import type { ExtensionAPI } from "@earendil-works/pi-coding-agent";
import assert from "node:assert/strict";
import { mkdir, mkdtemp, rm, writeFile } from "node:fs/promises";
import { homedir, tmpdir } from "node:os";
import { join, parse } from "node:path";
import test from "node:test";

import pluginInitExtension, {
	findMissingPluginInitializers,
	initializeMissingPlugins,
	validatePluginInitCwd,
} from "../extensions/plugin-init.ts";

test("initializes missing CodeGraph and Hippo state after preflighting both CLIs", async () => {
	const cwd = await mkdtemp(join(tmpdir(), "my-pi-plugin-init-"));
	const calls: Array<{ command: string; args: string[]; cwd: string }> = [];
	try {
		const targets = await findMissingPluginInitializers(cwd);
		assert.deepEqual(targets.map(({ name }) => name), ["CodeGraph", "Hippo"]);

		await initializeMissingPlugins(cwd, targets, async (command, args, options) => {
			calls.push({ command, args, cwd: options.cwd });
			return { code: 0, stdout: "ok", stderr: "" };
		});

		assert.deepEqual(calls, [
			{ command: "codegraph", args: ["--version"], cwd },
			{ command: "hippo", args: ["--version"], cwd },
			{ command: "codegraph", args: ["init", cwd], cwd },
			{ command: "hippo", args: ["init"], cwd },
		]);
	} finally {
		await rm(cwd, { recursive: true, force: true });
	}
});

test("uses the CLIs' database files as authoritative initialization markers", async () => {
	const cwd = await mkdtemp(join(tmpdir(), "my-pi-plugin-init-"));
	const calls: string[] = [];
	try {
		await mkdir(join(cwd, ".codegraph"));
		await mkdir(join(cwd, ".hippo"));
		assert.deepEqual(
			(await findMissingPluginInitializers(cwd)).map(({ name }) => name),
			["CodeGraph", "Hippo"],
			"bare state directories must not count as initialized",
		);

		await writeFile(join(cwd, ".codegraph", "codegraph.db"), "");
		assert.deepEqual((await findMissingPluginInitializers(cwd)).map(({ name }) => name), ["Hippo"]);
		await writeFile(join(cwd, ".hippo", "hippo.db"), "");
		const targets = await findMissingPluginInitializers(cwd);
		assert.deepEqual(targets, []);

		await initializeMissingPlugins(cwd, targets, async (command, args) => {
			calls.push(`${command} ${args.join(" ")}`);
			return { code: 0, stdout: "ok", stderr: "" };
		});
		assert.deepEqual(calls, ["codegraph --version", "hippo --version"]);
	} finally {
		await rm(cwd, { recursive: true, force: true });
	}
});

test("rejects unsafe project roots", () => {
	assert.throws(() => validatePluginInitCwd(parse(homedir()).root), /文件系统根目录/);
	assert.throws(() => validatePluginInitCwd(homedir()), /用户主目录/);
});

test("preflights both CLIs before creating project state", async () => {
	const cwd = await mkdtemp(join(tmpdir(), "my-pi-plugin-init-"));
	const calls: string[] = [];
	try {
		const targets = await findMissingPluginInitializers(cwd);
		await assert.rejects(
			initializeMissingPlugins(cwd, targets, async (command, args) => {
				calls.push(`${command} ${args.join(" ")}`);
				return command === "hippo"
					? { code: 1, stdout: "", stderr: "not installed" }
					: { code: 0, stdout: "ok", stderr: "" };
			}),
			/Hippo 检测失败：not installed/,
		);
		assert.deepEqual(calls, ["codegraph --version", "hippo --version"]);
	} finally {
		await rm(cwd, { recursive: true, force: true });
	}
});

test("plugin_init confirms the target and hot-reloads after initialization", async () => {
	let command: { handler: (args: string, ctx: any) => Promise<void> } | undefined;
	const calls: string[] = [];
	const pi = {
		registerCommand(name: string, definition: typeof command) {
			assert.equal(name, "plugin_init");
			command = definition;
		},
		exec: async (program: string, args: string[]) => {
			calls.push(`${program} ${args.join(" ")}`);
			return { code: 0, stdout: "ok", stderr: "" };
		},
	} as unknown as ExtensionAPI;
	pluginInitExtension(pi);
	assert.ok(command);
	const registeredCommand = command!;

	const cwd = await mkdtemp(join(tmpdir(), "my-pi-plugin-init-"));
	let reloaded = false;
	let confirmation = "";
	try {
		await registeredCommand.handler("", {
			cwd,
			hasUI: true,
			ui: {
				confirm: async (_title: string, message: string) => {
					confirmation = message;
					return true;
				},
				notify() {},
			},
			reload: async () => {
				reloaded = true;
			},
		});
		assert.match(confirmation, new RegExp(cwd.replace(/[.*+?^${}()|[\]\\]/g, "\\$&")));
		assert.deepEqual(calls, [
			"codegraph --version",
			"hippo --version",
			`codegraph init ${cwd}`,
			"hippo init",
		]);
		assert.equal(reloaded, true);
	} finally {
		await rm(cwd, { recursive: true, force: true });
	}
});

test("plugin_init reports retained partial state and does not reload when a later initializer fails", async () => {
	let command: { handler: (args: string, ctx: any) => Promise<void> } | undefined;
	const pi = {
		registerCommand(_name: string, definition: typeof command) {
			command = definition;
		},
		exec: async (program: string, args: string[]) => ({
			code: program === "hippo" && args[0] === "init" ? 1 : 0,
			stdout: "",
			stderr: "mock failure",
		}),
	} as unknown as ExtensionAPI;
	pluginInitExtension(pi);
	assert.ok(command);
	const registeredCommand = command!;

	const cwd = await mkdtemp(join(tmpdir(), "my-pi-plugin-init-"));
	let reloaded = false;
	let error = "";
	try {
		await registeredCommand.handler("", {
			cwd,
			hasUI: true,
			ui: {
				confirm: async () => true,
				notify(message: string, level: string) {
					if (level === "error") error = message;
				},
			},
			reload: async () => {
				reloaded = true;
			},
		});
		assert.match(error, /Hippo 初始化失败：mock failure/);
		assert.match(error, /已完成的 CodeGraph 初始化会保留，不会自动回滚/);
		assert.equal(reloaded, false);
	} finally {
		await rm(cwd, { recursive: true, force: true });
	}
});

test("plugin_init stops without executing or reloading when confirmation is cancelled", async () => {
	let command: { handler: (args: string, ctx: any) => Promise<void> } | undefined;
	let executed = false;
	const pi = {
		registerCommand(_name: string, definition: typeof command) {
			command = definition;
		},
		exec: async () => {
			executed = true;
			return { code: 0, stdout: "", stderr: "" };
		},
	} as unknown as ExtensionAPI;
	pluginInitExtension(pi);
	const registeredCommand = command!;

	const cwd = await mkdtemp(join(tmpdir(), "my-pi-plugin-init-"));
	let reloaded = false;
	try {
		await registeredCommand.handler("", {
			cwd,
			hasUI: true,
			ui: { confirm: async () => false, notify() {} },
			reload: async () => {
				reloaded = true;
			},
		});
		assert.equal(executed, false);
		assert.equal(reloaded, false);
	} finally {
		await rm(cwd, { recursive: true, force: true });
	}
});