package config

import (
	"testing"
	"time"

	"github.com/spf13/viper"
)

func TestNormalizeRunMode(t *testing.T) {
	tests := []struct {
		input    string
		expected string
	}{
		{"simple", "simple"},
		{"SIMPLE", "simple"},
		{"standard", "standard"},
		{"invalid", "standard"},
		{"", "standard"},
	}

	for _, tt := range tests {
		result := NormalizeRunMode(tt.input)
		if result != tt.expected {
			t.Errorf("NormalizeRunMode(%q) = %q, want %q", tt.input, result, tt.expected)
		}
	}
}

func TestLoadDefaultSchedulingConfig(t *testing.T) {
	viper.Reset()

	cfg, err := Load()
	if err != nil {
		t.Fatalf("Load() error: %v", err)
	}

	if cfg.Gateway.Scheduling.StickySessionMaxWaiting != 3 {
		t.Fatalf("StickySessionMaxWaiting = %d, want 3", cfg.Gateway.Scheduling.StickySessionMaxWaiting)
	}
	if cfg.Gateway.Scheduling.StickySessionWaitTimeout != 45*time.Second {
		t.Fatalf("StickySessionWaitTimeout = %v, want 45s", cfg.Gateway.Scheduling.StickySessionWaitTimeout)
	}
	if cfg.Gateway.Scheduling.FallbackWaitTimeout != 30*time.Second {
		t.Fatalf("FallbackWaitTimeout = %v, want 30s", cfg.Gateway.Scheduling.FallbackWaitTimeout)
	}
	if cfg.Gateway.Scheduling.FallbackMaxWaiting != 100 {
		t.Fatalf("FallbackMaxWaiting = %d, want 100", cfg.Gateway.Scheduling.FallbackMaxWaiting)
	}
	if !cfg.Gateway.Scheduling.LoadBatchEnabled {
		t.Fatalf("LoadBatchEnabled = false, want true")
	}
	if cfg.Gateway.Scheduling.SlotCleanupInterval != 30*time.Second {
		t.Fatalf("SlotCleanupInterval = %v, want 30s", cfg.Gateway.Scheduling.SlotCleanupInterval)
	}
}

func TestLoadSchedulingConfigFromEnv(t *testing.T) {
	viper.Reset()
	t.Setenv("GATEWAY_SCHEDULING_STICKY_SESSION_MAX_WAITING", "5")

	cfg, err := Load()
	if err != nil {
		t.Fatalf("Load() error: %v", err)
	}

	if cfg.Gateway.Scheduling.StickySessionMaxWaiting != 5 {
		t.Fatalf("StickySessionMaxWaiting = %d, want 5", cfg.Gateway.Scheduling.StickySessionMaxWaiting)
	}
}