package luckygift

import (
	"testing"
)

func TestDefaultConfigPassesValidation(t *testing.T) {
	config := DefaultConfig("hyapp", "pool_95")
	config.Enabled = true

	if err := validateConfig(config); err != nil {
		t.Fatalf("default lucky gift config should be publishable: %v", err)
	}
}

func TestValidateConfigAcceptsIndependentPoolScope(t *testing.T) {
	config := DefaultConfig("hyapp", "pool_98")
	config.Enabled = true

	if err := validateConfig(config); err != nil {
		t.Fatalf("expected pool scoped lucky gift config to pass: %v", err)
	}
}

func TestNormalizeTiersBuildsMultiplierDrivenTiers(t *testing.T) {
	tiers, multipliers := normalizeTiers(nil, []int64{0, 500_000, 2_000_000}, 500, 100)

	if len(multipliers) != 3 || multipliers[1] != 500_000 || multipliers[2] != 2_000_000 {
		t.Fatalf("expected normalized multiplier list, got %#v", multipliers)
	}
	if len(tiers) != 9 {
		t.Fatalf("expected three pools times three multipliers, got %d", len(tiers))
	}
	for _, tier := range tiers {
		if !tier.Enabled || tier.Weight != 0 {
			t.Fatalf("tier should be enabled with runtime-generated weight: %#v", tier)
		}
		if tier.MultiplierPPM == 500_000 && tier.RewardCoins != 250 {
			t.Fatalf("expected 0.5x reward to follow reference cost, got %#v", tier)
		}
	}
}

func TestNormalizeTiersDoesNotForceZeroMultiplier(t *testing.T) {
	tiers, multipliers := normalizeTiers(nil, []int64{1_000_000, 2_000_000}, 500, 100)

	if len(multipliers) != 2 || multipliers[0] != 1_000_000 || multipliers[1] != 2_000_000 {
		t.Fatalf("expected positive-only multiplier list to stay positive-only, got %#v", multipliers)
	}
	for _, tier := range tiers {
		if tier.MultiplierPPM == 0 || tier.RewardCoins == 0 {
			t.Fatalf("positive-only test config must not generate none tier: %#v", tier)
		}
	}
}

func TestValidateConfigRejectsMultiplierListBelowTargetRTP(t *testing.T) {
	config := DefaultConfig("hyapp", "pool_low")
	config.MultiplierPPMs = []int64{0, 500_000}
	config.Tiers, config.MultiplierPPMs = normalizeTiers(nil, config.MultiplierPPMs, config.GiftPrice, config.HighMultiplier)

	if err := validateConfig(config); err == nil {
		t.Fatalf("expected max multiplier below RTP to be rejected")
	}
}

func TestDefaultRuleConfigPassesValidation(t *testing.T) {
	config := DefaultRuleConfig("hyapp", "pool_v2")
	config.Enabled = true

	if err := validateRuleConfig(config); err != nil {
		t.Fatalf("default v2 lucky gift config should be publishable: %v", err)
	}
}

func TestValidateRuleConfigRejectsPercentSubmittedAsPPM(t *testing.T) {
	config := DefaultRuleConfig("hyapp", "pool_bad_rtp")
	config.TargetRTPPPM = 95

	if err := validateRuleConfig(config); err == nil {
		t.Fatalf("expected raw percent value in ppm field to be rejected")
	}
}

func TestValidateRuleConfigRejectsStageWeightMismatch(t *testing.T) {
	config := DefaultRuleConfig("hyapp", "pool_bad_weight")
	config.Stages[0].Tiers[0].BaseWeightPPM = 299_999

	if err := validateRuleConfig(config); err == nil {
		t.Fatalf("expected stage probability sum mismatch to be rejected")
	}
}

func TestValidateRuleConfigRejectsMissingRiskCaps(t *testing.T) {
	config := DefaultRuleConfig("hyapp", "pool_bad_cap")
	config.RoomHourlyPayoutCap = 0

	if err := validateRuleConfig(config); err == nil {
		t.Fatalf("expected missing v2 risk cap to be rejected")
	}
}

func TestValidateRuleConfigRejectsInvalidEquivalentDrawThresholds(t *testing.T) {
	config := DefaultRuleConfig("hyapp", "pool_bad_stage_threshold")
	config.NormalMaxEquivalentDraws = config.NoviceMaxEquivalentDraws - 1

	if err := validateRuleConfig(config); err == nil {
		t.Fatalf("expected invalid equivalent draw thresholds to be rejected")
	}
}

func TestValidateRuleConfigRequiresExplicitZeroTier(t *testing.T) {
	config := DefaultRuleConfig("hyapp", "pool_no_zero")
	config.Stages[1].Tiers = config.Stages[1].Tiers[1:]

	if err := validateRuleConfig(config); err == nil {
		t.Fatalf("expected stage without 0x tier to be rejected")
	}
}