package bundb_test

import (
	"context"
	"testing"
	"time"

	"gitea.dwysokinski.me/twhelp/dcbot/internal/bundb"
	"gitea.dwysokinski.me/twhelp/dcbot/internal/bundb/internal/model"
	"gitea.dwysokinski.me/twhelp/dcbot/internal/domain"
	"github.com/google/uuid"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"github.com/uptrace/bun/dbfixture"
)

func TestGroup_Create(t *testing.T) {
	t.Parallel()

	repo := bundb.NewGroup(newDB(t))

	t.Run("OK", func(t *testing.T) {
		t.Parallel()

		params, err := domain.NewCreateGroupParams(
			"592292203234328587",
			"en",
			"en113",
			"1234",
			"1235",
		)
		require.NoError(t, err)

		group, err := repo.Create(context.Background(), params)
		assert.NoError(t, err)
		_, err = uuid.Parse(group.ID)
		assert.NoError(t, err)
		assert.Equal(t, params.ServerID(), group.ServerID)
		assert.Equal(t, params.ServerKey(), group.ServerKey)
		assert.Equal(t, params.VersionCode(), group.VersionCode)
		assert.Equal(t, params.ChannelGains(), group.ChannelGains)
		assert.Equal(t, params.ChannelLosses(), group.ChannelLosses)
		assert.WithinDuration(t, time.Now(), group.CreatedAt, 1*time.Second)
	})
}

func TestGroup_Update(t *testing.T) {
	t.Parallel()

	db := newDB(t)
	fixture := loadFixtures(t, db)
	repo := bundb.NewGroup(db)
	group := getGroupFromFixture(t, fixture, "group-1-server-1")

	t.Run("OK", func(t *testing.T) {
		t.Parallel()

		params := domain.UpdateGroupParams{
			ChannelGains: domain.NullString{
				String: group.ChannelGains + "update",
				Valid:  true,
			},
			ChannelLosses: domain.NullString{
				String: group.ChannelLosses + "update",
				Valid:  true,
			},
		}

		updatedGroup, err := repo.Update(context.Background(), group.ID.String(), group.ServerID, params)
		assert.NoError(t, err)
		assert.Equal(t, params.ChannelGains.String, updatedGroup.ChannelGains)
		assert.Equal(t, params.ChannelLosses.String, updatedGroup.ChannelLosses)
	})

	t.Run("ERR: nothing to update", func(t *testing.T) {
		t.Parallel()

		updatedGroup, err := repo.Update(context.Background(), "", "", domain.UpdateGroupParams{})
		assert.ErrorIs(t, err, domain.ErrNothingToUpdate)
		assert.Zero(t, updatedGroup)
	})

	t.Run("ERR: group not found", func(t *testing.T) {
		t.Parallel()

		tests := []struct {
			name     string
			id       string
			serverID string
		}{
			{
				name:     "ID - not UUID",
				id:       "test",
				serverID: group.ServerID,
			},
			{
				name:     "ID - random UUID",
				id:       uuid.NewString(),
				serverID: group.ServerID,
			},
			{
				name:     "ServerID - random UUID",
				id:       group.ID.String(),
				serverID: uuid.NewString(),
			},
		}

		for _, tt := range tests {
			tt := tt

			t.Run(tt.name, func(t *testing.T) {
				t.Parallel()

				updatedGroup, err := repo.Update(context.Background(), tt.id, tt.serverID, domain.UpdateGroupParams{
					ChannelGains: domain.NullString{
						String: "update",
						Valid:  true,
					},
				})
				assert.ErrorIs(t, err, domain.GroupNotFoundError{ID: tt.id})
				assert.Zero(t, updatedGroup)
			})
		}
	})
}

func TestGroup_List(t *testing.T) {
	t.Parallel()

	db := newDB(t)
	fixture := loadFixtures(t, db)
	repo := bundb.NewGroup(db)
	groups := getAllGroupsFromFixture(t, fixture)

	allGroups := make([]string, 0, len(groups))
	for _, g := range groups {
		allGroups = append(allGroups, g.ID.String())
	}

	tests := []struct {
		name           string
		params         domain.ListGroupsParams
		expectedGroups []string
	}{
		{
			name:           "no params",
			params:         domain.ListGroupsParams{},
			expectedGroups: allGroups,
		},
		{
			name: "ServerIDs=[server-1]",
			params: domain.ListGroupsParams{
				ServerIDs: []string{"server-1"},
			},
			expectedGroups: []string{
				"d56ad37f-2637-48ea-98f8-79627f3fcc96",
				"429b790e-7186-4106-b531-4cc4931ce2ba",
			},
		},
	}

