import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import { mkdtempSync, rmSync, readFileSync, writeFileSync, existsSync } from "node:fs";
import { join } from "node:path";
import { tmpdir } from "node:os";

import {
  ADAPTERS,
  knownAgents,
  resolveAdapter,
} from "../src/cli/connect/index.js";
import type { ConnectAdapter } from "../src/cli/connect/types.js";

const EXPECTED_COPILOT_MCP_COMMAND =
  process.platform === "win32"
    ? {
        command: process.env["ComSpec"] || process.env["COMSPEC"] || "cmd.exe",
        args: ["/d", "/s", "/c", "npx", "-y", "@agentmemory/mcp"],
      }
    : {
        command: "npx",
        args: ["-y", "@agentmemory/mcp"],
      };

describe("agentmemory connect — dispatcher", () => {
  it("resolves every known agent by lowercase name", () => {
    for (const name of knownAgents()) {
      const a = resolveAdapter(name);
      expect(a, `expected adapter for ${name}`).not.toBeNull();
      expect(a!.name).toBe(name);
    }
  });

  it("resolves case-insensitively", () => {
    expect(resolveAdapter("Claude-Code")?.name).toBe("claude-code");
    expect(resolveAdapter("CURSOR")?.name).toBe("cursor");
  });

  it("returns null for unknown agents", () => {
    expect(resolveAdapter("nonexistent-agent")).toBeNull();
    expect(resolveAdapter("")).toBeNull();
  });

  it("ships the supported agent list", () => {
    expect(knownAgents().sort()).toEqual(
      [
        "antigravity",
        "claude-code",
        "cline",
        "copilot-cli",
        "codex",
        "continue",
        "cursor",
        "droid",
        "gemini-cli",
        "hermes",
        "kiro",
        "opencode",
        "openclaw",
        "openhuman",
        "pi",
        "qwen",
        "warp",
        "zed",
      ].sort(),
    );
    expect(ADAPTERS.length).toBe(18);
  });

  it("every adapter exposes detect() and install()", () => {
    for (const a of ADAPTERS) {
      expect(typeof a.detect).toBe("function");
      expect(typeof a.install).toBe("function");
      expect(typeof a.name).toBe("string");
      expect(typeof a.displayName).toBe("string");
    }
  });

  it("every adapter declares a category so onboarding never needs a separate list (#872)", () => {
    for (const a of ADAPTERS) {
      expect(
        ["native", "mcp"].includes(a.category as string),
        `adapter ${a.name} must set category to "native" or "mcp"`,
      ).toBe(true);
    }
  });
});

describe("agentmemory connect — claude-code adapter (mock filesystem)", () => {
  let tmpHome: string;
  let originalHome: string | undefined;
  let originalUserprofile: string | undefined;

  beforeEach(() => {
    tmpHome = mkdtempSync(join(tmpdir(), "am-connect-"));
    originalHome = process.env["HOME"];
    originalUserprofile = process.env["USERPROFILE"];
    process.env["HOME"] = tmpHome;
    process.env["USERPROFILE"] = tmpHome;
    vi.resetModules();
  });

  afterEach(() => {
    if (originalHome !== undefined) process.env["HOME"] = originalHome;
    else delete process.env["HOME"];
    if (originalUserprofile !== undefined)
      process.env["USERPROFILE"] = originalUserprofile;
    else delete process.env["USERPROFILE"];
    rmSync(tmpHome, { recursive: true, force: true });
    vi.resetModules();
  });

  async function loadAdapter(): Promise<ConnectAdapter> {
    const mod = await import("../src/cli/connect/claude-code.js?t=" + Date.now());
    return (mod as { adapter: ConnectAdapter }).adapter;
  }

  it("detect() returns false when ~/.claude doesn't exist", async () => {
    const a = await loadAdapter();
    expect(a.detect()).toBe(false);
  });

