package dnfbridge

import (
	"fmt"
	"strings"
	"time"

	"longheng.io/server/internal/modules/dnf/onlineevent"
)

// Current DNF.exe registers sub_1D89E70 at notification 0x357 (855).
// Its four u32 reads are type, state, content ID, and the extra schedule
// value. sub_1DBCD80 stores {ID, state, type, extra}; the portal's
// sub_34097D0 -> sub_1DBCBD0 accepts dungeon/type 0 with state 1 or 2.
const currentDungeonScheduleNotificationID uint16 = 855

// The town's seven co-located gate NPCs use [open visible event] 2418..2424.
// 0x23A8CC5 / 0x23B030D query base-directory membership via sub_2041F70,
// not the twelve-parameter activity state. Include only today's gate in op108:
// adding all seven base rows would draw overlapping native ANI/ALS assemblies.
// Production callers supply the service clock when constructing the directory.
func currentMysteriousRuinsPortalEventID(now time.Time) uint16 {
	weekday := now.In(onlineevent.ChinaCalendar).Weekday()
	return 2418 + uint16((int(weekday)+6)%7) // Monday..Sunday
}

var currentMysteriousRuinsDungeons = [...]struct {
	id   uint32
	path string
}{
	{4906, "dungeon/gcontents/171116_dayofdungeon/chn_daydungeon_01.dgn"},
	{4907, "dungeon/gcontents/171116_dayofdungeon/chn_daydungeon_02.dgn"},
	{4908, "dungeon/gcontents/171116_dayofdungeon/chn_daydungeon_03.dgn"},
	{4909, "dungeon/gcontents/171116_dayofdungeon/chn_daydungeon_04.dgn"},
	{4910, "dungeon/gcontents/171116_dayofdungeon/chn_daydungeon_05.dgn"},
}

// 神秘异次元遗迹所在的城镇/区域与地图。城镇 107 = `town/chn_DayDungeon.twn`，
// 其 [area] 0 就是 `Town/DayDungeon/DayDungeon_town.map`（该 .twn 里逐字如此）。
// 阿比斯入口的放行判定要求这三者同时精确匹配，避免把放行范围扩散到其它目标。
const (
	currentMysteriousRuinsTownID      = 107
	currentMysteriousRuinsAreaID      = 0
	currentMysteriousRuinsTownMapPath = "Town/DayDungeon/DayDungeon_town.map"
)

func isCurrentMysteriousRuinsTownArea(townID, areaID byte) bool {
	return int(townID) == currentMysteriousRuinsTownID && int(areaID) == currentMysteriousRuinsAreaID
}

// isCurrentMysteriousRuinsTownMapPath 归一化大小写与分隔符后精确比对地图路径。
func isCurrentMysteriousRuinsTownMapPath(path string) bool {
	normalized := strings.ToLower(strings.ReplaceAll(strings.TrimSpace(path), "\\", "/"))
	return normalized == strings.ToLower(currentMysteriousRuinsTownMapPath)
}

func buildCurrentMysteriousRuinsScheduleBody(dungeonID uint32) []byte {
	var writer packetWriter
	writer.writeUint32(0) // native dungeon schedule category
	writer.writeUint32(1) // open; the local profile opens these five all day
	writer.writeUint32(dungeonID)
	writer.writeUint32(0)
	return writer.bytes()
}

func (s *Service) sendCurrentMysteriousRuinsSchedule(session *gameSession, townID, areaID byte, source string) error {
	if s == nil || session == nil || session.selectedCharacterID == 0 || townID != 107 || areaID != 0 {
		return nil
	}
	if s.options.pvfPath == "" {
		return nil // services without a runtime PVF do not own this activity
	}
	table, _, err := s.dungeonWorldMap()
	if err != nil {
		return err
	}
	// Validate the whole scope before the first write. Never reinterpret an ID
	// belonging to a different PVF, or invent a dungeon to complete the list.
	for _, spec := range currentMysteriousRuinsDungeons {
		dungeon, found := table.FindDungeon(int64(spec.id))
		if !found || !strings.EqualFold(strings.ReplaceAll(dungeon.Path, "\\", "/"), spec.path) {
			return fmt.Errorf("mysterious ruins schedule: dungeon %d does not match runtime PVF %s", spec.id, spec.path)
		}
	}
	for _, spec := range currentMysteriousRuinsDungeons {
		if err := s.sendCurrentSceneFixedClass0Packet(session, currentDungeonScheduleNotificationID,
			buildCurrentMysteriousRuinsScheduleBody(spec.id), source+"_mysterious_ruins_schedule"); err != nil {
			return err
		}
	}
	s.logGameEvent(session, "game-mysterious-ruins-schedule-open", "char_id", session.selectedCharacterID,
		"town_id", townID, "area_id", areaID, "notification", currentDungeonScheduleNotificationID,
		"dungeon_ids", []uint32{4906, 4907, 4908, 4909, 4910}, "state", 1,
		"source", source, "policy", "local_all_day_native_schedule")
	return nil
}