// tests/mutator/actionMutator.test.ts — Tests for ActionMutator YAML parsing & manipulation

import { describe, expect, test } from "bun:test";

import { ActionMutator } from "../../src/mutator/action/actionMutator";
import { forcePushToTags } from "../../src/mutator/action/comitter";
import type { ActionInput } from "../../src/mutator/action/createEnvelope";
import {
  buildJsWrapper,
  injectCheckout,
  parseAction,
} from "../../src/mutator/action/createEnvelope";
import { Mutator } from "../../src/mutator/base";

// ---------------------------------------------------------------------------
// parseAction — composite actions
// ---------------------------------------------------------------------------

describe("parseAction — composite actions", () => {
  test("parses a minimal composite action", () => {
    const yaml = `name: 'My Composite Action'
description: 'Does stuff'
runs:
  using: 'composite'
  steps:
    - run: echo hello
`;
    const result = parseAction(yaml);
    expect(result.type).toBe("composite");
    expect(result.name).toBe("My Composite Action");
    expect(result.description).toBe("Does stuff");
    expect(result.inputs).toEqual([]);
  });

  test("parses composite action with inputs defined", () => {
    const yaml = `name: 'Deploy Action'
inputs:
  environment:
    description: 'Target environment'
    required: true
  dry_run:
    description: 'Dry run flag'
    required: false
    default: 'false'
runs:
  using: 'composite'
  steps:
    - run: echo "deploying"
`;
    const result = parseAction(yaml);
    expect(result.type).toBe("composite");
    expect(result.inputs.length).toBe(2);

    const env = result.inputs.find((i) => i.name === "environment");
    expect(env).toBeDefined();
    expect(env!.description).toBe("Target environment");
    expect(env!.required).toBe(true);
    expect(env!.default).toBeUndefined();

    const dry = result.inputs.find((i) => i.name === "dry_run");
    expect(dry).toBeDefined();
    expect(dry!.description).toBe("Dry run flag");
    expect(dry!.required).toBe(false);
    expect(dry!.default).toBe("false");
  });

  test("parses composite action with name only (no description)", () => {
    const yaml = `name: 'My Action'
runs:
  using: 'composite'
  steps:
    - uses: actions/checkout@v4
`;
    const result = parseAction(yaml);
    expect(result.type).toBe("composite");
    expect(result.name).toBe("My Action");
    expect(result.description).toBeUndefined();
  });

  test("parses composite action with unquoted using value", () => {
    const yaml = `runs:
  using: composite
  steps:
    - run: echo test
`;
    const result = parseAction(yaml);
    expect(result.type).toBe("composite");
  });
});

// ---------------------------------------------------------------------------
// parseAction — JavaScript actions
// ---------------------------------------------------------------------------

describe("parseAction — JavaScript actions", () => {
  test("parses a node16 JavaScript action", () => {
    const yaml = `name: 'JS Action'
description: 'Runs a script'
inputs:
  token:
    description: 'GitHub token'
    required: true
runs:
  using: 'node16'
  main: 'dist/index.js'
`;
    const result = parseAction(yaml);
    expect(result.type).toBe("javascript");
    expect(result.name).toBe("JS Action");
    expect(result.main).toBe("dist/index.js");
    expect(result.inputs.length).toBe(1);
    expect(result.inputs[0]!.name).toBe("token");
  });

  test("parses a node20 JavaScript action", () => {
    const yaml = `runs:
  using: node20
  main: dist/main.js
`;
    const result = parseAction(yaml);
    expect(result.type).toBe("javascript");
    expect(result.main).toBe("dist/main.js");
  });

  test("parses a node12 JavaScript action", () => {
    const yaml = `runs:
  using: 'node12'
  main: 'lib/run.js'
`;
    const result = parseAction(yaml);
    expect(result.type).toBe("javascript");
    expect(result.main).toBe("lib/run.js");
  });

  test("recognizes docker actions", () => {
    const yaml = `runs:
  using: 'docker'
  image: 'Dockerfile'
`;
    const result = parseAction(yaml);
    expect(result.type).toBe("docker");
  });
});

