import path from "node:path";
import {
	cancel,
	intro,
	isCancel,
	log,
	outro,
	select,
	spinner,
} from "@clack/prompts";
import { consola } from "consola";
import fs from "fs-extra";
import pc from "picocolors";
import yargs from "yargs";
import { hideBin } from "yargs/helpers";
import { DEFAULT_CONFIG } from "./constants";
import { createProject } from "./helpers/create-project";
import { gatherConfig } from "./prompts/config-prompts";
import { getProjectName } from "./prompts/project-name";
import type {
	ProjectAddons,
	ProjectApi,
	ProjectBackend,
	ProjectConfig,
	ProjectDBSetup,
	ProjectDatabase,
	ProjectExamples,
	ProjectFrontend,
	ProjectOrm,
	ProjectPackageManager,
	ProjectRuntime,
	YargsArgv,
} from "./types";
import { displayConfig } from "./utils/display-config";
import { generateReproducibleCommand } from "./utils/generate-reproducible-command";
import { getLatestCLIVersion } from "./utils/get-latest-cli-version";
import { renderTitle } from "./utils/render-title";

const exit = () => process.exit(0);
process.on("SIGINT", exit);
process.on("SIGTERM", exit);

async function main() {
	const startTime = Date.now();

	try {
		const argv = await yargs(hideBin(process.argv))
			.scriptName("create-better-t-stack")
			.usage(
				"$0 [project-directory] [options]",
				"Create a new Better-T Stack project",
			)
			.positional("project-directory", {
				describe: "Project name/directory",
				type: "string",
			})
			.option("yes", {
				alias: "y",
				type: "boolean",
				describe: "Use default configuration and skip prompts",
				default: false,
			})
			.option("database", {
				type: "string",
				describe: "Database type",
				choices: ["none", "sqlite", "postgres", "mysql", "mongodb"],
			})
			.option("orm", {
				type: "string",
				describe: "ORM type",
				choices: ["drizzle", "prisma", "mongoose", "none"],
			})
			.option("auth", {
				type: "boolean",
				describe: "Include authentication (use --no-auth to exclude)",
			})
			.option("frontend", {
				type: "array",
				string: true,
				describe: "Frontend types",
				choices: [
					"tanstack-router",
					"react-router",
					"tanstack-start",
					"next",
					"nuxt",
					"native-nativewind",
					"native-unistyles",
					"svelte",
					"solid",
					"none",
				],
			})
			.option("addons", {
				type: "array",
				string: true,
				describe: "Additional addons",
				choices: [
					"pwa",
					"tauri",
					"starlight",
					"biome",
					"husky",
					"turborepo",
					"none",
				],
			})
			.option("examples", {
				type: "array",
				string: true,
				describe: "Examples to include",
				choices: ["todo", "ai", "none"],
			})
			.option("git", {
				type: "boolean",
				describe: "Initialize git repository (use --no-git to skip)",
			})
			.option("package-manager", {
				alias: "pm",
				type: "string",
				describe: "Package manager",
				choices: ["npm", "pnpm", "bun"],
			})
			.option("install", {
				type: "boolean",
				describe: "Install dependencies (use --no-install to skip)",
			})
			.option("db-setup", {
				type: "string",
				describe: "Database setup",
				choices: ["turso", "neon", "prisma-postgres", "mongodb-atlas", "none"],
			})
			.option("backend", {
				type: "string",
				describe: "Backend framework",
				choices: ["hono", "express", "next", "elysia", "convex", "none"],
			})
			.option("runtime", {
				type: "string",
				describe: "Runtime",
				choices: ["bun", "node", "none"],
			})
			.option("api", {
				type: "string",
				describe: "API type",
				choices: ["trpc", "orpc", "none"],
			})
			.completion()
			.recommendCommands()
			.version(getLatestCLIVersion())
			.alias("version", "v")
			.help()
			.alias("help", "h")
			.strict()
			.wrap(null)
			.parse();

		const options = argv as YargsArgv;
		const cliProjectNameArg = options.projectDirectory;

