package ddz

import "testing"

// TestBidRobFlow 叫地主 → 抢地主 → 确定地主的完整流程与倍数计算
func TestBidRobFlow(t *testing.T) {
	g := NewGame()
	g.Turn = 0
	g.BidStart = 0
	// 座位 0 叫地主 → 进入抢地主，轮到座位 1
	if _, err := g.Bid(0, true); err != nil {
		t.Fatal(err)
	}
	if g.Phase != PhaseRobbing || g.Turn != 1 || g.Landlord != 0 || g.Multiplier != 1 {
		t.Fatalf("叫地主后状态异常：phase=%s turn=%d landlord=%d mult=%d", g.Phase, g.Turn, g.Landlord, g.Multiplier)
	}
	// 座位 1 抢地主 → 地主候选换成 1，倍数×2，轮到座位 2
	if err := g.Rob(1, true); err != nil {
		t.Fatal(err)
	}
	if g.Landlord != 1 || g.Multiplier != 2 || g.Turn != 2 {
		t.Fatalf("抢地主后状态异常：landlord=%d mult=%d turn=%d", g.Landlord, g.Multiplier, g.Turn)
	}
	// 座位 2 不抢 → 地主确定为 1，底牌并入（20张），进入出牌阶段
	if err := g.Rob(2, false); err != nil {
		t.Fatal(err)
	}
	if g.Phase != PhasePlaying || g.Landlord != 1 || g.Turn != 1 {
		t.Fatalf("抢地主结束后状态异常：phase=%s landlord=%d turn=%d", g.Phase, g.Landlord, g.Turn)
	}
	if len(g.Hands[1]) != 20 {
		t.Fatalf("地主应有 20 张手牌，实际 %d", len(g.Hands[1]))
	}
}

// TestRobNonePass 两家都不抢：首叫者当地主，倍数不变
func TestRobNonePass(t *testing.T) {
	g := NewGame()
	g.Turn = 2
	g.BidStart = 2
	g.Bid(2, true)
	if g.Turn != 0 {
		t.Fatalf("抢地主应从下家开始，实际 turn=%d", g.Turn)
	}
	g.Rob(0, false)
	if g.Turn != 1 {
		t.Fatalf("第二位抢地主表态者应为座位 1，实际 %d", g.Turn)
	}
	g.Rob(1, false)
	if g.Phase != PhasePlaying || g.Landlord != 2 || g.Multiplier != 1 {
		t.Fatalf("两家不抢后状态异常：phase=%s landlord=%d mult=%d", g.Phase, g.Landlord, g.Multiplier)
	}
}

// TestRedealWhenAllPass 三家都不叫应重新发牌
func TestRedealWhenAllPass(t *testing.T) {
	g := NewGame()
	start := g.Turn
	for i := 0; i < 2; i++ {
		redeal, err := g.Bid(g.Turn, false)
		if err != nil || redeal {
			t.Fatalf("前两家不叫不应触发重发：redeal=%v err=%v", redeal, err)
		}
	}
	redeal, err := g.Bid(g.Turn, false)
	if err != nil || !redeal {
		t.Fatalf("三家都不叫应返回重发：redeal=%v err=%v（start=%d）", redeal, err, start)
	}
}

// TestSpringMultiplier 春天与反春的判定
func TestSpringMultiplier(t *testing.T) {
	// 春天：地主赢且农民从未出过牌
	g := &Game{Landlord: 0, Winner: 0, Phase: PhaseOver, Multiplier: 1}
	g.History = []PlayEvent{
		{Seat: 0, Cards: []int{1}}, {Seat: 1}, {Seat: 2},
		{Seat: 0, Cards: []int{2}}, {Seat: 1}, {Seat: 2},
	}
	if g.SpringMultiplier() != 2 {
		t.Fatalf("地主全程压制应判春天 ×2，实际 %d", g.SpringMultiplier())
	}
	// 反春：农民赢且地主只出过第一手
	g2 := &Game{Landlord: 0, Winner: 1, Phase: PhaseOver, Multiplier: 1}
	g2.History = []PlayEvent{
		{Seat: 0, Cards: []int{1}},
		{Seat: 1, Cards: []int{2}}, {Seat: 2},
		{Seat: 1, Cards: []int{3}},
	}
	if g2.SpringMultiplier() != 2 {
		t.Fatalf("地主只出一手被打完应判反春 ×2，实际 %d", g2.SpringMultiplier())
	}
	// 普通局：双方都出过多手
	g3 := &Game{Landlord: 0, Winner: 1, Phase: PhaseOver, Multiplier: 1}
	g3.History = []PlayEvent{
		{Seat: 0, Cards: []int{1}}, {Seat: 1, Cards: []int{2}},
		{Seat: 0, Cards: []int{3}}, {Seat: 1, Cards: []int{4}},
	}
	if g3.SpringMultiplier() != 1 {
		t.Fatalf("普通局春天倍数应为 1，实际 %d", g3.SpringMultiplier())
	}
}

// TestTotalMultiplier 结算总倍数 = 叫抢 × 炸弹 × 春天（含上限）
func TestTotalMultiplier(t *testing.T) {
	g := &Game{Landlord: 0, Winner: 0, Phase: PhaseOver, Multiplier: 2, Bombs: 2}
	g.History = []PlayEvent{{Seat: 0, Cards: []int{1}}, {Seat: 1, Cards: []int{2}}}
	// 2（抢1次）× 4（2个炸弹）× 1（无春天）= 8
	if got := g.TotalMultiplier(); got != 8 {
		t.Fatalf("总倍数应为 8，实际 %d", got)
	}
	// 上限保护：巨量炸弹也不超过 64
	g.Bombs = 10
	if got := g.TotalMultiplier(); got != 64 {
		t.Fatalf("总倍数应封顶 64，实际 %d", got)
	}
}