#!/usr/bin/env bun
import { access, mkdir, writeFile } from "node:fs/promises";
import { dirname, join, resolve } from "node:path";
import { Command } from "commander";
import {
	exportFromConfig,
	findConfigFile,
	loadExportConfig,
} from "@sitebase/core";

const program = new Command();

program
	.name("sitebase")
	.description("CLI tools for standard.site publications")
	.version("0.0.1");

program
	.command("export")
	.description("Export a publication to markdown files")
	.option(
		"-c, --config <file>",
		"Path to config file (auto-discovers sitebase.config.{ts,js} if not specified)",
	)
	.action(async (options: { config?: string }) => {
		try {
			// Find config file
			let configPath = options.config ? resolve(options.config) : null;

			if (!configPath) {
				// Auto-discover
				configPath = await findConfigFile(process.cwd());
				if (!configPath) {
					console.error(
						"No config file found. Create sitebase.config.ts or specify with --config",
					);
					process.exit(1);
				}
			}

			console.log(`Using config: ${configPath}`);
			const config = await loadExportConfig(configPath);

			console.log(`Exporting publication: ${config.publicationUri}`);
			console.log(`Export targets: ${config.exports.length}`);

			const configDir = dirname(configPath);
			const exportResults = await exportFromConfig(config, configDir);

			// Print results for each target
			for (const [i, result] of exportResults.entries()) {
				const target = config.exports[i];
				console.log(`\nTarget ${i + 1}: ${target?.outputDir}`);
				console.log(`  Documents processed: ${result.documentsProcessed}`);
				console.log(`  Documents skipped: ${result.documentsSkipped}`);
				console.log(`  Files written: ${result.filesWritten.length}`);

				if (result.warnings.length > 0) {
					console.log(`  Warnings:`);
					for (const warning of result.warnings) {
						console.log(`    - ${warning}`);
					}
				}

				if (result.filesWritten.length > 0) {
					console.log(`  Files:`);
					for (const file of result.filesWritten) {
						console.log(`    - ${file}`);
					}
				}
			}
		} catch (error) {
			console.error(
				`Error: ${error instanceof Error ? error.message : String(error)}`,
			);
			process.exit(1);
		}
	});

program
	.command("init")
	.description("Create a sitebase.config.ts file with starter configuration")
	.action(async () => {
		const cwd = process.cwd();
		const configPath = join(cwd, "sitebase.config.ts");
		const templatesDir = join(cwd, "templates");
		const templatePath = join(templatesDir, "post.hbs");

		// Check if config already exists
		try {
			await access(configPath);
			console.error("Error: sitebase.config.ts already exists");
			process.exit(1);
		} catch {
			// File doesn't exist, we can proceed
		}

		// Config file template with comments
		const configContent = `// sitebase.config.ts
import type { ExportConfig } from "@sitebase/core";
import { slugify } from "@sitebase/core";

/**
 * Sitebase Export Configuration
 *
 * This file configures how your AT Protocol publication is exported to markdown files.
 * For more information, see: https://github.com/sethetter/sitebase
 */
const config: ExportConfig = {
  // The AT URI of your publication (required)
  // Format: at://did:plc:xxx/site.standard.publication/rkey
  // Find this in your PDS or use the standard.site dashboard
  publicationUri: "at://YOUR_DID/site.standard.publication/YOUR_RKEY",

  // Export targets - each entry exports documents to a different location/format
  // You can have multiple targets to export the same publication different ways
  exports: [
    {
      // Directory where markdown files will be written (relative to this config file)
      outputDir: "./content",

      // Optional: Only include documents with at least one of these tags
      // If not specified, all documents are included (except those matching excludeTags)
      // includeTags: ["post", "article"],

      // Optional: Exclude documents with any of these tags
      // Defaults to ["draft"] if includeTags is not specified
      // excludeTags: ["draft", "private"],

      // Function to generate the filename for each document (required)
      // Receives an object with: title, path, publishedAt, updatedAt, tags, content, etc.
      filename: (data) => {
        // Example: "2024-01-15_my-post-title.md"
        const date = data.publishedAt?.slice(0, 10) || "undated";
        return \`\${date}_\${slugify(data.title)}.md\`;
      },

      // Optional: Path to a Handlebars template for content generation
      // The template receives the same data object as the filename function
      contentTemplate: "./templates/post.hbs",

      // Optional: Function to generate content (overrides contentTemplate if both specified)
      // content: (data) => \`---
      // title: "\${data.title}"
      // date: \${data.publishedAt}
      // ---
      //
      // \${data.content}
      // \`,
    },
  ],
};

export default config;
`;

		// Handlebars template for posts
		const templateContent = `---
title: "{{title}}"
{{#if description}}
description: "{{description}}"
{{/if}}
{{#if publishedAt}}
date: {{publishedAt}}
{{/if}}
{{#if updatedAt}}
updated: {{updatedAt}}
{{/if}}
{{#if tags.length}}
tags:
{{#each tags}}
  - {{this}}
{{/each}}
{{/if}}
---

{{{content}}}
`;

		try {
			// Write config file
			await writeFile(configPath, configContent, "utf-8");
			console.log("Created sitebase.config.ts");

			// Create templates directory and template file
			await mkdir(templatesDir, { recursive: true });
			await writeFile(templatePath, templateContent, "utf-8");
			console.log("Created templates/post.hbs");

			console.log("\nNext steps:");
			console.log(
				"  1. Update publicationUri in sitebase.config.ts with your publication's AT URI",
			);
			console.log("  2. Customize the export targets as needed");
			console.log("  3. Run: sitebase export");
		} catch (error) {
			console.error(
				`Error: ${error instanceof Error ? error.message : String(error)}`,
			);
			process.exit(1);
		}
	});

program.parse();