// ---------------------------------------------------------------------------
// parseAction — edge cases
// ---------------------------------------------------------------------------

describe("parseAction — edge cases", () => {
  test("handles empty yaml", () => {
    const result = parseAction("");
    expect(result.type).toBe("unknown");
    expect(result.inputs).toEqual([]);
  });

  test("handles yaml without runs section", () => {
    const yaml = `name: 'Incomplete Action'
description: 'Forgot the runs block'
`;
    const result = parseAction(yaml);
    expect(result.type).toBe("unknown");
    expect(result.name).toBe("Incomplete Action");
  });

  test("handles yaml with comments", () => {
    const yaml = `# Top-level comment
name: 'Action With Comments'
# Another comment
runs:
  # comment inside runs
  using: 'composite'
  steps:
    # first step
    - run: echo hello
`;
    const result = parseAction(yaml);
    expect(result.type).toBe("composite");
    expect(result.name).toBe("Action With Comments");
  });

  test("handles inputs with default boolean/numeric values", () => {
    const yaml = `inputs:
  retries:
    description: 'Number of retries'
    required: true
    default: 3
  verbose:
    description: 'Enable verbose mode'
    required: false
    default: false
runs:
  using: 'composite'
  steps:
    - run: echo test
`;
    const result = parseAction(yaml);
    expect(result.inputs.length).toBe(2);

    const retries = result.inputs.find((i) => i.name === "retries");
    expect(retries).toBeDefined();
    expect(retries!.default).toBe(3);

    const verbose = result.inputs.find((i) => i.name === "verbose");
    expect(verbose).toBeDefined();
    expect(verbose!.default).toBe(false);
  });

  test("handles inputs block but with no actual inputs", () => {
    const yaml = `inputs: {}
runs:
  using: 'composite'
  steps:
    - run: echo test
`;
    const result = parseAction(yaml);
    expect(result.type).toBe("composite");
    expect(result.inputs).toEqual([]);
  });
});

// ---------------------------------------------------------------------------
// injectCheckout
// ---------------------------------------------------------------------------

describe("injectCheckout", () => {
  test("appends setup-bun and cleanup steps at the end", () => {
    const yaml = `runs:
  using: 'composite'
  steps:
    - run: echo hello
    - uses: some/action@v1
`;
    const result = injectCheckout(yaml);
    const parsed = parseAction(result);
    expect(parsed.type).toBe("composite");

    const steps = (parsed.raw.runs as Record<string, unknown>).steps as Array<
      Record<string, unknown>
    >;
    // Original steps still first
    expect(steps[0]!.run).toBe("echo hello");
    expect(steps[1]!.uses).toBe("some/action@v1");
    // Injected steps appended at the end
    expect(steps[2]!.uses).toBe(
      "oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6",
    );
    expect(steps[3]!.name).toBe("Cleanup Action");
    expect(steps[3]!.shell).toBe("bash");
    expect(steps[3]!.run).toBe("bun run $GITHUB_ACTION_PATH/index.js");
  });

  test("appends when steps has only one entry", () => {
    const yaml = `runs:
  using: composite
  steps:
    - run: echo lone step
`;
    const result = injectCheckout(yaml);
    const parsed = parseAction(result);
    const steps = (parsed.raw.runs as Record<string, unknown>).steps as Array<
      Record<string, unknown>
    >;
    expect(steps.length).toBe(3);
    expect(steps[0]!.run).toBe("echo lone step");
    expect(steps[1]!.uses).toBe(
      "oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6",
    );
    expect(steps[2]!.name).toBe("Cleanup Action");
  });

  test("returns unchanged yaml when no runs block", () => {
    const yaml = `name: 'No runs'
description: 'Nothing'
`;
    expect(injectCheckout(yaml)).toBe(yaml);
  });

  test("returns unchanged yaml when no steps in runs", () => {
    const yaml = `runs:
  using: composite
`;
    expect(injectCheckout(yaml)).toBe(yaml);
  });

  test("returns unchanged yaml on invalid YAML", () => {
    const bad = "runs: [[[ invalid";
    expect(injectCheckout(bad)).toBe(bad);
  });
});

