package setup

import (
	"bubble/setup/fields"
	"bubble/setup/ui"
	"bubble/types"
	"fmt"
	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/glamour"
	"github.com/sirupsen/logrus"
	"strings"
)

type FormModel struct {
	CurrentSection  *types.Section
	FieldModels     []fields.FieldModel
	focus           int
	renderedContent string
}

func NewFormModel(application *types.PackageApplication, sectionIdx, focus int) *FormModel {
	currentSection := &application.Sections[sectionIdx]
	var fieldModels []fields.FieldModel
	for _, sectionField := range currentSection.Fields {
		if !CheckCondition(sectionField.Condition, application) {
			continue
		}
		switch sectionField.FieldType {
		case "select":
			var options []string
			for j := range sectionField.Options {
				options = append(options, fmt.Sprintf("%v", sectionField.Options[j]))
			}
			if sectionField.SpecialValue != "" {
				specialOptions := SpecialValueHandle(sectionField.SpecialValue)
				if strSpecial, ok := specialOptions.([]string); ok {
					options = strSpecial
				}
			}
			selected := fmt.Sprintf("%v", sectionField.Variable.Value)
			fieldModels = append(fieldModels, fields.NewSelectModel(sectionField.Name, selected, options))
		case "check":
			checked := false
			if value, ok := sectionField.Variable.Value.(bool); ok {
				checked = value
			} else {
				checked = sectionField.Variable.Value == "true"
			}
			fieldModels = append(fieldModels, fields.NewCheckboxModel(sectionField.Name, checked))
		case "compute":
			value, err := ComputeValue(sectionField.Compute, application)
			if err != nil {
				value = fmt.Sprintf("Ошибка вычисления: %v", err)
			}
			fieldModels = append(fieldModels, fields.NewComputeModel(sectionField.Name, fmt.Sprintf("%v", value)))
		//compute расчет
		case "file":
			fieldModels = append(fieldModels, fields.NewFileSelectModel(sectionField.Name, fmt.Sprintf("%v", sectionField.Variable.Value), sectionField.FileFieldExtensions))
		case "directory":
			fieldModels = append(fieldModels, fields.NewDirSelectModel(sectionField.Name, fmt.Sprintf("%v", sectionField.Variable.Value)))
		default:
			fieldModels = append(fieldModels, fields.NewInputModel(sectionField.Name, fmt.Sprintf("%v", sectionField.Variable.Value)))
		}
	}
	if len(fieldModels) > focus {
		fieldModels[focus].Focus()
	}
	m := &FormModel{
		FieldModels:    fieldModels,
		focus:          focus,
		CurrentSection: currentSection,
	}
	if currentSection.Type == "abouta" { //"about" {
		md := strings.Join(currentSection.Paragraphs, "\n\n")
		renderer, _ := glamour.NewTermRenderer(
			glamour.WithAutoStyle(),
			glamour.WithWordWrap(80))
		rendered, _ := renderer.Render(md)
		m.renderedContent = rendered
		m.focus = 0
	}
	return m
}

func (m *FormModel) Init() tea.Cmd {
	return nil
}

func (m *FormModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	switch msg := msg.(type) {
	case tea.KeyMsg:
		switch msg.String() {
		case "ctrl+c", "q":
			return m, tea.Quit
		case "esc":
			//вернуться к списку приложений, чтобы выбрать другое приложение.
		case "enter":
			logrus.Infof("sections %s, focus %d, fields len %d", m.CurrentSection.Name, m.focus, len(m.FieldModels))
			if len(m.FieldModels) == m.focus {
				return m, func() tea.Msg {
					return types.NextSectionMsg{}
				}
			}
		case "tab", "down", "shift+tab", "up":
			key := msg.String()
			if m.focus != len(m.FieldModels) {
				logrus.Infof("1")
				//todo исправить фокус
				field := m.FieldModels[m.focus]
				logrus.Infof("field %s, capture keys %t", field.GetLabel(), field.CaptureKeys())
				if !field.CaptureKeys() {
					if key == "tab" || key == "down" {
						m.focus++
					} else if key == "shift+tab" || key == "up" {
						m.focus--
					}
				}
			} else {
				logrus.Infof("2")
				if key == "tab" || key == "down" {
					m.focus++
				} else if key == "shift+tab" || key == "up" {
					m.focus--
				}
			}
			if m.focus == len(m.FieldModels)+1 {
				m.focus = 0
			} else if m.focus < 0 {
				m.focus = len(m.FieldModels)
			}
		}
	case types.SelectedOptionMsg:
		logrus.Infof("chose %+v", msg)
	}
	cmd := m.updateFields(msg)
	return m, cmd
}

func (m *FormModel) View() string {
	res := ""

	if len(m.FieldModels) > 0 {
		for i := range m.FieldModels {
			inputView := m.FieldModels[i].View()
			if m.focus == i {
				res += ui.FormFocusedStyle.Render(inputView)
			} else {
				res += ui.FormUnfocusedStyle.Render(inputView)
			}
			res += "\n"
		}
	}

	button := "\n[ next section ]"
	if m.CurrentSection.Type == "about" {
		res += m.renderedContent
	}
	if m.focus == len(m.FieldModels) {
		res += ui.FormFocusedStyle.Render(button)
	} else {
		res += ui.FormUnfocusedStyle.Render(button)
	}
	return ui.FormStyle.Render(res)
}

func (m *FormModel) updateFields(msg tea.Msg) tea.Cmd {
	var cmds []tea.Cmd
	for i, fieldModel := range m.FieldModels {
		var fieldCmd tea.Cmd
		var updated fields.FieldModel
		if i == m.focus { //если фокус установлен на текущем поле, то текущее поле активируем и передаем ему сообщения для обновления
			fieldModel.Focus()
			updated, fieldCmd = fieldModel.Update(msg)
		} else { //если фокус не установлен на текущем поле, то убираем с неё фокус, передаем сообщения, но только те, что не содержат действий клавиатуры
			fieldModel.Blur()
			if _, ok := msg.(tea.KeyMsg); !ok {
				updated, fieldCmd = fieldModel.Update(msg)
			}
		}
		if updated != nil {
			m.FieldModels[i] = updated
			for _, sectionField := range m.CurrentSection.Fields {
				if sectionField.Name == fieldModel.GetLabel() {
					oldValue := sectionField.Variable.Value
					newValue := fieldModel.GetValue()
					if oldValue != newValue {
						cmds = append(cmds, func() tea.Msg {
							return types.SugarMsg{
								VariableName: sectionField.VariableName,
								FieldName:    sectionField.Name,
								Compute:      sectionField.Compute,
								Focus:        m.focus,
							}
						})
						sectionField.Variable.Value = newValue //recompute вызывать.
					}
				}
			}
		}
		if fieldCmd != nil {
			cmds = append(cmds, fieldCmd)
		}
	}
	return tea.Batch(cmds...)
}