		renderTitle();
		intro(pc.magenta("Creating a new Better-T-Stack project"));

		let currentPathInput: string;
		let finalPathInput: string;
		let finalResolvedPath: string;
		let finalBaseName: string;
		let shouldClearDirectory = false;

		if (options.yes && cliProjectNameArg) {
			currentPathInput = cliProjectNameArg;
		} else if (options.yes) {
			let defaultName = DEFAULT_CONFIG.relativePath;
			let counter = 1;
			while (
				fs.pathExistsSync(path.resolve(process.cwd(), defaultName)) &&
				fs.readdirSync(path.resolve(process.cwd(), defaultName)).length > 0
			) {
				defaultName = `${DEFAULT_CONFIG.projectName}-${counter}`;
				counter++;
			}
			currentPathInput = defaultName;
		} else {
			currentPathInput = await getProjectName(cliProjectNameArg);
		}

		while (true) {
			const resolvedPath = path.resolve(process.cwd(), currentPathInput);
			const dirExists = fs.pathExistsSync(resolvedPath);
			const dirIsNotEmpty =
				dirExists && fs.readdirSync(resolvedPath).length > 0;

			if (!dirIsNotEmpty) {
				finalPathInput = currentPathInput;
				shouldClearDirectory = false;
				break;
			}

			log.warn(
				`Directory "${pc.yellow(
					currentPathInput,
				)}" already exists and is not empty.`,
			);

			const action = await select<"overwrite" | "merge" | "rename" | "cancel">({
				message: "What would you like to do?",
				options: [
					{
						value: "overwrite",
						label: "Overwrite",
						hint: "Empty the directory and create the project",
					},
					{
						value: "merge",
						label: "Merge",
						hint: "Create project files inside, potentially overwriting conflicts",
					},
					{
						value: "rename",
						label: "Choose a different name/path",
						hint: "Keep the existing directory and create a new one",
					},
					{ value: "cancel", label: "Cancel", hint: "Abort the process" },
				],
				initialValue: "rename",
			});

			if (isCancel(action)) {
				cancel(pc.red("Operation cancelled."));
				process.exit(0);
			}

			if (action === "overwrite") {
				finalPathInput = currentPathInput;
				shouldClearDirectory = true;
				break;
			}
			if (action === "merge") {
				finalPathInput = currentPathInput;
				shouldClearDirectory = false;
				log.info(
					`Proceeding into existing directory "${pc.yellow(
						currentPathInput,
					)}". Files may be overwritten.`,
				);
				break;
			}
			if (action === "rename") {
				log.info("Please choose a different project name or path.");
				currentPathInput = await getProjectName(undefined);
			} else if (action === "cancel") {
				cancel(pc.red("Operation cancelled."));
				process.exit(0);
			}
		}

		if (finalPathInput === ".") {
			finalResolvedPath = process.cwd();
			finalBaseName = path.basename(finalResolvedPath);
		} else {
			finalResolvedPath = path.resolve(process.cwd(), finalPathInput);
			finalBaseName = path.basename(finalResolvedPath);
		}

		if (shouldClearDirectory) {
			const s = spinner();
			s.start(`Clearing directory "${finalResolvedPath}"...`);
			try {
				await fs.emptyDir(finalResolvedPath);
				s.stop(`Directory "${finalResolvedPath}" cleared.`);
			} catch (error) {
				s.stop(pc.red(`Failed to clear directory "${finalResolvedPath}".`));
				consola.error(error);
				process.exit(1);
			}
		} else {
			await fs.ensureDir(finalResolvedPath);
		}

		const flagConfig = processAndValidateFlags(options, finalBaseName);
		const { projectName: _projectNameFromFlags, ...otherFlags } = flagConfig;

		if (!options.yes && Object.keys(otherFlags).length > 0) {
			log.info(pc.yellow("Using these pre-selected options:"));
			log.message(displayConfig(otherFlags));
			log.message("");
		}

