import { describe, expect, it } from "vitest";
import type { ExecutorProfile } from "@/lib/types/http";
import {
  computeAgentCompatState,
  computeHasRepositorySelection,
  computeSelectedRepoCount,
  filterCompatibleAgentProfiles,
} from "./task-create-dialog-computed";
import type { DialogFormState } from "@/components/task-create-dialog-types";
import type { AgentProfileOption } from "@/lib/state/slices/settings/types";

const URL_A = "github.com/a/b";
const URL_B = "github.com/c/d";

// Minimal fs stub for the two pure helpers below. Each function only reads
// `noRepository`, `useRemote`, `remoteRepos`, and `repositories`, so we cast a
// partial through `unknown` to avoid having to materialise the full
// DialogFormState surface in tests.
function fsStub(overrides: {
  noRepository?: boolean;
  useRemote?: boolean;
  remoteRepos?: Array<{ url?: string; branch?: string }>;
  repositories?: Array<{ repositoryId?: string; localPath?: string; branch?: string }>;
}): DialogFormState {
  return {
    noRepository: false,
    useRemote: false,
    remoteRepos: [],
    repositories: [],
    ...overrides,
  } as unknown as DialogFormState;
}

describe("computeHasRepositorySelection", () => {
  it("returns true in no-repository mode", () => {
    expect(computeHasRepositorySelection(fsStub({ noRepository: true }))).toBe(true);
  });

  it("returns true when any workspace/local row is set", () => {
    expect(computeHasRepositorySelection(fsStub({ repositories: [{ repositoryId: "r-1" }] }))).toBe(
      true,
    );
    expect(
      computeHasRepositorySelection(fsStub({ repositories: [{ localPath: "/tmp/repo" }] })),
    ).toBe(true);
  });

  it("Remote mode: returns true when ANY row has a non-empty URL", () => {
    // First row empty, second row populated — the previous implementation
    // only inspected `remoteRepos[0]` and would have returned false here.
    expect(
      computeHasRepositorySelection(
        fsStub({
          useRemote: true,
          remoteRepos: [{ url: "" }, { url: "github.com/acme/site" }],
        }),
      ),
    ).toBe(true);
  });

  it("Remote mode: returns true when only the first row is populated", () => {
    expect(
      computeHasRepositorySelection(
        fsStub({
          useRemote: true,
          remoteRepos: [{ url: "github.com/acme/site" }],
        }),
      ),
    ).toBe(true);
  });

  it("Remote mode: returns false when every row is empty / whitespace", () => {
    expect(
      computeHasRepositorySelection(
        fsStub({
          useRemote: true,
          remoteRepos: [{ url: "" }, { url: "   " }],
        }),
      ),
    ).toBe(false);
  });

  it("returns false on the empty form", () => {
    expect(computeHasRepositorySelection(fsStub({}))).toBe(false);
  });

  it("Remote mode: ignores hidden workspace/local rows", () => {
    // Toggle-back preserves the workspace/local rows when useRemote flips on
    // — they're hidden from the UI and must not count toward the selection
    // gate. Otherwise the submit button stays enabled in Remote mode even
    // when the user hasn't filled in any URLs.
    expect(
      computeHasRepositorySelection(
        fsStub({
          useRemote: true,
          repositories: [{ repositoryId: "r-1" }],
          remoteRepos: [{ url: "" }],
        }),
      ),
    ).toBe(false);
  });
});

describe("computeSelectedRepoCount", () => {
  it("counts workspace/local rows", () => {
    expect(
      computeSelectedRepoCount(
        fsStub({ repositories: [{ repositoryId: "r-1" }, { localPath: "/x" }] }),
      ),
    ).toBe(2);
  });

  it("ignores empty workspace rows", () => {
    // Half-filled rows (no repositoryId, no localPath) shouldn't count
    // toward the multi-repo gate even though they exist in the array.
    expect(computeSelectedRepoCount(fsStub({ repositories: [{ branch: "main" }] }))).toBe(0);
  });

  it("Remote mode: counts non-empty URL rows only", () => {
    // Two remote URLs — without the local rows, this alone trips the gate.
    expect(
      computeSelectedRepoCount(
        fsStub({
          useRemote: true,
          remoteRepos: [{ url: URL_A }, { url: URL_B }],
        }),
      ),
    ).toBe(2);
  });

  it("Remote mode: ignores hidden workspace/local rows", () => {
    // useRemote=true hides the workspace/local list — those rows must not
    // contribute to the count even if they're still in the form state from
    // a prior mode (toggle-back preserves them).
    expect(
      computeSelectedRepoCount(
        fsStub({
          useRemote: true,
          repositories: [{ repositoryId: "r-1" }, { localPath: "/tmp/x" }],
          remoteRepos: [{ url: URL_A }],
        }),
      ),
    ).toBe(1);
  });

  it("Remote mode: returns 0 when only hidden workspace/local rows exist", () => {
    expect(
      computeSelectedRepoCount(
        fsStub({
          useRemote: true,
          repositories: [{ repositoryId: "r-1" }],
          remoteRepos: [],
        }),
      ),
    ).toBe(0);
  });

  it("returns 0 in no-repository mode regardless of stale rows", () => {
    expect(
      computeSelectedRepoCount(
        fsStub({
          noRepository: true,
          repositories: [{ repositoryId: "r-1" }],
          remoteRepos: [{ url: URL_A }],
          useRemote: true,
        }),
      ),
    ).toBe(0);
  });

