"""
Deep behavioral tests for card interaction patterns.
Tests view tracking, voting, research interactions,
sharing, and interaction aggregation logic.
"""

from datetime import datetime, timezone, timedelta


# --- View interaction patterns ---


class TestViewInteractionTracking:
    """Tests for view interaction tracking."""

    def _record_view(self, interaction):
        """Record a view interaction."""
        interaction["viewed"] = True
        interaction["views"] = interaction.get("views", 0) + 1
        interaction["last_viewed"] = datetime.now(timezone.utc)
        return interaction

    def test_sets_viewed_true(self):
        interaction = {}
        result = self._record_view(interaction)
        assert result["viewed"] is True

    def test_increments_view_count(self):
        interaction = {"views": 5}
        result = self._record_view(interaction)
        assert result["views"] == 6

    def test_initializes_view_count(self):
        interaction = {}
        result = self._record_view(interaction)
        assert result["views"] == 1

    def test_sets_last_viewed(self):
        interaction = {}
        before = datetime.now(timezone.utc)
        result = self._record_view(interaction)
        after = datetime.now(timezone.utc)
        assert before <= result["last_viewed"] <= after

    def test_multiple_views(self):
        interaction = {}
        for _ in range(5):
            interaction = self._record_view(interaction)
        assert interaction["views"] == 5


# --- Vote interaction patterns ---


class TestVoteUpInteraction:
    """Tests for vote up interaction."""

    def _record_vote_up(self, interaction):
        """Record a vote up interaction."""
        interaction["voted"] = "up"
        interaction["votes_up"] = interaction.get("votes_up", 0) + 1
        return interaction

    def test_sets_voted_up(self):
        interaction = {}
        result = self._record_vote_up(interaction)
        assert result["voted"] == "up"

    def test_increments_votes_up(self):
        interaction = {"votes_up": 3}
        result = self._record_vote_up(interaction)
        assert result["votes_up"] == 4

    def test_initializes_votes_up(self):
        interaction = {}
        result = self._record_vote_up(interaction)
        assert result["votes_up"] == 1


class TestVoteDownInteraction:
    """Tests for vote down interaction."""

    def _record_vote_down(self, interaction):
        """Record a vote down interaction."""
        interaction["voted"] = "down"
        interaction["votes_down"] = interaction.get("votes_down", 0) + 1
        return interaction

    def test_sets_voted_down(self):
        interaction = {}
        result = self._record_vote_down(interaction)
        assert result["voted"] == "down"

    def test_increments_votes_down(self):
        interaction = {"votes_down": 2}
        result = self._record_vote_down(interaction)
        assert result["votes_down"] == 3

    def test_initializes_votes_down(self):
        interaction = {}
        result = self._record_vote_down(interaction)
        assert result["votes_down"] == 1


class TestVoteToggle:
    """Tests for vote toggle behavior."""

    def _toggle_vote(self, interaction, new_vote):
        """Toggle vote from current to new."""
        old_vote = interaction.get("voted")
        if old_vote == new_vote:
            # Remove vote
            interaction["voted"] = None
            return "removed"
        else:
            interaction["voted"] = new_vote
            return "changed"

    def test_toggle_same_removes(self):
        interaction = {"voted": "up"}
        result = self._toggle_vote(interaction, "up")
        assert result == "removed"
        assert interaction["voted"] is None

    def test_toggle_different_changes(self):
        interaction = {"voted": "up"}
        result = self._toggle_vote(interaction, "down")
        assert result == "changed"
        assert interaction["voted"] == "down"

    def test_toggle_from_none(self):
        interaction = {"voted": None}
        result = self._toggle_vote(interaction, "up")
        assert result == "changed"
        assert interaction["voted"] == "up"


# --- Research interaction patterns ---


class TestResearchInteraction:
    """Tests for research interaction tracking."""

