package models

import (
	"context"
	"sort"
	"time"
)

type Project struct {
	ID             string     `json:"id" db:"project_id"`
	UserID         string     `json:"-" db:"user_id"`
	GroupID        *string    `json:"groupId" db:"project_group_id"`
	Name           string     `json:"name" db:"name"`
	Description    string     `json:"description" db:"description"`
	Icon           string     `json:"icon" db:"icon"`
	Active         bool       `json:"active" db:"active"`
	CreatedTime    time.Time  `json:"createdTime" db:"created_time"`
	StartTime      *time.Time `json:"startTime" db:"start_time"`
	EndTime        *time.Time `json:"endTime" db:"end_time"`
	SubtractAmount int        `json:"subtractAmount" db:"subtract_amount"`
	StatusTag      *string    `json:"statusTag" db:"status_tag"`
	Favorite       bool       `json:"favorite" db:"favorite"`
	Tags           []string   `json:"tags" db:"tags"`
	TaskSortFields []string     `json:"taskSortFields" db:"task_sort_fields"`
}

func (project *Project) Update(update ProjectUpdate) {
	if update.GroupID != nil {
		if *update.GroupID == "" {
			project.GroupID = nil
		} else {
			project.GroupID = update.GroupID
		}
	}
	if update.Name != nil {
		project.Name = *update.Name
	}
	if update.Description != nil {
		project.Description = *update.Description
	}
	if update.Icon != nil {
		project.Icon = *update.Icon
	}
	if update.Active != nil {
		project.Active = *update.Active
	}
	if update.StartTime != nil {
		startTimeCopy := update.StartTime.UTC()
		project.StartTime = &startTimeCopy
	}
	if update.ClearStartTime {
		project.StartTime = nil
	}
	if update.EndTime != nil {
		endTimeCopy := update.EndTime.UTC()
		project.EndTime = &endTimeCopy
	}
	if update.ClearEndTime {
		project.EndTime = nil
	}
	if update.SubtractAmount != nil {
		project.SubtractAmount = *update.SubtractAmount
		if project.SubtractAmount < 0 {
			project.SubtractAmount = 0
		}
	}
	if update.StatusTag != nil {
		project.StatusTag = update.StatusTag
	}
	if update.ClearStatusTag {
		project.StatusTag = nil
	}
	if update.Favorite != nil {
		project.Favorite = *update.Favorite
	}
	if update.SetTags != nil {
		project.Tags = update.SetTags
	}
	if update.TaskSortFields != nil {
		project.TaskSortFields = append(update.TaskSortFields[:0:0], update.TaskSortFields...)
	}

	if project.StatusTag != nil && project.Active {
		project.StatusTag = nil
	}
}

type ProjectUpdate struct {
	GroupID        *string    `json:"groupId"`
	Name           *string    `json:"name"`
	Description    *string    `json:"description"`
	Icon           *string    `json:"icon"`
	Active         *bool      `json:"active"`
	StartTime      *time.Time `json:"startTime"`
	ClearStartTime bool       `json:"clearStartTime"`
	EndTime        *time.Time `json:"endTime"`
	ClearEndTime   bool       `json:"clearEndTime"`
	SubtractAmount *int       `json:"subtractAmount"`
	StatusTag      *string    `json:"statusTag"`
	ClearStatusTag bool       `json:"clearStatusTag"`
	SetTags        []string   `json:"setTags"`
	Favorite       *bool      `json:"favorite"`
	TaskSortFields []string   `json:"taskSortFields"`
}

type ProjectResult struct {
	Project
	Tasks        []*TaskResult        `json:"tasks"`
	Subtractions []ProjectSubtraction `json:"subtractions"`
}

func (result *ProjectResult) SortTasks() {
	sorter := TaskSorter{
		Data:   result.Tasks,
		Fields: result.Project.TaskSortFields,
	}
	if len(sorter.Fields) == 0 {
		sorter.Fields = []string{"status"}
	}

	sort.Sort(sorter)
}

type ProjectSubtraction struct {
	Item   Item `json:"item"`
	Amount int  `json:"amount"`
}

type ProjectFilter struct {
	UserID            string
	ProjectGroupIDs   []string
	Active            *bool
	Favorite          *bool
	Expiring          bool
	IncludeSemiActive bool
	IDs               []string
	Ungrouped         bool
}

type ProjectRepository interface {
	Find(ctx context.Context, id string) (*Project, error)
	List(ctx context.Context, filter ProjectFilter) ([]*Project, error)
	Insert(ctx context.Context, project Project) error
	Update(ctx context.Context, project Project) error
	Delete(ctx context.Context, project Project) error
}