import { describe, it, expect } from "vitest";
import { parseConnectionString, looksLikeConnectionString, detectProviderFromHost, buildConnectionUrl, suggestConnectionLabel } from "./connectionString";
import type { Connection } from "./types";

function makeConn(overrides: Partial<Connection> = {}): Connection {
  return {
    id: "c1",
    name: "Test",
    db_type: "postgresql",
    host: "localhost",
    port: 5432,
    username: "user",
    folder_id: null,
    keychain_ref: null,
    tag_ids: [],
    favorite: false,
    created_at: "",
    updated_at: "",
    ...overrides,
  };
}

describe("parseConnectionString", () => {
  it("parses a PostgreSQL URL", () => {
    const result = parseConnectionString("postgresql://user:pass@localhost:5432/mydb");
    expect(result).toEqual({
      db_type: "postgresql",
      host: "localhost",
      port: 5432,
      username: "user",
      password: "pass",
      database: "mydb",
      ssl_mode: null,
    });
  });

  it("parses a MySQL URL without password", () => {
    const result = parseConnectionString("mysql://root@127.0.0.1:3306/app");
    expect(result).toEqual({
      db_type: "mysql",
      host: "127.0.0.1",
      port: 3306,
      username: "root",
      password: null,
      database: "app",
      ssl_mode: null,
    });
  });

  it("parses a Redis URL", () => {
    const result = parseConnectionString("redis://user:pass@localhost:6379/0");
    expect(result).toEqual({
      db_type: "redis",
      host: "localhost",
      port: 6379,
      username: "user",
      password: "pass",
      database: "0",
      ssl_mode: null,
    });
  });

  it("parses a SQLite file URL — path maps to host (v0.7.0 fix)", () => {
    const result = parseConnectionString("sqlite:///path/to/db.sqlite");
    expect(result).toEqual({
      db_type: "sqlite",
      host: "/path/to/db.sqlite",
      port: null,
      username: null,
      password: null,
      database: null,
      ssl_mode: null,
    });
  });

  it("parses a SQLite file: URL — path maps to host", () => {
    const result = parseConnectionString("file:///Users/me/data.db");
    expect(result).toEqual({
      db_type: "sqlite",
      host: "/Users/me/data.db",
      port: null,
      username: null,
      password: null,
      database: null,
      ssl_mode: null,
    });
  });

  it("defaults PostgreSQL port to 5432 when omitted", () => {
    const result = parseConnectionString("postgresql://user@host/db");
    expect(result).toEqual({
      db_type: "postgresql",
      host: "host",
      port: 5432,
      username: "user",
      password: null,
      database: "db",
      ssl_mode: null,
    });
  });

  it("preserves database name when query parameters are present", () => {
    const result = parseConnectionString("postgresql://user@host/db?sslmode=require");
    expect(result).toEqual({
      db_type: "postgresql",
      host: "host",
      port: 5432,
      username: "user",
      password: null,
      database: "db",
      ssl_mode: "require",
    });
  });

  it("returns null for an empty string", () => {
    expect(parseConnectionString("")).toBeNull();
  });
  it("lifts sslmode from a Neon-style URL (extra params ignored)", () => {
    const result = parseConnectionString(
      "postgresql://neondb_owner:pw@ep-hidden-star-b3hqtp4x-pooler.c-4.ap-southeast-1.aws.neon.tech/neondb?sslmode=require&channel_binding=require",
    );
    expect(result).toMatchObject({
      db_type: "postgresql",
      host: "ep-hidden-star-b3hqtp4x-pooler.c-4.ap-southeast-1.aws.neon.tech",
      username: "neondb_owner",
      password: "pw",
      database: "neondb",
      ssl_mode: "require",
    });
  });

  it("lifts every supported sslmode value", () => {
    const mode = (q: string) => parseConnectionString(`postgresql://u@h/db?sslmode=${q}`)?.ssl_mode;
    expect(mode("disable")).toBe("disable");
    expect(mode("require")).toBe("require");
    expect(mode("verify-ca")).toBe("verify-ca");
    expect(mode("verify-full")).toBe("verify-full");
    expect(mode("VERIFY-FULL")).toBe("verify-full");
    expect(mode("verify_full")).toBe("verify-full");
  });