  it("install() writes mcpServers.agentmemory into ~/.claude.json and is idempotent", async () => {
    const claudeDir = join(tmpHome, ".claude");
    require("node:fs").mkdirSync(claudeDir, { recursive: true });
    writeFileSync(
      join(tmpHome, ".claude.json"),
      JSON.stringify({ mcpServers: { other: { command: "x" } } }),
    );

    const a = await loadAdapter();
    expect(a.detect()).toBe(true);

    const first = await a.install({ dryRun: false, force: false });
    expect(first.kind).toBe("installed");

    const config = JSON.parse(readFileSync(join(tmpHome, ".claude.json"), "utf-8"));
    expect(config.mcpServers.agentmemory.command).toBe("npx");
    expect(config.mcpServers.agentmemory.args).toContain("@agentmemory/mcp");
    expect(config.mcpServers.other.command).toBe("x");

    const second = await a.install({ dryRun: false, force: false });
    expect(second.kind).toBe("already-wired");
  });

  it("install() writes env passthrough block for AGENTMEMORY_URL + AGENTMEMORY_SECRET (#375)", async () => {
    // Remote deployments (k8s, reverse proxy) set AGENTMEMORY_URL +
    // AGENTMEMORY_SECRET in the shell. The wired MCP entry must honour
    // those via ${VAR} expansion so a single entry covers both local
    // and remote without the user needing to add a duplicate config
    // that triggers a /doctor duplicate-server warning.
    const claudeDir = join(tmpHome, ".claude");
    require("node:fs").mkdirSync(claudeDir, { recursive: true });
    writeFileSync(join(tmpHome, ".claude.json"), JSON.stringify({}));

    const a = await loadAdapter();
    const result = await a.install({ dryRun: false, force: false });
    expect(result.kind).toBe("installed");

    const config = JSON.parse(readFileSync(join(tmpHome, ".claude.json"), "utf-8"));
    const entry = config.mcpServers.agentmemory;
    expect(entry.env).toBeDefined();
    // env interpolation must carry a default so Claude Code
    // doesn't silently drop the server when the user hasn't exported
    // AGENTMEMORY_URL / AGENTMEMORY_SECRET. Defaults match the
    // documented runtime (localhost:3111, no auth, all tools).
    expect(entry.env.AGENTMEMORY_URL).toBe(
      "${AGENTMEMORY_URL:-http://localhost:3111}",
    );
    expect(entry.env.AGENTMEMORY_SECRET).toBe("${AGENTMEMORY_SECRET:-}");
    expect(entry.env.AGENTMEMORY_TOOLS).toBe("${AGENTMEMORY_TOOLS:-all}");
  });

  it("install() with --force re-writes even when already wired", async () => {
    require("node:fs").mkdirSync(join(tmpHome, ".claude"), { recursive: true });
    writeFileSync(
      join(tmpHome, ".claude.json"),
      JSON.stringify({
        mcpServers: {
          agentmemory: { command: "npx", args: ["-y", "@agentmemory/mcp"] },
        },
      }),
    );

    const a = await loadAdapter();
    const result = await a.install({ dryRun: false, force: true });
    expect(result.kind).toBe("installed");
  });

  it("install() with --dry-run does not mutate the file", async () => {
    require("node:fs").mkdirSync(join(tmpHome, ".claude"), { recursive: true });
    const before = JSON.stringify({ mcpServers: {} });
    writeFileSync(join(tmpHome, ".claude.json"), before);

    const a = await loadAdapter();
    const result = await a.install({ dryRun: true, force: false });
    expect(result.kind).toBe("installed");

    const after = readFileSync(join(tmpHome, ".claude.json"), "utf-8");
    expect(after).toBe(before);
  });

  it("install() creates a backup file under ~/.agentmemory/backups/", async () => {
    require("node:fs").mkdirSync(join(tmpHome, ".claude"), { recursive: true });
    writeFileSync(
      join(tmpHome, ".claude.json"),
      JSON.stringify({ mcpServers: {} }),
    );

