package projects

import (
	"errors"
	"strings"

	"senlinai-agent/backend/internal/models"
)

type Service struct {
}

type Dashboard struct {
	ProjectID          uint  `json:"project_id"`
	PendingInboxCount  int64 `json:"pending_inbox_count"`
	OpenTaskCount      int64 `json:"open_task_count"`
	RecentNoteCount    int64 `json:"recent_note_count"`
	RecentSessionCount int64 `json:"recent_session_count"`
}

func NewService() *Service {
	return &Service{}
}

func (s *Service) CreateProject(ownerID uint, name string, description string) (*models.SenlinAgentProject, error) {
	name = strings.TrimSpace(name)
	if name == "" {
		return nil, errors.New("project name is required")
	}
	project := &models.SenlinAgentProject{OwnerID: ownerID, Name: name, Description: description}
	return project, models.DBService.Create(project).Error
}

func (s *Service) ListProjects(ownerID uint) ([]models.SenlinAgentProject, error) {
	var projects []models.SenlinAgentProject
	err := models.DBService.Where("owner_id = ?", ownerID).Order("updated_at desc").Find(&projects).Error
	return projects, err
}

func (s *Service) CreateTag(projectID uint, name string) (*models.SenlinAgentTag, error) {
	name = strings.TrimSpace(name)
	if name == "" {
		return nil, errors.New("tag name is required")
	}
	tag := &models.SenlinAgentTag{ProjectID: projectID, Name: name}
	return tag, models.DBService.Create(tag).Error
}

func (s *Service) ListTags(projectID uint) ([]models.SenlinAgentTag, error) {
	var tags []models.SenlinAgentTag
	err := models.DBService.Where("project_id = ?", projectID).Order("name asc").Find(&tags).Error
	return tags, err
}

func (s *Service) Dashboard(ownerID uint, projectID uint) (Dashboard, error) {
	var project models.SenlinAgentProject
	if err := models.DBService.Where("id = ? AND owner_id = ?", projectID, ownerID).First(&project).Error; err != nil {
		return Dashboard{}, err
	}
	dashboard := Dashboard{ProjectID: projectID}
	if err := models.DBService.Model(&models.SenlinAgentInboxItem{}).Where("project_id = ? AND status = ?", projectID, "open").Count(&dashboard.PendingInboxCount).Error; err != nil {
		return dashboard, err
	}
	if err := models.DBService.Model(&models.SenlinAgentTask{}).Where("project_id = ? AND status <> ?", projectID, "done").Count(&dashboard.OpenTaskCount).Error; err != nil {
		return dashboard, err
	}
	if err := models.DBService.Model(&models.SenlinAgentNote{}).Where("project_id = ?", projectID).Count(&dashboard.RecentNoteCount).Error; err != nil {
		return dashboard, err
	}
	if err := models.DBService.Model(&models.SenlinAgentAISession{}).Where("project_id = ?", projectID).Count(&dashboard.RecentSessionCount).Error; err != nil {
		return dashboard, err
	}
	return dashboard, nil
}