package pages

import (
	"log/slog"
	"slices"
	"tasksquire/common"
	"tasksquire/taskwarrior"

	"github.com/charmbracelet/bubbles/key"
	tea "github.com/charmbracelet/bubbletea"
	"github.com/charmbracelet/huh"
)

type ReportPickerPage struct {
	common  *common.Common
	reports taskwarrior.Reports
	form    *huh.Form
}

func NewReportPickerPage(common *common.Common, activeReport *taskwarrior.Report) *ReportPickerPage {
	p := &ReportPickerPage{
		common:  common,
		reports: common.TW.GetReports(),
	}

	selected := activeReport.Name

	options := make([]string, 0)
	for _, r := range p.reports {
		options = append(options, r.Name)
	}
	slices.Sort(options)

	p.form = huh.NewForm(
		huh.NewGroup(
			huh.NewSelect[string]().
				Key("report").
				Options(huh.NewOptions(options...)...).
				Title("Reports").
				Description("Choose a report").
				Value(&selected),
		),
	).
		WithShowHelp(false).
		WithShowErrors(false)

	return p
}

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

func (p *ReportPickerPage) Init() tea.Cmd {
	return p.form.Init()
}

func (p *ReportPickerPage) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	var cmds []tea.Cmd

	switch msg := msg.(type) {
	case tea.WindowSizeMsg:
		p.SetSize(msg.Width, msg.Height)
	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
		}
	}

	f, cmd := p.form.Update(msg)
	if f, ok := f.(*huh.Form); ok {
		p.form = f
		cmds = append(cmds, cmd)
	}

	if p.form.State == huh.StateCompleted {
		cmds = append(cmds, []tea.Cmd{BackCmd, p.updateReportCmd}...)
		model, err := p.common.PopPage()
		if err != nil {
			slog.Error("page stack empty")
			return nil, tea.Quit
		}
		return model, tea.Batch(cmds...)
	}

	return p, tea.Batch(cmds...)
}

func (p *ReportPickerPage) View() string {
	return p.common.Styles.Base.Render(p.form.View())
}

func (p *ReportPickerPage) updateReportCmd() tea.Msg {
	return UpdateReportMsg(p.common.TW.GetReport(p.form.GetString("report")))
}

type UpdateReportMsg *taskwarrior.Report