  it("ignores unsupported sslmode values instead of downgrading to plaintext", () => {
    expect(parseConnectionString("postgresql://u@h/db?sslmode=allow")?.ssl_mode).toBeNull();
    expect(parseConnectionString("postgresql://u@h/db?sslmode=prefer")?.ssl_mode).toBeNull();
    expect(parseConnectionString("postgresql://u@h/db?sslmode=bogus")?.ssl_mode).toBeNull();
  });

  it("lifts MySQL's ssl-mode vocabulary and skips TLS for non-SQL db types", () => {
    expect(parseConnectionString("mysql://u@h/db?ssl-mode=REQUIRED")?.ssl_mode).toBe("require");
    expect(parseConnectionString("mysql://u@h/db?ssl-mode=verify-full")?.ssl_mode).toBe("verify-full");
    expect(parseConnectionString("mysql://u@h/db?ssl-mode=VERIFY_IDENTITY")?.ssl_mode).toBe("verify-full");
    expect(parseConnectionString("mysql://u@h/db?ssl-mode=PREFERRED")?.ssl_mode).toBeNull();
    expect(parseConnectionString("redis://u@h?sslmode=require")?.ssl_mode).toBeNull();
    expect(parseConnectionString("sqlite:///tmp/a.db?sslmode=require")?.ssl_mode).toBeNull();
  });

  it("returns null for a non-URL string", () => {
    expect(parseConnectionString("hello world")).toBeNull();
  });

  it("defaults MySQL port to 3306 when omitted", () => {
    const result = parseConnectionString("mysql://user@host/db");
    expect(result).toEqual({
      db_type: "mysql",
      host: "host",
      port: 3306,
      username: "user",
      password: null,
      database: "db",
      ssl_mode: null,
    });
  });

  it("parses mariadb:// with the 3306 default port", () => {
    const result = parseConnectionString("mariadb://root:pw@localhost/app");
    expect(result).toEqual({
      db_type: "mariadb",
      host: "localhost",
      port: 3306,
      username: "root",
      password: "pw",
      database: "app",
      ssl_mode: null,
    });
  });

  it("keeps mysql:// mapped to the mysql db_type", () => {
    const result = parseConnectionString("mysql://root:pw@localhost:3307/app");
    expect(result).toEqual({
      db_type: "mysql",
      host: "localhost",
      port: 3307,
      username: "root",
      password: "pw",
      database: "app",
      ssl_mode: null,
    });
  });

  it("defaults Redis port to 6379 when omitted", () => {
    const result = parseConnectionString("redis://localhost");
    expect(result).toEqual({
      db_type: "redis",
      host: "localhost",
      port: 6379,
      username: null,
      password: null,
      database: null,
      ssl_mode: null,
    });
  });
});

describe("looksLikeConnectionString", () => {
  it("returns true for postgres URL", () => {
    expect(looksLikeConnectionString("postgresql://a@b/c")).toBe(true);
  });

  it("returns true for Redis URL", () => {
    expect(looksLikeConnectionString("redis://localhost")).toBe(true);
  });

  it("returns true for SQLite URL", () => {
    expect(looksLikeConnectionString("sqlite:///path/to/db.sqlite")).toBe(true);
  });

  it("returns false for normal search text", () => {
    expect(looksLikeConnectionString("production database")).toBe(false);
  });
});

describe("suggestConnectionLabel", () => {
  const label = (url: string) => {
    const parsed = parseConnectionString(url)!;
    return suggestConnectionLabel(parsed);
  };

  it("prefers the database name", () => {
    expect(
      label("postgresql://neondb_owner:pw@ep-x-pooler.c-4.ap-southeast-1.aws.neon.tech/neondb?sslmode=require"),
    ).toBe("neondb");
  });

  it("falls back to the host when there is no database", () => {
    expect(label("postgresql://u@db.example.com:5432")).toBe("db.example.com");
  });

  it("uses the file stem for SQLite paths", () => {
    expect(label("sqlite:///Users/me/data/app-demo.sqlite")).toBe("app-demo");
    expect(label("file:///tmp/notes.db")).toBe("notes");
  });

  it("caps the label at the 100-char validation limit", () => {
    const host = `${"a".repeat(120)}.example.com`;
    expect(label(`postgresql://u@${host}/`).length).toBe(100);
  });
});