		let config: ProjectConfig;
		if (options.yes) {
			config = {
				...DEFAULT_CONFIG,
				...flagConfig,
				projectName: finalBaseName,
				projectDir: finalResolvedPath,
				relativePath: finalPathInput,
			};

			if (config.backend === "convex") {
				config.auth = false;
				config.database = "none";
				config.orm = "none";
				config.api = "none";
				config.runtime = "none";
				config.dbSetup = "none";
				config.examples = ["todo"];
				log.info(
					"Due to '--backend convex' flag, the following options have been automatically set: auth=false, database=none, orm=none, api=none, runtime=none, dbSetup=none, examples=todo",
				);
			} else if (config.backend === "none") {
				config.auth = false;
				config.database = "none";
				config.orm = "none";
				config.api = "none";
				config.runtime = "none";
				config.dbSetup = "none";
				config.examples = [];
				log.info(
					"Due to '--backend none', the following options have been automatically set: --auth=false, --database=none, --orm=none, --api=none, --runtime=none, --db-setup=none, --examples=none",
				);
			} else if (config.database === "none") {
				config.orm = "none";
				log.info(
					"Due to '--database none', '--orm' has been automatically set to 'none'.",
				);

				config.auth = false;
				log.info(
					"Due to '--database none', '--auth' has been automatically set to 'false'.",
				);

				config.dbSetup = "none";
				log.info(
					"Due to '--database none', '--db-setup' has been automatically set to 'none'.",
				);
			}

			log.info(
				pc.yellow("Using default/flag options (config prompts skipped):"),
			);
			log.message(displayConfig(config));
			log.message("");
		} else {
			config = await gatherConfig(
				flagConfig,
				finalBaseName,
				finalResolvedPath,
				finalPathInput,
			);
		}

		await createProject(config);

		log.success(
			pc.blue(
				`You can reproduce this setup with the following command:\n${generateReproducibleCommand(
					config,
				)}`,
			),
		);

		const elapsedTimeInSeconds = ((Date.now() - startTime) / 1000).toFixed(2);
		outro(
			pc.magenta(
				`Project created successfully in ${pc.bold(
					elapsedTimeInSeconds,
				)} seconds!`,
			),
		);
	} catch (error) {
		if (error instanceof Error) {
			if (error.name === "YError") {
				cancel(pc.red(`Invalid arguments: ${error.message}`));
			} else {
				consola.error(`An unexpected error occurred: ${error.message}`);
				if (!error.message.includes("is only supported with")) {
					consola.error(error.stack);
				}
			}
			process.exit(1);
		} else {
			consola.error("An unexpected error occurred.");
			console.error(error);
			process.exit(1);
		}
	}
}

function processAndValidateFlags(
	options: YargsArgv,
	projectName?: string,
): Partial<ProjectConfig> {
	const config: Partial<ProjectConfig> = {};
	const providedFlags: Set<string> = new Set(
		Object.keys(options).filter((key) => key !== "_" && key !== "$0"),
	);

	if (options.api) {
		config.api = options.api as ProjectApi;
		if (options.api === "none") {
			if (
				options.examples &&
				!(options.examples.length === 1 && options.examples[0] === "none")
			) {
				consola.fatal(
					"Cannot use '--examples' when '--api' is set to 'none'. Please remove the --examples flag or choose an API type.",
				);
				process.exit(1);
			}
		}
	}

	if (options.backend) {
		config.backend = options.backend as ProjectBackend;
	}

	if (
		providedFlags.has("backend") &&
		config.backend &&
		config.backend !== "convex" &&
		config.backend !== "none"
	) {
		if (providedFlags.has("runtime") && options.runtime === "none") {
			consola.fatal(
				`'--runtime none' is only supported with '--backend convex' or '--backend none'. Please choose 'bun', 'node', or remove the --runtime flag.`,
			);
			process.exit(1);
		}
	}

