"""pip_config 模块单测 — 纯逻辑，无外部依赖."""

from __future__ import annotations

import pytest

from packages.domain.pip_config import (
    ANIMATION_FADE,
    ANIMATION_SCALE,
    ANIMATION_SLIDE_BOTTOM,
    ANIMATION_SLIDE_LEFT,
    ANIMATION_SLIDE_RIGHT,
    ANIMATION_SLIDE_TOP,
    POSITION_BOTTOM_LEFT,
    POSITION_BOTTOM_RIGHT,
    POSITION_CENTER,
    POSITION_CENTER_LEFT,
    POSITION_CENTER_RIGHT,
    POSITION_TOP_CENTER,
    POSITION_TOP_LEFT,
    POSITION_TOP_RIGHT,
    PiPConfig,
    PiPLayerConfig,
    calculate_pip_position,
    parse_size_value,
)

# ── PiPLayerConfig 默认值 ────────────────────────────────────────────────────


class TestPiPLayerConfigDefaults:
    def test_default_values(self):
        cfg = PiPLayerConfig()
        assert cfg.source == ""
        assert cfg.source_type == "asset_id"
        assert cfg.position == POSITION_BOTTOM_RIGHT
        assert cfg.x == 0
        assert cfg.y == 0
        assert cfg.margin == 20
        assert cfg.width == "25%"
        assert cfg.height == ""
        assert cfg.opacity == 1.0
        assert cfg.corner_radius == 0
        assert cfg.border_width == 0
        assert cfg.border_color == "white"
        assert cfg.start_time == 0.0
        assert cfg.duration == 0.0
        assert cfg.animation_in == ""
        assert cfg.animation_out == ""
        assert cfg.animation_duration == 0.5
        assert cfg.z_index == 1


# ── PiPLayerConfig.validate ──────────────────────────────────────────────────


class TestPiPLayerConfigValidate:
    def test_valid_config(self):
        cfg = PiPLayerConfig(source="asset_123")
        ok, err = cfg.validate()
        assert ok is True
        assert err == ""

    def test_empty_source_invalid(self):
        cfg = PiPLayerConfig(source="")
        ok, err = cfg.validate()
        assert ok is False
        assert "source" in err

    def test_invalid_position(self):
        cfg = PiPLayerConfig(source="a", position="invalid_pos")
        ok, err = cfg.validate()
        assert ok is False
        assert "position" in err

    def test_custom_position_valid(self):
        cfg = PiPLayerConfig(source="a", position="custom", x=10, y=20)
        ok, err = cfg.validate()
        assert ok is True

    def test_opacity_too_low(self):
        cfg = PiPLayerConfig(source="a", opacity=-0.1)
        ok, err = cfg.validate()
        assert ok is False
        assert "opacity" in err

    def test_opacity_too_high(self):
        cfg = PiPLayerConfig(source="a", opacity=1.5)
        ok, err = cfg.validate()
        assert ok is False
        assert "opacity" in err

    def test_opacity_boundary_zero(self):
        cfg = PiPLayerConfig(source="a", opacity=0.0)
        ok, _ = cfg.validate()
        assert ok is True

    def test_opacity_boundary_one(self):
        cfg = PiPLayerConfig(source="a", opacity=1.0)
        ok, _ = cfg.validate()
        assert ok is True

    def test_negative_corner_radius(self):
        cfg = PiPLayerConfig(source="a", corner_radius=-5)
        ok, err = cfg.validate()
        assert ok is False
        assert "corner_radius" in err

    def test_negative_start_time(self):
        cfg = PiPLayerConfig(source="a", start_time=-1.0)
        ok, err = cfg.validate()
        assert ok is False
        assert "start_time" in err

    def test_negative_duration(self):
        cfg = PiPLayerConfig(source="a", duration=-2.0)
        ok, err = cfg.validate()
        assert ok is False
        assert "duration" in err

    def test_zero_duration_valid(self):
        cfg = PiPLayerConfig(source="a", duration=0.0)
        ok, _ = cfg.validate()
        assert ok is True

    def test_invalid_animation_in(self):
        cfg = PiPLayerConfig(source="a", animation_in="invalid")
        ok, err = cfg.validate()
        assert ok is False
        assert "入场动画" in err

