fix: recover battle damage from statistics

internal/common/battle_report.go

@@ -90,15 +90,46 @@ func BattleReportFromStatistics(stt *goproto.BattleStatistics, battleID uint32,
 		Monsters:         make([]*BattleMonsterReport, 0, len(stt.MonsterList)),
 	}
 
+	// The 4.6.53 schema exposes OKFALMGFHMA entries with avatar_id and damage,
+	// but the enclosing message and several fields remain obfuscated. Treating
+	// these as per-avatar damage records is an inference that still needs a raw
+	// Client capture; use them only when the clear aggregate is zero.
+	damageByAvatar := make(map[uint32]float64)
+	var damageEventTotal float64
+	for _, event := range stt.OKFALMGFHMA {
+		if event == nil || event.AvatarId == 0 || event.Damage <= 0 {
+			continue
+		}
+		damageByAvatar[event.AvatarId] += event.Damage
+		damageEventTotal += event.Damage
+	}
+
 	var teamDmg, teamHeal, teamShield float64
 	for _, a := range stt.BattleAvatarList {
 		if a == nil {
 			continue
 		}
-		teamDmg += a.TotalDamage
+		damage := a.TotalDamage
+		if damage == 0 {
+			damage = damageByAvatar[a.Id]
+		}
+		teamDmg += damage
 		teamHeal += a.TotalHeal
 		teamShield += a.TotalShield
 	}
+	// If neither avatar aggregate source contains damage, enemy damage-taken
+	// stats still provide a reliable team total. They cannot identify which
+	// avatar dealt each hit, so per-avatar shares remain unavailable in that case.
+	if teamDmg == 0 && damageEventTotal > 0 {
+		teamDmg = damageEventTotal
+	}
+	if teamDmg == 0 {
+		for _, m := range stt.MonsterList {
+			if m != nil && m.TotalDamageTaken > 0 {
+				teamDmg += m.TotalDamageTaken
+			}
+		}
+	}
 	report.TeamTotalDamage = teamDmg
 	report.TeamTotalHeal = teamHeal
 	report.TeamTotalShield = teamShield
@@ -107,15 +138,19 @@ func BattleReportFromStatistics(stt *goproto.BattleStatistics, battleID uint32,
 		if a == nil {
 			continue
 		}
+		damage := a.TotalDamage
+		if damage == 0 {
+			damage = damageByAvatar[a.Id]
+		}
 		var dmgPercent float64
 		if teamDmg > 0 {
-			dmgPercent = (a.TotalDamage / teamDmg) * 100.0
+			dmgPercent = (damage / teamDmg) * 100.0
 		}
 		ar := &BattleAvatarReport{
 			AvatarID:              a.Id,
 			AvatarLevel:           a.AvatarLevel,
 			AvatarRank:            a.AvatarRank,
-			TotalDamage:           a.TotalDamage,
+			TotalDamage:           damage,
 			DamagePercent:         dmgPercent,
 			TotalDamageTaken:      a.TotalDamageTaken,
 			TotalHeal:             a.TotalHeal,

internal/common/battle_report_test.go

@@ -101,3 +101,47 @@ func TestBattleReportSerialization(t *testing.T) {
 		t.Fatal("expected error after clearing report, got nil")
 	}
 }
+
+func TestBattleReportUsesAvatarDamageEventsWhenAvatarTotalsAreZero(t *testing.T) {
+	stt := &goproto.BattleStatistics{
+		BattleAvatarList: []*goproto.AvatarBattleInfo{
+			{Id: 1503},
+			{Id: 1511},
+		},
+		OKFALMGFHMA: []*goproto.HDKEPPDIDIH{
+			{AvatarId: 1503, Damage: 720},
+			{AvatarId: 1503, Damage: 180},
+			{AvatarId: 1511, Damage: 100},
+		},
+		MonsterList: []*goproto.MonsterBattleInfo{{TotalDamageTaken: 1000}},
+	}
+
+	report := BattleReportFromStatistics(stt, 1, 1052106, "WIN")
+	if report.TeamTotalDamage != 1000 {
+		t.Fatalf("expected event-derived team damage 1000, got %f", report.TeamTotalDamage)
+	}
+	if report.Avatars[0].TotalDamage != 900 || report.Avatars[0].DamagePercent != 90 {
+		t.Fatalf("unexpected avatar 1503 report: %+v", report.Avatars[0])
+	}
+	if report.Avatars[1].TotalDamage != 100 || report.Avatars[1].DamagePercent != 10 {
+		t.Fatalf("unexpected avatar 1511 report: %+v", report.Avatars[1])
+	}
+}
+
+func TestBattleReportFallsBackToMonsterDamageTakenForTeamTotal(t *testing.T) {
+	stt := &goproto.BattleStatistics{
+		BattleAvatarList: []*goproto.AvatarBattleInfo{{Id: 1503}},
+		MonsterList: []*goproto.MonsterBattleInfo{
+			{TotalDamageTaken: 250},
+			{TotalDamageTaken: 750},
+		},
+	}
+
+	report := BattleReportFromStatistics(stt, 1, 1052106, "WIN")
+	if report.TeamTotalDamage != 1000 {
+		t.Fatalf("expected monster-derived team damage 1000, got %f", report.TeamTotalDamage)
+	}
+	if report.Avatars[0].DamagePercent != 0 {
+		t.Fatalf("cannot infer avatar share from monster totals, got %f", report.Avatars[0].DamagePercent)
+	}
+}