    def _record_research(self, interaction):
        """Record a research interaction."""
        interaction["researched"] = True
        interaction["research_count"] = interaction.get("research_count", 0) + 1
        interaction["last_researched"] = datetime.now(timezone.utc)
        return interaction

    def test_sets_researched_true(self):
        interaction = {}
        result = self._record_research(interaction)
        assert result["researched"] is True

    def test_increments_research_count(self):
        interaction = {"research_count": 2}
        result = self._record_research(interaction)
        assert result["research_count"] == 3

    def test_initializes_research_count(self):
        interaction = {}
        result = self._record_research(interaction)
        assert result["research_count"] == 1

    def test_sets_last_researched(self):
        interaction = {}
        result = self._record_research(interaction)
        assert "last_researched" in result


# --- Share interaction patterns ---


class TestShareInteraction:
    """Tests for share interaction tracking."""

    def _record_share(self, interaction, platform=None):
        """Record a share interaction."""
        interaction["shared"] = True
        interaction["share_count"] = interaction.get("share_count", 0) + 1
        if platform:
            platforms = interaction.get("share_platforms", [])
            if platform not in platforms:
                platforms.append(platform)
            interaction["share_platforms"] = platforms
        return interaction

    def test_sets_shared_true(self):
        interaction = {}
        result = self._record_share(interaction)
        assert result["shared"] is True

    def test_increments_share_count(self):
        interaction = {"share_count": 1}
        result = self._record_share(interaction)
        assert result["share_count"] == 2

    def test_tracks_platform(self):
        interaction = {}
        result = self._record_share(interaction, "twitter")
        assert "twitter" in result["share_platforms"]

    def test_no_duplicate_platforms(self):
        interaction = {"share_platforms": ["twitter"]}
        result = self._record_share(interaction, "twitter")
        result = self._record_share(result, "twitter")
        assert result["share_platforms"].count("twitter") == 1


# --- Interaction metadata patterns ---


class TestInteractionMetadata:
    """Tests for interaction metadata attachment."""

    def _attach_metadata(self, interaction, interaction_type, metadata):
        """Attach metadata to an interaction."""
        if metadata:
            key = f"{interaction_type}_metadata"
            interaction[key] = metadata
        return interaction

    def test_attaches_view_metadata(self):
        interaction = {}
        metadata = {"source": "feed", "position": 3}
        result = self._attach_metadata(interaction, "view", metadata)
        assert result["view_metadata"]["source"] == "feed"

    def test_attaches_vote_metadata(self):
        interaction = {}
        metadata = {"reason": "helpful"}
        result = self._attach_metadata(interaction, "vote", metadata)
        assert result["vote_metadata"]["reason"] == "helpful"

    def test_no_metadata(self):
        interaction = {}
        result = self._attach_metadata(interaction, "view", None)
        assert "view_metadata" not in result


# --- Interaction aggregation patterns ---


class TestInteractionAggregation:
    """Tests for interaction aggregation across users."""

    def _aggregate_interactions(self, interactions):
        """Aggregate interactions from multiple users."""
        total_views = sum(i.get("views", 0) for i in interactions)
        total_up = sum(i.get("votes_up", 0) for i in interactions)
        total_down = sum(i.get("votes_down", 0) for i in interactions)
        unique_viewers = len([i for i in interactions if i.get("viewed")])
        return {
            "total_views": total_views,
            "votes_up": total_up,
            "votes_down": total_down,
            "unique_viewers": unique_viewers,
        }

    def test_sums_views(self):
        interactions = [{"views": 10}, {"views": 5}, {"views": 3}]
        result = self._aggregate_interactions(interactions)
        assert result["total_views"] == 18

    def test_sums_votes_up(self):
        interactions = [{"votes_up": 2}, {"votes_up": 3}]
        result = self._aggregate_interactions(interactions)
        assert result["votes_up"] == 5

    def test_sums_votes_down(self):
        interactions = [{"votes_down": 1}, {"votes_down": 2}]
        result = self._aggregate_interactions(interactions)
        assert result["votes_down"] == 3

    def test_counts_unique_viewers(self):
        interactions = [
            {"viewed": True},
            {"viewed": True},
            {"viewed": False},
        ]
        result = self._aggregate_interactions(interactions)
        assert result["unique_viewers"] == 2


class TestEngagementScore:
    """Tests for engagement score calculation."""

