import { assertEquals, assertStringIncludes } from "jsr:@std/assert";
import { Project } from "ts-morph";
import { generateInterfaces } from "../src/interfaces.ts";
import type { Lexicon } from "../src/mod.ts";

function createTestProject() {
  return new Project({ useInMemoryFileSystem: true });
}

Deno.test("generateInterfaces - creates record interfaces", () => {
  const project = createTestProject();
  const sourceFile = project.createSourceFile("test.ts", "");

  const lexicons: Lexicon[] = [
    {
      id: "com.example.post",
      definitions: {
        main: {
          type: "record",
          record: {
            type: "record",
            properties: {
              text: { type: "string" },
              createdAt: { type: "string", format: "datetime" },
              likes: { type: "integer" },
            },
            required: ["text", "createdAt"],
          },
        },
      },
    },
  ];

  generateInterfaces(sourceFile, lexicons);
  const result = sourceFile.getFullText();

  // Should create interface for the record
  assertStringIncludes(result, "export interface ComExamplePost");
  assertStringIncludes(result, "text: string;");
  assertStringIncludes(result, "createdAt: string;");
  assertStringIncludes(result, "likes?: number;");

  // Should create sort fields type alias
  assertStringIncludes(result, "export type ComExamplePostSortFields");
  assertStringIncludes(result, '"text" | "createdAt" | "likes"');
});

Deno.test("generateInterfaces - creates object interfaces", () => {
  const project = createTestProject();
  const sourceFile = project.createSourceFile("test.ts", "");

  const lexicons: Lexicon[] = [
    {
      id: "app.bsky.embed.defs",
      definitions: {
        aspectRatio: {
          type: "object",
          properties: {
            width: { type: "integer" },
            height: { type: "integer" },
          },
          required: ["width", "height"],
        },
      },
    },
  ];

  generateInterfaces(sourceFile, lexicons);
  const result = sourceFile.getFullText();

  assertStringIncludes(result, "export interface AppBskyEmbedDefsAspectRatio");
  assertStringIncludes(result, "width: number;");
  assertStringIncludes(result, "height: number;");
});

Deno.test("generateInterfaces - creates union type aliases", () => {
  const project = createTestProject();
  const sourceFile = project.createSourceFile("test.ts", "");

  const lexicons: Lexicon[] = [
    {
      id: "app.bsky.embed.defs",
      definitions: {
        view: {
          type: "union",
          refs: ["#imageView", "#videoView"],
          closed: false,
        },
        imageView: {
          type: "object",
          properties: { alt: { type: "string" } },
        },
        videoView: {
          type: "object",
          properties: { duration: { type: "integer" } },
        },
      },
    },
  ];

  generateInterfaces(sourceFile, lexicons);
  const result = sourceFile.getFullText();

  assertStringIncludes(result, "export type AppBskyEmbedDefsView");
  assertStringIncludes(result, "AppBskyEmbedDefs[\"ImageView\"]");
  assertStringIncludes(result, "AppBskyEmbedDefs[\"VideoView\"]");
  // Open union should include unknown type
  assertStringIncludes(result, "{ $type: string; [key: string]: unknown }");
});

Deno.test("generateInterfaces - creates known values types", () => {
  const project = createTestProject();
  const sourceFile = project.createSourceFile("test.ts", "");

  const lexicons: Lexicon[] = [
    {
      id: "com.example.post",
      definitions: {
        main: {
          type: "record",
          record: {
            type: "record",
            properties: {
              status: {
                type: "string",
                knownValues: ["draft", "published", "archived"],
              },
            },
          },
        },
      },
    },
  ];

  generateInterfaces(sourceFile, lexicons);
  const result = sourceFile.getFullText();

  assertStringIncludes(result, "export type ComExamplePostStatus");
  assertStringIncludes(result, "'draft'");
  assertStringIncludes(result, "'published'");
  assertStringIncludes(result, "'archived'");
  assertStringIncludes(result, "(string & Record<string, never>)");
});

Deno.test("generateInterfaces - creates namespace interfaces", () => {
  const project = createTestProject();
  const sourceFile = project.createSourceFile("test.ts", "");

  const lexicons: Lexicon[] = [
    {
      id: "app.bsky.embed.defs",
      definitions: {
        aspectRatio: {
          type: "object",
          properties: { width: { type: "integer" } },
        },
        view: {
          type: "union",
          refs: ["#aspectRatio"],
        },
      },
    },
  ];

  generateInterfaces(sourceFile, lexicons);
  const result = sourceFile.getFullText();

  // Should create namespace interface for multiple definitions
  assertStringIncludes(result, "export interface AppBskyEmbedDefs");
  assertStringIncludes(result, "readonly AspectRatio: AppBskyEmbedDefsAspectRatio;");
  assertStringIncludes(result, "readonly View: AppBskyEmbedDefsView;");
});

Deno.test("generateInterfaces - generates from network.slices lexicons", () => {
  const project = createTestProject();
  const sourceFile = project.createSourceFile("test.ts", "");

  const lexicons = [
    {
      id: "network.slices.slice",
      definitions: {
        main: {
          type: "record",
          record: {
            type: "record",
            properties: {
              name: { type: "string" },
            },
            required: ["name"],
          },
        },
      },
    },
  ];

  generateInterfaces(sourceFile, lexicons);
  const result = sourceFile.getFullText();

  assertStringIncludes(result, "export interface NetworkSlicesSlice");
  assertStringIncludes(result, "name: string;");
});

Deno.test("generateInterfaces - generates empty output for empty lexicons", () => {
  const project = createTestProject();
  const sourceFile = project.createSourceFile("test.ts", "");

  generateInterfaces(sourceFile, []);
  const result = sourceFile.getFullText();

  // Should have minimal output for empty lexicons
  assertEquals(result.trim(), "");
});

Deno.test("generateInterfaces - handles single definition lexicons", () => {
  const project = createTestProject();
  const sourceFile = project.createSourceFile("test.ts", "");

  const lexicons: Lexicon[] = [
    {
      id: "com.atproto.repo.strongRef",
      definitions: {
        main: {
          type: "object",
          properties: {
            uri: { type: "string" },
            cid: { type: "string" },
          },
          required: ["uri", "cid"],
        },
      },
    },
  ];

  generateInterfaces(sourceFile, lexicons);
  const result = sourceFile.getFullText();

  // Should use clean name for single definition
  assertStringIncludes(result, "export interface ComAtprotoRepoStrongRef");
  assertStringIncludes(result, "uri: string;");
  assertStringIncludes(result, "cid: string;");

  // Should NOT create namespace interface for single definition
  assertEquals(result.includes("readonly Main:"), false);
});