package pages

import (
	"strconv"
	"strings"

	"tasksquire/common"
	"tasksquire/taskwarrior"

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

type ReportPage struct {
	common *common.Common

	activeReport  *taskwarrior.Report
	activeContext *taskwarrior.Context
	activeProject string
	selectedTask  *taskwarrior.Task

	tasks taskwarrior.Tasks

	taskTable  table.Model
	tableStyle table.Styles
	keymap     ReportKeys

	subpage       tea.Model
	subpageActive bool
}

type ReportKeys struct {
	Quit        key.Binding
	Up          key.Binding
	Down        key.Binding
	Select      key.Binding
	ToggleFocus key.Binding
}

func NewReportPage(com *common.Common, report *taskwarrior.Report) *ReportPage {
	s := table.DefaultStyles()
	s.Header = s.Header.
		BorderStyle(lipgloss.NormalBorder()).
		BorderForeground(lipgloss.Color("240")).
		BorderBottom(true).
		Bold(false)
	s.Selected = s.Selected.
		Foreground(lipgloss.Color("229")).
		Background(lipgloss.Color("57")).
		Bold(false)

	keys := ReportKeys{
		Quit: key.NewBinding(
			key.WithKeys("q", "ctrl+c"),
			key.WithHelp("q, ctrl+c", "Quit"),
		),
		Up: key.NewBinding(
			key.WithKeys("k", "up"),
			key.WithHelp("↑/k", "Up"),
		),
		Down: key.NewBinding(
			key.WithKeys("j", "down"),
			key.WithHelp("↓/j", "Down"),
		),
		Select: key.NewBinding(
			key.WithKeys("enter"),
			key.WithHelp("enter", "Select"),
		),
		ToggleFocus: key.NewBinding(
			key.WithKeys("esc"),
			key.WithHelp("esc", "Toggle focus"),
		),
	}

	return &ReportPage{
		common:        com,
		activeReport:  report,
		activeContext: com.TW.GetActiveContext(),
		activeProject: "",
		tableStyle:    s,
		keymap:        keys,
	}
}

func (p ReportPage) Init() tea.Cmd {
	return p.getTasks()
}

func (p ReportPage) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	var cmds []tea.Cmd
	switch msg := msg.(type) {
	case BackMsg:
		p.subpageActive = false
	case TaskMsg:
		p.populateTaskTable(msg)
	case UpdateReportMsg:
		p.activeReport = msg
		cmds = append(cmds, p.getTasks())
	case UpdateContextMsg:
		p.activeContext = msg
		p.common.TW.SetContext(msg)
		cmds = append(cmds, p.getTasks())
	case UpdateProjectMsg:
		p.activeProject = string(msg)
		cmds = append(cmds, p.getTasks())
	case AddedTaskMsg:
		cmds = append(cmds, p.getTasks())
	case tea.WindowSizeMsg:
		p.taskTable.SetWidth(msg.Width - 2)
		p.taskTable.SetHeight(msg.Height - 4)
	case tea.KeyMsg:
		switch {
		case key.Matches(msg, p.common.Keymap.Quit):
			return p, tea.Quit
		case key.Matches(msg, p.common.Keymap.SetReport):
			p.subpage = NewReportPickerPage(p.common, p.activeReport)
			p.subpage.Init()
			p.subpageActive = true
			p.common.PageStack.Push(p)
			return p.subpage, nil
		case key.Matches(msg, p.common.Keymap.SetContext):
			p.subpage = NewContextPickerPage(p.common)
			p.subpage.Init()
			p.subpageActive = true
			p.common.PageStack.Push(p)
			return p.subpage, nil
		case key.Matches(msg, p.common.Keymap.Add):
			p.subpage = NewTaskEditorPage(p.common, taskwarrior.Task{})
			p.subpage.Init()
			p.subpageActive = true
			p.common.PageStack.Push(p)
			return p.subpage, nil
		case key.Matches(msg, p.common.Keymap.SetProject):
			p.subpage = NewProjectPickerPage(p.common, p.activeProject)
			p.subpage.Init()
			p.subpageActive = true
			p.common.PageStack.Push(p)
			return p.subpage, nil
		}
	}

	var cmd tea.Cmd
	p.taskTable, cmd = p.taskTable.Update(msg)
	cmds = append(cmds, cmd)

	if p.tasks != nil {
		p.selectedTask = (*taskwarrior.Task)(p.tasks[p.taskTable.Cursor()])
	}

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

func (p ReportPage) View() string {
	return p.common.Styles.Main.Render(p.taskTable.View()) + "\n"
}

func (p *ReportPage) populateTaskTable(tasks []*taskwarrior.Task) {
	columns := []table.Column{
		{Title: "ID", Width: 4},
		{Title: "Project", Width: 10},
		{Title: "Tags", Width: 10},
		{Title: "Prio", Width: 2},
		{Title: "Due", Width: 10},
		{Title: "Task", Width: 50},
	}
	var rows []table.Row
	for _, task := range tasks {
		rows = append(rows, table.Row{
			strconv.FormatInt(task.Id, 10),
			task.Project,
			strings.Join(task.Tags, ", "),
			task.Priority,
			task.Due,
			task.Description,
		})
	}

	p.taskTable = table.New(
		table.WithColumns(columns),
		table.WithRows(rows),
		table.WithFocused(true),
		// table.WithHeight(7),
		// table.WithWidth(100),
	)
	p.taskTable.SetStyles(p.tableStyle)
}

func (p *ReportPage) getTasks() tea.Cmd {
	return func() tea.Msg {
		filters := []string{}
		if p.activeProject != "" {
			filters = append(filters, "project:"+p.activeProject)
		}
		p.tasks = p.common.TW.GetTasks(p.activeReport, filters...)
		return TaskMsg(p.tasks)
	}
}

type TaskMsg taskwarrior.Tasks