package storage

import (
	"encoding/json"
	"strings"
	"time"

	"gardomatic.kleiax.de/internal/platform/validate"
)

// LocationModelInterface persists hierarchical locations within a garden.
type LocationModelInterface interface {
	Insert(location Location) (Location, error)
	Get(gardenID, id int) (Location, error)
	GetAllForGarden(gardenID int) ([]Location, error)
	Update(gardenID int, location Location) (Location, error)
	Delete(gardenID, id int) error
}

// ValidateLocation applies persistence-independent location validation rules.
func ValidateLocation(v *validate.Validator, location Location) {
	v.Check(strings.TrimSpace(location.Name) != "", "name", "must be provided")
	v.Check(len(location.Name) <= 500, "name", "must not be more than 500 bytes long")
	v.Check(len(location.Description) <= 10_000, "description", "must not be more than 10000 bytes long")
	v.Check(len(location.Kind) <= 100, "kind", "must not be more than 100 bytes long")
	v.Check(len(location.Attributes) == 0 || json.Valid(location.Attributes), "attributes", "must be valid JSON")
	if location.ParentID != nil {
		v.Check(*location.ParentID > 0, "parent_id", "must be a positive integer")
		v.Check(*location.ParentID != location.ID, "parent_id", "must not refer to the location itself")
	}
	if location.AreaSQM != nil {
		v.Check(*location.AreaSQM >= 0, "area_sqm", "must be zero or greater")
	}
	validateOptionalEnum(v, "sun_exposure", location.SunExposure, "sunny", "partial_shade", "shade")
	validateOptionalEnum(v, "soil_condition", location.SoilCondition, "dry", "moist", "boggy")
	validateOptionalEnum(v, "soil_reaction", location.SoilReaction, "alkaline", "acidic", "neutral")
}

// Location describes a physical place where plants can be assigned.
type Location struct {
	ID            int             `json:"id"`
	GardenID      int             `json:"garden_id"`
	ParentID      *int            `json:"parent_id,omitempty"`
	Name          string          `json:"name"`
	Description   string          `json:"description"`
	ImageData     string          `json:"image_data,omitempty"`
	ImageID       *int            `json:"image_id,omitempty"`
	Kind          string          `json:"kind"`
	AreaSQM       *float64        `json:"area_sqm,omitempty"`
	SunExposure   *string         `json:"sun_exposure,omitempty"`
	SoilCondition *string         `json:"soil_condition,omitempty"`
	SoilReaction  *string         `json:"soil_reaction,omitempty"`
	Attributes    json.RawMessage `json:"attributes"`
	CreatedAt     time.Time       `json:"created_at"`
	UpdatedAt     time.Time       `json:"updated_at"`
	Version       int             `json:"version"`
	CreatedBy     int             `json:"created_by"`
	UpdatedBy     int             `json:"updated_by"`
}