import { describe, expect, it } from "vitest";
import type {
  CheckoutPipelineJob,
  CheckoutPrStatusResponse,
  PullRequestTimelineResponse,
} from "@getpaseo/protocol/messages";
import {
  countGitlabPipelineJobs,
  isPipelineActiveStatus,
  mapPipelineStatus,
} from "@/git/forges/gitlab";
import { IDENTITY_COLOR_NAMES, identityColor } from "@/styles/identity-colors";
import {
  deriveAvatarColor,
  formatAge,
  getActivityVerb,
  getStateLabel,
  mapPrPaneData,
} from "./data";

type CheckoutPrStatus = NonNullable<CheckoutPrStatusResponse["payload"]["status"]>;
type PullRequestTimeline = PullRequestTimelineResponse["payload"];

const githubStatus: CheckoutPrStatus["github"] = {
  mergeStateStatus: null,
  autoMergeRequest: null,
  viewerCanEnableAutoMerge: false,
  viewerCanDisableAutoMerge: false,
  viewerCanMergeAsAdmin: false,
  viewerCanUpdateBranch: false,
  repository: {
    autoMergeAllowed: false,
    mergeCommitAllowed: false,
    squashMergeAllowed: false,
    rebaseMergeAllowed: false,
    viewerDefaultMergeMethod: null,
  },
  isMergeQueueEnabled: false,
  isInMergeQueue: false,
};

const baseStatus: CheckoutPrStatus = {
  forge: "github",
  number: 42,
  url: "https://github.com/getpaseo/paseo/pull/42",
  title: "Wire PR pane data",
  state: "open",
  baseRefName: "main",
  headRefName: "feature/pr-pane",
  isMerged: false,
  isDraft: false,
  mergeable: "UNKNOWN",
  checks: [],
  reviewDecision: null,
  github: githubStatus,
};

const baseTimeline: PullRequestTimeline = {
  cwd: "/repo",
  prNumber: 42,
  items: [],
  truncated: false,
  error: null,
  requestId: "timeline-1",
  githubFeaturesEnabled: true,
};

function status(overrides: Partial<CheckoutPrStatus> = {}): CheckoutPrStatus {
  return { ...baseStatus, ...overrides };
}

function timeline(overrides: Partial<PullRequestTimeline> = {}): PullRequestTimeline {
  return { ...baseTimeline, ...overrides };
}

describe("mapPrPaneData", () => {
  it("returns null when no PR status exists", () => {
    expect(mapPrPaneData(null, baseTimeline)).toBeNull();
  });

  it("derives the PR number from the status URL when the status number is absent", () => {
    const data = mapPrPaneData(
      status({
        number: undefined,
        url: "https://github.com/getpaseo/paseo/pull/1284",
      }),
      timeline({ prNumber: 1284 }),
    );

    expect(data?.number).toBe(1284);
  });

  it("returns null when status has no number and no parseable PR URL", () => {
    expect(
      mapPrPaneData(status({ number: undefined, url: "https://github.com/getpaseo/paseo" }), null),
    ).toBeNull();
  });

  it("derives PR state with merged taking precedence over closed, draft, and open", () => {
    expect(
      mapPrPaneData(status({ isMerged: true, isDraft: true, state: "closed" }), baseTimeline)
        ?.state,
    ).toBe("merged");
    expect(
      mapPrPaneData(status({ isMerged: false, isDraft: true, state: "closed" }), baseTimeline)
        ?.state,
    ).toBe("closed");
    expect(mapPrPaneData(status({ isDraft: true, state: "open" }), baseTimeline)?.state).toBe(
      "draft",
    );
    expect(mapPrPaneData(status({ isDraft: false, state: "open" }), baseTimeline)?.state).toBe(
      "open",
    );
  });

  it("keeps checks with null URLs by linking them to the pull request", () => {
    const data = mapPrPaneData(
      status({
        checks: [
          { name: "typecheck", status: "success", url: "https://example.com/checks/1" },
          { name: "legacy status", status: "pending", url: null },
        ],
      }),
      baseTimeline,
    );

