package db

import (
	"testing"
	"time"
)

func TestInitDB_SQLite(t *testing.T) {
	client, driver, err := InitDB("sqlite://:memory:")
	if err != nil {
		t.Fatalf("InitDB() error = %v", err)
	}
	if driver != "sqlite" {
		t.Errorf("InitDB() driver = %q, want sqlite", driver)
	}
	if client == nil {
		t.Fatal("InitDB() client = nil")
	}

	// Verify tables exist by running AutoMigrate (idempotent)
	err = client.DB.AutoMigrate(&Message{}, &ModerationLog{}, &Media{}, &ScheduleOverride{})
	if err != nil {
		t.Errorf("AutoMigrate error = %v", err)
	}

	// Verify CRUD on Message
	msg := Message{
		Room:      "test",
		Username:  "user1",
		Text:      "hello",
		Timestamp: time.Now(),
		Type:      "public",
	}
	if err := client.DB.Create(&msg).Error; err != nil {
		t.Fatalf("Create message error = %v", err)
	}
	if msg.ID == 0 {
		t.Error("Create message did not set ID")
	}

	var count int64
	client.DB.Model(&Message{}).Count(&count)
	if count != 1 {
		t.Errorf("Message count = %d, want 1", count)
	}

	// Verify read
	var read Message
	if err := client.DB.First(&read, msg.ID).Error; err != nil {
		t.Fatalf("First message error = %v", err)
	}
	if read.Text != "hello" {
		t.Errorf("read.Text = %q, want hello", read.Text)
	}

	// Verify delete
	client.DB.Delete(&Message{}, msg.ID)
	client.DB.Model(&Message{}).Count(&count)
	if count != 0 {
		t.Errorf("Message count after delete = %d, want 0", count)
	}
}

func TestInitDB_ModerationLog(t *testing.T) {
	client, _, err := InitDB("sqlite://:memory:")
	if err != nil {
		t.Fatalf("InitDB() error = %v", err)
	}

	log := ModerationLog{
		Action:    "mute",
		Target:    "user1",
		Moderator: "admin",
		Reason:    "spam",
		Timestamp: time.Now(),
	}
	if err := client.DB.Create(&log).Error; err != nil {
		t.Fatalf("Create moderation log error = %v", err)
	}
	if log.ID == 0 {
		t.Error("Create moderation log did not set ID")
	}

	var count int64
	client.DB.Model(&ModerationLog{}).Count(&count)
	if count != 1 {
		t.Errorf("ModerationLog count = %d, want 1", count)
	}
}

func TestInitDB_Media(t *testing.T) {
	client, _, err := InitDB("sqlite://:memory:")
	if err != nil {
		t.Fatalf("InitDB() error = %v", err)
	}

	media := Media{
		Filename:        "test.mp4",
		OriginalName:    "test.mp4",
		Path:            "/media/test.mp4",
		SizeBytes:       1024,
		DurationSeconds: 60,
		Status:          "ready",
		Title:           "Test Video",
		Tags:            "tag1,tag2",
	}
	if err := client.DB.Create(&media).Error; err != nil {
		t.Fatalf("Create media error = %v", err)
	}
	if media.ID == 0 {
		t.Error("Create media did not set ID")
	}

	// Verify update
	client.DB.Model(&media).Update("status", "needs_normalization")
	var updated Media
	client.DB.First(&updated, media.ID)
	if updated.Status != "needs_normalization" {
		t.Errorf("updated.Status = %q, want needs_normalization", updated.Status)
	}
}

func TestInitDB_ScheduleOverride(t *testing.T) {
	client, _, err := InitDB("sqlite://:memory:")
	if err != nil {
		t.Fatalf("InitDB() error = %v", err)
	}

	now := time.Now()
	ov := ScheduleOverride{
		MediaID:   1,
		StartTime: now,
		EndTime:   now.Add(1 * time.Hour),
		Reason:    "special event",
	}
	if err := client.DB.Create(&ov).Error; err != nil {
		t.Fatalf("Create schedule override error = %v", err)
	}
	if ov.ID == 0 {
		t.Error("Create schedule override did not set ID")
	}

	// Conflict detection
	var conflict int64
	client.DB.Model(&ScheduleOverride{}).
		Where("start_time < ? AND end_time > ?", ov.EndTime, ov.StartTime).
		Count(&conflict)
	if conflict != 1 {
		t.Errorf("conflict count = %d, want 1", conflict)
	}
}

func TestInitDB_EmptyURL(t *testing.T) {
	// Empty URL should default to SQLite chat.db
	// This creates a file, clean up after
	client, driver, err := InitDB("")
	if err != nil {
		t.Fatalf("InitDB(\"\") error = %v", err)
	}
	if driver != "sqlite" {
		t.Errorf("InitDB(\"\") driver = %q, want sqlite", driver)
	}
	if client == nil {
		t.Fatal("InitDB(\"\") client = nil")
	}
}

func TestInitDB_SQLitePath(t *testing.T) {
	client, driver, err := InitDB("sqlite://:memory:?cache=shared")
	if err != nil {
		t.Fatalf("InitDB() error = %v", err)
	}
	if driver != "sqlite" {
		t.Errorf("InitDB() driver = %q, want sqlite", driver)
	}
	if client == nil {
		t.Fatal("InitDB() client = nil")
	}
}