# monarch_election_ui_system.gd —— 40250 帝国君主大选投票公示系统 1:1
# 严格对照：
#   metin2/src/server/game/src/monarch.h, monarch.cpp (CMonarch)
#   metin2/src/server/share/locale/english/quest/xxx_monarch.quest
#   40250/Server Client TMP4/mysql/player/monarch_candidacy.MYD, monarch_election.MYD
extends RefCounted

const EMPIRE_SHINSOO := 1    # 赤蛇国 (进国)
const EMPIRE_CHUNJO := 2     # 白虎国 (顺天)
const EMPIRE_JINNO := 3      # 苍龙国 (忍国)

const STATUS_CLOSED := 0     # 选举未开放
const STATUS_CANDIDACY := 1  # 候选人报名登记期
const STATUS_VOTING := 2     # 全民大选投票期
const STATUS_CONCLUDED := 3  # 大选揭晓，君主即位

const MIN_CANDIDATE_LEVEL := 50
const MIN_VOTER_LEVEL := 50
const CANDIDACY_FEE := 1000000        # 报名保证金 1,000,000 金币
const MAX_CANDIDATES_PER_EMPIRE := 8 # 每国最多 8 名候选人

class CandidateInfo:
	var pid: int
	var name: String
	var empire: int
	var level: int
	var votes: int = 0
	var manifesto: String = ""

	func _init(p_pid: int, p_name: String, p_emp: int, p_lvl: int, p_manifesto: String) -> void:
		pid = p_pid
		name = p_name
		empire = p_emp
		level = p_lvl
		votes = 0
		manifesto = p_manifesto

# 选举状态字典: empire_id -> status
var election_states: Dictionary = {
	EMPIRE_SHINSOO: STATUS_CLOSED,
	EMPIRE_CHUNJO: STATUS_CLOSED,
	EMPIRE_JINNO: STATUS_CLOSED
}

# 候选人名册: empire_id -> Array of CandidateInfo
var candidates: Dictionary = {
	EMPIRE_SHINSOO: [],
	EMPIRE_CHUNJO: [],
	EMPIRE_JINNO: []
}

# 选民投票记录: empire_id -> { voter_pid: candidate_pid }
var voter_records: Dictionary = {
	EMPIRE_SHINSOO: {},
	EMPIRE_CHUNJO: {},
	EMPIRE_JINNO: {}
}

# 现任君主数据: empire_id -> { "pid": int, "name": String, "treasury": int, "tax_rate": int }
var current_monarchs: Dictionary = {
	EMPIRE_SHINSOO: { "pid": 0, "name": "", "treasury": 10000000, "tax_rate": 3 },
	EMPIRE_CHUNJO:  { "pid": 0, "name": "", "treasury": 10000000, "tax_rate": 3 },
	EMPIRE_JINNO:   { "pid": 0, "name": "", "treasury": 10000000, "tax_rate": 3 },
}

func _init() -> void:
	reset_all_elections()

func reset_all_elections() -> void:
	for emp in [EMPIRE_SHINSOO, EMPIRE_CHUNJO, EMPIRE_JINNO]:
		election_states[emp] = STATUS_CLOSED
		candidates[emp] = []
		voter_records[emp] = {}

# 1. 管理员开启大选阶段 (GM: Kaiser Wahl Einstellung)
func set_election_stage(empire: int, new_status: int) -> bool:
	if not election_states.has(empire):
		return false
	election_states[empire] = new_status
	return true

# 2. 候选人报名参选 (monarch_candidacy)
func register_candidacy(
	pid: int,
	name: String,
	empire: int,
	level: int,
	player_gold: int,
	manifesto: String
) -> Dictionary:
	var res := { "success": false, "gold_cost": 0, "error_code": "OK", "message": "" }

	if election_states.get(empire) != STATUS_CANDIDACY:
		res["error_code"] = "CANDIDACY_NOT_OPEN"
		res["message"] = "当前未处于君主参选登记期。"
		return res

	if level < MIN_CANDIDATE_LEVEL:
		res["error_code"] = "LEVEL_TOO_LOW"
		res["message"] = "参选君主等级必须达到 Lv 50。"
		return res

	if player_gold < CANDIDACY_FEE:
		res["error_code"] = "INSUFFICIENT_GOLD"
		res["message"] = "报名参选需缴纳 1,000,000 金币保证金。"
		return res

	var emp_candidates: Array = candidates[empire]
	if emp_candidates.size() >= MAX_CANDIDATES_PER_EMPIRE:
		res["error_code"] = "CANDIDATES_FULL"
		res["message"] = "本届君主候选人名额已满 (最多 8 人)。"
		return res

	for c in emp_candidates:
		if c.pid == pid:
			res["error_code"] = "ALREADY_REGISTERED"
			res["message"] = "您已成功报名，无需重复登记。"
			return res

	var cand = CandidateInfo.new(pid, name, empire, level, manifesto)
	emp_candidates.append(cand)

	res["success"] = true
	res["gold_cost"] = CANDIDACY_FEE
	res["message"] = "恭喜！您已成功登记为第 %d 帝国君主候选人。" % empire
	return res

