import { describe, it, expect } from "vitest";
import {
  findOrphanedMentions,
  parseRelationships,
  findRelationshipAsymmetry,
  findDeadCharacterMentions,
  findInconsistencies,
  SYMMETRIC_RELATIONSHIPS,
} from "./consistency.js";
import { collectMentionsInDoc } from "./backlinks.js";
import type { Character, Entity, ProseMirrorDoc } from "./types.js";

const doc = (entityId: string | null, name = "Mara"): ProseMirrorDoc => ({
  type: "doc",
  content: [
    {
      type: "paragraph",
      content: [
        { type: "text", text: "She said " },
        { type: "CharacterMention", attrs: entityId ? { entityId, name } : { name } },
      ],
    },
  ],
});

describe("findOrphanedMentions", () => {
  it("flags a mention whose entity id is gone", () => {
    const chapters = [{ id: "ch1", title: "Ch 1", doc: doc("ghost") }];
    const issues = findOrphanedMentions(chapters, new Set(["ada"]));
    expect(issues).toHaveLength(1);
    expect(issues[0]).toMatchObject({ kind: "orphan-mention", entityId: "ghost", chapterId: "ch1" });
  });

  it("does not flag a mention whose entity still exists", () => {
    const chapters = [{ id: "ch1", title: "Ch 1", doc: doc("ada") }];
    expect(findOrphanedMentions(chapters, new Set(["ada"]))).toHaveLength(0);
  });

  it("does not flag a bare name mention (no entityId)", () => {
    const chapters = [{ id: "ch1", title: "Ch 1", doc: doc(null) }];
    expect(findOrphanedMentions(chapters, new Set(["ada"]))).toHaveLength(0);
  });
});

describe("parseRelationships", () => {
  it("parses the relationships array into a targetId map", () => {
    const c: Character = {
      id: "ada",
      projectId: "p",
      name: "Ada",
      role: "",
      bio: "",
      appearance: "",
      voice: "",
      relationships: [
        { targetId: "maria", kind: "sibling", note: "sisters" },
        { targetId: "mark", kind: "ally", note: "" },
      ],
      arc: "",
      status: "active",
      tags: [],
    };
    expect(parseRelationships(c)).toEqual({
      maria: { kind: "sibling", note: "sisters" },
      mark: { kind: "ally", note: "" },
    });
  });
});

describe("findRelationshipAsymmetry", () => {
  const ada: Character = {
    id: "ada",
    projectId: "p",
    name: "Ada",
    role: "",
    bio: "",
    appearance: "",
    voice: "",
    relationships: [{ targetId: "maria", kind: "sibling", note: "" }],
    arc: "",
    status: "active",
    tags: [],
  };
  const maria: Character = {
    id: "maria",
    projectId: "p",
    name: "Maria",
    role: "",
    bio: "",
    appearance: "",
    voice: "",
    relationships: [],
    arc: "",
    status: "active",
    tags: [],
  };
  const brad: Character = {
    id: "brad",
    projectId: "p",
    name: "Brad",
    role: "",
    bio: "",
    appearance: "",
    voice: "",
    relationships: [{ targetId: "ada", kind: "rival", note: "" }],
    arc: "",
    status: "active",
    tags: [],
  };
  const adaBack: Character = {
    ...ada,
    relationships: [
      { targetId: "maria", kind: "sibling", note: "" },
      { targetId: "brad", kind: "rival", note: "" },
    ],
  };

  it("reports a symmetric relationship that is not reciprocated", () => {
    const issues = findRelationshipAsymmetry([ada, maria]);
    expect(issues).toHaveLength(1);
    expect(issues[0]).toMatchObject({ kind: "relationship-asymmetry", fromEntity: "ada", toEntity: "maria", relationship: "sibling" });
  });

  it("does not report when the symmetric relationship is reciprocated", () => {
    const mariaBack: Character = {
      ...maria,
      relationships: [{ targetId: "ada", kind: "sibling", note: "" }],
    };
    const issues = findRelationshipAsymmetry([adaBack, mariaBack, brad]);
    expect(issues).toHaveLength(0);
  });

  it("ignores directed (non-symmetric) relationship kinds", () => {
    const mentor: Character = {
      id: "m",
      projectId: "p",
      name: "Mentor",
      role: "",
      bio: "",
      appearance: "",
      voice: "",
      relationships: [{ targetId: "ada", kind: "mentor", note: "" }],
      arc: "",
      status: "active",
      tags: [],
    };
    expect(findRelationshipAsymmetry([ada, mentor])).toHaveLength(0);
  });

  it("exposes the symmetric kinds", () => {
    expect(SYMMETRIC_RELATIONSHIPS.has("sibling")).toBe(true);
    expect(SYMMETRIC_RELATIONSHIPS.has("mentor")).toBe(false);
  });
});

describe("findInconsistencies", () => {
  it("combines orphan-mention, relationship-asymmetry, and dead-character issues", () => {
    // Chapter mentions "ghost" (orphan) and "ada" (dead character still alive in prose).
    const chapters = [
      {
        id: "ch1",
        title: "Ch 1",
        doc: {
          type: "doc",
          content: [
            {
              type: "paragraph",
              content: [
                { type: "text", text: "Ada met " },
                { type: "CharacterMention", attrs: { entityId: "ada", name: "Ada" } },
                { type: "text", text: " and a " },
                { type: "CharacterMention", attrs: { entityId: "ghost", name: "ghost" } },
              ],
            },
          ],
        } as ProseMirrorDoc,
      },
    ];
    const ada: Character = {
      id: "ada", projectId: "p", name: "Ada", role: "", bio: "", appearance: "", voice: "",
      relationships: [{ targetId: "maria", kind: "sibling", note: "" }],
      arc: "", status: "dead", tags: [],
    };
    const maria: Character = {
      id: "maria", projectId: "p", name: "Maria", role: "", bio: "", appearance: "", voice: "",
      relationships: [], arc: "", status: "active", tags: [],
    };
    const entities: Entity[] = [ada, maria];
    const issues = findInconsistencies(chapters, entities);
    expect(issues.some((i) => i.kind === "orphan-mention")).toBe(true);
    expect(issues.some((i) => i.kind === "relationship-asymmetry")).toBe(true);
    expect(issues.some((i) => i.kind === "dead-character-mentioned")).toBe(true);
  });

  it("does not flag a dead character who is not mentioned in any chapter", () => {
    const chapters = [{ id: "ch1", title: "Ch 1", doc: doc("ghost") }];
    const ada: Character = {
      id: "ada", projectId: "p", name: "Ada", role: "", bio: "", appearance: "", voice: "",
      arc: "", status: "dead", tags: [],
      relationships: [],
    };
    const issues = findDeadCharacterMentions(chapters, [ada]);
    expect(issues).toHaveLength(0);
  });

  it("collects every entity id referenced in a doc", () => {
    const docWithTwo = {
      type: "doc",
      content: [
        {
          type: "paragraph",
          content: [
            { type: "text", text: "Ada and " },
            { type: "CharacterMention", attrs: { entityId: "maria", name: "Maria" } },
            { type: "text", text: " met " },
            { type: "CharacterMention", attrs: { entityId: "brad", name: "Brad" } },
          ],
        },
      ],
    } as ProseMirrorDoc;
    const ids = collectMentionsInDoc(docWithTwo);
    expect([...ids].sort()).toEqual(["brad", "maria"]);
  });
});