package widgets

import (
	"ArinDash/apis/kaneo"
	"ArinDash/util"
	"context"
	"fmt"
	"math"
	"sort"
	"strings"
	"time"

	"github.com/mum4k/termdash/cell"
	"github.com/mum4k/termdash/terminal/terminalapi"
	"github.com/mum4k/termdash/widgetapi"
	"github.com/mum4k/termdash/widgets/text"
)

type BoardOptions struct {
}

func Board() BoardOptions {
	widgetOptions["BoardOptions"] = createBoard
	return BoardOptions{}
}

func createBoard(ctx context.Context, _ terminalapi.Terminal, _ interface{}) widgetapi.Widget {
	widget := util.PanicOnErrorWithResult(NewBoardText())
	go util.Periodic(ctx, 1*time.Minute, func() error {
		widget.Reset()
		widget.board = kaneo.FetchBoard()
		if widget.board.Status != "ok" {
			if err := widget.Write("Error:"+widget.board.Status, text.WriteCellOpts(cell.FgColor(cell.ColorRed))); err != nil {
				return nil
			}
		}

		sort.Slice(widget.board.Columns, func(i, j int) bool {
			return widget.board.Columns[i].Position < widget.board.Columns[j].Position
		})

		colWidth := 66 / len(widget.board.Columns)

		if err := widget.Write("┌"+strings.Repeat(strings.Repeat("─", colWidth)+"┬", len(widget.board.Columns)-1)+strings.Repeat("─", colWidth)+"┐\n", text.WriteCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
			return err
		}

		if err := widget.Write("│", text.WriteCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
			return nil
		}
		for i, column := range widget.board.Columns {
			if i != 0 {
				if err := widget.Write("│", text.WriteCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
					return nil
				}
			}
			name := column.Name
			if len(name) > colWidth {
				name = name[0:colWidth-2] + ".."
			}
			if len(name) < colWidth {
				name = name + strings.Repeat(" ", colWidth-len(name))
			}

			if err := widget.Write(name, text.WriteCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
				return nil
			}
		}
		if err := widget.Write("│\n", text.WriteCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
			return nil
		}

		if err := writeMiddle(widget, colWidth, widget.board.Columns); err != nil {
			return err
		}

		for i := range 10 {
			if i != 0 {
				if err := writeMiddle(widget, colWidth, widget.board.Columns); err != nil {
					return err
				}
			}
			if err := widget.Write("│", text.WriteCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
				return nil
			}
			for j, column := range widget.board.Columns {
				sort.Slice(column.Tasks, func(i, j int) bool {
					return column.Tasks[i].Position < column.Tasks[j].Position
				})

				if j != 0 {
					if err := widget.Write("│", text.WriteCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
						return nil
					}
				}
				if len(column.Tasks) > i {
					title := column.Tasks[i].Title
					if len(title) > colWidth {
						title = title[0:colWidth-2] + ".."
					}
					if len(title) < colWidth {
						title = title + strings.Repeat(" ", colWidth-len(title))
					}

					fgColor := cell.ColorGreen
					bgColor := cell.ColorBlack
					durr := int(column.Tasks[i].DueDate.Sub(time.Now()).Hours() / 24)
					if durr < 0 {
						durr = math.MaxInt
					}
					if durr < 14 && !column.IsFinal {
						fgColor = cell.ColorBlack
						bgColor = cell.ColorRed
						d := fmt.Sprintf("%02dd", durr)
						title = title[0:colWidth-3] + d
					}
					if durr < 28 && !column.IsFinal {
						bgColor = cell.ColorYellow
						fgColor = cell.ColorBlack
						d := fmt.Sprintf("%02dd", durr)
						title = title[0:colWidth-3] + d
					}
					if column.IsFinal {
						bgColor = cell.ColorBlack
						fgColor = cell.ColorGray
					}

					if err := widget.Write(title, text.WriteCellOpts(cell.FgColor(fgColor), cell.BgColor(bgColor), cell.Bold())); err != nil {
						return nil
					}
				} else {
					if err := widget.Write(strings.Repeat(" ", colWidth), text.WriteCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
						return nil
					}
				}
			}
			if err := widget.Write("│\n", text.WriteCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
				return nil
			}
		}

		if err := writeBottom(widget, colWidth, widget.board.Columns); err != nil {
			return err
		}
		return nil
	})
	return widget
}

func writeMiddle(widget *BoardText, colWidth int, columns []kaneo.Column) error {
	if err := widget.Write("├"+strings.Repeat(strings.Repeat("─", colWidth)+"┼", len(columns)-1)+strings.Repeat("─", colWidth)+"┤\n", text.WriteCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
		return err
	}
	return nil
}

func writeBottom(widget *BoardText, colWidth int, columns []kaneo.Column) error {
	if err := widget.Write("└"+strings.Repeat(strings.Repeat("─", colWidth)+"┴", len(columns)-1)+strings.Repeat("─", colWidth)+"┘\n", text.WriteCellOpts(cell.FgColor(cell.ColorWhite))); err != nil {
		return err
	}
	return nil
}

type BoardText struct {
	*text.Text
	Selected int
	board    kaneo.Board
}

func NewBoardText(opts ...text.Option) (*BoardText, error) {
	t, err := text.New(opts...)
	if err != nil {
		return nil, err
	}
	return &BoardText{Text: t}, nil
}