package config

import (
	"os"
	"path/filepath"
	"testing"
)

func TestNormalizeSubscriptionDefaults(t *testing.T) {
	cfg := &Config{Subscriptions: []SubscriptionConfig{{
		URL:    "amqps://example.invalid/vhost",
		Queue:  "trade.signal.notify.queue",
		Source: "trade-signal",
	}}}
	if err := cfg.NormalizeSubscriptions(); err != nil {
		t.Fatal(err)
	}
	s := cfg.Subscriptions[0]
	if s.Name != "trade.signal.notify.queue" {
		t.Fatalf("name=%q", s.Name)
	}
	if s.MaxRetry != 3 {
		t.Fatalf("max_retry=%d", s.MaxRetry)
	}
	if s.ExchangeType != "fanout" {
		t.Fatalf("exchange_type=%q", s.ExchangeType)
	}
	if s.Formatter != "trade_signal" {
		t.Fatalf("formatter=%q", s.Formatter)
	}
}

func TestNormalizeSkipsEmptyURL(t *testing.T) {
	cfg := &Config{Subscriptions: []SubscriptionConfig{{
		Queue: "q", Source: "s",
	}}}
	if err := cfg.NormalizeSubscriptions(); err != nil {
		t.Fatal(err)
	}
	if n := len(cfg.ActiveSubscriptions()); n != 0 {
		t.Fatalf("active=%d", n)
	}
}

func TestNormalizeUnknownFormatter(t *testing.T) {
	cfg := &Config{Subscriptions: []SubscriptionConfig{{
		URL: "amqps://example.invalid/vhost", Queue: "q", Source: "s", Formatter: "other",
	}}}
	if err := cfg.NormalizeSubscriptions(); err == nil {
		t.Fatal("expected error")
	}
}

func TestLoadExpandsRabbitMQURL(t *testing.T) {
	dir := t.TempDir()
	path := filepath.Join(dir, "config.yaml")
	yaml := []byte(`
server:
  port: 8080
  admin_key: test
subscriptions:
  - name: trade-signal
    url: "${RABBITMQ_URL}"
    queue: q
    source: trade-signal
`)
	if err := os.WriteFile(path, yaml, 0o644); err != nil {
		t.Fatal(err)
	}
	t.Setenv("RABBITMQ_URL", "amqps://user:pass@example.invalid:5671/vhost")
	cfg, err := Load(path)
	if err != nil {
		t.Fatal(err)
	}
	if len(cfg.Subscriptions) != 1 {
		t.Fatalf("subs=%d", len(cfg.Subscriptions))
	}
	if cfg.Subscriptions[0].URL != "amqps://user:pass@example.invalid:5671/vhost" {
		t.Fatalf("url=%q", cfg.Subscriptions[0].URL)
	}
	if n := len(cfg.ActiveSubscriptions()); n != 1 {
		t.Fatalf("active=%d", n)
	}
}

func TestActiveSubscriptionsSkipsPlaceholderURL(t *testing.T) {
	cfg := &Config{Subscriptions: []SubscriptionConfig{{
		URL: "${RABBITMQ_URL}", Queue: "q", Source: "s", Name: "trade-signal",
	}}}
	if n := len(cfg.ActiveSubscriptions()); n != 0 {
		t.Fatalf("placeholder should not be active, n=%d", n)
	}
}

func TestLoadParsesStrategyOverrides(t *testing.T) {
	cfg, err := Load(filepath.Join("..", "..", "config", "config.yaml"))
	if err != nil {
		t.Fatal(err)
	}
	var sub *SubscriptionConfig
	for i := range cfg.Subscriptions {
		if cfg.Subscriptions[i].Name == "trade-signal" {
			sub = &cfg.Subscriptions[i]
			break
		}
	}
	if sub == nil {
		t.Fatal("trade-signal subscription not found")
	}
	if len(sub.StrategyOverrides) == 0 {
		t.Fatalf("strategy_overrides not parsed: %+v", *sub)
	}
	// Viper lower-cases nested map keys during load, so the parsed key is "blong".
	o, ok := sub.StrategyOverrides["blong"]
	if !ok {
		t.Fatalf("blong override missing, got keys=%v", sub.StrategyOverrides)
	}
	got := o.QuantityMultiplierFor("OPEN")
	if got != 100 {
		t.Fatalf("open multiplier=%v want 100", got)
	}
	if o.Leverage == nil || *o.Leverage != 100 {
		t.Fatalf("leverage=%v want 100", o.Leverage)
	}
}

func TestLoadStrategyOverridesKeyInsensitive(t *testing.T) {
	// Confirms viper lower-cases keys; tradesignal.overrideFor matches case-insensitively.
	sub := SubscriptionConfig{StrategyOverrides: map[string]StrategyOverride{
		"blong": {Leverage: intPtr(100)},
	}}
	if _, ok := sub.StrategyOverrides["BLONG"]; ok {
		t.Fatalf("expected case-sensitive map; overrides=%v", sub.StrategyOverrides)
	}
}

func intPtr(v int) *int { return &v }

func TestQuantityMultiplierFor(t *testing.T) {
	o := StrategyOverride{QuantityMultipliers: QuantityMultipliers{Open: 100, Add: 0}}
	if o.QuantityMultiplierFor("OPEN") != 100 {
		t.Fatalf("open=%v", o.QuantityMultiplierFor("OPEN"))
	}
	if o.QuantityMultiplierFor("ADD") != 1 {
		t.Fatalf("add<=0 should be 1, got %v", o.QuantityMultiplierFor("ADD"))
	}
	if o.QuantityMultiplierFor("UNKNOWN") != 1 {
		t.Fatalf("unknown=%v", o.QuantityMultiplierFor("UNKNOWN"))
	}
}