package tui

import (
	"fmt"
	"strings"
	"time"

	tea "charm.land/bubbletea/v2"
	"charm.land/lipgloss/v2"

	"superwork-tui/internal/logging"
)

// ── message types ─────────────────────────────────────────────────────────────

type logsSnapshotMsg struct {
	entries []logging.Entry
}

type logsTickMsg struct{}

func logsTickCmd() tea.Cmd {
	return tea.Tick(time.Second, func(t time.Time) tea.Msg {
		return logsTickMsg{}
	})
}

// ── styles ────────────────────────────────────────────────────────────────────

var (
	logInfoStyle  = lipgloss.NewStyle().Foreground(lipgloss.Color("2"))
	logWarnStyle  = lipgloss.NewStyle().Foreground(lipgloss.Color("3"))
	logErrorStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("1"))
)

// ── open ──────────────────────────────────────────────────────────────────────

func (m Model) openLogs() (Model, tea.Cmd) {
	m.state = stateLogs
	m.logEntries = logging.Default.Snapshot()
	return m, logsTickCmd()
}

// ── key handling ──────────────────────────────────────────────────────────────

func (m Model) handleLogsKey(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
	switch msg.String() {
	case "esc", "ctrl+l":
		m.state = stateLoaded
	}
	return m, nil
}

// ── view ──────────────────────────────────────────────────────────────────────

func (m Model) logsView() string {
	var sb strings.Builder
	sb.WriteString(helpStyle.Render("日志 (Logs)") + "\n")
	sb.WriteString(strings.Repeat("─", 70) + "\n")

	if len(m.logEntries) == 0 {
		sb.WriteString("  (暂无日志)\n")
	} else {
		for _, e := range m.logEntries {
			ts := time.UnixMilli(e.Ts).Format("15:04:05")
			level := renderLogLevel(e.Level)
			line := fmt.Sprintf("  %s  %s  [%s] %s", ts, level, e.Source, e.Message)
			if e.Details != "" {
				line += "  " + e.Details
			}
			sb.WriteString(line + "\n")
		}
	}

	sb.WriteString("\n")
	sb.WriteString(helpStyle.Render("esc close"))
	return sb.String()
}

func renderLogLevel(l logging.Level) string {
	switch l {
	case logging.LevelInfo:
		return logInfoStyle.Render("INFO ")
	case logging.LevelWarn:
		return logWarnStyle.Render("WARN ")
	case logging.LevelError:
		return logErrorStyle.Render("ERROR")
	default:
		return fmt.Sprintf("%-5d", int(l))
	}
}