    def test_invalid_animation_out(self):
        cfg = PiPLayerConfig(source="a", animation_out="invalid")
        ok, err = cfg.validate()
        assert ok is False
        assert "出场动画" in err

    def test_valid_animation_fade(self):
        cfg = PiPLayerConfig(source="a", animation_in=ANIMATION_FADE, animation_out=ANIMATION_FADE)
        ok, _ = cfg.validate()
        assert ok is True

    def test_valid_animation_slide(self):
        cfg = PiPLayerConfig(
            source="a",
            animation_in=ANIMATION_SLIDE_LEFT,
            animation_out=ANIMATION_SLIDE_RIGHT,
        )
        ok, _ = cfg.validate()
        assert ok is True

    def test_valid_animation_scale(self):
        cfg = PiPLayerConfig(source="a", animation_in=ANIMATION_SCALE)
        ok, _ = cfg.validate()
        assert ok is True

    def test_empty_animation_valid(self):
        cfg = PiPLayerConfig(source="a", animation_in="", animation_out="")
        ok, _ = cfg.validate()
        assert ok is True

    def test_negative_animation_duration(self):
        cfg = PiPLayerConfig(source="a", animation_duration=-0.5)
        ok, err = cfg.validate()
        assert ok is False
        assert "animation_duration" in err


# ── PiPConfig.from_dict ──────────────────────────────────────────────────────


class TestPiPConfigFromDict:
    def test_none_data_disabled(self):
        cfg = PiPConfig.from_dict(None)
        assert cfg.enabled is False
        assert cfg.layers == []

    def test_empty_dict_disabled(self):
        cfg = PiPConfig.from_dict({})
        assert cfg.enabled is False
        assert cfg.layers == []

    def test_enabled_false(self):
        cfg = PiPConfig.from_dict({"enabled": False, "layers": [{"source": "a"}]})
        assert cfg.enabled is False
        assert cfg.layers == []

    def test_single_layer(self):
        cfg = PiPConfig.from_dict(
            {
                "enabled": True,
                "layers": [{"source": "asset_1"}],
            }
        )
        assert cfg.enabled is True
        assert cfg.layer_count == 1
        assert cfg.layers[0].source == "asset_1"

    def test_multiple_layers_sorted_by_z_index(self):
        cfg = PiPConfig.from_dict(
            {
                "enabled": True,
                "layers": [
                    {"source": "top", "z_index": 10},
                    {"source": "bottom", "z_index": 1},
                    {"source": "mid", "z_index": 5},
                ],
            }
        )
        assert cfg.layer_count == 3
        assert [layer.source for layer in cfg.layers] == ["bottom", "mid", "top"]

    def test_invalid_layer_skipped(self):
        cfg = PiPConfig.from_dict(
            {
                "enabled": True,
                "layers": [
                    {"source": "valid"},
                    {"source": ""},  # 无效：空source
                ],
            }
        )
        assert cfg.layer_count == 1
        assert cfg.layers[0].source == "valid"

    def test_all_invalid_layers_disabled(self):
        cfg = PiPConfig.from_dict(
            {
                "enabled": True,
                "layers": [
                    {"source": ""},
                    {"source": "", "opacity": 2.0},
                ],
            }
        )
        assert cfg.enabled is False
        assert cfg.layer_count == 0

    def test_layer_parse_error_skipped(self):
        cfg = PiPConfig.from_dict(
            {
                "enabled": True,
                "layers": [
                    {"source": "valid"},
                    {"source": "bad_margin", "margin": "not_a_number"},
                ],
            }
        )
        assert cfg.layer_count == 1

