/**
 * PermissionModal Component Tests
 *
 * Tests the pure helper functions used by the PermissionModal component.
 *
 * What this component does:
 * - Displays pending permission requests from Claude Code
 * - Allows the user to approve or dismiss permission requests
 * - On approval, reconnects Claude with the newly granted tools merged with
 *   `auto_granted_tools` from config (bug fix: issue #198)
 * - Restores conversation context after reconnecting
 *
 * Manual testing checklist:
 * - [ ] Permission modal appears when Claude requests a tool not in allowed_tools
 * - [ ] All permissions are pre-selected by default when modal opens
 * - [ ] "Select All" and "Select None" buttons work correctly
 * - [ ] "Already Granted" badge appears for tools already in the session grant list
 * - [ ] Approving permissions reconnects Claude and restores conversation context
 * - [ ] After reconnecting, auto_granted_tools are still respected (no re-prompting)
 * - [ ] Dismissing the modal clears pending permissions without reconnecting
 * - [ ] Enter key approves selected permissions
 * - [ ] Escape key dismisses the modal
 * - [ ] Character enters "permission" state when modal appears
 * - [ ] Input details are shown in a collapsible "View details" section
 *
 * Note: The `handleApproveAndReconnect` function cannot be unit tested here
 * because it depends on Tauri IPC calls (`invoke("stop_claude")`,
 * `invoke("start_claude")`, `invoke("send_prompt")`). The critical bug fix
 * (including `auto_granted_tools` in the reconnect's `allowed_tools`) is
 * covered by the `buildAllowedToolsList` tests below, which replicate the
 * exact merging logic from the component.
 */

import { describe, it, expect } from "vitest";

/**
 * Replicates the allowed-tools merging logic from PermissionModal's
 * handleApproveAndReconnect. This is the fix for issue #198: previously,
 * `auto_granted_tools` were not included when reconnecting, causing them to
 * be silently dropped and prompting the user again on subsequent requests.
 */
function buildAllowedToolsList(
  sessionGrantedTools: string[],
  newlyGrantedTools: string[],
  autoGrantedTools: string[]
): string[] {
  return [...new Set([...sessionGrantedTools, ...newlyGrantedTools, ...autoGrantedTools])];
}

/**
 * Replicates the formatInput helper from PermissionModal, used to display
 * the tool input JSON in the permission details section.
 */
function formatInput(input: Record<string, unknown>): string {
  try {
    return JSON.stringify(input, null, 2);
  } catch {
    return String(input);
  }
}

/**
 * Replicates the isToolAlreadyGranted helper from PermissionModal.
 */
function isToolAlreadyGranted(toolName: string, grantedToolsList: string[]): boolean {
  return grantedToolsList.includes(toolName);
}

// ---

describe("buildAllowedToolsList", () => {
  it("merges session-granted, newly-granted, and auto-granted tools", () => {
    const result = buildAllowedToolsList(["Bash"], ["Glob"], ["Read"]);
    expect(result).toContain("Bash");
    expect(result).toContain("Glob");
    expect(result).toContain("Read");
  });

  it("deduplicates tools that appear in multiple lists", () => {
    const result = buildAllowedToolsList(["Read", "Bash"], ["Read"], ["Read", "Write"]);
    const readCount = result.filter((t) => t === "Read").length;
    expect(readCount).toBe(1);
  });

  it("preserves auto_granted_tools even when session list is empty", () => {
    const result = buildAllowedToolsList([], ["Bash"], ["Read", "Glob"]);
    expect(result).toContain("Read");
    expect(result).toContain("Glob");
    expect(result).toContain("Bash");
  });

  it("returns only auto_granted_tools when no other grants exist", () => {
    const result = buildAllowedToolsList([], [], ["Read"]);
    expect(result).toEqual(["Read"]);
  });

  it("returns an empty array when all lists are empty", () => {
    const result = buildAllowedToolsList([], [], []);
    expect(result).toEqual([]);
  });

  it("reproduces the bug scenario from issue #198", () => {
    // Scenario: user has Read in auto_granted_tools.
    // Session starts correctly with Read allowed.
    // User approves Bash via permission modal.
    // Before fix: reconnect only passed [Bash], dropping Read.
    // After fix: reconnect passes [Bash, Read].
    const sessionGrantedTools: string[] = []; // no prior session grants
    const newlyGrantedTools = ["Bash"]; // just approved via modal
    const autoGrantedTools = ["Read"]; // configured default

    const result = buildAllowedToolsList(sessionGrantedTools, newlyGrantedTools, autoGrantedTools);

    expect(result).toContain("Bash");
    expect(result).toContain("Read"); // Must be present — this was the bug!
  });
});

describe("formatInput", () => {
  it("formats a simple object as pretty-printed JSON", () => {
    const result = formatInput({ file_path: "/home/naomi/test.ts" });
    expect(result).toBe(JSON.stringify({ file_path: "/home/naomi/test.ts" }, null, 2));
  });

  it("formats a nested object correctly", () => {
    const input = { command: "ls", args: ["-la", "/home"] };
    const result = formatInput(input);
    expect(result).toContain('"command": "ls"');
    expect(result).toContain('"args"');
  });

  it("formats an empty object as '{}'", () => {
    const result = formatInput({});
    expect(result).toBe("{}");
  });
});

describe("isToolAlreadyGranted", () => {
  it("returns true when the tool is in the granted list", () => {
    expect(isToolAlreadyGranted("Read", ["Read", "Bash"])).toBe(true);
  });

  it("returns false when the tool is not in the granted list", () => {
    expect(isToolAlreadyGranted("Write", ["Read", "Bash"])).toBe(false);
  });

  it("returns false for an empty granted list", () => {
    expect(isToolAlreadyGranted("Read", [])).toBe(false);
  });

  it("is case-sensitive", () => {
    expect(isToolAlreadyGranted("read", ["Read"])).toBe(false);
  });
});