#!/usr/bin/env bun

/**
 * Extract model information from shared/recommended-models.md
 * and generate TypeScript types for use in Claudish
 */

import { readFileSync, writeFileSync } from "node:fs";
import { join } from "node:path";

interface ModelInfo {
	name: string;
	description: string;
	priority: number;
	provider: string;
}

interface ExtractedModels {
	[key: string]: ModelInfo;
}

function extractModels(markdownContent: string): ExtractedModels {
	const models: ExtractedModels = {};
	let priority = 1;

	// Extract from Quick Reference section (lines 11-30)
	const quickRefMatch = markdownContent.match(
		/## Quick Reference - Model IDs Only\n\n([\s\S]*?)\n---/,
	);
	if (!quickRefMatch) {
		throw new Error("Could not find Quick Reference section");
	}

	const quickRef = quickRefMatch[1];
	const lines = quickRef.split("\n");

	for (const line of lines) {
		// Match pattern: - `model-id` - Description (may contain commas), $price/1M or FREE, contextK/M [⭐]
		// Use non-greedy match and look for $ or FREE to find the price section
		const match = line.match(
			/^- `([^`]+)` - (.+?), (?:\$[\d.]+\/1M|FREE), ([\dKM]+)(?: ⭐)?$/,
		);
		if (match) {
			const [, modelId, description] = match;

			// Determine provider from model ID
			let provider = "Unknown";
			if (modelId.startsWith("x-ai/")) provider = "xAI";
			else if (modelId.startsWith("minimax/")) provider = "MiniMax";
			else if (modelId.startsWith("z-ai/")) provider = "Zhipu AI";
			else if (modelId.startsWith("openai/")) provider = "OpenAI";
			else if (modelId.startsWith("google/")) provider = "Google";
			else if (modelId.startsWith("qwen/")) provider = "Alibaba";
			else if (modelId.startsWith("deepseek/")) provider = "DeepSeek";
			else if (modelId.startsWith("tngtech/")) provider = "TNG Tech";
			else if (modelId.startsWith("openrouter/")) provider = "OpenRouter";
			else if (modelId.startsWith("anthropic/")) provider = "Anthropic";

			// Extract short name from description
			const name = description.trim();

			models[modelId] = {
				name,
				description: description.trim(),
				priority: priority++,
				provider,
			};
		}
	}

	// Add custom option
	models.custom = {
		name: "Custom Model",
		description: "Enter any OpenRouter model ID manually",
		priority: 999,
		provider: "Custom",
	};

	return models;
}

function generateTypeScript(models: ExtractedModels): string {
	const modelIds = Object.keys(models)
		.filter((id) => id !== "custom")
		.map((id) => `  | "${id}"`)
		.join("\n");

	const modelInfo = Object.entries(models)
		.map(([id, info]) => {
			return `  "${id}": {
    name: "${info.name}",
    description: "${info.description}",
    priority: ${info.priority},
    provider: "${info.provider}",
  }`;
		})
		.join(",\n");

	return `// AUTO-GENERATED from shared/recommended-models.md
// DO NOT EDIT MANUALLY - Run 'bun run extract-models' to regenerate

import type { OpenRouterModel } from "./types.js";

export const DEFAULT_MODEL: OpenRouterModel = "x-ai/grok-code-fast-1";
export const DEFAULT_PORT_RANGE = { start: 3000, end: 9000 };

// Model metadata for validation and display
export const MODEL_INFO: Record<
  OpenRouterModel,
  { name: string; description: string; priority: number; provider: string }
> = {
${modelInfo},
};

