package tui

import (
	"fmt"
	"strings"
	"time"

	"github.com/charmbracelet/lipgloss"

	"git.unkin.net/unkin/forgebot/pkg/models"
)

func renderCard(task models.Task, width int, selected bool) string {
	color := statusColors[task.Status]

	style := cardStyle.Width(width - 4)
	if selected {
		style = cardSelectedStyle.Width(width - 4).BorderForeground(color)
	}

	cmd := lipgloss.NewStyle().Bold(true).Render(task.Command)

	repo := task.Repository
	maxRepo := width - 6
	if maxRepo > 0 && len(repo) > maxRepo {
		repo = repo[:maxRepo-1] + "…"
	}
	repo = dimStyle.Render(repo)

	var ref string
	if task.IssueNumber > 0 {
		ref = fmt.Sprintf("#%d", task.IssueNumber)
	} else if task.PRNumber > 0 {
		ref = fmt.Sprintf("PR#%d", task.PRNumber)
	}
	if task.Ref != "" {
		if ref != "" {
			ref += " " + task.Ref
		} else {
			ref = task.Ref
		}
	}
	ref = dimStyle.Render(ref)

	elapsed := relativeTime(task.CreatedAt)
	if task.Status == models.StatusInProgress && task.StartedAt != nil {
		elapsed = relativeTime(*task.StartedAt)
	}
	if (task.Status == models.StatusDone || task.Status == models.StatusWontdo) && task.CompletedAt != nil {
		elapsed = relativeTime(*task.CompletedAt)
	}

	bottomLine := elapsed
	if task.Author != "" {
		pad := width - 6 - len(elapsed) - len(task.Author)
		if pad < 1 {
			pad = 1
		}
		bottomLine = elapsed + strings.Repeat(" ", pad) + task.Author
	}
	bottomLine = dimStyle.Render(bottomLine)

	content := lipgloss.JoinVertical(lipgloss.Left, cmd, repo, ref, bottomLine)

	if task.Status == models.StatusWontdo {
		content = dimStyle.Render(content)
	}
	if task.ErrorMessage != "" && task.Status == models.StatusTodo {
		errHint := task.ErrorMessage
		if len(errHint) > width-6 {
			errHint = errHint[:width-7] + "…"
		}
		content += "\n" + errStyle.Render(errHint)
	}

	return style.Render(content)
}

func relativeTime(t time.Time) string {
	d := time.Since(t)
	switch {
	case d < time.Minute:
		return "just now"
	case d < time.Hour:
		return fmt.Sprintf("%dm ago", int(d.Minutes()))
	case d < 24*time.Hour:
		return fmt.Sprintf("%dh ago", int(d.Hours()))
	default:
		return fmt.Sprintf("%dd ago", int(d.Hours()/24))
	}
}