package models

import (
	"time"

	"gorm.io/gorm"
)

// ChecklistItemKinds lists the allowed ChecklistItem.Kind values.
var ChecklistItemKinds = []string{"lektura", "artykul", "ksiazka", "prezentacja", "zadanie", "inne"}

// ChecklistItem is one entry of a Checklist. It may point at a reading, a
// deadline, a material or a course, and name a deck of golem15.presentations
// by slug. An item with a reading is done when the checklist's owner has
// read it (ReadingProgress); any other item is done when DoneAt is set.
type ChecklistItem struct {
	ID               uint       `gorm:"column:id;primaryKey"`
	ChecklistID      uint       `gorm:"column:checklist_id"`
	Kind             string     `gorm:"column:kind"`
	Title            string     `gorm:"column:title"`
	Notes            *string    `gorm:"column:notes"`
	URL              *string    `gorm:"column:url"`
	CourseID         *uint      `gorm:"column:course_id"`
	ReadingID        *uint      `gorm:"column:reading_id"`
	DeadlineID       *uint      `gorm:"column:deadline_id"`
	MaterialID       *uint      `gorm:"column:material_id"`
	PresentationSlug *string    `gorm:"column:presentation_slug"`
	DueAt            *time.Time `gorm:"column:due_at"`
	EstimateMinutes  *int       `gorm:"column:estimate_minutes"`
	SortOrder        int        `gorm:"column:sort_order"`
	DoneAt           *time.Time `gorm:"column:done_at"`
	CreatedAt        time.Time  `gorm:"column:created_at"`
	UpdatedAt        time.Time  `gorm:"column:updated_at"`
}

// TableName is the plugin table.
func (ChecklistItem) TableName() string { return "jz_bm_checklist_items" }

// Fillable lists the columns the student API may set. checklist_id moves an
// item to another of the caller's checklists; done_at is set by the done
// routes only.
func (ChecklistItem) Fillable() []string {
	return []string{"checklist_id", "kind", "title", "notes", "url", "course_id", "reading_id", "deadline_id",
		"material_id", "presentation_slug", "due_at", "estimate_minutes", "sort_order"}
}

// Rules are checked by the student API on every save.
func (ChecklistItem) Rules() map[string]string {
	return map[string]string{
		"kind":              "required|in:lektura,artykul,ksiazka,prezentacja,zadanie,inne",
		"title":             "required|max:500",
		"notes":             "nullable|max:10000",
		"url":               "nullable|max:2048",
		"presentation_slug": "nullable|max:255",
		"estimate_minutes":  "nullable|integer|min:0|max:10000",
		"sort_order":        "nullable|integer",
	}
}

// BeforeSave stores NULL for empty optional text.
func (i *ChecklistItem) BeforeSave(*gorm.DB) error {
	blank(&i.Notes, &i.URL, &i.PresentationSlug)
	return nil
}