    const a = await loadAdapter();
    const result = await a.install({ dryRun: false, force: false });
    expect(result.kind).toBe("installed");
    if (result.kind === "installed") {
      expect(result.backupPath).toBeDefined();
      expect(existsSync(result.backupPath!)).toBe(true);
      expect(result.backupPath!).toContain(join(".agentmemory", "backups"));
    }
  });
});

describe("agentmemory connect — opencode adapter (#872)", () => {
  let tmpHome: string;
  let originalHome: string | undefined;
  let originalUserprofile: string | undefined;

  beforeEach(() => {
    tmpHome = mkdtempSync(join(tmpdir(), "am-opencode-"));
    originalHome = process.env["HOME"];
    originalUserprofile = process.env["USERPROFILE"];
    process.env["HOME"] = tmpHome;
    process.env["USERPROFILE"] = tmpHome;
    vi.resetModules();
  });

  afterEach(() => {
    if (originalHome !== undefined) process.env["HOME"] = originalHome;
    else delete process.env["HOME"];
    if (originalUserprofile !== undefined)
      process.env["USERPROFILE"] = originalUserprofile;
    else delete process.env["USERPROFILE"];
    rmSync(tmpHome, { recursive: true, force: true });
    vi.resetModules();
  });

  const cfgPath = () =>
    join(tmpHome, ".config", "opencode", "opencode.json");

  async function loadOpencode(): Promise<ConnectAdapter> {
    const mod = await import("../src/cli/connect/opencode.js?t=" + Date.now());
    return (mod as { adapter: ConnectAdapter }).adapter;
  }

  it("writes the opencode `mcp` schema (command as array) and preserves other servers", async () => {
    require("node:fs").mkdirSync(join(tmpHome, ".config", "opencode"), {
      recursive: true,
    });
    writeFileSync(
      cfgPath(),
      JSON.stringify({ mcp: { other: { type: "local", command: ["x"] } } }),
    );

    const a = await loadOpencode();
    expect(a.name).toBe("opencode");
    expect(a.detect()).toBe(true);

    const first = await a.install({ dryRun: false, force: false });
    expect(first.kind).toBe("installed");

    const config = JSON.parse(readFileSync(cfgPath(), "utf-8"));
    const entry = config.mcp.agentmemory;
    expect(entry.type).toBe("local");
    expect(Array.isArray(entry.command)).toBe(true);
    expect(entry.command).toContain("@agentmemory/mcp");
    expect(entry.enabled).toBe(true);
    expect(config.mcp.other.command).toEqual(["x"]);

    const second = await a.install({ dryRun: false, force: false });
    expect(second.kind).toBe("already-wired");
  });

  it("dry-run does not mutate the file", async () => {
    require("node:fs").mkdirSync(join(tmpHome, ".config", "opencode"), {
      recursive: true,
    });
    const before = JSON.stringify({ mcp: {} });
    writeFileSync(cfgPath(), before);

    const a = await loadOpencode();
    const result = await a.install({ dryRun: true, force: false });
    expect(result.kind).toBe("installed");
    expect(readFileSync(cfgPath(), "utf-8")).toBe(before);
  });
});

describe("agentmemory connect — copilot-cli adapter (mock filesystem)", () => {
  let tmpHome: string;
  let originalHome: string | undefined;
  let originalUserprofile: string | undefined;
  let originalCopilotHome: string | undefined;
  let importCounter = 0;

  beforeEach(() => {
    tmpHome = mkdtempSync(join(tmpdir(), "am-connect-"));
    originalHome = process.env["HOME"];
    originalUserprofile = process.env["USERPROFILE"];
    originalCopilotHome = process.env["COPILOT_HOME"];
    process.env["HOME"] = tmpHome;
    process.env["USERPROFILE"] = tmpHome;
    delete process.env["COPILOT_HOME"];
    vi.resetModules();
  });

