package apiserver

import (
	"testing"
)

// The deployed contract is these six variables and these defaults; nothing else
// is consulted for the database connection.
func TestLoadConfig_DatabaseEnvContract(t *testing.T) {
	// Set by a deployment that would confuse a DATABASE_URL/PG*-aware loader.
	t.Setenv("DATABASE_URL", "postgres://someone@elsewhere:5432/other")
	t.Setenv("PGHOST", "elsewhere")

	cfg, err := LoadConfig()
	if err != nil {
		t.Fatalf("LoadConfig: %v", err)
	}
	if got, want := cfg.DatabaseDSN(), "postgres://forgebot:@localhost:5432/forgebot?sslmode=disable"; got != want {
		t.Fatalf("default DSN = %q, want %q", got, want)
	}

	t.Setenv("DBHOST", "db.example")
	t.Setenv("DBPORT", "6432")
	t.Setenv("DBUSER", "bot")
	t.Setenv("DBPASS", "hunter2")
	t.Setenv("DBNAME", "tasks")
	t.Setenv("DBSSL", "require")

	cfg, err = LoadConfig()
	if err != nil {
		t.Fatalf("LoadConfig: %v", err)
	}
	if got, want := cfg.DatabaseDSN(), "postgres://bot:hunter2@db.example:6432/tasks?sslmode=require"; got != want {
		t.Fatalf("DSN = %q, want %q", got, want)
	}
}

func TestLoadConfig_RejectsBadPort(t *testing.T) {
	t.Setenv("DBPORT", "not-a-port")
	if _, err := LoadConfig(); err == nil {
		t.Fatal("expected an error for a non-numeric DBPORT")
	}
}

// A password with reserved characters used to truncate the DSN; the builder
// percent-escapes the credentials so it round-trips through pgx intact.
func TestDatabaseDSN_EscapesCredentials(t *testing.T) {
	cfg := &Config{
		DBHost: "db.example", DBPort: 5432, DBUser: "bo/t",
		DBPass: "p@ss/word", DBName: "tasks", DBSSL: "disable",
	}
	if got, want := cfg.DatabaseDSN(), "postgres://bo%2Ft:p%40ss%2Fword@db.example:5432/tasks?sslmode=disable"; got != want {
		t.Fatalf("DSN = %q, want %q", got, want)
	}
}