// internal/store/estimate_inference_test.go
package store

import (
	"testing"
	"time"

	"task-dashboard/internal/models"
)

func TestAverageEstimateForProject_AveragesUserEnteredEstimates(t *testing.T) {
	s := newNativeTasksTestStore(t)
	project, err := s.CreateProject("Sailing prep", "#3B82F6")
	if err != nil {
		t.Fatal(err)
	}
	due := time.Now()
	for _, minutes := range []int{30, 60} {
		task := models.Task{ID: newTaskID(), Content: "task", ProjectID: project.ID, EstimatedMinutes: minutes, DueDate: &due}
		if err := s.CreateNativeTask(task); err != nil {
			t.Fatal(err)
		}
	}
	// An unestimated task under the same project must not skew the average.
	if err := s.CreateNativeTask(models.Task{ID: "t-unestimated", Content: "no estimate", ProjectID: project.ID}); err != nil {
		t.Fatal(err)
	}

	avg, ok, err := s.AverageEstimateForProject(project.ID)
	if err != nil {
		t.Fatalf("AverageEstimateForProject: %v", err)
	}
	if !ok {
		t.Fatal("expected ok = true")
	}
	if avg != 45 {
		t.Errorf("avg = %d, want 45", avg)
	}
}

func TestAverageEstimateForProject_NoEstimatedTasks_ReturnsNotOK(t *testing.T) {
	s := newNativeTasksTestStore(t)
	project, err := s.CreateProject("Empty", "#111111")
	if err != nil {
		t.Fatal(err)
	}

	_, ok, err := s.AverageEstimateForProject(project.ID)
	if err != nil {
		t.Fatal(err)
	}
	if ok {
		t.Error("expected ok = false when no tasks have an estimate")
	}
}

func TestAverageEstimateForLabel_AveragesUserEnteredEstimates(t *testing.T) {
	s := newNativeTasksTestStore(t)
	for _, minutes := range []int{20, 40} {
		task := models.Task{ID: newTaskID(), Content: "task", Labels: []string{"errands"}, EstimatedMinutes: minutes}
		if err := s.CreateNativeTask(task); err != nil {
			t.Fatal(err)
		}
	}
	if err := s.CreateNativeTask(models.Task{ID: "t-other-label", Content: "other", Labels: []string{"unrelated"}, EstimatedMinutes: 100}); err != nil {
		t.Fatal(err)
	}

	avg, ok, err := s.AverageEstimateForLabel("errands")
	if err != nil {
		t.Fatalf("AverageEstimateForLabel: %v", err)
	}
	if !ok {
		t.Fatal("expected ok = true")
	}
	if avg != 30 {
		t.Errorf("avg = %d, want 30", avg)
	}
}

func TestAverageEstimateForLabel_NoMatches_ReturnsNotOK(t *testing.T) {
	s := newNativeTasksTestStore(t)
	_, ok, err := s.AverageEstimateForLabel("nonexistent")
	if err != nil {
		t.Fatal(err)
	}
	if ok {
		t.Error("expected ok = false")
	}
}