package repository

import (
	"context"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"github.com/gochat/gochat/internal/model"
)

func TestUserRepo_Create(t *testing.T) {
	db := setupTestDB(t)
	repo := NewUserRepo(db)

	user := &model.User{
		AccountID: 1,
		Name:      "TestUser",
		Email:     "test@example.com",
		Password:  "hashedpassword",
		Provider:  "email",
		Role:      "agent",
		Active:    true,
	}

	err := repo.Create(context.Background(), user)
	assert.NoError(t, err)
	assert.NotZero(t, user.ID)
}

func TestUserRepo_FindByID(t *testing.T) {
	db := setupTestDB(t)
	repo := NewUserRepo(db)

	user := &model.User{
		AccountID: 1,
		Name:      "FindByIDUser",
		Email:     "findbyid@example.com",
		Password:  "hashedpassword",
		Provider:  "email",
		Role:      "agent",
		Active:    true,
	}
	require.NoError(t, db.Create(user).Error)

	found, err := repo.FindByID(context.Background(), user.ID)
	assert.NoError(t, err)
	assert.Equal(t, "FindByIDUser", found.Name)
	assert.Equal(t, user.ID, found.ID)
	assert.Equal(t, "findbyid@example.com", found.Email)
}

func TestUserRepo_FindByID_NotFound(t *testing.T) {
	db := setupTestDB(t)
	repo := NewUserRepo(db)

	found, err := repo.FindByID(context.Background(), 9999)
	assert.Error(t, err)
	assert.Nil(t, found)
}

func TestUserRepo_FindByEmail(t *testing.T) {
	db := setupTestDB(t)
	repo := NewUserRepo(db)

	user := &model.User{
		AccountID: 1,
		Name:      "EmailUser",
		Email:     "emailfind@example.com",
		Password:  "hashedpassword",
		Provider:  "email",
		Role:      "agent",
		Active:    true,
	}
	require.NoError(t, db.Create(user).Error)

	found, err := repo.FindByEmail(context.Background(), "emailfind@example.com")
	assert.NoError(t, err)
	assert.Equal(t, user.ID, found.ID)
	assert.Equal(t, "emailfind@example.com", found.Email)
}

func TestUserRepo_FindByEmail_NotFound(t *testing.T) {
	db := setupTestDB(t)
	repo := NewUserRepo(db)

	found, err := repo.FindByEmail(context.Background(), "nonexistent@example.com")
	assert.Error(t, err)
	assert.Nil(t, found)
}

func TestUserRepo_Update(t *testing.T) {
	db := setupTestDB(t)
	repo := NewUserRepo(db)

	user := &model.User{
		AccountID: 1,
		Name:      "OriginalName",
		Email:     "update@example.com",
		Password:  "hashedpassword",
		Provider:  "email",
		Role:      "agent",
		Active:    true,
	}
	require.NoError(t, db.Create(user).Error)

	user.Name = "UpdatedName"
	err := repo.Update(context.Background(), user)
	assert.NoError(t, err)

	found, err := repo.FindByID(context.Background(), user.ID)
	assert.NoError(t, err)
	assert.Equal(t, "UpdatedName", found.Name)
}

func TestUserRepo_Delete(t *testing.T) {
	db := setupTestDB(t)
	repo := NewUserRepo(db)

	user := &model.User{
		AccountID: 1,
		Name:      "DeleteUser",
		Email:     "delete@example.com",
		Password:  "hashedpassword",
		Provider:  "email",
		Role:      "agent",
		Active:    true,
	}
	require.NoError(t, db.Create(user).Error)

	err := repo.Delete(context.Background(), user.ID)
	assert.NoError(t, err)