    def _calculate_engagement(self, views, votes_up, votes_down, shares):
        """Calculate engagement score."""
        return views + (votes_up * 2) - votes_down + (shares * 3)

    def test_views_contribute(self):
        score = self._calculate_engagement(100, 0, 0, 0)
        assert score == 100

    def test_votes_up_weighted(self):
        score = self._calculate_engagement(0, 10, 0, 0)
        assert score == 20  # 10 * 2

    def test_votes_down_subtract(self):
        score = self._calculate_engagement(0, 0, 5, 0)
        assert score == -5

    def test_shares_weighted_high(self):
        score = self._calculate_engagement(0, 0, 0, 10)
        assert score == 30  # 10 * 3

    def test_combined_score(self):
        score = self._calculate_engagement(50, 10, 5, 5)
        # 50 + 20 - 5 + 15 = 80
        assert score == 80


# --- Trending detection patterns ---


class TestTrendingDetection:
    """Tests for trending card detection."""

    def _is_trending(self, card, min_views=100, min_engagement=50):
        """Check if card is trending."""
        views = card.get("interaction", {}).get("views", 0)
        votes_up = card.get("interaction", {}).get("votes_up", 0)
        if views >= min_views and votes_up >= min_engagement:
            return True
        return False

    def test_trending_with_high_views_and_engagement(self):
        card = {"interaction": {"views": 200, "votes_up": 60}}
        assert self._is_trending(card) is True

    def test_not_trending_low_views(self):
        card = {"interaction": {"views": 50, "votes_up": 100}}
        assert self._is_trending(card) is False

    def test_not_trending_low_engagement(self):
        card = {"interaction": {"views": 200, "votes_up": 30}}
        assert self._is_trending(card) is False

    def test_boundary_values(self):
        card = {"interaction": {"views": 100, "votes_up": 50}}
        assert self._is_trending(card) is True


# --- Interaction history patterns ---


class TestInteractionHistory:
    """Tests for interaction history tracking."""

    def _add_to_history(self, history, interaction_type, timestamp=None):
        """Add an interaction to history."""
        entry = {
            "type": interaction_type,
            "timestamp": timestamp or datetime.now(timezone.utc),
        }
        history.append(entry)
        return history

    def test_adds_entry(self):
        history = []
        self._add_to_history(history, "view")
        assert len(history) == 1
        assert history[0]["type"] == "view"

    def test_multiple_entries(self):
        history = []
        self._add_to_history(history, "view")
        self._add_to_history(history, "vote_up")
        self._add_to_history(history, "share")
        assert len(history) == 3

    def test_has_timestamp(self):
        history = []
        self._add_to_history(history, "view")
        assert "timestamp" in history[0]


class TestRecentInteractions:
    """Tests for filtering recent interactions."""

    def _get_recent(self, history, hours=24):
        """Get recent interactions."""
        cutoff = datetime.now(timezone.utc) - timedelta(hours=hours)
        return [e for e in history if e.get("timestamp", cutoff) >= cutoff]

    def test_filters_recent(self):
        now = datetime.now(timezone.utc)
        old = now - timedelta(hours=48)
        history = [
            {"type": "view", "timestamp": now},
            {"type": "vote", "timestamp": old},
        ]
        recent = self._get_recent(history)
        assert len(recent) == 1

    def test_respects_hours(self):
        now = datetime.now(timezone.utc)
        old = now - timedelta(hours=12)
        history = [{"type": "view", "timestamp": old}]
        recent = self._get_recent(history, hours=24)
        assert len(recent) == 1
        recent = self._get_recent(history, hours=6)
        assert len(recent) == 0


# --- User interaction summary patterns ---


class TestUserInteractionSummary:
    """Tests for user interaction summary patterns."""