  afterEach(() => {
    if (originalHome !== undefined) process.env["HOME"] = originalHome;
    else delete process.env["HOME"];
    if (originalUserprofile !== undefined)
      process.env["USERPROFILE"] = originalUserprofile;
    else delete process.env["USERPROFILE"];
    if (originalCopilotHome !== undefined)
      process.env["COPILOT_HOME"] = originalCopilotHome;
    else delete process.env["COPILOT_HOME"];
    rmSync(tmpHome, { recursive: true, force: true });
    vi.resetModules();
  });

  async function loadAdapter(): Promise<ConnectAdapter> {
    const mod = await import(
      "../src/cli/connect/copilot-cli.js?t=" + Date.now() + "-" + importCounter++
    );
    return (mod as { adapter: ConnectAdapter }).adapter;
  }

  it("detect() returns false when ~/.copilot doesn't exist", async () => {
    const a = await loadAdapter();
    expect(a.detect()).toBe(false);
  });

  it("install() writes mcpServers.agentmemory into ~/.copilot/mcp-config.json and is idempotent", async () => {
    require("node:fs").mkdirSync(join(tmpHome, ".copilot"), { recursive: true });

    const a = await loadAdapter();
    expect(a.detect()).toBe(true);

    const first = await a.install({ dryRun: false, force: false });
    expect(first.kind).toBe("installed");

    const config = JSON.parse(
      readFileSync(join(tmpHome, ".copilot", "mcp-config.json"), "utf-8"),
    );
    expect(config.mcpServers.agentmemory).toEqual({
      type: "local",
      ...EXPECTED_COPILOT_MCP_COMMAND,
      env: {
        AGENTMEMORY_URL: "${AGENTMEMORY_URL:-http://localhost:3111}",
        AGENTMEMORY_SECRET: "${AGENTMEMORY_SECRET:-}",
        AGENTMEMORY_TOOLS: "${AGENTMEMORY_TOOLS:-all}",
      },
      tools: ["*"],
    });

    const second = await a.install({ dryRun: false, force: false });
    expect(second.kind).toBe("already-wired");
  });

  it("honors COPILOT_HOME when locating mcp-config.json", async () => {
    const customCopilotHome = join(tmpHome, "custom-copilot-home");
    process.env["COPILOT_HOME"] = customCopilotHome;
    require("node:fs").mkdirSync(customCopilotHome, { recursive: true });

    const a = await loadAdapter();
    expect(a.detect()).toBe(true);

    const result = await a.install({ dryRun: false, force: false });
    expect(result.kind).toBe("installed");
    expect(result.mutatedPath).toBe(join(customCopilotHome, "mcp-config.json"));
    expect(existsSync(join(customCopilotHome, "mcp-config.json"))).toBe(true);
    expect(existsSync(join(tmpHome, ".copilot", "mcp-config.json"))).toBe(false);
  });

  it("install() preserves unrelated top-level keys and mcpServers entries", async () => {
    require("node:fs").mkdirSync(join(tmpHome, ".copilot"), { recursive: true });
    writeFileSync(
      join(tmpHome, ".copilot", "mcp-config.json"),
      JSON.stringify({
        otherTopLevel: { keep: true },
        mcpServers: { other: { type: "local", command: "other" } },
      }),
    );

    const a = await loadAdapter();
    const result = await a.install({ dryRun: false, force: false });
    expect(result.kind).toBe("installed");

    const config = JSON.parse(
      readFileSync(join(tmpHome, ".copilot", "mcp-config.json"), "utf-8"),
    );
    expect(config.otherTopLevel).toEqual({ keep: true });
    expect(config.mcpServers.other).toEqual({ type: "local", command: "other" });
    expect(config.mcpServers.agentmemory.command).toBe(
      EXPECTED_COPILOT_MCP_COMMAND.command,
    );
  });

  it("install() writes env passthrough block for AGENTMEMORY_URL + AGENTMEMORY_SECRET", async () => {
    require("node:fs").mkdirSync(join(tmpHome, ".copilot"), { recursive: true });