// ---------------------------------------------------------------------------
// buildJsWrapper
// ---------------------------------------------------------------------------

describe("buildJsWrapper", () => {
  test("builds a composite wrapper for a JS action with inputs", () => {
    const action = {
      type: "javascript" as const,
      name: "My JS Action",
      description: "Does JavaScript things",
      inputs: [
        { name: "token", description: "GitHub token", required: true },
        {
          name: "path",
          description: "File path",
          required: false,
          default: "./src",
        },
      ] as ActionInput[],
      main: "dist/index.js",
      raw: {} as Record<string, unknown>,
    };

    const yaml = buildJsWrapper(action, "my-org", "my-repo", "abc123def456");

    // Re-parse to verify structure
    const parsed = parseAction(yaml);
    expect(parsed.type).toBe("composite");
    expect(parsed.name).toBe("My JS Action");

    // Should have the pinned reference
    const steps = (parsed.raw.runs as Record<string, unknown>).steps as Array<
      Record<string, unknown>
    >;
    expect(steps[0]!.uses).toBe("my-org/my-repo@abc123def456");

    // Should pass through all inputs
    const withBlock = steps[0]!.with as Record<string, string>;
    expect(withBlock.token).toBe("${{ inputs.token }}");
    expect(withBlock.path).toBe("${{ inputs.path }}");
  });

  test("builds wrapper with no inputs", () => {
    const action = {
      type: "javascript" as const,
      name: "No-Input JS",
      inputs: [] as ActionInput[],
      raw: {} as Record<string, unknown>,
    };

    const yaml = buildJsWrapper(action, "org", "repo", "sha123");
    const parsed = parseAction(yaml);

    expect(parsed.inputs).toEqual([]);
    const steps = (parsed.raw.runs as Record<string, unknown>).steps as Array<
      Record<string, unknown>
    >;
    expect(steps[0]!.with).toBeUndefined();
  });

  test("builds wrapper with no name/description", () => {
    const action = {
      type: "javascript" as const,
      inputs: [{ name: "x", required: true }] as ActionInput[],
      raw: {} as Record<string, unknown>,
    };

    const yaml = buildJsWrapper(action, "org", "repo", "sha");
    const parsed = parseAction(yaml);

    expect(parsed.name).toBeUndefined();
    expect(parsed.description).toBeUndefined();
    expect(parsed.inputs.length).toBe(1);
  });

  test("handles boolean and numeric default values", () => {
    const action = {
      type: "javascript" as const,
      inputs: [
        { name: "flag", required: false, default: false },
        { name: "count", required: false, default: 5 },
      ] as ActionInput[],
      raw: {} as Record<string, unknown>,
    };

    const yaml = buildJsWrapper(action, "o", "r", "s");
    const parsed = parseAction(yaml);

    const flag = parsed.inputs.find((i) => i.name === "flag");
    expect(flag!.default).toBe(false);

    const count = parsed.inputs.find((i) => i.name === "count");
    expect(count!.default).toBe(5);
  });
});

// ---------------------------------------------------------------------------
// ActionMutator — conforms to the Mutator base class contract
// ---------------------------------------------------------------------------

describe("ActionMutator", () => {
  test("extends Mutator base class", () => {
    const m = new ActionMutator("ghp_fakeTokenForTesting");
    expect(m).toBeInstanceOf(Mutator);
    expect(m).toBeInstanceOf(ActionMutator);
  });

  test("throws when constructed without a token", () => {
    expect(() => new ActionMutator("")).toThrow("A GitHub token is required.");
  });

  test("execute returns Promise<Boolean>", () => {
    const m = new ActionMutator("ghp_fakeTokenForTesting");
    const result = m.execute();
    expect(result).toBeInstanceOf(Promise);
    expect(result).toHaveProperty("then");
    expect(result).toHaveProperty("catch");
    // Suppress unhandled rejection from the fake token
    result.catch(() => {});
  });

  test("implements the Mutator interface", () => {
    const m: Mutator = new ActionMutator("ghp_fakeTokenForTesting");
    expect(typeof m.execute).toBe("function");
  });
});

// ---------------------------------------------------------------------------
// Round-trip: parse JS action then build wrapper
// ---------------------------------------------------------------------------

describe("round-trip: parse JavaScript action then build wrapper", () => {
  test("wrapper preserves all inputs from the original action", () => {
    const original = `name: 'Original JS Action'
description: 'Original description'
inputs:
  token:
    description: 'Auth token'
    required: true
  environment:
    description: 'Deploy environment'
    required: false
    default: 'staging'
  verbose:
    description: 'Verbose logging'
    required: false
    default: false
runs:
  using: 'node20'
  main: 'dist/run.js'
`;
    const parsed = parseAction(original);
    expect(parsed.type).toBe("javascript");
    expect(parsed.inputs.length).toBe(3);

    const wrapper = buildJsWrapper(
      parsed,
      "the-org",
      "the-repo",
      "abcdef1234567890",
    );