    def test_layer_full_fields(self):
        cfg = PiPConfig.from_dict(
            {
                "enabled": True,
                "layers": [
                    {
                        "source": "asset_1",
                        "source_type": "url",
                        "position": "top_left",
                        "x": 10,
                        "y": 20,
                        "margin": 30,
                        "width": "30%",
                        "height": "20%",
                        "opacity": 0.8,
                        "corner_radius": 10,
                        "border_width": 2,
                        "border_color": "black",
                        "start_time": 1.5,
                        "duration": 5.0,
                        "animation_in": "fade",
                        "animation_out": "slide_right",
                        "animation_duration": 0.8,
                        "z_index": 3,
                    }
                ],
            }
        )
        assert cfg.layer_count == 1
        layer = cfg.layers[0]
        assert layer.source == "asset_1"
        assert layer.source_type == "url"
        assert layer.position == "top_left"
        assert layer.margin == 30
        assert layer.width == "30%"
        assert layer.opacity == 0.8
        assert layer.corner_radius == 10
        assert layer.start_time == 1.5
        assert layer.duration == 5.0
        assert layer.animation_in == "fade"
        assert layer.z_index == 3

    def test_empty_layers_list(self):
        cfg = PiPConfig.from_dict({"enabled": True, "layers": []})
        assert cfg.enabled is False
        assert cfg.layer_count == 0


# ── PiPConfig 属性 ───────────────────────────────────────────────────────────


class TestPiPConfigProperties:
    def test_layer_count_empty(self):
        cfg = PiPConfig()
        assert cfg.layer_count == 0

    def test_max_z_index_empty(self):
        cfg = PiPConfig()
        assert cfg.max_z_index == 0

    def test_max_z_index_multiple(self):
        cfg = PiPConfig(
            layers=[
                PiPLayerConfig(source="a", z_index=3),
                PiPLayerConfig(source="b", z_index=7),
                PiPLayerConfig(source="c", z_index=2),
            ]
        )
        assert cfg.max_z_index == 7


# ── parse_size_value ─────────────────────────────────────────────────────────


class TestParseSizeValue:
    def test_int_value(self):
        assert parse_size_value(100, 1920) == 100

    def test_int_value_zero_bumped_to_one(self):
        assert parse_size_value(0, 1920) == 1

    def test_int_negative_bumped_to_one(self):
        assert parse_size_value(-5, 1920) == 1

    def test_percentage_string(self):
        assert parse_size_value("50%", 1920) == 960

    def test_percentage_25pct(self):
        assert parse_size_value("25%", 1920) == 480

    def test_percentage_small(self):
        assert parse_size_value("1%", 1920) == 19

    def test_percentage_zero_bumped(self):
        assert parse_size_value("0%", 1920) == 1

    def test_invalid_percentage_fallback(self):
        assert parse_size_value("abc%", 1920) == 480  # 25% default

    def test_numeric_string(self):
        assert parse_size_value("200", 1920) == 200

    def test_invalid_string_fallback(self):
        assert parse_size_value("invalid", 1920) == 480

    def test_custom_default_pct(self):
        assert parse_size_value("bad", 1000, default_pct=0.5) == 500

    def test_none_fallback(self):
        assert parse_size_value(None, 1920) == 480  # type: ignore[arg-type]

    def test_float_int_conversion(self):
        # float 不是 int，会走到 try int(value) 分支
        result = parse_size_value(150.0, 1920)  # type: ignore[arg-type]
        assert result == 150


# ── calculate_pip_position ───────────────────────────────────────────────────


class TestCalculatePipPosition:
    W = 1920
    H = 1080
    PW = 300  # pip width
    PH = 200  # pip height
    M = 20  # margin

    def test_top_left(self):
        x, y = calculate_pip_position(POSITION_TOP_LEFT, self.W, self.H, self.PW, self.PH, self.M)
        assert (x, y) == (20, 20)

    def test_top_center(self):
        x, y = calculate_pip_position(POSITION_TOP_CENTER, self.W, self.H, self.PW, self.PH, self.M)
        assert x == (self.W - self.PW) // 2
        assert y == self.M

    def test_top_right(self):
        x, y = calculate_pip_position(POSITION_TOP_RIGHT, self.W, self.H, self.PW, self.PH, self.M)
        assert x == self.W - self.PW - self.M
        assert y == self.M

    def test_center_left(self):
        x, y = calculate_pip_position(POSITION_CENTER_LEFT, self.W, self.H, self.PW, self.PH, self.M)
        assert x == self.M
        assert y == (self.H - self.PH) // 2

