package utils

import (
	"errors"
	"path"

	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"
)

type Project struct {
	ID           uint `gorm:"primaryKey"`
	Name         string
	Environments []Environment
}

type Environment struct {
	ID        uint `gorm:"primaryKey"`
	Name      string
	Data      string
	ProjectID uint
	Project   Project `gorm:"constraint:OnUpdate:CASCADE,OnDelete:SET NULL;"`
}

var DB *gorm.DB

func InitDb() {
	var openErr error
	DB, openErr = gorm.Open(sqlite.Open(path.Join(EnvyPath, "envy.db")), &gorm.Config{
		Logger: logger.Default.LogMode(logger.Silent),
	})
	if openErr != nil {
		ErrPrint("Error while opening database:", openErr.Error())
	}
}

func MigrateDb() {
	err := DB.AutoMigrate(&Project{}, &Environment{})
	if err != nil {
		panic(err)
	}
}

func GetProjects(name string) ([]Project, error) {
	InitDb()

	var dbProjects []Project
	result := DB.Where("name = ?", name).Find(&dbProjects)

	if result.Error != nil {
		return nil, errors.New("Some error occured: " + result.Error.Error())
	}
	return dbProjects, nil
}

func GetProject(name string) (Project, error) {
	InitDb()

	var dbProject Project
	result := DB.Where("name = ?", name).First(&dbProject)

	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrRecordNotFound) {
			return Project{}, errors.New("Project with the name " + name + " not found in the database")
		} else {
			return Project{}, errors.New("Some error occured: " + result.Error.Error())
		}
	}
	return dbProject, nil
}

func GetEnvironments(project uint) ([]Environment, error) {
	InitDb()

	var dbEnvs []Environment
	result := DB.Where("project_id = ?", project).Find(&dbEnvs)

	if result.Error != nil {
		return nil, errors.New("Some error occured: " + result.Error.Error())
	}
	return dbEnvs, nil
}

func GetEnvironment(project uint, environment string) (Environment, error) {
	InitDb()

	var dbEnv Environment
	result := DB.Where("project_id = ? AND name = ?", project, environment).First(&dbEnv)

	if result.Error != nil {
		if errors.Is(result.Error, gorm.ErrRecordNotFound) {
			return Environment{}, errors.New("Environment with the name " + environment + " not found in the database")
		} else {
			return Environment{}, errors.New("Some error occured: " + result.Error.Error())
		}
	}
	return dbEnv, nil
}