import { describe, expect, it } from "bun:test";
import { BUILTIN_TOOLS, createTools, HIDDEN_TOOLS, type ToolSession } from "@oh-my-pi/pi-coding-agent/tools";

process.env.OMP_PYTHON_SKIP_CHECK = "1";

function createTestSession(overrides: Partial<ToolSession> = {}): ToolSession {
	return {
		cwd: "/tmp/test",
		hasUI: false,
		getSessionFile: () => null,
		getSessionSpawns: () => "*",
		...overrides,
	};
}

function createBaseSettings(overrides: Partial<NonNullable<ToolSession["settings"]>> = {}) {
	return {
		getImageAutoResize: () => true,
		getLspFormatOnWrite: () => true,
		getLspDiagnosticsOnWrite: () => true,
		getLspDiagnosticsOnEdit: () => false,
		getEditFuzzyMatch: () => true,
		getBashInterceptorEnabled: () => true,
		getBashInterceptorSimpleLsEnabled: () => true,
		getBashInterceptorRules: () => [],
		...overrides,
	};
}

describe("createTools", () => {
	it("creates all builtin tools by default", async () => {
		const session = createTestSession();
		const tools = await createTools(session);
		const names = tools.map(t => t.name);

		// Core tools should always be present
		expect(names).toContain("python");
		expect(names).not.toContain("bash");
		expect(names).toContain("calc");
		expect(names).toContain("read");
		expect(names).toContain("edit");
		expect(names).toContain("write");
		expect(names).toContain("grep");
		expect(names).toContain("find");
		expect(names).toContain("ls");
		expect(names).toContain("lsp");
		expect(names).toContain("notebook");
		expect(names).toContain("task");
		expect(names).toContain("todo_write");
		expect(names).toContain("fetch");
		expect(names).toContain("web_search");
		expect(names).toContain("exit_plan_mode");
	});

	it("includes bash and python when python mode is both", async () => {
		const session = createTestSession({
			settings: createBaseSettings({
				getPythonToolMode: () => "both",
				getPythonKernelMode: () => "session",
			}),
		});
		const tools = await createTools(session);
		const names = tools.map(t => t.name);

		expect(names).toContain("bash");
		expect(names).toContain("python");
	});

	it("includes bash only when python mode is bash-only", async () => {
		const session = createTestSession({
			settings: createBaseSettings({
				getPythonToolMode: () => "bash-only",
				getPythonKernelMode: () => "session",
			}),
		});
		const tools = await createTools(session);
		const names = tools.map(t => t.name);

		expect(names).toContain("bash");
		expect(names).not.toContain("python");
	});

	it("excludes lsp tool when session disables LSP", async () => {
		const session = createTestSession({ enableLsp: false });
		const tools = await createTools(session, ["read", "lsp", "write"]);
		const names = tools.map(t => t.name);

		expect(names).toEqual(["read", "write", "exit_plan_mode"]);
	});

	it("excludes lsp tool when disabled", async () => {
		const session = createTestSession({ enableLsp: false });
		const tools = await createTools(session);
		const names = tools.map(t => t.name);

		expect(names).not.toContain("lsp");
	});

	it("respects requested tool subset", async () => {
		const session = createTestSession();
		const tools = await createTools(session, ["read", "write"]);
		const names = tools.map(t => t.name);

		expect(names).toEqual(["read", "write", "exit_plan_mode"]);
	});

	it("includes hidden tools when explicitly requested", async () => {
		const session = createTestSession();
		const tools = await createTools(session, ["report_finding"]);
		const names = tools.map(t => t.name);

		expect(names).toEqual(["report_finding", "exit_plan_mode"]);
	});

	it("includes submit_result tool when required", async () => {
		const session = createTestSession({ requireSubmitResultTool: true });
		const tools = await createTools(session);
		const names = tools.map(t => t.name);

		expect(names).toContain("submit_result");
	});

	it("excludes ask tool when hasUI is false", async () => {
		const session = createTestSession({ hasUI: false });
		const tools = await createTools(session);
		const names = tools.map(t => t.name);

		expect(names).not.toContain("ask");
	});

	it("includes ask tool when hasUI is true", async () => {
		const session = createTestSession({ hasUI: true });
		const tools = await createTools(session);
		const names = tools.map(t => t.name);

		expect(names).toContain("ask");
	});

	it("BUILTIN_TOOLS contains all expected tools", () => {
		const expectedTools = [
			"ask",
			"bash",
			"python",
			"calc",
			"ssh",
			"edit",
			"find",
			"grep",
			"ls",
			"lsp",
			"notebook",
			"read",
			"task",
			"todo_write",
			"fetch",
			"web_search",
			"write",
		];

		for (const tool of expectedTools) {
			expect(BUILTIN_TOOLS).toHaveProperty(tool);
		}

		// Ensure we haven't missed any
		expect(Object.keys(BUILTIN_TOOLS).sort()).toEqual(expectedTools.sort());
	});

	it("HIDDEN_TOOLS contains review tools", () => {
		expect(Object.keys(HIDDEN_TOOLS).sort()).toEqual(["exit_plan_mode", "report_finding", "submit_result"]);
	});
});