// 把比賽狀態轉成 Telegram 訊息文字（HTML）與 inline 鍵盤
import { getServing, getWinner, isDoubles } from './match.js'
import { escapeHtml } from './util.js'

const TEAM_ICON = ['🅰️', '🅱️']
const COURT_LABEL = { right: '右區', left: '左區' }

// 隊員名單，依「畫面位置」排列（同 web 版：上排 1 2、下排 4 3），發球者前面加 🏸
// 上排 🅰️ 為鏡像：畫面左 = 自己的右發球區；下排 🅱️：畫面右 = 自己的右發球區
function renderPlayers(match, teamIndex, serving) {
	const team = match.teams[teamIndex]
	let ordered = team.players
	if (team.players.length === 2) {
		const rightPlayer = team.players[team.right]
		const leftPlayer = team.players[1 - team.right]
		ordered = teamIndex === 0 ? [rightPlayer, leftPlayer] : [leftPlayer, rightPlayer]
	}
	return ordered
		.map((name) => {
			const isServer = serving && serving.team === teamIndex && serving.server === name
			return `${isServer ? '🏸' : ''}${escapeHtml(name)}`
		})
		.join(' / ')
}

export function renderText(match, { ended = false } = {}) {
	const serving = getServing(match)
	const winner = getWinner(match)
	const lines = []

	lines.push(`🏸 <b>羽球記分板</b>　${isDoubles(match) ? '雙打' : '單打'}・${match.target} 分制`)
	lines.push('')

	for (const teamIndex of [0, 1]) {
		const marker = winner === teamIndex ? ' 🏆' : ''
		lines.push(
			`${TEAM_ICON[teamIndex]} ${renderPlayers(match, teamIndex, serving)}　<b>${match.score[teamIndex]}</b>${marker}`,
		)
	}
	lines.push('')

	const hasPoints = (match.scoreList ?? []).length > 0
	if (ended) {
		if (match.historyId) lines.push(`⏹ 已結束　📝 已存入歷史戰績 #${match.historyId}`)
		else if (hasPoints && !match.finished) lines.push('⏹ 已結束（未結算，未存入戰績）')
		else lines.push('⏹ 已結束')
	} else if (match.confirmEnd) {
		if (match.finished) lines.push('❓ <b>確定要結束嗎？</b>會把這場寫入歷史戰績')
		else if (hasPoints) lines.push('❓ <b>確定要結束嗎？</b>比賽未結算，不會寫入戰績（要存請先按 ⏱ 結算）')
		else lines.push('❓ <b>確定要結束嗎？</b>')
	} else if (match.settled) {
		const result = winner !== null ? `${TEAM_ICON[winner]} 獲勝` : '平手'
		lines.push(`⏱ 時間到結算　${match.score[0]} : ${match.score[1]}　${result}`)
	} else if (winner !== null) {
		lines.push(`🎉 ${TEAM_ICON[winner]} 獲勝！　${match.score[0]} : ${match.score[1]}`)
	} else if (!serving) {
		lines.push('👉 請先選擇由哪一隊先發球')
	} else {
		lines.push(
			`發球：${TEAM_ICON[serving.team]} <b>${escapeHtml(serving.server)}</b>（${COURT_LABEL[serving.court]}）` +
				`　接發：${escapeHtml(serving.receiver)}`,
		)
	}

	return lines.join('\n')
}

// callback_data 格式：sc:<action>
const btn = (text, action) => ({ text, callback_data: `sc:${action}` })

export function renderKeyboard(match, { ended = false } = {}) {
	if (ended) return { inline_keyboard: [] }
	const rows = buildKeyboardRows(match)
	if (match.confirmEnd) {
		// 兩段式確認：把「結束」換成「確定結束 / 取消」
		return {
			inline_keyboard: rows.map((row) =>
				row.some((b) => b.callback_data === 'sc:end')
					? [btn('✅ 確定結束', 'end'), btn('↩️ 取消', 'endcancel')]
					: row,
			),
		}
	}
	return { inline_keyboard: rows }
}

function buildKeyboardRows(match) {

	if (match.finished) {
		return [
			[btn('↩️ 上一步', 'undo'), btn('🔄 再一局', 'reset')],
			[btn('🏁 結束', 'end')],
		]
	}

	if (match.server === null) {
		const rows = [[btn('🅰️ 先發球', 'srv0'), btn('🅱️ 先發球', 'srv1')]]
		if (isDoubles(match)) {
			rows.push([btn('🔀 🅰️ 換位', 'swap0'), btn('🔀 🅱️ 換位', 'swap1')])
		}
		rows.push([btn('🏁 結束', 'end')])
		return rows
	}

	return [
		[btn('🅰️ +1', 'pt0'), btn('🅱️ +1', 'pt1')],
		[btn('↩️ 上一步', 'undo'), btn('🔄 重新開始', 'reset')],
		[btn('⏱ 結算', 'settle'), btn('🏁 結束', 'end')],
	]
}

// ---------- 選人（/記分 無參數：從今日出席名單點選 1→4） ----------
const PICK_NUM = ['1️⃣', '2️⃣', '3️⃣', '4️⃣']

export function renderPickerText(picker) {
	const slot = (i) => (picker.picked[i] != null ? escapeHtml(picker.names[picker.picked[i]]) : '—')
	const lines = [
		`🏸 <b>選擇上場人員</b>　依 1 → 4 順序點選（今日出席 ${picker.names.length} 人）`,
		'',
		`🅰️ 1️⃣ ${slot(0)}　2️⃣ ${slot(1)}`,
		`🅱️ 4️⃣ ${slot(3)}　3️⃣ ${slot(2)}`,
		'',
	]
	if (picker.picked.length === 0) lines.push('👉 點名字加入；1、2 一隊，3、4 一隊（位置同 web 版：上 1 2／下 4 3）；點滿 4 人自動開局')
	else if (picker.picked.length === 2) lines.push('👉 繼續點第 3、4 位，或按「單打開始」')
	else if (picker.picked.length < 4) lines.push(`👉 繼續點第 ${picker.picked.length + 1} 位`)
	return lines.join('\n')
}

export function renderPickerKeyboard(picker) {
	const rows = []
	const perRow = picker.names.length > 8 ? 3 : 2
	let row = []
	picker.names.forEach((name, i) => {
		const order = picker.picked.indexOf(i)
		const label = order >= 0 ? `${PICK_NUM[order]} ${name}` : name
		row.push({ text: label, callback_data: `sc:pick${i}` })
		if (row.length === perRow) {
			rows.push(row)
			row = []
		}
	})
	if (row.length) rows.push(row)

	const controls = []
	if (picker.picked.length > 0) controls.push({ text: '↩️ 取消上一位', callback_data: 'sc:unpick' })
	if (picker.picked.length === 2) controls.push({ text: '▶️ 單打開始', callback_data: 'sc:pickgo' })
	controls.push({ text: '✖️ 取消', callback_data: 'sc:end' })
	rows.push(controls)
	return { inline_keyboard: rows }
}