	if (options.database) {
		config.database = options.database as ProjectDatabase;
	}
	if (options.orm) {
		config.orm = options.orm as ProjectOrm;
	}
	if (options.auth !== undefined) {
		config.auth = options.auth;
	}
	if (options.git !== undefined) {
		config.git = options.git;
	}
	if (options.install !== undefined) {
		config.install = options.install;
	}
	if (options.runtime) {
		config.runtime = options.runtime as ProjectRuntime;
	}
	if (options.dbSetup) {
		config.dbSetup = options.dbSetup as ProjectDBSetup;
	}
	if (options.packageManager) {
		config.packageManager = options.packageManager as ProjectPackageManager;
	}

	if (projectName) {
		config.projectName = projectName;
	} else if (options.projectDirectory) {
		config.projectName = path.basename(
			path.resolve(process.cwd(), options.projectDirectory),
		);
	}

	if (options.frontend && options.frontend.length > 0) {
		if (options.frontend.includes("none")) {
			if (options.frontend.length > 1) {
				consola.fatal(`Cannot combine 'none' with other frontend options.`);
				process.exit(1);
			}
			config.frontend = [];
		} else {
			const validOptions = options.frontend.filter(
				(f): f is ProjectFrontend => f !== "none",
			);
			const webFrontends = validOptions.filter(
				(f) =>
					f === "tanstack-router" ||
					f === "react-router" ||
					f === "tanstack-start" ||
					f === "next" ||
					f === "nuxt" ||
					f === "svelte" ||
					f === "solid",
			);
			const nativeFrontends = validOptions.filter(
				(f) => f === "native-nativewind" || f === "native-unistyles",
			);

			if (webFrontends.length > 1) {
				consola.fatal(
					"Cannot select multiple web frameworks. Choose only one of: tanstack-router, tanstack-start, react-router, next, nuxt, svelte, solid",
				);
				process.exit(1);
			}
			if (nativeFrontends.length > 1) {
				consola.fatal(
					"Cannot select multiple native frameworks. Choose only one of: native-nativewind, native-unistyles",
				);
				process.exit(1);
			}
			config.frontend = validOptions;
		}
	}
	if (options.addons && options.addons.length > 0) {
		if (options.addons.includes("none")) {
			if (options.addons.length > 1) {
				consola.fatal(`Cannot combine 'none' with other addons.`);
				process.exit(1);
			}
			config.addons = [];
		} else {
			config.addons = options.addons.filter(
				(addon): addon is ProjectAddons => addon !== "none",
			);
		}
	}
	if (options.examples && options.examples.length > 0) {
		if (options.examples.includes("none")) {
			if (options.examples.length > 1) {
				consola.fatal("Cannot combine 'none' with other examples.");
				process.exit(1);
			}
			config.examples = [];
		} else {
			config.examples = options.examples.filter(
				(ex): ex is ProjectExamples => ex !== "none",
			);
			if (options.examples.includes("none") && config.backend !== "convex") {
				config.examples = [];
			}
		}
	}

	if (config.backend === "convex") {
		const incompatibleFlags: string[] = [];

		if (providedFlags.has("auth") && options.auth === true)
			incompatibleFlags.push("--auth");
		if (providedFlags.has("database") && options.database !== "none")
			incompatibleFlags.push(`--database ${options.database}`);
		if (providedFlags.has("orm") && options.orm !== "none")
			incompatibleFlags.push(`--orm ${options.orm}`);
		if (providedFlags.has("api") && options.api !== "none")
			incompatibleFlags.push(`--api ${options.api}`);
		if (providedFlags.has("runtime") && options.runtime !== "none")
			incompatibleFlags.push(`--runtime ${options.runtime}`);
		if (providedFlags.has("dbSetup") && options.dbSetup !== "none")
			incompatibleFlags.push(`--db-setup ${options.dbSetup}`);

		if (incompatibleFlags.length > 0) {
			consola.fatal(
				`The following flags are incompatible with '--backend convex': ${incompatibleFlags.join(
					", ",
				)}. Please remove them.`,
			);
			process.exit(1);
		}

