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

import { createAuthoringConfigSchema, createNormalizedConfigSchema } from "../../../src/server/config/schema/builder";
import { createConfigJsonSchema } from "../../../src/server/config/schema/export";
import {
  createConfigAjv,
  issuesFromAjvErrors,
  validateConfigContract,
} from "../../../src/server/config/schema/validate";

describe("导出 schema 生成", () => {
  test("createConfigJsonSchema 返回有效 JSON Schema", () => {
    const schema = createConfigJsonSchema();
    expect(schema["$schema"]).toBe("http://json-schema.org/draft-07/schema#");
    expect(schema["$id"]).toBe("https://app.local/config.schema.json");
    expect(schema["type"]).toBe("object");
  });
});

describe("Authoring schema 校验", () => {
  const ajv = createConfigAjv();
  const validate = ajv.compile(createAuthoringConfigSchema());

  test("接受空对象", () => {
    expect(validate({})).toBe(true);
  });

  test("接受新布局 server.listen", () => {
    expect(validate({ server: { listen: { host: "127.0.0.1", port: 3000 } } })).toBe(true);
  });

  test("接受变量引用语法", () => {
    expect(validate({ server: { listen: { port: "${PORT|3000}" } } })).toBe(true);
  });

  test("接受 variables 字段", () => {
    expect(validate({ variables: { HOST: "127.0.0.1" } })).toBe(true);
  });

  test("接受 server.storage.dataDir", () => {
    expect(validate({ server: { storage: { dataDir: "./data" } } })).toBe(true);
  });

  test("接受 server.logging 合法配置", () => {
    expect(
      validate({
        server: {
          logging: {
            console: { level: "debug" },
            file: {
              level: "warn",
              path: "/var/log/app.log",
              rotation: { frequency: "daily", maxFiles: 14, size: "50MB" },
            },
            level: "info",
          },
        },
      }),
    ).toBe(true);
  });

  test("接受 server.logging.level 变量引用", () => {
    expect(validate({ server: { logging: { level: "${LOG_LEVEL|info}" } } })).toBe(true);
  });

  test("拒绝 server.logging 中未知字段", () => {
    expect(validate({ server: { logging: { unknownField: true } } })).toBe(false);
  });

  test("拒绝 server.logging.level 非法枚举值", () => {
    expect(validate({ server: { logging: { level: "verbose" } } })).toBe(false);
  });

  test("拒绝 unknown 字段 server.host", () => {
    expect(validate({ server: { host: "127.0.0.1" } })).toBe(false);
    const issues = issuesFromAjvErrors(validate.errors ?? [], {});
    expect(issues.some((i) => i.code === "unknown-field")).toBe(true);
  });

  test("拒绝未知字段 server.port", () => {
    expect(validate({ server: { port: 3000 } })).toBe(false);
    const issues = issuesFromAjvErrors(validate.errors ?? [], {});
    expect(issues.some((i) => i.code === "unknown-field")).toBe(true);
  });

  test("拒绝非法类型 port", () => {
    expect(validate({ server: { listen: { port: "not-a-number" } } })).toBe(false);
  });

  test("拒绝超出范围的 port", () => {
    expect(validate({ server: { listen: { port: 70000 } } })).toBe(false);
  });

  test("拒绝负数 port", () => {
    expect(validate({ server: { listen: { port: -1 } } })).toBe(false);
  });

  test("拒绝顶层未知字段", () => {
    expect(validate({ unknown: true })).toBe(false);
  });
});

describe("Normalized schema 校验", () => {
  const ajv = createConfigAjv();
  const validate = ajv.compile(createNormalizedConfigSchema());

  test("接受新布局 server.listen", () => {
    expect(validate({ server: { listen: { host: "127.0.0.1", port: 3000 } } })).toBe(true);
  });

  test("Normalized 不接受 variables 字段", () => {
    expect(validate({ variables: { HOST: "127.0.0.1" } })).toBe(false);
  });

  test("Normalized 不接受变量引用语法", () => {
    expect(validate({ server: { listen: { port: "${PORT|3000}" } } })).toBe(false);
  });

  test("接受 server.storage.dataDir", () => {
    expect(validate({ server: { storage: { dataDir: "./data" } } })).toBe(true);
  });

  test("接受 server.logging 合法配置", () => {
    expect(
      validate({
        server: {
          logging: {
            console: { level: "debug" },
            file: {
              level: "warn",
              path: "/var/log/app.log",
              rotation: { frequency: "daily", maxFiles: 14, size: "50MB" },
            },
            level: "info",
          },
        },
      }),
    ).toBe(true);
  });

  test("接受空对象", () => {
    expect(validate({})).toBe(true);
  });
});

describe("validateConfigContract", () => {
  test("有效配置通过校验", () => {
    const result = validateConfigContract({ server: { listen: { host: "0.0.0.0", port: 8080 } } });
    expect(result.config).not.toBeNull();
  });

  test("空配置通过校验", () => {
    const result = validateConfigContract({});
    expect(result.config).not.toBeNull();
  });

  test("包含未知字段的配置被拒绝", () => {
    const result = validateConfigContract({ server: { host: "bad" } });
    expect(result.config).toBeNull();
    expect(result.issues.length).toBeGreaterThan(0);
  });
});

describe("schema 同步测试", () => {
  test("config.schema.json 与 createConfigJsonSchema() 输出一致", async () => {
    const file = Bun.file("config.schema.json");
    const existing = await file.text();
    const generated = `${JSON.stringify(createConfigJsonSchema(), null, 2)}\n`;
    expect(existing).toBe(generated);
  });
});