import { describe, it, beforeEach, afterEach, mock } from "node:test";
import assert from "node:assert";
import { tmpdir } from "node:os";
import fs from "node:fs";
import path from "path";
import { knownAikidoTools } from "../helpers.js";

describe("Bash shell integration", () => {
  let mockStartupFile;
  let bash;
  let windowsCygwinPath = "";
  let platform = "linux";

  beforeEach(async () => {
    // Create temporary startup file for testing
    mockStartupFile = path.join(tmpdir(), `test-bashrc-${Date.now()}`);

    // Mock the helpers module
    mock.module("../helpers.js", {
      namedExports: {
        doesExecutableExistOnSystem: () => true,
        addLineToFile: (filePath, line) => {
          if (!fs.existsSync(filePath)) {
            fs.writeFileSync(filePath, "", "utf-8");
          }
          fs.appendFileSync(filePath, line + "\n", "utf-8");
        },
        removeLinesMatchingPattern: (filePath, pattern) => {
          if (!fs.existsSync(filePath)) return;
          const content = fs.readFileSync(filePath, "utf-8");
          const lines = content.split("\n");
          const filteredLines = lines.filter((line) => !pattern.test(line));
          fs.writeFileSync(filePath, filteredLines.join("\n"), "utf-8");
        },
      },
    });

    // Mock child_process execSync
    mock.module("child_process", {
      namedExports: {
        execSync: () => mockStartupFile,
        spawnSync: (command, args) => {
          if (platform !== "win32") {
            return { status: 0 };
          }

          if (command === "where" && args[0] === "cygpath") {
            return {
              status: 0,
              stdout: Buffer.from("C:\\cygwin64\\bin\\cygpath.exe\n"),
            };
          }

          if (
            command === "cygpath" &&
            args[0] === "-w" &&
            args[1] === mockStartupFile
          ) {
            return {
              status: 0,
              stdout: windowsCygwinPath + "\n",
            };
          }
        },
      },
    });

    mock.module("os", {
      namedExports: {
        platform: () => platform,
      },
    });

    // Import bash module after mocking
    bash = (await import("./bash.js")).default;
  });

  afterEach(() => {
    // Clean up test files
    if (fs.existsSync(mockStartupFile)) {
      fs.unlinkSync(mockStartupFile);
    }
    if (windowsCygwinPath && fs.existsSync(windowsCygwinPath)) {
      fs.unlinkSync(windowsCygwinPath);
      windowsCygwinPath = "";
    }

    // Reset mocks
    mock.reset();
    platform = "linux";
  });

  describe("isInstalled", () => {
    it("should return true when bash is installed", () => {
      assert.strictEqual(bash.isInstalled(), true);
    });

    it("should call doesExecutableExistOnSystem with correct parameter", () => {
      // Test that the method calls the helper with the right executable name
      assert.strictEqual(bash.isInstalled(), true);
    });
  });

  describe("setup", () => {
    it("should add source line for bash initialization script", () => {
      const result = bash.setup();
      assert.strictEqual(result, true);

      const content = fs.readFileSync(mockStartupFile, "utf-8");
      assert.ok(
        content.includes(
          "source ~/.safe-chain/scripts/init-posix.sh # Safe-chain bash initialization script"
        )
      );
    });

    it("should use the correct startup file for cygwin bash on Windows", () => {
      platform = "win32";
      // set windows path to the correct filename
      windowsCygwinPath = mockStartupFile;
      mockStartupFile = "DUMMY"; // This will be overridden by the mocked execSync

      const result = bash.setup();
      assert.strictEqual(result, true);

      const content = fs.readFileSync(windowsCygwinPath, "utf-8");
      assert.ok(
        content.includes(
          "source ~/.safe-chain/scripts/init-posix.sh # Safe-chain bash initialization script"
        )
      );
    });
  });

