package source

import (
	"context"
	"io/ioutil"
	"runtime"
	"testing"

	"github.com/neilotoole/lg/testlg"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"github.com/neilotoole/sq/testh/proj"
	"github.com/neilotoole/sq/testh/sakila"
	"github.com/neilotoole/sq/testh/testsrc"
)

func TestFiles_Open(t *testing.T) {
	fs, err := NewFiles(testlg.New(t))
	require.NoError(t, err)
	t.Cleanup(func() { assert.NoError(t, fs.Close()) })

	src1 := &Source{
		Handle:   "@t1",
		Type:     typeXLSX,
		Location: proj.Abs(testsrc.PathXLSXTestHeader),
	}

	f, err := fs.openLocation(src1.Location)
	require.NoError(t, err)
	t.Cleanup(func() { assert.NoError(t, f.Close()) })
	require.Equal(t, src1.Location, f.Name())

	src2 := &Source{
		Handle:   "@t1",
		Type:     typeCSV,
		Location: sakila.URLActorCSV,
	}

	f2, err := fs.openLocation(src2.Location)
	require.NoError(t, err)
	t.Cleanup(func() { assert.NoError(t, f2.Close()) })

	b, err := ioutil.ReadAll(f2)
	require.NoError(t, err)
	require.Equal(t, proj.ReadFile(sakila.PathCSVActor), b)
}

func TestParseLoc(t *testing.T) {
	const (
		dbuser = "sakila"
		dbpass = "p_ssW0rd"
	)

	testCases := []struct {
		loc     string
		want    parsedLoc
		wantErr bool
		windows bool
	}{
		{loc: "/path/to/sakila.xlsx", want: parsedLoc{name: "sakila", ext: ".xlsx"}},
		{loc: "relative/path/to/sakila.xlsx", want: parsedLoc{name: "sakila", ext: ".xlsx"}},
		{loc: "./relative/path/to/sakila.xlsx", want: parsedLoc{name: "sakila", ext: ".xlsx"}},
		{loc: "https://server:8080/path/to/sakila.xlsx", want: parsedLoc{scheme: "https", hostname: "server", port: 8080, name: "sakila", ext: ".xlsx"}},
		{loc: "http://server/path/to/sakila.xlsx?param=val&param2=val2", want: parsedLoc{scheme: "http", hostname: "server", name: "sakila", ext: ".xlsx"}},
		{loc: "sqlite3:/path/to/sakila.db", wantErr: true}, // the scheme is malformed (should be "sqlite3://...")
		{loc: "sqlite3:///path/to/sakila.sqlite", want: parsedLoc{typ: typeSL3, scheme: "sqlite3", name: "sakila", ext: ".sqlite", dsn: "/path/to/sakila.sqlite"}},
		{loc: `sqlite3://C:\path\to\sakila.sqlite`, windows: true, want: parsedLoc{typ: typeSL3, scheme: "sqlite3", name: "sakila", ext: ".sqlite", dsn: `C:\path\to\sakila.sqlite`}},
		{loc: `sqlite3://C:\path\to\sakila.sqlite?param=val`, windows: true, want: parsedLoc{typ: typeSL3, scheme: "sqlite3", name: "sakila", ext: ".sqlite", dsn: `C:\path\to\sakila.sqlite?param=val`}},
		{loc: "sqlite3:///path/to/sakila", want: parsedLoc{typ: typeSL3, scheme: "sqlite3", name: "sakila", dsn: "/path/to/sakila"}},
		{loc: "sqlite3://path/to/sakila.db", want: parsedLoc{typ: typeSL3, scheme: "sqlite3", name: "sakila", ext: ".db", dsn: "path/to/sakila.db"}},
		{loc: "sqlite3:///path/to/sakila.db", want: parsedLoc{typ: typeSL3, scheme: "sqlite3", name: "sakila", ext: ".db", dsn: "/path/to/sakila.db"}},
		{loc: "sqlserver://sakila:p_ssW0rd@localhost?database=sakila", want: parsedLoc{typ: typeMS, scheme: "sqlserver", user: dbuser, pass: dbpass, hostname: "localhost", name: "sakila", dsn: "Password=p_ssW0rd;Server=localhost;User ID=sakila;database=sakila"}},
		{loc: "sqlserver://sakila:p_ssW0rd@server:1433?database=sakila", want: parsedLoc{typ: typeMS, scheme: "sqlserver", user: dbuser, pass: dbpass, hostname: "server", port: 1433, name: "sakila", dsn: "Password=p_ssW0rd;Port=1433;Server=server;User ID=sakila;database=sakila"}},
		{loc: "postgres://sakila:p_ssW0rd@localhost/sakila?sslmode=disable", want: parsedLoc{typ: typePg, scheme: "postgres", user: dbuser, pass: dbpass, hostname: "localhost", name: "sakila", dsn: "dbname=sakila host=localhost password=p_ssW0rd sslmode=disable user=sakila"}},
		{loc: "postgres://sakila:p_ssW0rd@server:5432/sakila?sslmode=disable", want: parsedLoc{typ: typePg, scheme: "postgres", user: dbuser, pass: dbpass, hostname: "server", port: 5432, name: "sakila", dsn: "dbname=sakila host=server password=p_ssW0rd port=5432 sslmode=disable user=sakila"}},
		{loc: "mysql://sakila:p_ssW0rd@localhost/sakila", want: parsedLoc{typ: typeMy, scheme: "mysql", user: dbuser, pass: dbpass, hostname: "localhost", name: "sakila", dsn: "sakila:p_ssW0rd@tcp(localhost:3306)/sakila"}},
		{loc: "mysql://sakila:p_ssW0rd@server:3306/sakila", want: parsedLoc{typ: typeMy, scheme: "mysql", user: dbuser, pass: dbpass, hostname: "server", port: 3306, name: "sakila", dsn: "sakila:p_ssW0rd@tcp(server:3306)/sakila"}},
	}

	for _, tc := range testCases {
		tc := tc
		t.Run(tc.loc, func(t *testing.T) {
			if tc.windows && runtime.GOOS != "windows" {
				return
			}

			tc.want.loc = tc.loc // set this here rather than verbosely in the setup
			got, gotErr := parseLoc(tc.loc)
			if tc.wantErr {
				require.Error(t, gotErr)
				require.Nil(t, got)
				return
			}

			require.NoError(t, gotErr)
			require.Equal(t, tc.want, *got)
		})
	}
}

// FilesDetectTypeFn exports Files.detectType for testing.
var FilesDetectTypeFn = func(fs *Files, ctx context.Context, loc string) (typ Type, ok bool, err error) {
	return fs.detectType(ctx, loc)
}