    expect(data?.checks).toEqual([
      {
        provider: "github",
        name: "typecheck",
        status: "success",
        url: "https://example.com/checks/1",
      },
      {
        provider: "github",
        name: "legacy status",
        status: "pending",
        url: "https://github.com/getpaseo/paseo/pull/42",
      },
    ]);
  });

  it("maps server check statuses into the frozen check status union", () => {
    const data = mapPrPaneData(
      status({
        checks: [
          {
            name: "success",
            status: "success",
            url: "https://example.com/1",
            workflow: "CI",
            duration: "1m",
          },
          { name: "failure", status: "failure", url: "https://example.com/2" },
          {
            name: "approval",
            status: "pending",
            traits: ["action_required"],
            url: "https://example.com/3",
          },
          { name: "skipped", status: "skipped", url: "https://example.com/4" },
          { name: "cancelled", status: "cancelled", url: "https://example.com/5" },
          {
            name: "manual",
            status: "skipped",
            traits: ["manual"],
            url: "https://example.com/6",
          },
        ],
      }),
      baseTimeline,
    );

    expect(data?.checks).toEqual([
      {
        provider: "github",
        name: "success",
        workflow: "CI",
        status: "success",
        timing: "1m",
        url: "https://example.com/1",
      },
      { provider: "github", name: "failure", status: "failure", url: "https://example.com/2" },
      {
        provider: "github",
        name: "approval",
        status: "pending",
        traits: ["action_required"],
        url: "https://example.com/3",
      },
      { provider: "github", name: "skipped", status: "skipped", url: "https://example.com/4" },
      {
        provider: "github",
        name: "cancelled",
        status: "cancelled",
        url: "https://example.com/5",
      },
      {
        provider: "github",
        name: "manual",
        status: "skipped",
        traits: ["manual"],
        url: "https://example.com/6",
      },
    ]);
  });

  it("marks a running check's elapsed time so it does not read as a finished duration", () => {
    const data = mapPrPaneData(
      status({
        checks: [
          { name: "running", status: "pending", url: "https://example.com/1", duration: "7m" },
          { name: "done", status: "success", url: "https://example.com/2", duration: "1m 4s" },
          { name: "broke", status: "failure", url: "https://example.com/3", duration: "12s" },
          { name: "untimed", status: "pending", url: "https://example.com/4" },
        ],
      }),
      baseTimeline,
    );

    expect(data?.checks.map((check) => check.timing)).toEqual([
      "running 7m",
      "1m 4s",
      "12s",
      undefined,
    ]);
  });

  it("maps GitHub check identifiers into provider refs", () => {
    const data = mapPrPaneData(
      status({
        checks: [
          {
            name: "server-tests",
            status: "failure",
            url: "https://github.com/getpaseo/paseo/actions/runs/456/job/789",
            checkRunId: 12345,
            workflowRunId: 456,
          },
        ],
      }),
      baseTimeline,
    );

    expect(data?.checks).toEqual([
      {
        provider: "github",
        name: "server-tests",
        status: "failure",
        url: "https://github.com/getpaseo/paseo/actions/runs/456/job/789",
        detailRef: { checkRunId: 12345, workflowRunId: 456 },
      },
    ]);
  });

  it("keeps a workflowRunId-only detail ref so Gitea Actions rows stay fetchable", () => {
    const data = mapPrPaneData(
      status({
        forge: "gitea",
        checks: [
          {
            name: "e2e",
            status: "failure",
            url: "https://gitea.com/acme/repo/actions/runs/7001",
            workflowRunId: 7001,
          },
        ],
      }),
      baseTimeline,
    );

    expect(data?.checks[0]?.detailRef).toEqual({ workflowRunId: 7001 });
  });

  it("preserves timeline item order while mapping mixed reviews and comments", () => {
    const data = mapPrPaneData(
      baseStatus,
      timeline({
        items: [
          {
            id: "review-1",
            kind: "review",
            author: "alice",
            reviewState: "approved",
            body: "Looks good.",
            createdAt: Date.UTC(2026, 0, 1, 10, 0, 0),
            url: "https://example.com/review-1",
          },
          {
            id: "comment-1",
            kind: "comment",
            author: "bob",
            body: "One thought.",
            createdAt: Date.UTC(2026, 0, 1, 11, 0, 0),
            url: "https://example.com/comment-1",
          },
        ],
      }),
      Date.UTC(2026, 0, 1, 12, 0, 0),
    );

