package common

import (
	"encoding/json"
	"fmt"
	"hash/fnv"
	"slices"
	"strings"
	"time"

	"github.com/charmbracelet/lipgloss"
	"github.com/google/uuid"
)

func (todo *Todo) Store(store *BoltStore, user string) error {
	isOwner := todo.Owner == user
	isShared := slices.Contains(todo.SharedWith, user)

	if !isOwner && !isShared {
		return fmt.Errorf("unauthorized user")
	}
	if todo.Id == "" {
		todo.Id = uuid.New().String()
	}
	todo.LastModified = time.Now().UTC()
	todoJson, err := json.Marshal(todo)
	if err != nil {
		return err
	}
	return store.SaveValueToBucket(todo.Owner, todo.Id, string(todoJson))
}

func (todoRequest StoreTodoRequest) Store(store *BoltStore, user string) error {
	todo := Todo{
		Id:           uuid.New().String(),
		Name:         todoRequest.Name,
		Description:  todoRequest.Description,
		Status:       todoRequest.Status,
		Owner:        user,
		SharedWith:   todoRequest.SharedWith,
		LastModified: time.Now().UTC(),
	}
	todoJson, err := json.Marshal(todo)
	if err != nil {
		return err
	}
	return store.SaveValueToBucket(user, todo.Id, string(todoJson))
}

func (todoList TodoList) FindByName(name string) (Todo, bool) {
	for _, todo := range todoList.Todos {
		if todo.Name == name {
			return todo, true
		}
	}
	return Todo{}, false
}

func (todo Todo) PrintIndexed(index int) {

	if todo.Deleted {
		return
	}
	var statusColor string

	// Select color based on the status (case-insensitive)
	switch strings.ToLower(todo.Status) {
	case Done:
		statusColor = ColorGreen
	case WIP:
		statusColor = ColorYellow
	case Pending, NotStarted:
		statusColor = ColorBlue
	case Blocked, Failed:
		statusColor = ColorRed
	default:
		statusColor = ColorWhite // No color for unknown statuses
	}

	var renderedLabels []string

	for _, l := range todo.Labels {
		h := fnv.New32a()
		h.Write([]byte(l))
		colorID := fmt.Sprint(1 + (h.Sum32() % 6))

		style := lipgloss.NewStyle().
			Bold(true).
			Foreground(lipgloss.Color("0")).
			Background(lipgloss.Color(colorID)).
			Padding(0, 1).
			MarginRight(1).
			Border(lipgloss.RoundedBorder()).
			BorderForeground(lipgloss.Color(colorID)).
			BorderBackground(lipgloss.Color(""))

		renderedLabels = append(renderedLabels, style.Render(l))
	}

	fmt.Println(lipgloss.JoinHorizontal(lipgloss.Top, renderedLabels...))

	fmt.Printf("%s%d)%s %s%-20s%s", ColorCyan, index, ColorReset, ColorWhite, todo.Name, ColorReset)

	fmt.Printf("  %s %s%s\n", statusColor, strings.ToUpper(todo.Status), ColorReset)

	// 5. Description (Indented and slightly dimmer if possible, or standard)
	fmt.Printf("   %s\n", todo.Description)
	uuidStyle := lipgloss.NewStyle().Foreground(lipgloss.Color("240"))
	lastMod := todo.LastModified.Format("2006-01-02 15:04")
	metaLine := fmt.Sprintf("   Last Modified: %s • ID: %s", lastMod, todo.Id)
	if len(todo.SharedWith) > 0 {
		metaLine = fmt.Sprintf("%s • Shared with: %s", metaLine, strings.Join(todo.SharedWith, ", "))
	}
	fmt.Println(uuidStyle.Render(metaLine))

	fmt.Printf("   %s----------------------------%s\n", ColorGray, ColorReset)
}

func (t Todo) IsEqual(other Todo) bool {
	return t.Id == other.Id &&
		t.Name == other.Name &&
		t.Description == other.Description &&
		t.Status == other.Status &&
		t.Owner == other.Owner &&
		slices.Equal(t.SharedWith, other.SharedWith) &&
		t.Deleted == other.Deleted
}

func (t Todo) IsEqualIgnoringStatus(other Todo) bool {
	return t.Id == other.Id &&
		t.Name == other.Name &&
		t.Description == other.Description &&
		t.Owner == other.Owner &&
		slices.Equal(t.SharedWith, other.SharedWith) &&
		t.Deleted == other.Deleted
}