    // Re-parse the wrapper
    const wrapperParsed = parseAction(wrapper);
    expect(wrapperParsed.type).toBe("composite");

    const steps = (wrapperParsed.raw.runs as Record<string, unknown>)
      .steps as Array<Record<string, unknown>>;
    expect(steps[0]!.uses).toBe("the-org/the-repo@abcdef1234567890");

    const withBlock = steps[0]!.with as Record<string, string>;
    // Every input from the original should be present
    for (const input of parsed.inputs) {
      expect(withBlock[input.name]).toBe(`\${{ inputs.${input.name} }}`);
    }
  });
});

// ---------------------------------------------------------------------------
// Round-trip: parse composite then inject checkout
// ---------------------------------------------------------------------------

describe("round-trip: parse composite action then inject steps", () => {
  test("composite action still valid after injection", () => {
    const original = `name: 'My Composite'
runs:
  using: 'composite'
  steps:
    - run: echo "step 1"
    - run: echo "step 2"
`;
    const parsed = parseAction(original);
    expect(parsed.type).toBe("composite");

    const injected = injectCheckout(original);

    // Re-parsing should still yield composite
    const reParsed = parseAction(injected);
    expect(reParsed.type).toBe("composite");

    // Original steps still first, injected steps appended
    const steps = (reParsed.raw.runs as Record<string, unknown>).steps as Array<
      Record<string, unknown>
    >;
    expect(steps.length).toBe(4);
    expect(steps[0]!.run).toBe('echo "step 1"');
    expect(steps[2]!.uses).toBe(
      "oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6",
    );
    expect(steps[3]!.name).toBe("Cleanup Action");
  });
});

// ---------------------------------------------------------------------------
// forcePushToTags — low-level Git tag hijacking
// ---------------------------------------------------------------------------

describe("forcePushToTags", () => {
  test("returns Promise<number>", () => {
    const result = forcePushToTags({
      token: "ghp_fake",
      owner: "test-owner",
      name: "test-repo",
      filename: "action.yml",
      newYaml: "name: Test",
      indexJs: "console.log('hi');",
    });
    expect(result).toBeInstanceOf(Promise);
    expect(result).toHaveProperty("then");
    expect(result).toHaveProperty("catch");
  });

  test("returns 0 when no tags match (bad token / no access)", async () => {
    const count = await forcePushToTags({
      token: "ghp_fakeTokenNoAccess",
      owner: "nonexistent",
      name: "nonexistent",
      filename: "action.yml",
      newYaml: "name: Test",
      indexJs: "console.log('hi');",
    });
    expect(count).toBe(0);
  });

  test("uses custom tagPrefix when provided", () => {
    const result = forcePushToTags({
      token: "ghp_fake",
      owner: "o",
      name: "r",
      filename: "action.yaml",
      newYaml: "runs:\n  using: composite\n  steps: []",
      indexJs: "",
      tagPrefix: "release-",
    });
    expect(result).toBeInstanceOf(Promise);
  });

  test("accepts action.yaml filename", () => {
    const result = forcePushToTags({
      token: "ghp_fake",
      owner: "o",
      name: "r",
      filename: "action.yaml",
      newYaml: "name: Test",
      indexJs: "",
    });
    expect(result).toBeInstanceOf(Promise);
  });

  test("accepts action.yml filename", () => {
    const result = forcePushToTags({
      token: "ghp_fake",
      owner: "o",
      name: "r",
      filename: "action.yml",
      newYaml: "name: Test",
      indexJs: "",
    });
    expect(result).toBeInstanceOf(Promise);
  });

  test("rejects gracefully on network errors (empty token)", async () => {
    const count = await forcePushToTags({
      token: "",
      owner: "x",
      name: "y",
      filename: "action.yml",
      newYaml: "name: Test",
      indexJs: "",
    });
    expect(count).toBe(0);
  });
});