordisk","shares_outstanding":4442064180,"price":251.00,"currency_id":1}'
+```
+
+---
+
+### `GET /companies`
+
+```bash
+curl http://localhost:8080/companies
+```
+
+---
+
+### `POST /add/currency`
+
+```bash
+curl -X POST http://localhost:8080/add/currency \
+  -H "Content-Type: application/json" \
+  -d '{"code":"DKK","name":"Danish Krone"}'
+```
+
+---
+
+### `GET /currencies`
+
+```bash
+curl http://localhost:8080/currencies
+```
+
+---
+
+### `POST /add/revenue/entry`
+
+Add a single revenue line to a report. The period is created automatically if it doesn't exist.
+
+```bash
+curl -X POST http://localhost:8080/add/revenue/entry \
   -H "Content-Type: application/json" \
   -d '{
-    "name": "Novo Nordisk",
+    "company_id":  1,
-    "shares_outstanding": 4442064180,
+    "currency_id": 1,
-    "price": 251.00,
+    "period_type": "Q",
-    "currency_id": 1
+    "year":        2025,
+    "index":       1,
+    "category":    "product",
+    "label":       "iPhone",
+    "value":       69143
   }'
 ```
 
-```json
+`period_type` is one of:
-{ "status": "created" }
+
+| Value | Meaning   | `index` range |
+|-------|-----------|---------------|
+| `Q`   | Quarter   | 1–4           |
+| `H`   | Half-year | 1–2           |
+| `Y`   | Full year | 1             |
+
+---
+
+### `GET /revenue/report`
+
+Get all revenue entries for a company and period.
+
+```bash
+curl "http://localhost:8080/revenue/report?company_id=1&period_type=Q&year=2025&index=1"
 ```
 
+---
+
+### `GET /revenue/sum`
+
+Sum all revenue entries for a company across all periods of a given type in a year.
+
+```bash
+curl "http://localhost:8080/revenue/sum?company_id=1&period_type=Q&year=2025"
+```
+
+---
+
 ## Shell Commands
 
-The shell starts automatically after the server and accepts commands interactively.
-
 | Command          | Description                                   |
-|------------------|--------------------------------------|
+|------------------|-----------------------------------------------|
+| `add-company`    | Add a new company interactively               |
+| `list-companies` | List all companies with price and share count |
 | `add-currency`   | Add a new currency interactively              |
 | `list-currency`  | List all currencies with their IDs            |
-| `add-company`    | Add a new company interactively      |
+| `add-revenue`    | Add a revenue entry interactively             |
-| `help`           | Show available commands              |
+| `list-revenue`   | List revenue entries for a company/period     |
-| `exit`           | Quit the application                 |
+| `sum-revenue`    | Sum revenue across all periods in a year      |
+| `help`           | Show all available commands                   |
+| `exit`           | Quit                                          |
 
 ### Example session
 
@@ -131,19 +225,46 @@ The shell starts automatically after the server and accepts commands interactive
   Name (e.g. Danish Krone): Danish Krone
   ✓ Currency 'Danish Krone' (DKK) added with ID 1
 
-> list-currency
-  ID    CODE   NAME
-  ------------------------------
-  1     DKK    Danish Krone
-
 > add-company
-  Name: Maersk
+  Name: Novo Nordisk
-  Shares outstanding: 15224309
+  Shares outstanding: 4442064180
-  Price: 15270.00
+  Price: 251.00
   Currency ID: 1
-  ✓ Company 'Maersk' added.
+  ✓ Company 'Novo Nordisk' added.
+
+> add-revenue
+  Company ID: 1
+  Currency ID: 1
+  Period type (Q/H/Y): Q
+  Year: 2025
+  Index (Q: 1-4 | H: 1-2 | Y: 1): 1
+  Category (product/location/total): product
+  Label (e.g. iPhone, Americas): Diabetes Care
+  Value: 54200
+  ✓ Revenue entry added: product / Diabetes Care = 54200.00 (Q1 2025)
+
+> sum-revenue
+  Company ID: 1
+  Period type to sum (Q/H/Y): Q
+  Year: 2025
+
+  Revenue Sum — FY2025
+  Total: 54200.00
+
+  By Category:
+    product         54200.00
+
+  By Label:
+    Diabetes Care   54200.00
+
+> list-companies
+  ID    NAME                 CURRENCY   PRICE           SHARES
+  ------------------------------------------------------------
+  1     Novo Nordisk         DKK        251.00          4442064180
 ```
 
+---
+
 ## Database Schema
 
 ```sql
@@ -161,13 +282,60 @@ CREATE TABLE companies (
     currency_id        INTEGER NOT NULL,
     FOREIGN KEY (currency_id) REFERENCES currencies(id)
 );
+
+CREATE TABLE periods (
+    id         INTEGER PRIMARY KEY AUTOINCREMENT,
+    type       TEXT    NOT NULL CHECK(type IN ('Q', 'H', 'Y')),
+    year       INTEGER NOT NULL,
+    idx        INTEGER NOT NULL,
+    start_date TEXT    NOT NULL,
+    end_date   TEXT    NOT NULL,
+    UNIQUE(type, year, idx)
+);
+
+CREATE TABLE revenue_reports (
+    id         INTEGER PRIMARY KEY AUTOINCREMENT,
+    company_id INTEGER NOT NULL,
+    period_id  INTEGER NOT NULL,
+    FOREIGN KEY (company_id) REFERENCES companies(id),
+    FOREIGN KEY (period_id)  REFERENCES periods(id),
+    UNIQUE(company_id, period_id)
+);
+
+CREATE TABLE revenue_entries (
+    id          INTEGER PRIMARY KEY AUTOINCREMENT,
+    report_id   INTEGER NOT NULL,
+    currency_id INTEGER NOT NULL,
+    category    TEXT    NOT NULL,
+    label       TEXT    NOT NULL,
+    value       REAL    NOT NULL,
+    FOREIGN KEY (report_id)   REFERENCES revenue_reports(id),
+    FOREIGN KEY (currency_id) REFERENCES currencies(id)
+);
+
+CREATE TABLE category_defs (
+    id         INTEGER PRIMARY KEY AUTOINCREMENT,
+    company_id INTEGER NOT NULL,
+    name       TEXT    NOT NULL,
+    FOREIGN KEY (company_id) REFERENCES companies(id),
+    UNIQUE(company_id, name)
+);
+
+CREATE TABLE category_labels (
+    id              INTEGER PRIMARY KEY AUTOINCREMENT,
+    category_def_id INTEGER NOT NULL,
+    label           TEXT    NOT NULL,
+    FOREIGN KEY (category_def_id) REFERENCES category_defs(id),
+    UNIQUE(category_def_id, label)
+);
 ```
 
+---
+
 ## Roadmap
 
-- `GET /companies` — list all companies
+- `GET /company/{id}/revenue` — full revenue history for a company
-- `GET /currencies` — list all currencies  
 - Price update endpoint
-- Market cap calculation (price × shares)
+- Market cap calculation (price × shares outstanding)
 - Multi-currency conversion
 - Frontend dashboard