    expect(data?.activity.map((item) => item.kind)).toEqual(["review", "comment"]);
    expect(data?.activity.map((item) => item.author)).toEqual(["alice", "bob"]);
  });

  it("maps timeline author avatar URLs and inline comment location metadata", () => {
    const data = mapPrPaneData(
      baseStatus,
      timeline({
        items: [
          {
            id: "thread-comment-1",
            kind: "comment",
            author: "inline-reviewer",
            authorUrl: "https://github.com/inline-reviewer",
            avatarUrl: "https://avatars.githubusercontent.com/u/3?v=4",
            body: "This should include line context.",
            createdAt: Date.UTC(2026, 0, 1, 11, 0, 0),
            url: "https://github.com/getpaseo/paseo/pull/42#discussion_r1",
            location: {
              path: "packages/app/src/git/pull-request-panel/data.ts",
              line: 24,
              startLine: 20,
              threadId: "PRRT_1",
              isResolved: true,
              isOutdated: false,
            },
          },
        ],
      }),
      Date.UTC(2026, 0, 1, 12, 0, 0),
    );

    expect(data?.activity).toEqual([
      {
        id: "thread-comment-1",
        provider: "github",
        kind: "comment",
        author: "inline-reviewer",
        authorUrl: "https://github.com/inline-reviewer",
        avatarColor: deriveAvatarColor("inline-reviewer"),
        avatarUrl: "https://avatars.githubusercontent.com/u/3?v=4",
        body: "This should include line context.",
        age: "1h ago",
        url: "https://github.com/getpaseo/paseo/pull/42#discussion_r1",
        location: {
          path: "packages/app/src/git/pull-request-panel/data.ts",
          line: 24,
          startLine: 20,
          threadId: "PRRT_1",
          isResolved: true,
          isOutdated: false,
        },
      },
    ]);
  });

  it("maps a top-level threadId onto general (non-file) discussion comments", () => {
    const data = mapPrPaneData(
      baseStatus,
      timeline({
        items: [
          {
            id: "note-1",
            kind: "comment",
            author: "reviewer-a",
            body: "Can you clarify the rollout?",
            createdAt: Date.UTC(2026, 0, 1, 11, 0, 0),
            url: "https://gitlab.example.com/group/project/-/merge_requests/42#note_1",
            threadId: "disc-1",
          },
        ],
      }),
      Date.UTC(2026, 0, 1, 12, 0, 0),
      "gitlab",
    );

    expect(data?.activity).toHaveLength(1);
    expect(data?.activity[0]).toMatchObject({ id: "note-1", threadId: "disc-1" });
    expect(data?.activity[0].location).toBeUndefined();
  });

  it("maps thread-level resolution onto general (non-file) discussion comments", () => {
    const data = mapPrPaneData(
      baseStatus,
      timeline({
        items: [
          {
            id: "note-2",
            kind: "comment",
            author: "reviewer-a",
            body: "Resolved general discussion.",
            createdAt: Date.UTC(2026, 0, 1, 11, 0, 0),
            url: "https://gitlab.example.com/group/project/-/merge_requests/42#note_2",
            threadId: "disc-2",
            threadIsResolved: true,
          },
        ],
      }),
      Date.UTC(2026, 0, 1, 12, 0, 0),
      "gitlab",
    );

    expect(data?.activity[0]).toMatchObject({ id: "note-2", threadIsResolved: true });
    expect(data?.activity[0].location).toBeUndefined();
  });

  it("filters empty commented reviews but keeps blocking review states", () => {
    const data = mapPrPaneData(
      baseStatus,
      timeline({
        items: [
          {
            id: "commented-empty",
            kind: "review",
            author: "alice",
            reviewState: "commented",
            body: "   ",
            createdAt: 1000,
            url: "https://example.com/commented-empty",
          },
          {
            id: "approved-empty",
            kind: "review",
            author: "bob",
            reviewState: "approved",
            body: "",
            createdAt: 2000,
            url: "https://example.com/approved-empty",
          },
          {
            id: "changes-empty",
            kind: "review",
            author: "cam",
            reviewState: "changes_requested",
            body: "",
            createdAt: 3000,
            url: "https://example.com/changes-empty",
          },
        ],
      }),
      4000,
    );