  describe("teardown", () => {
    it("should remove npm, npx, and yarn aliases", () => {
      const initialContent = [
        "#!/bin/bash",
        "alias npm='aikido-npm'",
        "alias npx='aikido-npx'",
        "alias yarn='aikido-yarn'",
        "alias ls='ls --color=auto'",
        "alias grep='grep --color=auto'",
      ].join("\n");

      fs.writeFileSync(mockStartupFile, initialContent, "utf-8");

      const result = bash.teardown(knownAikidoTools);
      assert.strictEqual(result, true);

      const content = fs.readFileSync(mockStartupFile, "utf-8");
      assert.ok(!content.includes("alias npm="));
      assert.ok(!content.includes("alias npx="));
      assert.ok(!content.includes("alias yarn="));
      assert.ok(content.includes("alias ls="));
      assert.ok(content.includes("alias grep="));
    });

    it("should handle file that doesn't exist", () => {
      if (fs.existsSync(mockStartupFile)) {
        fs.unlinkSync(mockStartupFile);
      }

      const result = bash.teardown(knownAikidoTools);
      assert.strictEqual(result, true);
    });

    it("should handle file with no relevant aliases", () => {
      const initialContent = [
        "#!/bin/bash",
        "alias ls='ls --color=auto'",
        "export PATH=$PATH:~/bin",
      ].join("\n");

      fs.writeFileSync(mockStartupFile, initialContent, "utf-8");

      const result = bash.teardown(knownAikidoTools);
      assert.strictEqual(result, true);

      const content = fs.readFileSync(mockStartupFile, "utf-8");
      assert.ok(content.includes("alias ls="));
      assert.ok(content.includes("export PATH="));
    });
  });

  describe("shell properties", () => {
    it("should have correct name", () => {
      assert.strictEqual(bash.name, "Bash");
    });

    it("should expose all required methods", () => {
      assert.ok(typeof bash.isInstalled === "function");
      assert.ok(typeof bash.setup === "function");
      assert.ok(typeof bash.teardown === "function");
      assert.ok(typeof bash.name === "string");
    });
  });

  describe("integration tests", () => {
    it("should handle complete setup and teardown cycle", () => {
      const tools = [
        { tool: "npm", aikidoCommand: "aikido-npm" },
        { tool: "yarn", aikidoCommand: "aikido-yarn" },
      ];

      // Setup
      bash.setup(tools);
      let content = fs.readFileSync(mockStartupFile, "utf-8");
      assert.ok(content.includes("source ~/.safe-chain/scripts/init-posix.sh"));

      // Teardown
      bash.teardown(tools);
      content = fs.readFileSync(mockStartupFile, "utf-8");
      assert.ok(
        !content.includes("source ~/.safe-chain/scripts/init-posix.sh")
      );
    });

    it("should handle multiple setup calls", () => {
      const tools = [{ tool: "npm", aikidoCommand: "aikido-npm" }];

      bash.setup(tools);
      bash.teardown(tools);
      bash.setup(tools);

      const content = fs.readFileSync(mockStartupFile, "utf-8");
      const sourceMatches = (content.match(/source.*init-posix\.sh/g) || [])
        .length;
      assert.strictEqual(sourceMatches, 1, "Should not duplicate source lines");
    });

    it("should handle mixed content with aliases and source lines", () => {
      const initialContent = [
        "#!/bin/bash",
        "alias npm='old-npm'",
        "source ~/.safe-chain/scripts/init-posix.sh",
        "alias ls='ls --color=auto'",
      ].join("\n");

      fs.writeFileSync(mockStartupFile, initialContent, "utf-8");

      // Teardown should remove both aliases and source line
      bash.teardown(knownAikidoTools);
      const content = fs.readFileSync(mockStartupFile, "utf-8");
      assert.ok(!content.includes("alias npm="));
      assert.ok(
        !content.includes("source ~/.safe-chain/scripts/init-posix.sh")
      );
      assert.ok(content.includes("alias ls="));
    });
  });
});