"""Unit tests for core data models."""

import pytest
import json
from datetime import datetime

from src.models import (
    ColumnInfo,
    DataProfile,
    AnalysisObjective,
    RequirementSpec,
    AnalysisTask,
    AnalysisPlan,
    AnalysisResult,
)


class TestColumnInfo:
    """Tests for ColumnInfo model."""
    
    def test_create_column_info(self):
        """Test creating a ColumnInfo instance."""
        col = ColumnInfo(
            name='age',
            dtype='numeric',
            missing_rate=0.05,
            unique_count=50,
            sample_values=[25, 30, 35, 40, 45],
            statistics={'mean': 35.5, 'std': 10.2}
        )
        
        assert col.name == 'age'
        assert col.dtype == 'numeric'
        assert col.missing_rate == 0.05
        assert col.unique_count == 50
        assert len(col.sample_values) == 5
        assert col.statistics['mean'] == 35.5
    
    def test_column_info_serialization(self):
        """Test ColumnInfo to_dict and from_dict."""
        col = ColumnInfo(
            name='status',
            dtype='categorical',
            missing_rate=0.0,
            unique_count=3,
            sample_values=['open', 'closed', 'pending']
        )
        
        col_dict = col.to_dict()
        assert col_dict['name'] == 'status'
        assert col_dict['dtype'] == 'categorical'
        
        col_restored = ColumnInfo.from_dict(col_dict)
        assert col_restored.name == col.name
        assert col_restored.dtype == col.dtype
        assert col_restored.sample_values == col.sample_values
    
    def test_column_info_json(self):
        """Test ColumnInfo JSON serialization."""
        col = ColumnInfo(
            name='created_at',
            dtype='datetime',
            missing_rate=0.0,
            unique_count=1000
        )
        
        json_str = col.to_json()
        col_restored = ColumnInfo.from_json(json_str)
        
        assert col_restored.name == col.name
        assert col_restored.dtype == col.dtype


class TestDataProfile:
    """Tests for DataProfile model."""
    
    def test_create_data_profile(self):
        """Test creating a DataProfile instance."""
        columns = [
            ColumnInfo(name='id', dtype='numeric', missing_rate=0.0, unique_count=100),
            ColumnInfo(name='status', dtype='categorical', missing_rate=0.0, unique_count=3),
        ]
        
        profile = DataProfile(
            file_path='test.csv',
            row_count=100,
            column_count=2,
            columns=columns,
            inferred_type='ticket',
            key_fields={'status': 'ticket status'},
            quality_score=85.5,
            summary='Test data profile'
        )
        
        assert profile.file_path == 'test.csv'
        assert profile.row_count == 100
        assert profile.inferred_type == 'ticket'
        assert len(profile.columns) == 2
        assert profile.quality_score == 85.5
    
    def test_data_profile_serialization(self):
        """Test DataProfile to_dict and from_dict."""
        columns = [
            ColumnInfo(name='id', dtype='numeric', missing_rate=0.0, unique_count=100),
        ]
        
        profile = DataProfile(
            file_path='test.csv',
            row_count=100,
            column_count=1,
            columns=columns,
            inferred_type='sales'
        )
        
        profile_dict = profile.to_dict()
        assert profile_dict['file_path'] == 'test.csv'
        assert profile_dict['inferred_type'] == 'sales'
        assert len(profile_dict['columns']) == 1
        
        profile_restored = DataProfile.from_dict(profile_dict)
        assert profile_restored.file_path == profile.file_path
        assert profile_restored.row_count == profile.row_count
        assert len(profile_restored.columns) == len(profile.columns)


class TestAnalysisObjective:
    """Tests for AnalysisObjective model."""
    
    def test_create_objective(self):
        """Test creating an AnalysisObjective instance."""
        obj = AnalysisObjective(
            name='Health Analysis',
            description='Analyze ticket health',
            metrics=['close_rate', 'avg_duration'],
            priority=5
        )
        
        assert obj.name == 'Health Analysis'
        assert obj.priority == 5
        assert len(obj.metrics) == 2
    
    def test_objective_serialization(self):
        """Test AnalysisObjective serialization."""
        obj = AnalysisObjective(
            name='Test',
            description='Test objective',
            metrics=['metric1']
        )
        
        obj_dict = obj.to_dict()
        obj_restored = AnalysisObjective.from_dict(obj_dict)
        
        assert obj_restored.name == obj.name
        assert obj_restored.metrics == obj.metrics


class TestRequirementSpec:
    """Tests for RequirementSpec model."""
    
