package models

import (
	"context"
	"time"
)

type Log struct {
	ID                  string    `json:"id" db:"log_id"`
	UserID              string    `json:"-" db:"user_id"`
	TaskID              string    `json:"taskId" db:"task_id"`
	ItemID              string    `json:"itemId" db:"item_id"`
	ItemAmount          int       `json:"itemAmount" db:"item_amount"`
	SecondaryItemID     *string   `json:"secondaryItemId" db:"secondary_item_id"`
	SecondaryItemAmount int       `json:"secondaryItemAmount" db:"secondary_item_amount"`
	LoggedTime          time.Time `json:"loggedTime" db:"logged_time"`
	Description         string    `json:"description" db:"description"`
}

func (log *Log) Amount(itemID string) int {
	result := 0

	if log.ItemID == itemID {
		result += log.ItemAmount
	}
	if log.SecondaryItemID != nil && *log.SecondaryItemID == itemID {
		result += log.SecondaryItemAmount
	}

	return result
}

func (log *Log) Update(update LogUpdate) {
	if update.LoggedTime != nil {
		log.LoggedTime = update.LoggedTime.UTC()
	}
	if update.Description != nil {
		log.Description = *update.Description
	}
	if update.ItemAmount != nil {
		log.ItemAmount = *update.ItemAmount
	}
	if update.SecondaryItemID != nil {
		log.SecondaryItemID = update.SecondaryItemID
	}
	if update.ClearSecondaryItem {
		log.SecondaryItemID = nil
	}
	if update.SecondaryItemAmount != nil {
		log.SecondaryItemAmount = *update.SecondaryItemAmount
	}
}

type LogUpdate struct {
	LoggedTime          *time.Time `json:"loggedTime"`
	Description         *string    `json:"description"`
	ItemAmount          *int       `json:"itemAmount"`
	SecondaryItemID     *string    `json:"secondaryItemId"`
	SecondaryItemAmount *int       `json:"secondaryItemAmount"`
	ClearSecondaryItem  bool       `json:"clearSecondaryItem"`
}

type LogResult struct {
	Log
	Task          *Task `json:"task"`
	Item          *Item `json:"item"`
	SecondaryItem *Item `json:"secondaryItem"`
}

type LogFilter struct {
	UserID  string
	TaskIDs []string
	ItemIDs []string
	MinTime *time.Time
	MaxTime *time.Time
}

type LogRepository interface {
	Find(ctx context.Context, id string) (*Log, error)
	List(ctx context.Context, filter LogFilter) ([]*Log, error)
	Insert(ctx context.Context, log Log) error
	Update(ctx context.Context, log Log) error
	Delete(ctx context.Context, log Log) error
}