# 3. 选民投票 (monarch_election)
func cast_vote(voter_pid: int, voter_empire: int, voter_level: int, target_candidate_pid: int) -> Dictionary:
	var res := { "success": false, "error_code": "OK", "message": "" }

	if election_states.get(voter_empire) != STATUS_VOTING:
		res["error_code"] = "VOTING_NOT_OPEN"
		res["message"] = "当前未处于全民投票大选阶段。"
		return res

	if voter_level < MIN_VOTER_LEVEL:
		res["error_code"] = "VOTER_LEVEL_TOO_LOW"
		res["message"] = "等级未达到 Lv 50，尚无大选投票权。"
		return res

	var records: Dictionary = voter_records[voter_empire]
	if records.has(voter_pid):
		res["error_code"] = "ALREADY_VOTED"
		res["message"] = "您在本届选举中已经投过神圣的一票，不可重复投票。"
		return res

	# 查找目标候选人
	var target_cand: CandidateInfo = null
	for c in candidates[voter_empire]:
		if c.pid == target_candidate_pid:
			target_cand = c
			break

	if target_cand == null:
		res["error_code"] = "CANDIDATE_NOT_FOUND"
		res["message"] = "未找到该候选人。"
		return res

	# 计票
	target_cand.votes += 1
	records[voter_pid] = target_candidate_pid

	res["success"] = true
	res["message"] = "投票成功！感谢您支持候选人 %s。" % target_cand.name
	return res

# 4. 统计揭晓并任命新君主
func conclude_election(empire: int) -> Dictionary:
	var res := { "success": false, "winner_pid": 0, "winner_name": "", "votes": 0 }
	if not election_states.has(empire):
		return res

	var emp_candidates: Array = candidates[empire]
	if emp_candidates.is_empty():
		election_states[empire] = STATUS_CLOSED
		return res

	# 选出最高票者
	var top_cand: CandidateInfo = emp_candidates[0]
	for c in emp_candidates:
		if c.votes > top_cand.votes:
			top_cand = c

	# 就任君主
	current_monarchs[empire]["pid"] = top_cand.pid
	current_monarchs[empire]["name"] = top_cand.name
	election_states[empire] = STATUS_CONCLUDED

	res["success"] = true
	res["winner_pid"] = top_cand.pid
	res["winner_name"] = top_cand.name
	res["votes"] = top_cand.votes
	return res

# 5. 君主行使特权：调整帝国商业税率 (1% ~ 10%)
func set_tax_rate(caller_pid: int, empire: int, new_tax: int) -> Dictionary:
	var res := { "success": false, "error_code": "OK", "message": "" }
	var monarch = current_monarchs[empire]

	if caller_pid != monarch["pid"]:
		res["error_code"] = "NOT_MONARCH"
		res["message"] = "只有现任帝国君主有权调整商业税率。"
		return res

	var clamped_tax: int = clamp(new_tax, 1, 10)
	monarch["tax_rate"] = clamped_tax

	res["success"] = true
	res["tax_rate"] = clamped_tax
	res["message"] = "帝国商业税率已调整为 %d%%。" % clamped_tax
	return res

# 6. 君主行使特权：释放全帝国神佑祝福
func activate_monarch_blessing(caller_pid: int, empire: int) -> Dictionary:
	var res := { "success": false, "error_code": "OK", "blessing_buff": {}, "message": "" }
	var monarch = current_monarchs[empire]

	if caller_pid != monarch["pid"]:
		res["error_code"] = "NOT_MONARCH"
		return res

	res["success"] = true
	res["blessing_buff"] = {
		"exp_bonus": 10,
		"att_bonus": 10,
		"duration_sec": 7200
	}
	res["message"] = "君主神佑降临！帝国全体子民获得 +10% 经验与 +10% 攻击力加成 (持续2小时)。"
	return res