    def test_center(self):
        x, y = calculate_pip_position(POSITION_CENTER, self.W, self.H, self.PW, self.PH, self.M)
        assert x == (self.W - self.PW) // 2
        assert y == (self.H - self.PH) // 2

    def test_center_right(self):
        x, y = calculate_pip_position(POSITION_CENTER_RIGHT, self.W, self.H, self.PW, self.PH, self.M)
        assert x == self.W - self.PW - self.M
        assert y == (self.H - self.PH) // 2

    def test_bottom_left(self):
        x, y = calculate_pip_position(POSITION_BOTTOM_LEFT, self.W, self.H, self.PW, self.PH, self.M)
        assert x == self.M
        assert y == self.H - self.PH - self.M

    def test_bottom_center(self):
        x, y = calculate_pip_position(POSITION_BOTTOM_RIGHT, self.W, self.H, self.PW, self.PH, self.M)
        # bottom_right 用作 fallback 默认值
        assert x == self.W - self.PW - self.M
        assert y == self.H - self.PH - self.M

    def test_bottom_right(self):
        x, y = calculate_pip_position(POSITION_BOTTOM_RIGHT, self.W, self.H, self.PW, self.PH, self.M)
        assert x == self.W - self.PW - self.M
        assert y == self.H - self.PH - self.M

    def test_invalid_position_falls_back_to_bottom_right(self):
        x, y = calculate_pip_position("unknown_pos", self.W, self.H, self.PW, self.PH, self.M)
        assert x == self.W - self.PW - self.M
        assert y == self.H - self.PH - self.M

    def test_custom_int_coordinates(self):
        x, y = calculate_pip_position("custom", self.W, self.H, self.PW, self.PH, custom_x=100, custom_y=200)
        assert (x, y) == (100, 200)

    def test_custom_percentage_coordinates(self):
        x, y = calculate_pip_position("custom", self.W, self.H, self.PW, self.PH, custom_x="10%", custom_y="20%")
        assert x == int(1920 * 0.1)
        assert y == int(1080 * 0.2)

    def test_custom_zero_margin_ignored(self):
        # custom 模式下 margin 参数不影响
        x, y = calculate_pip_position("custom", self.W, self.H, self.PW, self.PH, margin=100, custom_x=50, custom_y=60)
        assert (x, y) == (50, 60)

    def test_default_margin(self):
        # margin 不传默认为 20
        x, y = calculate_pip_position(POSITION_TOP_LEFT, self.W, self.H, self.PW, self.PH)
        assert (x, y) == (20, 20)

    def test_large_margin(self):
        x, y = calculate_pip_position(POSITION_TOP_LEFT, self.W, self.H, self.PW, self.PH, margin=50)
        assert (x, y) == (50, 50)

    def test_small_output_large_pip(self):
        # 极端情况：pip比输出还大，位置计算仍能给出值
        x, y = calculate_pip_position(POSITION_CENTER, 100, 100, 200, 200, 10)
        assert x == (100 - 200) // 2
        assert y == (100 - 200) // 2


# ── 常量导出验证 ─────────────────────────────────────────────────────────────


class TestConstants:
    def test_nine_position_constants_exist(self):
        positions = [
            POSITION_TOP_LEFT,
            POSITION_TOP_CENTER,
            POSITION_TOP_RIGHT,
            POSITION_CENTER_LEFT,
            POSITION_CENTER,
            POSITION_CENTER_RIGHT,
            POSITION_BOTTOM_LEFT,
            POSITION_BOTTOM_RIGHT,
        ]
        # bottom_center 也存在
        from packages.domain.pip_config import POSITION_BOTTOM_CENTER

        positions.append(POSITION_BOTTOM_CENTER)
        assert len(positions) == 9
        assert len(set(positions)) == 9  # 互不相同

    def test_animation_constants_exist(self):
        animations = [
            ANIMATION_FADE,
            ANIMATION_SLIDE_LEFT,
            ANIMATION_SLIDE_RIGHT,
            ANIMATION_SLIDE_TOP,
            ANIMATION_SLIDE_BOTTOM,
            ANIMATION_SCALE,
        ]
        assert len(set(animations)) == 6