// This file contains functions for formatting and printing chat logs to the terminal.
// These functions operate exclusively on the in-memory protobuf data structures.
// They do NOT access the filesystem; all content (from content files, snippets, etc.)
// is expected to have been loaded into the 'Content' fields of the protobuf messages
// before these functions are called.

package main

import (
	"fmt"
	"path/filepath"
	"strings"

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

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

// prettyFormatChat is the main entry point to print a detailed view of a Chat topic.
func prettyFormatChat(chat *chatpb.Chat) {
	fmt.Printf("\n========================================================\n")
	fmt.Printf("== Chat Topic: %s (UUID: %s)\n", chat.GetChatName(), chat.GetUuid())
	fmt.Printf("========================================================\n\n")

	for _, entry := range chat.GetEntries() {
		author := entry.GetFrom().String()
		var formattedTime string
		if ctime := entry.GetCtime(); ctime != nil {
			t := ctime.AsTime()
			formattedTime = t.Format("2006-01-02 15:04:05")
		} else {
			formattedTime = "No Timestamp"
		}

		// Use the in-memory Content field directly.
		content := entry.GetContent()

		if content != "" {
			fmt.Printf("✦ %s (%s):\n%s\n", author, formattedTime, strings.TrimSpace(content))
		}

		if table := entry.GetTable(); table != nil {
			printTable(table)
		}
		for _, toolCall := range entry.GetToolCalls() {
			printToolCallBox(toolCall)
		}
		if snippets := entry.GetSnippets(); snippets != nil {
			for _, snippet := range snippets {
				printCodeSnippet(snippet)
			}
		}
		fmt.Println()
	}
}

func printTable(table *chatpb.Table) {
	if table == nil || len(table.GetRows()) == 0 {
		return
	}
	fmt.Println("┌─[ Table Data ]──────────────────────────────────────────")
	for _, row := range table.GetRows() {
		fmt.Printf("│ %s\n", strings.Join(row.GetFields(), " │ "))
	}
	fmt.Printf("└─────────────────────────────────────────────────────────\n\n")
}

func printCodeSnippet(snippet *chatpb.CodeSnippet) {
	// Use the in-memory Content field directly.
	code := snippet.GetContent()
	language := filepath.Base(snippet.GetFilename()) // Still useful for display
	fmt.Printf("┌─[ Code Snippet: %s ]──────────────────────────────────\n", language)
	for _, line := range strings.Split(strings.TrimSpace(code), "\n") {
		fmt.Printf("│ %s\n", line)
	}
	fmt.Printf("└─────────────────────────────────────────────────────────\n\n")
}

func printToolCallBox(tc *chatpb.ToolCall) {
	boxWidth := termWidth - 2
	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))
}

func printWrappedLine(text string, width int) {
	if len(text) == 0 {
		printEmptyLine(width)
		return
	}
	for len(text) > width {
		fmt.Printf(" │ %-*s │\n", width, text[:width])
		text = text[width:]
	}
	fmt.Printf(" │ %-*s │\n", width, text)
}

func printEmptyLine(width int) {
	fmt.Printf(" │ %*s │\n", width, "")
}