package model

import (
	"database/sql"
	"strings"
	"time"
)

type Task struct {
	ID              int64          `db:"id" json:"id"`
	UserID          int64          `db:"user_id" json:"user_id"`
	Title           string         `db:"title" json:"title"`
	Description     string         `db:"description" json:"description"`
	Icon            string         `db:"icon" json:"icon"`
	Color           string         `db:"color" json:"color"`
	DueDate         sql.NullTime   `db:"due_date" json:"-"`
	DueDateStr      *string        `db:"-" json:"due_date"`
	Priority        int            `db:"priority" json:"priority"`
	ReminderTime    sql.NullString `db:"reminder_time" json:"-"`
	ReminderTimeStr *string        `db:"-" json:"reminder_time"`
	CompletedAt     sql.NullTime   `db:"completed_at" json:"-"`
	Completed       bool           `db:"-" json:"completed"`
	CreatedAt       time.Time      `db:"created_at" json:"created_at"`
	UpdatedAt       time.Time      `db:"updated_at" json:"updated_at"`
}

func (t *Task) ProcessForJSON() {
	if t.DueDate.Valid {
		s := t.DueDate.Time.Format("2006-01-02")
		t.DueDateStr = &s
	}
	if t.ReminderTime.Valid && t.ReminderTime.String != "" {
		timeStr := t.ReminderTime.String
		// Handle formats like "0000-01-01T19:00:00Z" or "19:00:00"
		if strings.Contains(timeStr, "T") {
			parsed, err := time.Parse(time.RFC3339, timeStr)
			if err == nil {
				formatted := parsed.Format("15:04")
				t.ReminderTimeStr = &formatted
				return
			}
		}
		// Handle "19:00:00" format
		if len(timeStr) >= 5 {
			formatted := timeStr[:5]
			t.ReminderTimeStr = &formatted
		}
	}
	t.Completed = t.CompletedAt.Valid
}

type CreateTaskRequest struct {
	Title        string  `json:"title"`
	Description  string  `json:"description,omitempty"`
	Icon         string  `json:"icon,omitempty"`
	Color        string  `json:"color,omitempty"`
	DueDate      *string `json:"due_date,omitempty"`
	Priority     int     `json:"priority,omitempty"`
	ReminderTime *string `json:"reminder_time,omitempty"`
}

type UpdateTaskRequest struct {
	Title        *string `json:"title,omitempty"`
	Description  *string `json:"description,omitempty"`
	Icon         *string `json:"icon,omitempty"`
	Color        *string `json:"color,omitempty"`
	DueDate      *string `json:"due_date,omitempty"`
	Priority     *int    `json:"priority,omitempty"`
	ReminderTime *string `json:"reminder_time,omitempty"`
}