import type Database from "bun:sqlite";

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

import { getSettings, updateSettings } from "../../../src/server/db/settings";
import { createNoopLogger } from "../../../src/server/logger";
import { createMigratedTestDatabase } from "../../helpers";

function withSettingsDb(callback: (db: Database) => void): void {
  const handle = createMigratedTestDatabase("settings-test");
  try {
    callback(handle.db);
    handle.close();
  } finally {
    handle.cleanup();
  }
}

describe("设置数据访问层", () => {
  test("getSettings 无数据时返回默认值", () => {
    withSettingsDb((db) => {
      const result = getSettings(db);
      expect(result).toEqual({ compact: false, theme: "system" });
    });
  });

  test("updateSettings 写入并读取", () => {
    withSettingsDb((db) => {
      const updated = updateSettings(db, { theme: "dark" }, createNoopLogger());
      expect(updated).toEqual({ compact: false, theme: "dark" });

      const read = getSettings(db);
      expect(read).toEqual({ compact: false, theme: "dark" });
    });
  });

  test("updateSettings 部分更新合并", () => {
    withSettingsDb((db) => {
      updateSettings(db, { theme: "dark" }, createNoopLogger());
      const result = updateSettings(db, { theme: "light" }, createNoopLogger());
      expect(result).toEqual({ compact: false, theme: "light" });
    });
  });

  test("getSettings 解析非法 JSON 返回默认值", () => {
    withSettingsDb((db) => {
      db.run(
        "INSERT INTO settings (id, created_at, updated_at, data) VALUES ('default', '2024-01-01T00:00:00.000Z', '2024-01-01T00:00:00.000Z', 'not-json')",
      );
      const result = getSettings(db);
      expect(result).toEqual({ compact: false, theme: "system" });
    });
  });

  test("getSettings 未知 theme 值返回默认值", () => {
    withSettingsDb((db) => {
      db.run(
        "INSERT INTO settings (id, created_at, updated_at, data) VALUES ('default', '2024-01-01T00:00:00.000Z', '2024-01-01T00:00:00.000Z', '{\"theme\":\"unknown\"}')",
      );
      const result = getSettings(db);
      expect(result).toEqual({ compact: false, theme: "system" });
    });
  });

  test("updateSettings 幂等覆盖", () => {
    withSettingsDb((db) => {
      const a = updateSettings(db, { theme: "dark" }, createNoopLogger());
      const b = updateSettings(db, { theme: "dark" }, createNoopLogger());
      expect(a).toEqual({ compact: false, theme: "dark" });
      expect(b).toEqual({ compact: false, theme: "dark" });

      const row = db
        .query("SELECT COUNT(*) as cnt FROM settings WHERE id = 'default' AND deleted_at IS NULL")
        .get() as { cnt: number };
      expect(row.cnt).toBe(1);
    });
  });

  test("getSettings 无 compact 字段时默认 false", () => {
    withSettingsDb((db) => {
      db.run(
        "INSERT INTO settings (id, created_at, updated_at, data) VALUES ('default', '2024-01-01T00:00:00.000Z', '2024-01-01T00:00:00.000Z', '{\"theme\":\"dark\"}')",
      );
      const result = getSettings(db);
      expect(result).toEqual({ compact: false, theme: "dark" });
    });
  });

  test("updateSettings 写入 compact 并读取", () => {
    withSettingsDb((db) => {
      const updated = updateSettings(db, { compact: true }, createNoopLogger());
      expect(updated).toEqual({ compact: true, theme: "system" });

      const read = getSettings(db);
      expect(read).toEqual({ compact: true, theme: "system" });
    });
  });

  test("updateSettings compact 与 theme 合并", () => {
    withSettingsDb((db) => {
      updateSettings(db, { theme: "dark" }, createNoopLogger());
      const result = updateSettings(db, { compact: true }, createNoopLogger());
      expect(result).toEqual({ compact: true, theme: "dark" });
    });
  });

  test("getSettings compact 为非布尔值时回退 false", () => {
    withSettingsDb((db) => {
      db.run(
        "INSERT INTO settings (id, created_at, updated_at, data) VALUES ('default', '2024-01-01T00:00:00.000Z', '2024-01-01T00:00:00.000Z', '{\"theme\":\"dark\",\"compact\":\"yes\"}')",
      );
      const result = getSettings(db);
      expect(result).toEqual({ compact: false, theme: "dark" });
    });
  });

  test("updateSettings 写入 defaultModels 并读取", () => {
    withSettingsDb((db) => {
      const updated = updateSettings(
        db,
        { defaultModels: { text: "model-1", imageRecognition: null } },
        createNoopLogger(),
      );
      expect(updated.defaultModels).toEqual({ text: "model-1", imageRecognition: null });
      expect(updated.compact).toBe(false);
      expect(updated.theme).toBe("system");

      const read = getSettings(db);
      expect(read.defaultModels).toEqual({ text: "model-1", imageRecognition: null });
    });
  });

  test("defaultModels 与 theme/compact 合并持久化", () => {
    withSettingsDb((db) => {
      updateSettings(db, { theme: "dark", compact: true }, createNoopLogger());
      const result = updateSettings(db, { defaultModels: { imageGeneration: "model-2" } }, createNoopLogger());
      expect(result).toEqual({
        compact: true,
        defaultModels: { imageGeneration: "model-2" },
        theme: "dark",
      });
    });
  });

  test("defaultModels 全量替换——前端负责深度合并", () => {
    withSettingsDb((db) => {
      updateSettings(db, { defaultModels: { text: "model-1", imageRecognition: "model-2" } }, createNoopLogger());
      // 前端在 onChange 中负责合并 old + newField，提交完整对象
      const result = updateSettings(
        db,
        { defaultModels: { text: "model-3", imageRecognition: "model-2" } },
        createNoopLogger(),
      );
      expect(result.defaultModels).toEqual({ text: "model-3", imageRecognition: "model-2" });
    });
  });
});