    const a = await loadAdapter();
    const result = await a.install({ dryRun: false, force: false });
    expect(result.kind).toBe("installed");

    const config = JSON.parse(
      readFileSync(join(tmpHome, ".copilot", "mcp-config.json"), "utf-8"),
    );
    const entry = config.mcpServers.agentmemory;
    expect(entry.env.AGENTMEMORY_URL).toBe(
      "${AGENTMEMORY_URL:-http://localhost:3111}",
    );
    expect(entry.env.AGENTMEMORY_SECRET).toBe("${AGENTMEMORY_SECRET:-}");
    expect(entry.env.AGENTMEMORY_TOOLS).toBe("${AGENTMEMORY_TOOLS:-all}");
  });

  it("install() with --force rewrites even when already wired", async () => {
    require("node:fs").mkdirSync(join(tmpHome, ".copilot"), { recursive: true });
    writeFileSync(
      join(tmpHome, ".copilot", "mcp-config.json"),
      JSON.stringify({
        mcpServers: {
          agentmemory: {
            type: "local",
            ...EXPECTED_COPILOT_MCP_COMMAND,
            env: {
              AGENTMEMORY_URL: "${AGENTMEMORY_URL:-http://localhost:3111}",
              AGENTMEMORY_SECRET: "${AGENTMEMORY_SECRET:-}",
              AGENTMEMORY_TOOLS: "${AGENTMEMORY_TOOLS:-all}",
            },
            tools: ["memory_save"],
          },
        },
      }),
    );

    const a = await loadAdapter();
    const result = await a.install({ dryRun: false, force: true });
    expect(result.kind).toBe("installed");

    const config = JSON.parse(
      readFileSync(join(tmpHome, ".copilot", "mcp-config.json"), "utf-8"),
    );
    expect(config.mcpServers.agentmemory.tools).toEqual(["*"]);
  });

  it("install() with --dry-run does not mutate the file", async () => {
    require("node:fs").mkdirSync(join(tmpHome, ".copilot"), { recursive: true });
    const before = JSON.stringify({ mcpServers: {} });
    writeFileSync(join(tmpHome, ".copilot", "mcp-config.json"), before);

    const a = await loadAdapter();
    const result = await a.install({ dryRun: true, force: false });
    expect(result.kind).toBe("installed");

    const after = readFileSync(
      join(tmpHome, ".copilot", "mcp-config.json"),
      "utf-8",
    );
    expect(after).toBe(before);
  });

  it("install() creates a backup file when config pre-exists", async () => {
    require("node:fs").mkdirSync(join(tmpHome, ".copilot"), { recursive: true });
    writeFileSync(
      join(tmpHome, ".copilot", "mcp-config.json"),
      JSON.stringify({ mcpServers: {} }),
    );

    const a = await loadAdapter();
    const result = await a.install({ dryRun: false, force: false });
    expect(result.kind).toBe("installed");
    if (result.kind === "installed") {
      expect(result.backupPath).toBeDefined();
      expect(existsSync(result.backupPath!)).toBe(true);
      expect(result.backupPath!).toContain(join(".agentmemory", "backups"));
    }
  });
});

describe("agentmemory connect — stub adapters log + return stub", () => {
  it("hermes adapter returns stub regardless of detect", async () => {
    const { adapter } = await import("../src/cli/connect/hermes.js");
    const result = await adapter.install({ dryRun: false, force: false });
    expect(result.kind).toBe("stub");
  });

  it("openhuman adapter returns stub", async () => {
    const { adapter } = await import("../src/cli/connect/openhuman.js");
    const result = await adapter.install({ dryRun: false, force: false });
    expect(result.kind).toBe("stub");
  });

  it("pi adapter returns stub", async () => {
    const { adapter } = await import("../src/cli/connect/pi.js");
    const result = await adapter.install({ dryRun: false, force: false });
    expect(result.kind).toBe("stub");
  });
});