    def test_create_requirement_spec(self):
        """Test creating a RequirementSpec instance."""
        objectives = [
            AnalysisObjective(name='Obj1', description='First objective', metrics=['m1'])
        ]
        
        spec = RequirementSpec(
            user_input='Analyze ticket health',
            objectives=objectives,
            constraints=['no_pii'],
            expected_outputs=['report', 'charts']
        )
        
        assert spec.user_input == 'Analyze ticket health'
        assert len(spec.objectives) == 1
        assert len(spec.constraints) == 1
    
    def test_requirement_spec_serialization(self):
        """Test RequirementSpec serialization."""
        objectives = [
            AnalysisObjective(name='Obj1', description='Test', metrics=['m1'])
        ]
        
        spec = RequirementSpec(
            user_input='Test input',
            objectives=objectives
        )
        
        spec_dict = spec.to_dict()
        spec_restored = RequirementSpec.from_dict(spec_dict)
        
        assert spec_restored.user_input == spec.user_input
        assert len(spec_restored.objectives) == len(spec.objectives)


class TestAnalysisTask:
    """Tests for AnalysisTask model."""
    
    def test_create_task(self):
        """Test creating an AnalysisTask instance."""
        task = AnalysisTask(
            id='task_1',
            name='Calculate statistics',
            description='Calculate basic statistics',
            priority=5,
            dependencies=['task_0'],
            required_tools=['stats_tool'],
            expected_output='Statistics summary'
        )
        
        assert task.id == 'task_1'
        assert task.priority == 5
        assert len(task.dependencies) == 1
        assert task.status == 'pending'
    
    def test_task_serialization(self):
        """Test AnalysisTask serialization."""
        task = AnalysisTask(
            id='task_1',
            name='Test task',
            description='Test',
            priority=3
        )
        
        task_dict = task.to_dict()
        task_restored = AnalysisTask.from_dict(task_dict)
        
        assert task_restored.id == task.id
        assert task_restored.name == task.name


class TestAnalysisPlan:
    """Tests for AnalysisPlan model."""
    
    def test_create_plan(self):
        """Test creating an AnalysisPlan instance."""
        objectives = [
            AnalysisObjective(name='Obj1', description='Test', metrics=['m1'])
        ]
        tasks = [
            AnalysisTask(id='t1', name='Task 1', description='Test', priority=5)
        ]
        
        plan = AnalysisPlan(
            objectives=objectives,
            tasks=tasks,
            tool_config={'tool1': 'config1'},
            estimated_duration=300
        )
        
        assert len(plan.objectives) == 1
        assert len(plan.tasks) == 1
        assert plan.estimated_duration == 300
        assert isinstance(plan.created_at, datetime)
    
    def test_plan_serialization(self):
        """Test AnalysisPlan serialization."""
        objectives = [
            AnalysisObjective(name='Obj1', description='Test', metrics=['m1'])
        ]
        tasks = [
            AnalysisTask(id='t1', name='Task 1', description='Test', priority=5)
        ]
        
        plan = AnalysisPlan(objectives=objectives, tasks=tasks)
        
        plan_dict = plan.to_dict()
        plan_restored = AnalysisPlan.from_dict(plan_dict)
        
        assert len(plan_restored.objectives) == len(plan.objectives)
        assert len(plan_restored.tasks) == len(plan.tasks)


class TestAnalysisResult:
    """Tests for AnalysisResult model."""
    
    def test_create_result(self):
        """Test creating an AnalysisResult instance."""
        result = AnalysisResult(
            task_id='task_1',
            task_name='Test task',
            success=True,
            data={'count': 100},
            visualizations=['chart1.png'],
            insights=['Key finding 1'],
            execution_time=5.5
        )
        
        assert result.task_id == 'task_1'
        assert result.success is True
        assert result.data['count'] == 100
        assert len(result.insights) == 1
        assert result.error is None
    
    def test_result_with_error(self):
        """Test AnalysisResult with error."""
        result = AnalysisResult(
            task_id='task_1',
            task_name='Failed task',
            success=False,
            error='Tool execution failed'
        )
        
        assert result.success is False
        assert result.error == 'Tool execution failed'
    
    def test_result_serialization(self):
        """Test AnalysisResult serialization."""
        result = AnalysisResult(
            task_id='task_1',
            task_name='Test',
            success=True,
            data={'key': 'value'}
        )
        
        result_dict = result.to_dict()
        result_restored = AnalysisResult.from_dict(result_dict)
        
        assert result_restored.task_id == result.task_id
        assert result_restored.success == result.success
        assert result_restored.data == result.data