    def _build_summary(self, user_id, interactions):
        """Build interaction summary for a user."""
        total_views = sum(i.get("views", 0) for i in interactions)
        total_votes = sum(
            i.get("votes_up", 0) + i.get("votes_down", 0) for i in interactions
        )
        researched = sum(1 for i in interactions if i.get("researched"))
        return {
            "user_id": user_id,
            "total_views": total_views,
            "total_votes": total_votes,
            "items_researched": researched,
            "active_items": len(interactions),
        }

    def test_summary_has_user_id(self):
        summary = self._build_summary("user1", [])
        assert summary["user_id"] == "user1"

    def test_summary_totals_views(self):
        interactions = [{"views": 10}, {"views": 5}]
        summary = self._build_summary("user1", interactions)
        assert summary["total_views"] == 15

    def test_summary_counts_researched(self):
        interactions = [
            {"researched": True},
            {"researched": False},
            {"researched": True},
        ]
        summary = self._build_summary("user1", interactions)
        assert summary["items_researched"] == 2


# --- Interaction validation patterns ---


class TestInteractionValidation:
    """Tests for interaction validation patterns."""

    def _is_valid_interaction_type(self, interaction_type):
        """Check if interaction type is valid."""
        valid_types = ["view", "vote_up", "vote_down", "research", "share"]
        return interaction_type in valid_types

    def test_view_valid(self):
        assert self._is_valid_interaction_type("view") is True

    def test_vote_up_valid(self):
        assert self._is_valid_interaction_type("vote_up") is True

    def test_vote_down_valid(self):
        assert self._is_valid_interaction_type("vote_down") is True

    def test_research_valid(self):
        assert self._is_valid_interaction_type("research") is True

    def test_share_valid(self):
        assert self._is_valid_interaction_type("share") is True

    def test_invalid_type(self):
        assert self._is_valid_interaction_type("unknown") is False


# --- Interaction rate limiting patterns ---


class TestInteractionRateLimiting:
    """Tests for interaction rate limiting patterns."""

    def _should_rate_limit(self, interactions, max_per_hour=100):
        """Check if interactions should be rate limited."""
        now = datetime.now(timezone.utc)
        hour_ago = now - timedelta(hours=1)
        recent = [
            i for i in interactions if i.get("timestamp", hour_ago) >= hour_ago
        ]
        return len(recent) >= max_per_hour

    def test_under_limit_allowed(self):
        now = datetime.now(timezone.utc)
        interactions = [{"timestamp": now} for _ in range(50)]
        assert self._should_rate_limit(interactions) is False

    def test_at_limit_blocked(self):
        now = datetime.now(timezone.utc)
        interactions = [{"timestamp": now} for _ in range(100)]
        assert self._should_rate_limit(interactions) is True

    def test_old_interactions_dont_count(self):
        old = datetime.now(timezone.utc) - timedelta(hours=2)
        interactions = [{"timestamp": old} for _ in range(200)]
        assert self._should_rate_limit(interactions) is False


# --- Interaction state patterns ---


class TestInteractionState:
    """Tests for interaction state patterns."""

    def _get_state(self, interaction):
        """Get current interaction state."""
        return {
            "has_viewed": interaction.get("viewed", False),
            "current_vote": interaction.get("voted"),
            "has_researched": interaction.get("researched", False),
            "has_shared": interaction.get("shared", False),
        }

    def test_empty_state(self):
        state = self._get_state({})
        assert state["has_viewed"] is False
        assert state["current_vote"] is None
        assert state["has_researched"] is False
        assert state["has_shared"] is False

    def test_viewed_state(self):
        state = self._get_state({"viewed": True})
        assert state["has_viewed"] is True

    def test_voted_state(self):
        state = self._get_state({"voted": "up"})
        assert state["current_vote"] == "up"

    def test_full_state(self):
        interaction = {
            "viewed": True,
            "voted": "down",
            "researched": True,
            "shared": True,
        }
        state = self._get_state(interaction)
        assert state["has_viewed"] is True
        assert state["current_vote"] == "down"
        assert state["has_researched"] is True
        assert state["has_shared"] is True
