package main

import (
	"fmt"
	"os"
	"strings"

	"go.wit.com/lib/protobuf/chatpb"
	"go.wit.com/log"
)

const termWidth = 120 // The target width for the formatted output boxes.

func main() {
	if len(os.Args) != 2 {
		fmt.Fprintf(os.Stderr, "Usage: go run format_rich_log.go <path_to_log_file>\n")
		os.Exit(1)
	}
	filename := os.Args[1]

	data, err := os.ReadFile(filename)
	if err != nil {
		log.Fatalf("Error reading file %s: %v", filename, err)
	}

	logData, err := chatpb.UnmarshalChatsTEXT(data)
	if err != nil {
		log.Fatalf("Error unmarshaling log file %s: %v", filename, err)
	}

	for _, chat := range logData.GetChats() {
		author := chat.GetFrom().String()
		content := chat.GetContent()

		// Print the conversational content first.
		if content != "" {
			fmt.Printf("✦ %s: %s\n", author, content)
		}

		// Now, format and print any tool calls.
		for _, toolCall := range chat.GetToolCalls() {
			printToolCallBox(toolCall)
		}
	}
}

// printToolCallBox handles the decorative formatting for a single tool call.
func printToolCallBox(tc *chatpb.ToolCall) {
	boxWidth := termWidth - 2 // Account for the side borders.

	// ---
	fmt.Printf(" ╭%s╮\n", strings.Repeat("─", boxWidth))

	// ---
	header := fmt.Sprintf(" ✔  %s %s (%s)", tc.GetName(), tc.GetInput(), tc.GetDescription())
	printWrappedLine(header, boxWidth)
	printEmptyLine(boxWidth)

	// ---
	if stdout := tc.GetOutputStdout(); stdout != "" {
		for _, line := range strings.Split(stdout, "\n") {
			printWrappedLine("    "+line, boxWidth)
		}
	}

	// ---
	if stderr := tc.GetOutputStderr(); stderr != "" {
		for _, line := range strings.Split(stderr, "\n") {
			printWrappedLine("    "+line, boxWidth)
		}
	}

	printEmptyLine(boxWidth)

	// ---
	fmt.Printf(" ╰%s╯\n", strings.Repeat("─", boxWidth))
}

// printWrappedLine prints a line of text, wrapping it if it's too long.
func printWrappedLine(text string, width int) {
	if len(text) == 0 {
		printEmptyLine(width)
		return
	}

	// Simple wrapping logic.
	for len(text) > width {
		fmt.Printf(" │ %-*s │\n", width, text[:width])
		text = text[width:]
	}
	fmt.Printf(" │ %-*s │\n", width, text)
}

// printEmptyLine prints a blank line within the box.
func printEmptyLine(width int) {
	fmt.Printf(" │ %*s │\n", width, "")
}