		if (providedFlags.has("frontend") && options.frontend) {
			const incompatibleFrontends = options.frontend.filter(
				(f) => f === "nuxt" || f === "solid",
			);
			if (incompatibleFrontends.length > 0) {
				consola.fatal(
					`The following frontends are not compatible with '--backend convex': ${incompatibleFrontends.join(
						", ",
					)}. Please choose a different frontend or backend.`,
				);
				process.exit(1);
			}
		}

		config.auth = false;
		config.database = "none";
		config.orm = "none";
		config.api = "none";
		config.runtime = "none";
		config.dbSetup = "none";
		config.examples = ["todo"];
	} else if (config.backend === "none") {
		const incompatibleFlags: string[] = [];

		if (providedFlags.has("auth") && options.auth === true)
			incompatibleFlags.push("--auth");
		if (providedFlags.has("database") && options.database !== "none")
			incompatibleFlags.push(`--database ${options.database}`);
		if (providedFlags.has("orm") && options.orm !== "none")
			incompatibleFlags.push(`--orm ${options.orm}`);
		if (providedFlags.has("api") && options.api !== "none")
			incompatibleFlags.push(`--api ${options.api}`);
		if (providedFlags.has("runtime") && options.runtime !== "none")
			incompatibleFlags.push(`--runtime ${options.runtime}`);
		if (providedFlags.has("dbSetup") && options.dbSetup !== "none")
			incompatibleFlags.push(`--db-setup ${options.dbSetup}`);

		if (incompatibleFlags.length > 0) {
			consola.fatal(
				`The following flags are incompatible with '--backend none': ${incompatibleFlags.join(
					", ",
				)}. Please remove them.`,
			);
			process.exit(1);
		}

		config.auth = false;
		config.database = "none";
		config.orm = "none";
		config.api = "none";
		config.runtime = "none";
		config.dbSetup = "none";
		if (
			options.examples &&
			!options.examples.includes("none") &&
			options.examples.length > 0
		) {
			consola.fatal(
				"Cannot select examples when backend is 'none'. Please remove the --examples flag or set --examples none.",
			);
			process.exit(1);
		}
		config.examples = [];
		log.info(
			"Due to '--backend none', the following options have been automatically set: --auth=false, --database=none, --orm=none, --api=none, --runtime=none, --db-setup=none, --examples=none",
		);
	} else {
		const effectiveDatabase =
			config.database ?? (options.yes ? DEFAULT_CONFIG.database : undefined);
		const effectiveOrm =
			config.orm ?? (options.yes ? DEFAULT_CONFIG.orm : undefined);
		const effectiveAuth =
			config.auth ?? (options.yes ? DEFAULT_CONFIG.auth : undefined);
		const effectiveDbSetup =
			config.dbSetup ?? (options.yes ? DEFAULT_CONFIG.dbSetup : undefined);
		const effectiveExamples =
			config.examples ?? (options.yes ? DEFAULT_CONFIG.examples : undefined);
		const effectiveFrontend =
			config.frontend ?? (options.yes ? DEFAULT_CONFIG.frontend : undefined);
		const effectiveApi =
			config.api ?? (options.yes ? DEFAULT_CONFIG.api : undefined);
		const effectiveBackend =
			config.backend ?? (options.yes ? DEFAULT_CONFIG.backend : undefined);

		if (effectiveDatabase === "none") {
			if (providedFlags.has("orm") && options.orm !== "none") {
				consola.fatal(
					`Cannot use ORM '--orm ${options.orm}' when database is 'none'.`,
				);
				process.exit(1);
			}
			config.orm = "none";
			log.info(
				"Due to '--database none', '--orm' has been automatically set to 'none'.",
			);

			if (providedFlags.has("auth") && options.auth === true) {
				consola.fatal(
					"Authentication requires a database. Cannot use --auth when database is 'none'.",
				);
				process.exit(1);
			}
			config.auth = false;
			log.info(
				"Due to '--database none', '--auth' has been automatically set to 'false'.",
			);

