package jwt

import (
	"context"
	"testing"

	"github.com/DATA-DOG/go-sqlmock"
	"github.com/stretchr/testify/require"
)

func TestCreateGenerator_Success_NoDB(t *testing.T) {
	gen, err := CreateGenerator(GeneratorConfig{
		AccessExpireAfter:  15,
		RefreshExpireAfter: 60,
		FreshExpireAfter:   5,
		TrustedHost:        "example.com",
		SecretKey:          "secret",
		DB:                 nil,
		DBType:             DatabaseType{Type: DatabasePostgreSQL, Version: "15"},
		TableConfig:        DefaultTableConfig(),
	})

	require.NoError(t, err)
	require.NotNil(t, gen)
}

func TestCreateGenerator_Success_WithDB(t *testing.T) {
	db, mock, err := sqlmock.New()
	require.NoError(t, err)
	defer db.Close()

	config := DefaultTableConfig()
	config.AutoCreate = false
	config.EnableAutoCleanup = false

	gen, err := CreateGenerator(GeneratorConfig{
		AccessExpireAfter:  15,
		RefreshExpireAfter: 60,
		FreshExpireAfter:   5,
		TrustedHost:        "example.com",
		SecretKey:          "secret",
		DB:                 db,
		DBType:             DatabaseType{Type: DatabasePostgreSQL, Version: "15"},
		TableConfig:        config,
	})

	require.NoError(t, err)
	require.NotNil(t, gen)
	require.NoError(t, mock.ExpectationsWereMet())
}

func TestCreateGenerator_WithDB_AutoCreate(t *testing.T) {
	db, mock, err := sqlmock.New()
	require.NoError(t, err)
	defer db.Close()

	// Mock table doesn't exist
	mock.ExpectQuery("SELECT 1 FROM information_schema.tables").
		WithArgs("jwtblacklist").
		WillReturnRows(sqlmock.NewRows([]string{"1"}))

	// Mock CREATE TABLE
	mock.ExpectExec("CREATE TABLE IF NOT EXISTS jwtblacklist").
		WillReturnResult(sqlmock.NewResult(0, 0))

	// Mock cleanup function creation
	mock.ExpectExec("CREATE OR REPLACE FUNCTION cleanup_jwtblacklist").
		WillReturnResult(sqlmock.NewResult(0, 0))

	gen, err := CreateGenerator(GeneratorConfig{
		AccessExpireAfter:  15,
		RefreshExpireAfter: 60,
		FreshExpireAfter:   5,
		TrustedHost:        "example.com",
		SecretKey:          "secret",
		DB:                 db,
		DBType:             DatabaseType{Type: DatabasePostgreSQL, Version: "15"},
		TableConfig:        DefaultTableConfig(),
	})

	require.NoError(t, err)
	require.NotNil(t, gen)
	require.NoError(t, mock.ExpectationsWereMet())
}

func TestCreateGenerator_InvalidInputs(t *testing.T) {
	tests := []struct {
		name   string
		config GeneratorConfig
	}{
		{
			"access expiry <= 0",
			GeneratorConfig{
				AccessExpireAfter:  0,
				RefreshExpireAfter: 1,
				FreshExpireAfter:   1,
				TrustedHost:        "h",
				SecretKey:          "s",
			},
		},
		{
			"refresh expiry <= 0",
			GeneratorConfig{
				AccessExpireAfter:  1,
				RefreshExpireAfter: 0,
				FreshExpireAfter:   1,
				TrustedHost:        "h",
				SecretKey:          "s",
			},
		},
		{
			"fresh expiry <= 0",
			GeneratorConfig{
				AccessExpireAfter:  1,
				RefreshExpireAfter: 1,
				FreshExpireAfter:   0,
				TrustedHost:        "h",
				SecretKey:          "s",
			},
		},
		{
			"empty trustedHost",
			GeneratorConfig{
				AccessExpireAfter:  1,
				RefreshExpireAfter: 1,
				FreshExpireAfter:   1,
				TrustedHost:        "",
				SecretKey:          "s",
			},
		},
		{
			"empty secretKey",
			GeneratorConfig{
				AccessExpireAfter:  1,
				RefreshExpireAfter: 1,
				FreshExpireAfter:   1,
				TrustedHost:        "h",
				SecretKey:          "",
			},
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			_, err := CreateGenerator(tt.config)
			require.Error(t, err)
		})
	}
}

func TestCleanup_NoDB(t *testing.T) {
	gen, err := CreateGenerator(GeneratorConfig{
		AccessExpireAfter:  15,
		RefreshExpireAfter: 60,
		FreshExpireAfter:   5,
		TrustedHost:        "example.com",
		SecretKey:          "secret",
		DB:                 nil,
		DBType:             DatabaseType{Type: DatabasePostgreSQL, Version: "15"},
		TableConfig:        DefaultTableConfig(),
	})
	require.NoError(t, err)

	err = gen.Cleanup(context.Background())
	require.Error(t, err)
	require.Contains(t, err.Error(), "No DB provided")
}

func TestCleanup_Success(t *testing.T) {
	db, mock, err := sqlmock.New()
	require.NoError(t, err)
	defer db.Close()

	config := DefaultTableConfig()
	config.AutoCreate = false
	config.EnableAutoCleanup = false

	gen, err := CreateGenerator(GeneratorConfig{
		AccessExpireAfter:  15,
		RefreshExpireAfter: 60,
		FreshExpireAfter:   5,
		TrustedHost:        "example.com",
		SecretKey:          "secret",
		DB:                 db,
		DBType:             DatabaseType{Type: DatabasePostgreSQL, Version: "15"},
		TableConfig:        config,
	})
	require.NoError(t, err)

	// Mock DELETE query
	mock.ExpectExec("DELETE FROM jwtblacklist WHERE exp").
		WillReturnResult(sqlmock.NewResult(0, 5))

	err = gen.Cleanup(context.Background())
	require.NoError(t, err)
	require.NoError(t, mock.ExpectationsWereMet())
}