describe("detectProviderFromHost", () => {
    it("detects Supabase by host suffix", () => {
      expect(detectProviderFromHost("db.abcdefghijklmnopqrst.supabase.co")).toBe("supabase");
      expect(detectProviderFromHost("aws-us-east-1.pooler.supabase.com")).toBeNull();
    });
    it("detects NeonDB by host suffix", () => {
      expect(detectProviderFromHost("ep-cool-darkness-a1b2c3d4-pooler.us-east-2.aws.neon.tech")).toBe("neon");
    });
    it("returns null for plain Postgres hosts", () => {
      expect(detectProviderFromHost("localhost")).toBeNull();
      expect(detectProviderFromHost("prod.example.com")).toBeNull();
    });
  });

describe("detectProviderFromHost", () => {
  it("detects PlanetScale access hosts", () => {
    expect(detectProviderFromHost("xxxx.us-east-2.psdb.cloud")).toBe("planetscale");
    expect(detectProviderFromHost("aws.connect.psdb.cloud")).toBe("planetscale");
  });

  it("still detects supabase and neon", () => {
    expect(detectProviderFromHost("db.abc.supabase.co")).toBe("supabase");
    expect(detectProviderFromHost("ep-1-pooler.eu.aws.neon.tech")).toBe("neon");
    expect(detectProviderFromHost("example.com")).toBeNull();
  });
});

describe("buildConnectionUrl", () => {
  it("builds a PostgreSQL URL with password and sslmode", () => {
    const url = buildConnectionUrl(
      makeConn({ db_type: "postgresql", host: "prod.example.com", port: 5432, username: "alice", database: "app", ssl_mode: "require" }),
      "s3cret",
    );
    expect(url).toBe("postgresql://alice:s3cret@prod.example.com:5432/app?sslmode=require");
  });

  it("omits password when null (no-password variant)", () => {
    const url = buildConnectionUrl(
      makeConn({ db_type: "postgresql", host: "prod.example.com", port: 5432, username: "alice", database: "app" }),
      null,
    );
    expect(url).toBe("postgresql://alice@prod.example.com:5432/app");
  });

  it("omits sslmode when disable or unset", () => {
    expect(
      buildConnectionUrl(makeConn({ ssl_mode: "disable" }), null),
    ).toBe("postgresql://user@localhost:5432");
    expect(
      buildConnectionUrl(makeConn({ ssl_mode: undefined }), null),
    ).toBe("postgresql://user@localhost:5432");
  });

  it("percent-encodes special characters in user/password/database", () => {
    const url = buildConnectionUrl(
      makeConn({ username: "a b", database: "my db" }),
      "p@ss w:rd",
    );
    expect(url).toBe("postgresql://a%20b:p%40ss%20w%3Ard@localhost:5432/my%20db");
  });

  it("builds a MySQL URL", () => {
    const url = buildConnectionUrl(
      makeConn({ db_type: "mysql", host: "127.0.0.1", port: 3306, username: "root", database: "app" }),
      "pw",
    );
    expect(url).toBe("mysql://root:pw@127.0.0.1:3306/app");
  });

  it("emits mariadb:// for a mariadb connection", () => {
    const url = buildConnectionUrl(
      makeConn({ db_type: "mariadb", host: "127.0.0.1", port: 3306, username: "root", database: "app" }),
      "pw",
    );
    expect(url).toBe("mariadb://root:pw@127.0.0.1:3306/app");
  });

  it("omits the password in the mariadb no-password variant", () => {
    const url = buildConnectionUrl(
      makeConn({ db_type: "mariadb", host: "127.0.0.1", port: 3306, username: "root", database: "app" }),
      null,
    );
    expect(url).toBe("mariadb://root@127.0.0.1:3306/app");
  });

  it("builds a Redis URL with password but no username", () => {
    const url = buildConnectionUrl(
      makeConn({ db_type: "redis", host: "localhost", port: 6379, username: null, database: "0" }),
      "pw",
    );
    expect(url).toBe("redis://:pw@localhost:6379/0");
  });

  it("builds a SQLite URL from the host file path", () => {
    const url = buildConnectionUrl(
      makeConn({ db_type: "sqlite", host: "/Users/me/data.db", port: null, username: null, database: null }),
      null,
    );
    expect(url).toBe("sqlite:///Users/me/data.db");
  });

  it("round-trips through parseConnectionString", () => {
    const conn = makeConn({ db_type: "postgresql", host: "localhost", port: 5432, username: "user", database: "mydb" });
    const url = buildConnectionUrl(conn, "pass");
    expect(parseConnectionString(url)).toEqual({
      db_type: "postgresql",
      host: "localhost",
      port: 5432,
      username: "user",
      password: "pass",
      database: "mydb",
      ssl_mode: null,
    });
  });
});