    expect(data?.activity).toMatchObject([
      { kind: "review", author: "bob", reviewState: "approved", body: "" },
      { kind: "review", author: "cam", reviewState: "changes_requested", body: "" },
    ]);
  });

  it("filters empty issue comments while preserving review activity with empty bodies", () => {
    const data = mapPrPaneData(
      baseStatus,
      timeline({
        items: [
          {
            id: "comment-empty",
            kind: "comment",
            author: "alice",
            body: "   ",
            createdAt: 1000,
            url: "https://example.com/comment-empty",
          },
          {
            id: "approved-empty",
            kind: "review",
            author: "bob",
            reviewState: "approved",
            body: "",
            createdAt: 2000,
            url: "https://example.com/approved-empty",
          },
          {
            id: "approved-body",
            kind: "review",
            author: "cam",
            reviewState: "approved",
            body: "Looks good.",
            createdAt: 3000,
            url: "https://example.com/approved-body",
          },
        ],
      }),
      4000,
    );

    expect(data?.activity).toMatchObject([
      { kind: "review", author: "bob", reviewState: "approved", body: "" },
      { kind: "review", author: "cam", reviewState: "approved", body: "Looks good." },
    ]);
  });

  it("maps review decisions into the frozen pending fallback contract", () => {
    expect(
      mapPrPaneData(status({ reviewDecision: "approved" }), baseTimeline)?.reviewDecision,
    ).toBe("approved");
    expect(
      mapPrPaneData(status({ reviewDecision: "changes_requested" }), baseTimeline)?.reviewDecision,
    ).toBe("changes_requested");
    expect(
      mapPrPaneData(status({ reviewDecision: "review_required" }), baseTimeline)?.reviewDecision,
    ).toBe("pending");
    expect(mapPrPaneData(status({ reviewDecision: null }), baseTimeline)?.reviewDecision).toBe(
      "pending",
    );
    expect(
      mapPrPaneData(
        status({ reviewDecision: undefined as CheckoutPrStatus["reviewDecision"] }),
        baseTimeline,
      )?.reviewDecision,
    ).toBe("pending");
    expect(
      mapPrPaneData(
        status({ reviewDecision: "surprising" as CheckoutPrStatus["reviewDecision"] }),
        baseTimeline,
      )?.reviewDecision,
    ).toBe("pending");
  });

  it("leaves awaiting reviewers intentionally unwired", () => {
    expect(mapPrPaneData(baseStatus, baseTimeline)?.awaitingReviewers).toEqual([]);
  });

  it("defaults the forge to github and omits the project path when neither is supplied", () => {
    const data = mapPrPaneData(baseStatus, baseTimeline);
    expect(data?.forge).toBe("github");
    expect(data?.projectPath).toBeUndefined();
  });

  it("carries the resolved forge and the nested project path for GitLab", () => {
    const data = mapPrPaneData(
      status({ projectPath: "group/subgroup/repo" }),
      baseTimeline,
      undefined,
      "gitlab",
    );
    expect(data?.forge).toBe("gitlab");
    expect(data?.projectPath).toBe("group/subgroup/repo");
  });

  it("rejects stale timeline activity when the timeline PR number differs from status", () => {
    const data = mapPrPaneData(
      baseStatus,
      timeline({
        prNumber: 99,
        items: [
          {
            id: "comment-1",
            kind: "comment",
            author: "alice",
            body: "This belongs to another PR.",
            createdAt: 1000,
            url: "https://example.com/comment-1",
          },
        ],
      }),
      2000,
    );

    expect(data?.activity).toEqual([]);
  });