			if (providedFlags.has("dbSetup") && options.dbSetup !== "none") {
				consola.fatal(
					`Database setup '--db-setup ${options.dbSetup}' requires a database. Cannot use when database is 'none'.`,
				);
				process.exit(1);
			}
			config.dbSetup = "none";
			log.info(
				"Due to '--database none', '--db-setup' has been automatically set to 'none'.",
			);
		}

		if (config.orm === "mongoose" && !providedFlags.has("database")) {
			if (effectiveDatabase && effectiveDatabase !== "mongodb") {
				consola.fatal(
					`Mongoose ORM requires MongoDB. Cannot use --orm mongoose with --database ${effectiveDatabase}.`,
				);
				process.exit(1);
			}
			config.database = "mongodb";
		}

		if (effectiveDatabase === "mongodb" && effectiveOrm === "drizzle") {
			consola.fatal(
				"Drizzle ORM is not compatible with MongoDB. Please use --orm prisma or --orm mongoose.",
			);
			process.exit(1);
		}

		if (
			effectiveOrm === "mongoose" &&
			effectiveDatabase &&
			effectiveDatabase !== "mongodb"
		) {
			consola.fatal(
				`Mongoose ORM requires MongoDB. Cannot use --orm mongoose with --database ${effectiveDatabase}.`,
			);
			process.exit(1);
		}

		if (config.dbSetup && config.dbSetup !== "none") {
			const dbSetup = config.dbSetup;

			if (!effectiveDatabase || effectiveDatabase === "none") {
				consola.fatal(
					`Database setup '--db-setup ${dbSetup}' requires a database. Cannot use when database is 'none'.`,
				);
				process.exit(1);
			}

			if (dbSetup === "turso") {
				if (effectiveDatabase && effectiveDatabase !== "sqlite") {
					consola.fatal(
						`Turso setup requires SQLite. Cannot use --db-setup turso with --database ${effectiveDatabase}`,
					);
					process.exit(1);
				}
				if (effectiveOrm !== "drizzle") {
					consola.fatal(
						`Turso setup requires Drizzle ORM. Cannot use --db-setup turso with --orm ${
							effectiveOrm ?? "none"
						}.`,
					);
					process.exit(1);
				}
			} else if (dbSetup === "prisma-postgres") {
				if (effectiveDatabase !== "postgres") {
					consola.fatal(
						`Prisma PostgreSQL setup requires PostgreSQL. Cannot use --db-setup prisma-postgres with --database ${effectiveDatabase}.`,
					);
					process.exit(1);
				}
				if (effectiveOrm !== "prisma") {
					consola.fatal(
						`Prisma PostgreSQL setup requires Prisma ORM. Cannot use --db-setup prisma-postgres with --orm ${effectiveOrm}.`,
					);
					process.exit(1);
				}
			} else if (dbSetup === "mongodb-atlas") {
				if (effectiveDatabase !== "mongodb") {
					consola.fatal(
						`MongoDB Atlas setup requires MongoDB. Cannot use --db-setup mongodb-atlas with --database ${effectiveDatabase}.`,
					);
					process.exit(1);
				}
				if (effectiveOrm !== "prisma" && effectiveOrm !== "mongoose") {
					consola.fatal(
						`MongoDB Atlas setup requires Prisma or Mongoose ORM. Cannot use --db-setup mongodb-atlas with --orm ${effectiveOrm}.`,
					);
					process.exit(1);
				}
			} else if (dbSetup === "neon") {
				if (effectiveDatabase !== "postgres") {
					consola.fatal(
						`Neon PostgreSQL setup requires PostgreSQL. Cannot use --db-setup neon with --database ${effectiveDatabase}.`,
					);
					process.exit(1);
				}
			}
		}

		const includesNuxt = effectiveFrontend?.includes("nuxt");
		const includesSvelte = effectiveFrontend?.includes("svelte");
		const includesSolid = effectiveFrontend?.includes("solid");

