"""积分消耗规则单元测试 (#1895)"""

from __future__ import annotations

import math

import pytest

from packages.domain.points_rules import (
    DAILY_FREE_CLIP_LIMIT,
    FREE_USER_MULTIPLIER,
    MEMBER_DISCOUNT,
    MEMBERSHIP_PRICES,
    POINTS_PACKAGES,
    POINTS_SCENES,
    calculate_points_cost,
)


class TestPointsScenesConfig:
    """场景配置完整性"""

    def test_all_nine_scenes_defined(self):
        assert len(POINTS_SCENES) == 9

    def test_required_keys_present(self):
        for key, scene in POINTS_SCENES.items():
            assert "base_points" in scene, f"{key} missing base_points"
            assert "unit" in scene, f"{key} missing unit"
            assert "name" in scene, f"{key} missing name"

    def test_voice_clone_train_is_free(self):
        assert POINTS_SCENES["voice_clone_train"]["base_points"] == 0

    def test_ai_video_has_extra_per_30s(self):
        assert POINTS_SCENES["ai_video"]["extra_per_30s"] == 1


class TestPointsPackages:
    def test_three_packages(self):
        assert len(POINTS_PACKAGES) == 3
        assert POINTS_PACKAGES["starter_pack"]["points"] == 100
        assert POINTS_PACKAGES["basic_pack"]["points"] == 500
        assert POINTS_PACKAGES["pro_pack"]["points"] == 2000


class TestMembershipPrices:
    def test_three_plans(self):
        assert len(MEMBERSHIP_PRICES) == 3
        assert MEMBERSHIP_PRICES["monthly"]["price_cents"] == 1990
        assert MEMBERSHIP_PRICES["quarterly"]["duration_days"] == 90
        assert MEMBERSHIP_PRICES["yearly"]["price_cents"] == 15900


class TestDailyFreeLimit:
    def test_limit_is_2(self):
        assert DAILY_FREE_CLIP_LIMIT == 2


class TestCalculatePointsCost:
    """核心计费逻辑"""

    # ── 按次计费 ──

    def test_per_time_base_cost(self):
        # ai_rewrite: 1积分/次，免费用户 ceil(1 * 1.15) = 2
        cost = calculate_points_cost("ai_rewrite", is_member=False, quantity=1)
        assert cost == math.ceil(1 * FREE_USER_MULTIPLIER)

    def test_per_time_multiple(self):
        # ai_cover: 1积分/张，3张 → base=3, free: ceil(3*1.15)=4
        cost = calculate_points_cost("ai_cover", is_member=False, quantity=3)
        assert cost == math.ceil(3 * FREE_USER_MULTIPLIER)

    # ── 按时长计费 ──

    def test_per_minute_base(self):
        # ai_voice: 1积分/分钟，3分钟 → base=3, free: ceil(3*1.15)=4
        cost = calculate_points_cost("ai_voice", is_member=False, duration_minutes=3)
        assert cost == math.ceil(3 * FREE_USER_MULTIPLIER)

    def test_per_minute_rounds_up(self):
        # 2.3分钟 → ceil(2.3)=3分钟 → base=3
        cost = calculate_points_cost("ai_voice", is_member=False, duration_minutes=2.3)
        assert cost == math.ceil(3 * FREE_USER_MULTIPLIER)

    def test_digital_human_expensive(self):
        # ai_digital_human: 15积分/分钟，1分钟 → base=15, free: ceil(15*1.15)=18
        cost = calculate_points_cost("ai_digital_human", is_member=False, duration_minutes=1)
        assert cost == 18

    # ── 免费场景 ──

    def test_voice_clone_train_free(self):
        cost = calculate_points_cost("voice_clone_train", is_member=False)
        assert cost == 0

    def test_voice_clone_train_free_for_member(self):
        cost = calculate_points_cost("voice_clone_train", is_member=True)
        assert cost == 0

    # ── 混剪额外逻辑 ──

    def test_ai_video_short_no_extra(self):
        # 20s (0.33min) ≤ 30s，不额外加积分，base=3, free: ceil(3*1.15)=4
        cost = calculate_points_cost("ai_video", is_member=False, quantity=1, duration_minutes=0.33)
        assert cost == math.ceil(3 * FREE_USER_MULTIPLIER)

    def test_ai_video_long_extra_charge(self):
        # 80s → base=3 + extra ceil((80-30)/30)=2 → total_base=5, free: ceil(5*1.15)=6
        cost = calculate_points_cost("ai_video", is_member=False, quantity=1, duration_minutes=80 / 60)
        assert cost == math.ceil(5 * FREE_USER_MULTIPLIER)

    # ── 会员折扣 ──

    def test_monthly_member_discount(self):
        # ai_voice 1分钟 base=1, 月卡0.9 → floor(1*0.9)=1 → max(1,1)=1
        cost = calculate_points_cost("ai_voice", is_member=True, duration_minutes=1, member_type="monthly")
        assert cost == max(1, math.floor(1 * 0.9))

    def test_yearly_member_deep_discount(self):
        # ai_digital_human 2分钟 base=30, 年卡0.8 → floor(30*0.8)=24
        cost = calculate_points_cost(
            "ai_digital_human",
            is_member=True,
            duration_minutes=2,
            member_type="yearly",
        )
        assert cost == max(1, math.floor(30 * 0.8))

    def test_member_without_type_no_discount(self):
        # is_member=True 但没传 member_type → 不按会员折扣
        cost = calculate_points_cost("ai_voice", is_member=True, duration_minutes=1)
        assert cost == 1  # base=1, no discount applied

    # ── 异常 ──

    def test_unknown_scene_raises(self):
        with pytest.raises(ValueError, match="Unknown points scene"):
            calculate_points_cost("nonexistent_scene", is_member=False)