  it("passes the forge native facts through for pane contributions to derive surfaces", () => {
    const gitlabFacts = {
      forge: "gitlab" as const,
      detailedMergeStatus: "mergeable",
      hasConflicts: false,
      blockingDiscussionsResolved: true,
      approvalsRequired: 2,
      approvalsGiven: 1,
      pipelineStatus: "running",
      pipelineId: 306,
      pipelineUrl: "https://gitlab.com/group/repo/-/pipelines/306",
      mergeWhenPipelineSucceeds: false,
    };
    const data = mapPrPaneData(
      status({
        url: "https://gitlab.com/group/repo/-/merge_requests/7",
        github: undefined,
        forgeSpecific: gitlabFacts,
      }),
      baseTimeline,
      undefined,
      "gitlab",
    );

    expect(data?.forgeSpecific).toEqual({ ...gitlabFacts, mergeStatus: null });
  });

  it("omits forgeSpecific when the status carries no native facts", () => {
    expect(mapPrPaneData(baseStatus, baseTimeline)?.forgeSpecific).toBeUndefined();
  });

  it("omits forgeSpecific when no registered forge schema accepts it", () => {
    const data = mapPrPaneData(
      status({ forgeSpecific: { forge: "gitlab", approvalsRequired: "two" } }),
      baseTimeline,
    );

    expect(data?.forgeSpecific).toBeUndefined();
  });

  it("surfaces Gitea aggregate CI status as a check row", () => {
    const data = mapPrPaneData(
      status({
        forge: "gitea",
        url: "https://gitea.com/group/repo/pulls/7",
        github: undefined,
        forgeSpecific: {
          forge: "gitea",
          mergeable: true,
          hasMerged: false,
          ciStatus: "success",
        },
      }),
      baseTimeline,
      undefined,
      "gitea",
    );

    expect(data?.checks).toEqual([
      {
        provider: "gitea",
        name: "CI",
        status: "success",
        url: "https://gitea.com/group/repo/pulls/7",
      },
    ]);
  });

  it("keeps Forgejo branding and warning presentation for aggregate CI status", () => {
    const data = mapPrPaneData(
      status({
        forge: "forgejo",
        url: "https://forgejo.example.com/group/repo/pulls/7",
        github: undefined,
        forgeSpecific: {
          forge: "gitea",
          mergeable: true,
          hasMerged: false,
          ciStatus: "warning",
        },
      }),
      baseTimeline,
      undefined,
      "forgejo",
    );

    expect(data?.checks).toEqual([
      {
        provider: "forgejo",
        name: "CI",
        status: "failure",
        traits: ["warning"],
        url: "https://forgejo.example.com/group/repo/pulls/7",
      },
    ]);
  });

  it("carries the resolved forge brand and activity provider for GitLab", () => {
    const data = mapPrPaneData(
      status({
        url: "https://gitlab.com/group/repo/-/merge_requests/7",
        github: undefined,
        forgeSpecific: {
          forge: "gitlab",
          detailedMergeStatus: "mergeable",
          hasConflicts: false,
          blockingDiscussionsResolved: true,
          approvalsRequired: 2,
          approvalsGiven: 1,
          pipelineStatus: null,
          pipelineId: null,
          pipelineUrl: null,
          mergeWhenPipelineSucceeds: false,
        },
      }),
      timeline({
        items: [
          {
            id: "note-1",
            kind: "comment",
            author: "reviewer",
            body: "Looks good",
            createdAt: 1000,
            url: "https://gitlab.com/group/repo/-/merge_requests/7#note_1",
          },
        ],
      }),
      2000,
      "gitlab",
    );
    expect(data?.provider).toEqual({ id: "gitlab", label: "GitLab" });
    expect(data?.activity[0]?.provider).toBe("gitlab");
  });
});

describe("mapPipelineStatus", () => {
  it("maps GitLab and neutral pipeline statuses onto check statuses", () => {
    expect(mapPipelineStatus("success")).toBe("success");
    expect(mapPipelineStatus("passed")).toBe("success");
    expect(mapPipelineStatus("failed")).toBe("failure");
    expect(mapPipelineStatus("canceled")).toBe("skipped");
    expect(mapPipelineStatus("skipped")).toBe("skipped");
    expect(mapPipelineStatus("manual")).toBe("pending");
    expect(mapPipelineStatus("running")).toBe("pending");
    expect(mapPipelineStatus("pending")).toBe("pending");
    expect(mapPipelineStatus("created")).toBe("pending");
    expect(mapPipelineStatus("waiting_for_resource")).toBe("pending");
    expect(mapPipelineStatus("preparing")).toBe("pending");
    expect(mapPipelineStatus("canceling")).toBe("pending");
    expect(mapPipelineStatus("scheduled")).toBe("pending");
    expect(mapPipelineStatus("anything-else")).toBe("pending");
  });

