package reporter

import (
	"fmt"
	"os"
	"strconv"

	"git.red-panda.pet/pandaware/lipgloss-catppuccin"
	"github.com/charmbracelet/lipgloss"
)

var (
	colors = catppuccin.Macchiato

	lineStyle    = lipgloss.NewStyle().Underline(true)
	contextStyle = lipgloss.NewStyle().Foreground(colors.Text)
	bracketStyle = lipgloss.NewStyle().Foreground(colors.Overlay2)

	messageStyle = lipgloss.NewStyle().Foreground(colors.Text)

	levelTagStyles = map[Level]lipgloss.Style{
		LevelError: lipgloss.NewStyle().Foreground(colors.Red),
		LevelInfo:  lipgloss.NewStyle().Foreground(colors.Teal),
		LevelDebug: lipgloss.NewStyle().Foreground(colors.Green),
		LevelWarn:  lipgloss.NewStyle().Foreground(colors.Yellow),
		LevelFatal: lipgloss.NewStyle().Foreground(colors.Mauve),
	}
)

//go:generate stringer -type Level -trimprefix Level
type Level uint8

const (
	LevelDebug Level = iota
	LevelInfo
	LevelWarn
	LevelError
	LevelFatal
)

var currentLevel = LevelWarn

func SetLevel(level Level) {
	currentLevel = level
}

func bracketed(content, bracketsStr string) string {
	brackets := []rune(bracketsStr)
	if len(brackets) != 2 {
		panic("invariant violation")
	}
	open := string(brackets[0])
	close := string(brackets[1])
	return bracketStyle.Render(open) + content + bracketStyle.Render(close)
}

func Log(level Level, component, module string, line int, message string) {
	if currentLevel > level {
		return
	}

	ctx := module

	if module == "" {
		ctx = "<nil>"
	}

	if line > 0 {
		ctx += " at line " + lineStyle.Render(
			strconv.Itoa(line),
		)
	}

	levelStr := level.String()

	if style, ok := levelTagStyles[level]; ok {
		levelStr = style.Render(levelStr)
	}

	fmt.Printf("%s %s %s: %s\n",
		bracketed(levelStr, "[]"),
		bracketed(contextStyle.Render(component), "<>"),
		bracketed(contextStyle.Render(ctx), "()"),
		messageStyle.Render(message),
	)
}

func Debug(line int, component, module, message string) {
	Log(LevelDebug, component, module, line, message)
}

func Info(line int, component, module, message string) {
	Log(LevelInfo, component, module, line, message)
}

func Warn(line int, component, module, message string) {
	Log(LevelWarn, component, module, line, message)
}

func Error(line int, component, module, message string) {
	Log(LevelError, component, module, line, message)
}

func Fatal(exitCode, line int, component, module, message string) {
	Log(LevelFatal, component, module, line, message)
	os.Exit(exitCode)
}

// Deprecated: Use `Error` instead
func Err(line int, message string) {
	Report(line, "unknown", message)
}

// Deprecated: Use `Error` instead
func Report(line int, where, message string) {
	Error(line, "unknown", where, message)
}