package pages

import (
	"log/slog"
	"tasksquire/common"
	"tasksquire/components/picker"

	"github.com/charmbracelet/bubbles/key"
	"github.com/charmbracelet/bubbles/list"
	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/lipgloss"
)

type ProjectPickerPage struct {
	common *common.Common
	picker *picker.Picker
}

func NewProjectPickerPage(common *common.Common, activeProject string) *ProjectPickerPage {
	p := &ProjectPickerPage{
		common: common,
	}

	projects := common.TW.GetProjects()
	items := []list.Item{picker.NewItem("(none)")}
	for _, proj := range projects {
		items = append(items, picker.NewItem(proj))
	}

	onSelect := func(item list.Item) tea.Cmd {
		return func() tea.Msg { return projectSelectedMsg{item: item} }
	}

	p.picker = picker.New(common, "Projects", items, onSelect)

	// Set active project
	if activeProject == "" {
		activeProject = "(none)"
	}
	p.picker.SelectItemByFilterValue(activeProject)

	p.SetSize(common.Width(), common.Height())

	return p
}

func (p *ProjectPickerPage) SetSize(width, height int) {
	p.common.SetSize(width, height)

	// Set list size with some padding/limits to look like a picker
	listWidth := width - 4
	if listWidth > 40 {
		listWidth = 40
	}
	listHeight := height - 6
	if listHeight > 20 {
		listHeight = 20
	}
	p.picker.SetSize(listWidth, listHeight)
}

func (p *ProjectPickerPage) Init() tea.Cmd {
	return p.picker.Init()
}

type projectSelectedMsg struct {
	item list.Item
}

func (p *ProjectPickerPage) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	var cmd tea.Cmd

	switch msg := msg.(type) {
	case tea.WindowSizeMsg:
		p.SetSize(msg.Width, msg.Height)
	case projectSelectedMsg:
		proj := msg.item.(picker.Item).Title()
		if proj == "(none)" {
			proj = ""
		}

		model, err := p.common.PopPage()
		if err != nil {
			slog.Error("page stack empty")
			return nil, tea.Quit
		}
		return model, func() tea.Msg { return UpdateProjectMsg(proj) }
	case tea.KeyMsg:
		switch {
		case key.Matches(msg, p.common.Keymap.Back):
			model, err := p.common.PopPage()
			if err != nil {
				slog.Error("page stack empty")
				return nil, tea.Quit
			}
			return model, BackCmd
		}
	}

	_, cmd = p.picker.Update(msg)
	return p, cmd
}

func (p *ProjectPickerPage) View() string {
	width := p.common.Width() - 4
	if width > 40 {
		width = 40
	}

	content := p.picker.View()
	styledContent := lipgloss.NewStyle().Width(width).Render(content)

	return lipgloss.Place(
		p.common.Width(),
		p.common.Height(),
		lipgloss.Center,
		lipgloss.Center,
		p.common.Styles.Base.Render(styledContent),
	)
}

func (p *ProjectPickerPage) updateProjectCmd() tea.Msg {
	return nil
}

type UpdateProjectMsg string