		if (
			(includesNuxt || includesSvelte || includesSolid) &&
			effectiveApi === "trpc"
		) {
			consola.fatal(
				`tRPC API is not supported with '${
					includesNuxt ? "nuxt" : includesSvelte ? "svelte" : "solid"
				}' frontend. Please use --api orpc or --api none or remove '${
					includesNuxt ? "nuxt" : includesSvelte ? "svelte" : "solid"
				}' from --frontend.`,
			);
			process.exit(1);
		}

		if (config.addons && config.addons.length > 0) {
			const webSpecificAddons = ["pwa", "tauri"];
			const hasWebSpecificAddons = config.addons.some((addon) =>
				webSpecificAddons.includes(addon),
			);
			const hasCompatibleWebFrontend = effectiveFrontend?.some((f) => {
				const isPwaCompatible =
					f === "tanstack-router" || f === "react-router" || f === "solid";
				const isTauriCompatible =
					f === "tanstack-router" ||
					f === "react-router" ||
					f === "nuxt" ||
					f === "svelte" ||
					f === "solid";

				if (
					config.addons?.includes("pwa") &&
					config.addons?.includes("tauri")
				) {
					return isPwaCompatible && isTauriCompatible;
				}
				if (config.addons?.includes("pwa")) {
					return isPwaCompatible;
				}
				if (config.addons?.includes("tauri")) {
					return isTauriCompatible;
				}
				return true;
			});

			if (hasWebSpecificAddons && !hasCompatibleWebFrontend) {
				let incompatibleReason = "Selected frontend is not compatible.";
				if (config.addons.includes("pwa")) {
					incompatibleReason =
						"PWA requires tanstack-router, react-router, or solid.";
				}
				if (config.addons.includes("tauri")) {
					incompatibleReason =
						"Tauri requires tanstack-router, react-router, nuxt, svelte, or solid.";
				}
				consola.fatal(
					`Incompatible addon/frontend combination: ${incompatibleReason}`,
				);
				process.exit(1);
			}

			if (config.addons.includes("husky") && !config.addons.includes("biome")) {
				consola.warn(
					"Husky addon is recommended to be used with Biome for lint-staged configuration.",
				);
			}
			config.addons = [...new Set(config.addons)];
		}

		const onlyNativeFrontend =
			effectiveFrontend &&
			effectiveFrontend.length === 1 &&
			(effectiveFrontend[0] === "native-nativewind" ||
				effectiveFrontend[0] === "native-unistyles");

		if (
			onlyNativeFrontend &&
			config.examples &&
			config.examples.length > 0 &&
			!config.examples.includes("none")
		) {
			consola.fatal(
				"Examples are not supported when only a native frontend (NativeWind or Unistyles) is selected.",
			);
			process.exit(1);
		}

		if (
			config.examples &&
			config.examples.length > 0 &&
			!config.examples.includes("none")
		) {
			if (
				config.examples.includes("todo") &&
				effectiveBackend !== "convex" &&
				effectiveBackend !== "none" &&
				effectiveDatabase === "none"
			) {
				consola.fatal(
					"The 'todo' example requires a database if a backend (other than Convex) is present. Cannot use --examples todo when database is 'none' and a backend is selected.",
				);
				process.exit(1);
			}

			if (config.examples.includes("ai") && effectiveBackend === "elysia") {
				consola.fatal(
					"The 'ai' example is not compatible with the Elysia backend.",
				);
				process.exit(1);
			}

			if (config.examples.includes("ai") && includesSolid) {
				consola.fatal(
					"The 'ai' example is not compatible with the Solid frontend.",
				);
				process.exit(1);
			}
		}
	}

	return config;
}

main().catch((err) => {
	consola.error("Aborting installation due to unexpected error...");
	if (err instanceof Error) {
		if (
			!err.message.includes("is only supported with") &&
			!err.message.includes("incompatible with") &&
			!err.message.includes("requires") &&
			!err.message.includes("Cannot use") &&
			!err.message.includes("Cannot select multiple") &&
			!err.message.includes("Cannot combine") &&
			!err.message.includes("not supported")
		) {
			consola.error(err.message);
			consola.error(err.stack);
		}
	} else {
		console.error(err);
	}
	process.exit(1);
});