	for _, tt := range tests {
		tt := tt

		t.Run(tt.name, func(t *testing.T) {
			t.Parallel()

			res, err := repo.List(context.Background(), tt.params)
			assert.NoError(t, err)
			assert.Len(t, res, len(tt.expectedGroups))
			for _, id := range tt.expectedGroups {
				found := false
				for _, grp := range res {
					if grp.ID == id {
						found = true
						break
					}
				}
				assert.True(t, found, "group (id=%s) not found", id)
			}
		})
	}
}

func TestGroup_Get(t *testing.T) {
	t.Parallel()

	db := newDB(t)
	fixture := loadFixtures(t, db)
	repo := bundb.NewGroup(db)
	group := getGroupFromFixture(t, fixture, "group-1-server-1")

	t.Run("OK", func(t *testing.T) {
		t.Parallel()

		g, err := repo.Get(context.Background(), group.ID.String(), group.ServerID)
		assert.NoError(t, err)
		assert.Equal(t, group.ToDomain(), g)
	})

	t.Run("ERR: group not found (unknown ID)", func(t *testing.T) {
		t.Parallel()

		tests := []struct {
			name     string
			id       string
			serverID string
		}{
			{
				name:     "ID - not UUID",
				id:       "test",
				serverID: group.ServerID,
			},
			{
				name:     "ID - random UUID",
				id:       uuid.NewString(),
				serverID: group.ServerID,
			},
			{
				name:     "ServerID - random UUID",
				id:       group.ID.String(),
				serverID: uuid.NewString(),
			},
		}

		for _, tt := range tests {
			tt := tt

			t.Run(tt.name, func(t *testing.T) {
				t.Parallel()

				g, err := repo.Get(context.Background(), tt.id, tt.serverID)
				assert.ErrorIs(t, err, domain.GroupNotFoundError{ID: tt.id})
				assert.Zero(t, g)
			})
		}
	})
}

func TestGroup_Delete(t *testing.T) {
	t.Parallel()

	db := newDB(t)
	fixture := loadFixtures(t, db)
	groupRepo := bundb.NewGroup(db)
	monitorRepo := bundb.NewMonitor(db)
	group := getGroupFromFixture(t, fixture, "group-1-server-1")

	t.Run("OK", func(t *testing.T) {
		t.Parallel()

		beforeDelete, err := groupRepo.List(context.Background(), domain.ListGroupsParams{
			ServerIDs: []string{group.ServerID},
		})
		assert.NoError(t, err)

		assert.NoError(t, groupRepo.Delete(context.Background(), group.ID.String(), group.ServerID))

		afterDelete, err := groupRepo.List(context.Background(), domain.ListGroupsParams{
			ServerIDs: []string{group.ServerID},
		})
		assert.NoError(t, err)
		assert.Len(t, afterDelete, len(beforeDelete)-1)

		// monitors should also be deleted
		monitors, err := monitorRepo.List(context.Background(), group.ID.String())
		assert.NoError(t, err)
		assert.Len(t, monitors, 0)
	})

	t.Run("ERR: group not found", func(t *testing.T) {
		t.Parallel()

		tests := []struct {
			name     string
			id       string
			serverID string
		}{
			{
				name:     "ID - not UUID",
				id:       "test",
				serverID: group.ServerID,
			},
			{
				name:     "ID - random UUID",
				id:       uuid.NewString(),
				serverID: group.ServerID,
			},
			{
				name:     "ServerID - random UUID",
				id:       group.ID.String(),
				serverID: uuid.NewString(),
			},
		}

		for _, tt := range tests {
			tt := tt

			t.Run(tt.name, func(t *testing.T) {
				t.Parallel()

				assert.ErrorIs(
					t,
					groupRepo.Delete(context.Background(), tt.id, tt.serverID),
					domain.GroupNotFoundError{ID: tt.id},
				)
			})
		}
	})
}

func getAllGroupsFromFixture(tb testing.TB, fixture *dbfixture.Fixture) []model.Group {
	tb.Helper()

	//nolint:lll
	ids := []string{"group-1-server-1", "group-2-server-1", "group-1-server-2", "group-2-server-2"}

	groups := make([]model.Group, 0, len(ids))
	for _, id := range ids {
		groups = append(groups, getGroupFromFixture(tb, fixture, id))
	}

	return groups
}

func getGroupFromFixture(tb testing.TB, fixture *dbfixture.Fixture, id string) model.Group {
	tb.Helper()

	row, err := fixture.Row("Group." + id)
	require.NoError(tb, err)
	g, ok := row.(*model.Group)
	require.True(tb, ok)
	return *g
}