  it("separates blocking outcomes from allowed failures and optional manual jobs", () => {
    const job = (id: number, jobStatus: string, allowFailure: boolean): CheckoutPipelineJob => ({
      id,
      name: `job-${id}`,
      stage: "test",
      status: jobStatus,
      rawStatus: jobStatus,
      url: null,
      allowFailure,
      durationSeconds: null,
    });
    expect(
      countGitlabPipelineJobs([
        job(1, "success", false),
        job(2, "failed", false),
        job(3, "failed", true),
        job(4, "pending", false),
        job(5, "manual", true),
        job(6, "manual", false),
      ]),
    ).toEqual({
      success: 1,
      failure: 1,
      warning: 1,
      actionRequired: 1,
      manual: 1,
      pending: 1,
    });
  });

  it("marks running and queued pipeline statuses as live for polling", () => {
    expect(isPipelineActiveStatus("running")).toBe(true);
    expect(isPipelineActiveStatus("pending")).toBe(true);
    expect(isPipelineActiveStatus("created")).toBe(true);
    expect(isPipelineActiveStatus("waiting_for_resource")).toBe(true);
    expect(isPipelineActiveStatus("preparing")).toBe(true);
    expect(isPipelineActiveStatus("canceling")).toBe(true);
    expect(isPipelineActiveStatus("scheduled")).toBe(true);
    expect(isPipelineActiveStatus("success")).toBe(false);
    expect(isPipelineActiveStatus("failed")).toBe(false);
    expect(isPipelineActiveStatus("canceled")).toBe(false);
  });
});

describe("deriveAvatarColor", () => {
  it("returns a shared identity color, matched case-insensitively", () => {
    const palette = IDENTITY_COLOR_NAMES.map(identityColor);

    expect(palette).toContain(deriveAvatarColor("alice"));
    expect(deriveAvatarColor("Alice")).toBe(deriveAvatarColor("alice"));
  });
});

describe("formatAge", () => {
  it("emits PR pane age labels", () => {
    const now = Date.UTC(2026, 0, 1, 12, 0, 0);

    expect(formatAge(now - 20_000, now)).toBe("just now");
    expect(formatAge(now - 5 * 60_000, now)).toBe("5m ago");
    expect(formatAge(now - 2 * 60 * 60_000, now)).toBe("2h ago");
    expect(formatAge(now - 3 * 24 * 60 * 60_000, now)).toBe("3d ago");
    expect(formatAge(now - 90 * 24 * 60 * 60_000, now)).toBe("3mo ago");
    expect(formatAge(now - 365 * 24 * 60 * 60_000, now)).toBe("1y ago");
  });
});

describe("getStateLabel", () => {
  it.each([
    ["open", "Open"],
    ["draft", "Draft"],
    ["merged", "Merged"],
    ["closed", "Closed"],
  ] as const)("maps %s → %s", (state, expected) => {
    expect(getStateLabel(state)).toBe(expected);
  });
});

describe("getActivityVerb", () => {
  it("returns Commented for comment kind", () => {
    expect(getActivityVerb({ kind: "comment" })).toBe("Commented");
  });

  it("returns Approved for approved review", () => {
    expect(getActivityVerb({ kind: "review", reviewState: "approved" })).toBe("Approved");
  });

  it("returns Requested changes for changes_requested review", () => {
    expect(getActivityVerb({ kind: "review", reviewState: "changes_requested" })).toBe(
      "Requested changes",
    );
  });

  it("returns Reviewed for a commented review with body (generic case)", () => {
    expect(getActivityVerb({ kind: "review", reviewState: "commented" })).toBe("Reviewed");
  });

  it("returns Reviewed when reviewState is undefined", () => {
    expect(getActivityVerb({ kind: "review" })).toBe("Reviewed");
  });
});