# Initial setup

## Pre-requisite tools

```shell
go install github.com/a-h/templ/cmd/templ@latest
go install github.com/sqlc-dev/sqlc/cmd/sqlc@latest
go install github.com/swaggo/swag/cmd/swag@latest
```

## Database
This project now uses [goose](https://github.com/pressly/goose) for DB migrations.

Install via `brew install goose` on a mac, or install via golang with command `go install github.com/pressly/goose/v3/cmd/goose@latest`

Create a new up/down migration file with this command
```shell
goose -dir db/migrations sqlite3 ./db.sqlite3 create init sql
```

```shell
sqlc generate
```

## HTML templates
Run `templ generate -path ./components` to generate code based on template files

## Documentation
Run `swag init --exclude "pkg.mod,pkg.build,pkg.tools" -o server/router/docs`

#### Database Configuration
By default the app uses SQLite and creates/opens `db.sqlite3`. You can opt into PostgreSQL
by setting environment variables:

- `DB_DRIVER`: `sqlite` (default) or `postgres`
- `DB_URL`: SQLite file path/DSN or PostgreSQL DSN

Examples:
```shell
# SQLite (default)
DB_DRIVER=sqlite DB_URL=./db.sqlite3

# PostgreSQL
DB_DRIVER=postgres DB_URL=postgres://user:pass@localhost:5432/vctp?sslmode=disable
```

PostgreSQL migrations live in `db/migrations_postgres`, while SQLite migrations remain in
`db/migrations`.

#### Snapshot Retention
Hourly and daily snapshot table retention can be configured with environment variables:

- `HOURLY_SNAPSHOT_MAX_AGE_DAYS` (default: 60)
- `DAILY_SNAPSHOT_MAX_AGE_MONTHS` (default: 12)