	// After soft-delete, FindByID should return error
	found, err := repo.FindByID(context.Background(), user.ID)
	assert.Error(t, err)
	assert.Nil(t, found)
}

func TestUserRepo_List(t *testing.T) {
	db := setupTestDB(t)
	repo := NewUserRepo(db)

	for i := 0; i < 5; i++ {
		user := &model.User{
			AccountID: 1,
			Name:      "ListUser" + string(rune('A'+i)),
			Email:     "list" + string(rune('A'+i)) + "@example.com",
			Password:  "hashedpassword",
			Provider:  "email",
			Role:      "agent",
			Active:    true,
		}
		require.NoError(t, db.Create(user).Error)
	}

	users, total, err := repo.List(context.Background(), 0, 10)
	assert.NoError(t, err)
	assert.Equal(t, int64(5), total)
	assert.Len(t, users, 5)
}

func TestUserRepo_List_Pagination(t *testing.T) {
	db := setupTestDB(t)
	repo := NewUserRepo(db)

	for i := 0; i < 10; i++ {
		user := &model.User{
			AccountID: 1,
			Name:      "PagUser",
			Email:     "pag" + string(rune('A'+i)) + "@example.com",
			Password:  "hashedpassword",
			Provider:  "email",
			Role:      "agent",
			Active:    true,
		}
		require.NoError(t, db.Create(user).Error)
	}

	users, total, err := repo.List(context.Background(), 5, 3)
	assert.NoError(t, err)
	assert.Equal(t, int64(10), total)
	assert.Len(t, users, 3)
}

func TestUserRepo_List_Empty(t *testing.T) {
	db := setupTestDB(t)
	repo := NewUserRepo(db)

	users, total, err := repo.List(context.Background(), 0, 10)
	assert.NoError(t, err)
	assert.Equal(t, int64(0), total)
	assert.Len(t, users, 0)
}

func TestUserRepo_Count(t *testing.T) {
	db := setupTestDB(t)
	repo := NewUserRepo(db)

	for i := 0; i < 3; i++ {
		user := &model.User{
			AccountID: 1,
			Name:      "CountUser",
			Email:     "count" + string(rune('A'+i)) + "@example.com",
			Password:  "hashedpassword",
			Provider:  "email",
			Role:      "agent",
			Active:    true,
		}
		require.NoError(t, db.Create(user).Error)
	}

	total, err := repo.Count(context.Background())
	assert.NoError(t, err)
	assert.Equal(t, int64(3), total)
}

func TestUserRepo_UpdateAvailability(t *testing.T) {
	db := setupTestDB(t)
	repo := NewUserRepo(db)

	user := &model.User{
		AccountID: 1,
		Name:      "AvailUser",
		Email:     "avail@example.com",
		Password:  "hashedpassword",
		Provider:  "email",
		Role:      "agent",
		Active:    true,
		Available: false,
	}
	require.NoError(t, db.Create(user).Error)

	err := repo.UpdateAvailability(context.Background(), user.ID, "online")
	assert.NoError(t, err)

	found, err := repo.FindByID(context.Background(), user.ID)
	assert.NoError(t, err)
	// Availability is stored in AccountUser, not User directly in GoChat
	// The repo method updates the users table availability column
	assert.Equal(t, user.ID, found.ID)
}

// Search uses ILIKE which SQLite does not support; skip when running SQLite
func TestUserRepo_Search(t *testing.T) {
	skipIfSQLite(t)
	db := setupTestDB(t)
	repo := NewUserRepo(db)

	for i := 0; i < 3; i++ {
		user := &model.User{
			AccountID: 1,
			Name:      "SearchUser" + string(rune('A'+i)),
			Email:     "search" + string(rune('A'+i)) + "@example.com",
			Password:  "hashedpassword",
			Provider:  "email",
			Role:      "agent",
			Active:    true,
		}
		require.NoError(t, db.Create(user).Error)
	}

	// Search by name
	users, total, err := repo.Search(context.Background(), "SearchUserA", 0, 10)
	assert.NoError(t, err)
	assert.Equal(t, int64(1), total)
	assert.Len(t, users, 1)
	assert.Equal(t, "SearchUserA", users[0].Name)

	// Search by email
	users, total, err = repo.Search(context.Background(), "searchB", 0, 10)
	assert.NoError(t, err)
	assert.Equal(t, int64(1), total)
	assert.Len(t, users, 1)
}