// Environment variable names
export const ENV = {
  OPENROUTER_API_KEY: "OPENROUTER_API_KEY",
  CLAUDISH_MODEL: "CLAUDISH_MODEL",
  CLAUDISH_PORT: "CLAUDISH_PORT",
  CLAUDISH_ACTIVE_MODEL_NAME: "CLAUDISH_ACTIVE_MODEL_NAME", // Set by claudish to show active model in status line
  ANTHROPIC_MODEL: "ANTHROPIC_MODEL", // Claude Code standard env var for model selection
  ANTHROPIC_SMALL_FAST_MODEL: "ANTHROPIC_SMALL_FAST_MODEL", // Claude Code standard env var for fast model
  // Claudish model mapping overrides (highest priority)
  CLAUDISH_MODEL_OPUS: "CLAUDISH_MODEL_OPUS",
  CLAUDISH_MODEL_SONNET: "CLAUDISH_MODEL_SONNET",
  CLAUDISH_MODEL_HAIKU: "CLAUDISH_MODEL_HAIKU",
  CLAUDISH_MODEL_SUBAGENT: "CLAUDISH_MODEL_SUBAGENT",
  // Claude Code standard model configuration (fallback if CLAUDISH_* not set)
  ANTHROPIC_DEFAULT_OPUS_MODEL: "ANTHROPIC_DEFAULT_OPUS_MODEL",
  ANTHROPIC_DEFAULT_SONNET_MODEL: "ANTHROPIC_DEFAULT_SONNET_MODEL",
  ANTHROPIC_DEFAULT_HAIKU_MODEL: "ANTHROPIC_DEFAULT_HAIKU_MODEL",
  CLAUDE_CODE_SUBAGENT_MODEL: "CLAUDE_CODE_SUBAGENT_MODEL",
} as const;

// OpenRouter API Configuration
export const OPENROUTER_API_URL = "https://openrouter.ai/api/v1/chat/completions";
export const OPENROUTER_HEADERS = {
  "HTTP-Referer": "https://github.com/MadAppGang/claude-code",
  "X-Title": "Claudish - OpenRouter Proxy",
} as const;
`;
}

function generateTypes(models: ExtractedModels): string {
	const modelIds = Object.keys(models)
		.filter((id) => id !== "custom")
		.map((id) => `  "${id}"`)
		.join(",\n");

	return `// AUTO-GENERATED from shared/recommended-models.md
// DO NOT EDIT MANUALLY - Run 'bun run extract-models' to regenerate

// OpenRouter Models - Top Recommended for Development (Priority Order)
export const OPENROUTER_MODELS = [
${modelIds},
  "custom",
] as const;

export type OpenRouterModel = (typeof OPENROUTER_MODELS)[number];
`;
}

// Main execution
try {
	const sharedModelsPath = join(
		import.meta.dir,
		"../../../shared/recommended-models.md",
	);
	const configPath = join(import.meta.dir, "../src/config.ts");
	const typesPath = join(import.meta.dir, "../src/types.ts");

	console.log("📖 Reading shared/recommended-models.md...");
	const markdownContent = readFileSync(sharedModelsPath, "utf-8");

	console.log("🔍 Extracting model information...");
	const models = extractModels(markdownContent);

	console.log(`✅ Found ${Object.keys(models).length - 1} models + custom option`);

	console.log("📝 Generating config.ts...");
	const configCode = generateTypeScript(models);
	writeFileSync(configPath, configCode);

	console.log("📝 Generating types.ts...");
	const typesCode = generateTypes(models);
	const existingTypes = readFileSync(typesPath, "utf-8");

	// Replace OPENROUTER_MODELS array and OpenRouterModel type, keep other types
	// Handle both auto-generated and manual versions
	let updatedTypes = existingTypes;

	// Try to replace auto-generated section first
	if (existingTypes.includes("// AUTO-GENERATED")) {
		updatedTypes = existingTypes.replace(
			/\/\/ AUTO-GENERATED[\s\S]*?export type OpenRouterModel = \(typeof OPENROUTER_MODELS\)\[number\];/,
			typesCode.trim(),
		);
	} else {
		// First time - replace manual OPENROUTER_MODELS section
		updatedTypes = existingTypes.replace(
			/\/\/ OpenRouter Models[\s\S]*?export type OpenRouterModel = \(typeof OPENROUTER_MODELS\)\[number\];/,
			typesCode.trim(),
		);
	}

	writeFileSync(typesPath, updatedTypes);

	console.log("✅ Successfully generated TypeScript files");
	console.log("");
	console.log("Models:");
	for (const [id, info] of Object.entries(models)) {
		if (id !== "custom") {
			console.log(`  • ${id} - ${info.name} (${info.provider})`);
		}
	}
} catch (error) {
	console.error("❌ Error:", error);
	process.exit(1);
}