package gameserver

import (
	"fmt"

	"google.golang.org/protobuf/proto"

	"gac-hkrpg-go/internal/common"
	goproto "gac-hkrpg-go/protocol/proto"
)

// This file ports the raw special-case arms of CommandHandler::on_message and
// the dummy! macro list from the Rust packet.rs / handlers/mod.rs.

func init() {
	// ---- dummy (empty ScRsp) list ----
	for _, name := range []string{
		"GetLevelRewardTakenList",
		"QueryProductInfo",
		"GetQuestRecord",
		"GetCurAssist",
		"GetDailyActiveInfo",
		"GetFightActivityData",
		"GetExpeditionData",
		"GetLoginActivity",
		"GetRaidInfo",
		"GetTrialActivityData",
		"GetNpcStatus",
		"GetSecretKeyInfo",
		"GetVideoVersionKey",
		"FinishTalkMission",
		"GetRechargeGiftInfo",
		"GetPreAvatarGrowthInfo",
		"GetPreAvatarActivityList",
		"GetFriendAssistList",
		"GetAssistList",
		"B51RacingGetData",
	} {
		dummy(name)
	}

	// Bind requests by the current command names; do not retain numeric aliases
	// from earlier builds, which may now identify responses or notifications.
	rawNamed("GetChallengeGroupStatisticsCsReq", challengeGroupStatsReply)
	rawNamed("GetChallengeTierceDataCsReq", challengeTierceReply)
	rawNamed("StartChallengeCsReq", handleStartChallenge)
	rawNamed("StartChallengeTierceCsReq", handleStartChallengeTierce)
	rawNamed("SetChallengeTierceLineupCsReq", handleSetChallengeTierceLineup)
	rawNamed("LeaveChallengeCsReq", handleLeaveChallenge)
	rawNamed("LeaveChallengeTierceCsReq", handleLeaveChallengeTierce)
	rawNamed("TakeChallengeCumulativeRewardCsReq", handleTakeChallengeReward)
	// The request/response names remain obfuscated in the upstream schema.
	rawNamed("HIGLJHLNODG", handleExRankUnlock)

	rawNamed("GetSwitchHandDataCsReq", func(s *Session, payload []byte) error {
		return s.Send(&goproto.GetSwitchHandDataScRsp{})
	})

	handle("GetChallengeTierceController", func(s *Session, req *goproto.GetChallengeTierceControllerCsReq, rsp *goproto.GetChallengeTierceControllerScRsp) error {
		rsp.Retcode = 0
		if run := s.ChallengeRun; run != nil && run.Tierce {
			rsp.CurTierceChallenge = run.TierceCur
		}
		return nil
	})
	handle("StartChallengePeak", handleStartChallengePeak)
	rawNamed("LeaveChallengePeakCsReq", func(s *Session, payload []byte) error {
		return leaveChallengeScene(s, &goproto.LeaveChallengePeakScRsp{})
	})

}

// The EX request remains obfuscated in PearlSR 005d2c1: field 5 is
// interpreted as an avatar, EX-rank or material ID only by an explicit mapping.
// Never unlock every avatar when an unknown value is received.
func handleExRankUnlock(s *Session, payload []byte) error {
	var req goproto.HIGLJHLNODG
	if err := proto.Unmarshal(payload, &req); err != nil {
		return err
	}
	value := req.OJFIGABCKLG
	resources, err := loadEidolonResources()
	if err != nil {
		return err
	}
	var avatarID uint32
	for id, exID := range common.AvatarExRankMap {
		if value == id || value == exID || value == resources.ExMaterials[id].ItemID {
			avatarID = id
			break
		}
	}
	rsp := &goproto.LPOLGDLAADM{}
	player := s.JSON()
	if player == nil || avatarID == 0 || player.Avatars[avatarID] == nil {
		rsp.Retcode = uint32(goproto.Retcode_RET_AVATAR_NOT_EXIST)
		Log(fmt.Sprintf("[EX-RANK] rejected unmapped value=%d", value))
		return s.Send(rsp)
	}
	if _, active := CURRENT_BATTLE.Load(s.Token); active {
		rsp.Retcode = uint32(goproto.Retcode_RET_AVATAR_RANK_NOT_MATCH)
		return s.Send(rsp)
	}
	avatar := player.Avatars[avatarID]
	previous := avatar.ExRankUnlocked
	avatar.ExRankUnlocked = true
	if err := player.SavePersistentChecked(); err != nil {
		avatar.ExRankUnlocked = previous
		return err
	}
	notify := &goproto.PlayerSyncScNotify{}
	buildSync(player, notify, []uint32{avatarID}, nil, nil)
	notify.MaterialList, err = eidolonMaterials(player)
	if err != nil {
		return err
	}
	if err := s.Send(notify); err != nil {
		return err
	}
	Log(fmt.Sprintf("[EX-RANK] unlocked avatar=%d value=%d", avatarID, value))
	return s.Send(rsp)
}

// challengeGroupStatsReply uses the current typed statistics response.
func challengeGroupStatsReply(s *Session, payload []byte) error {
	var req goproto.GetChallengeGroupStatisticsCsReq
	if err := proto.Unmarshal(payload, &req); err != nil {
		return err
	}
	// Match upstream: echo the group without fabricating historical scores.
	return s.Send(&goproto.GetChallengeGroupStatisticsScRsp{GroupId: req.GroupId})
}

// challengeTierceReply sends only the response paired with the current request.
func challengeTierceReply(s *Session, payload []byte) error {
	return s.Send(buildGetChallengeTierceDataScRspReal(s))
}

func readUvarint(b []byte) (uint64, int) {
	var x uint64
	var s uint
	for i := 0; i < len(b) && i < 10; i++ {
		y := b[i]
		if y < 0x80 {
			if i == 9 && y > 1 {
				return 0, 0
			}
			return x | uint64(y)<<s, i + 1
		}
		x |= uint64(y&0x7f) << s
		s += 7
	}
	return 0, 0
}

func appendUvarint(b []byte, v uint64) []byte {
	for v >= 0x80 {
		b = append(b, byte(v)|0x80)
		v >>= 7
	}
	return append(b, byte(v))
}

var _ = goproto.CmdIDByName