  it("ignores remote rows when useRemote is false", () => {
    // The Remote toggle gates the count — switching modes shouldn't smuggle
    // the URL rows into the local count.
    expect(
      computeSelectedRepoCount(
        fsStub({
          useRemote: false,
          remoteRepos: [{ url: URL_A }, { url: URL_B }],
        }),
      ),
    ).toBe(0);
  });

  it("trips the multi-repo gate (>1) on a 2-row Remote selection", () => {
    // Multi-row Remote selection must trigger the same executor gating as
    // a 2-workspace-repo task — the previous implementation only counted
    // workspace/local rows, so this would have stayed at 0 even with two
    // populated URLs.
    const count = computeSelectedRepoCount(
      fsStub({
        useRemote: true,
        remoteRepos: [{ url: "https://github.com/a/b" }, { url: "https://github.com/c/d" }],
      }),
    );
    expect(count).toBe(2);
    expect(count > 1).toBe(true);
  });
});

describe("filterCompatibleAgentProfiles", () => {
  it("removes disabled raw profiles before compatibility and autopick", () => {
    const profiles = [
      {
        id: "enabled",
        label: "Agent • Enabled",
        agent_id: "a1",
        agent_name: "mock-agent",
        cli_passthrough: false,
        enabled: true,
      },
      {
        id: "disabled",
        label: "Agent • Disabled",
        agent_id: "a1",
        agent_name: "mock-agent",
        cli_passthrough: false,
        enabled: false,
      },
    ] satisfies AgentProfileOption[];

    expect(
      filterCompatibleAgentProfiles(
        profiles,
        { executor_type: "local", config: {} } as unknown as ExecutorProfile,
        true,
        [],
      ).map((p) => p.id),
    ).toEqual(["enabled"]);
  });
});

describe("computeAgentCompatState", () => {
  const sprites = {
    id: "exec-sprites",
    executor_type: "sprites",
    config: {},
  } as unknown as ExecutorProfile;
  function profile(id: string, enabled = true): AgentProfileOption {
    return {
      id,
      label: id,
      agent_id: `agent-${id}`,
      agent_name: id,
      cli_passthrough: false,
      enabled,
    };
  }
  const claude = profile("claude");
  const cursor = profile("cursor");
  function state(
    overrides: Partial<Parameters<typeof computeAgentCompatState>[0]> = {},
  ): ReturnType<typeof computeAgentCompatState> {
    return computeAgentCompatState({
      selectedExecutorProfile: sprites,
      compatibleAgentProfiles: [cursor],
      selectedAgentProfileId: claude.id,
      selectedAgentProfile: claude,
      workflowAgentLocked: false,
      dynamicRoutingEnabled: true,
      ...overrides,
    });
  }

  it("is compatible while no executor profile is selected", () => {
    expect(state({ selectedExecutorProfile: null, compatibleAgentProfiles: [] })).toBe(
      "compatible",
    );
  });

  // @covers AC-TASKS-TASK-CREATE-AGENT-COMPATIBILITY-001.4
  it("is none-compatible when the compatible list is empty and nothing locks the agent", () => {
    expect(state({ compatibleAgentProfiles: [] })).toBe("none-compatible");
    expect(
      state({
        compatibleAgentProfiles: [],
        selectedAgentProfileId: "",
        selectedAgentProfile: null,
      }),
    ).toBe("none-compatible");
  });

  it("is compatible while nothing is selected and a compatible profile exists", () => {
    expect(state({ selectedAgentProfileId: "", selectedAgentProfile: null })).toBe("compatible");
  });

  // @covers AC-TASKS-TASK-CREATE-AGENT-COMPATIBILITY-001.6
  it("is selected-incompatible, never none-compatible, when the selection is absent from a non-empty list", () => {
    expect(state()).toBe("selected-incompatible");
  });

  // @covers AC-TASKS-TASK-CREATE-AGENT-COMPATIBILITY-001.3
  it("is compatible when the selection is in the list", () => {
    expect(state({ compatibleAgentProfiles: [claude, cursor] })).toBe("compatible");
  });

  // @covers AC-TASKS-TASK-CREATE-AGENT-COMPATIBILITY-001.5
  it("keeps the workflow-locked state even when nothing else is compatible", () => {
    expect(state({ compatibleAgentProfiles: [], workflowAgentLocked: true })).toBe(
      "selected-incompatible",
    );
  });

  it("treats a disabled locked profile as no compatible agent, not a credential problem", () => {
    const disabled = profile("disabled", false);
    expect(
      state({
        selectedAgentProfileId: disabled.id,
        selectedAgentProfile: disabled,
        workflowAgentLocked: true,
      }),
    ).toBe("none-compatible");
  });

  it("keeps an unlocked disabled selection distinct when an alternative exists", () => {
    const disabled = profile("disabled", false);
    expect(
      state({
        selectedAgentProfileId: disabled.id,
        selectedAgentProfile: disabled,
        workflowAgentLocked: false,
        compatibleAgentProfiles: [cursor],
      }),
    ).toBe("selected-unavailable");
  });

  it("keeps an unlocked dynamic selection distinct when routing is disabled", () => {
    const dynamic = { ...profile("dynamic"), kind: "dynamic" } satisfies AgentProfileOption;
    expect(
      state({
        selectedAgentProfileId: dynamic.id,
        selectedAgentProfile: dynamic,
        workflowAgentLocked: false,
        dynamicRoutingEnabled: false,
        compatibleAgentProfiles: [cursor],
      }),
    ).toBe("selected-unavailable");
  });

  it("treats an unknown selected id as a credential problem when a compatible profile exists", () => {
    expect(state({ selectedAgentProfileId: "gone", selectedAgentProfile: null })).toBe(
      "selected-incompatible",
    );
  });
});