package integration

import (
	"context"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"github.com/testcontainers/testcontainers-go"
	testcontainers_postgres "github.com/testcontainers/testcontainers-go/modules/postgres"
	"github.com/testcontainers/testcontainers-go/wait"
	"gorm.io/driver/postgres"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"

	"github.com/break/junhong_cmp_fiber/internal/model"
	roleService "github.com/break/junhong_cmp_fiber/internal/service/role"
	postgresStore "github.com/break/junhong_cmp_fiber/internal/store/postgres"
	"github.com/break/junhong_cmp_fiber/pkg/constants"
	"github.com/break/junhong_cmp_fiber/pkg/middleware"
)

// TestRolePermissionAssociation_AssignPermissions 测试角色权限分配功能
func TestRolePermissionAssociation_AssignPermissions(t *testing.T) {
	ctx := context.Background()

	// 启动 PostgreSQL 容器
	pgContainer, err := testcontainers_postgres.RunContainer(ctx,
		testcontainers.WithImage("postgres:14-alpine"),
		testcontainers_postgres.WithDatabase("testdb"),
		testcontainers_postgres.WithUsername("postgres"),
		testcontainers_postgres.WithPassword("password"),
		testcontainers.WithWaitStrategy(
			wait.ForLog("database system is ready to accept connections").
				WithOccurrence(2).
				WithStartupTimeout(30*time.Second),
		),
	)
	require.NoError(t, err, "启动 PostgreSQL 容器失败")
	defer func() { _ = pgContainer.Terminate(ctx) }()

	pgConnStr, err := pgContainer.ConnectionString(ctx, "sslmode=disable")
	require.NoError(t, err)

	// 连接数据库
	db, err := gorm.Open(postgres.Open(pgConnStr), &gorm.Config{
		Logger: logger.Default.LogMode(logger.Silent),
	})
	require.NoError(t, err)

	// 自动迁移
	err = db.AutoMigrate(
		&model.Role{},
		&model.Permission{},
		&model.RolePermission{},
	)
	require.NoError(t, err)

	// 初始化 Store 和 Service
	roleStore := postgresStore.NewRoleStore(db)
	permStore := postgresStore.NewPermissionStore(db)
	rolePermStore := postgresStore.NewRolePermissionStore(db)
	roleSvc := roleService.New(roleStore, permStore, rolePermStore)

	// 创建测试用户上下文
	userCtx := middleware.SetUserContext(ctx, 1, constants.UserTypeSuperAdmin, 0)

	t.Run("成功分配单个权限", func(t *testing.T) {
		// 创建测试角色
		role := &model.Role{
			RoleName: "单权限测试角色",
			RoleType: constants.RoleTypeSuper,
			Status:   constants.StatusEnabled,
		}
		db.Create(role)

		// 创建测试权限
		perm := &model.Permission{
			PermName: "单权限测试",
			PermCode: "single:perm:test",
			PermType: constants.PermissionTypeMenu,
			Status:   constants.StatusEnabled,
		}
		db.Create(perm)

		// 分配权限
		rps, err := roleSvc.AssignPermissions(userCtx, role.ID, []uint{perm.ID})
		require.NoError(t, err)
		assert.Len(t, rps, 1)
		assert.Equal(t, role.ID, rps[0].RoleID)
		assert.Equal(t, perm.ID, rps[0].PermID)
	})

	t.Run("成功分配多个权限", func(t *testing.T) {
		// 创建测试角色
		role := &model.Role{
			RoleName: "多权限测试角色",
			RoleType: constants.RoleTypeSuper,
			Status:   constants.StatusEnabled,
		}
		db.Create(role)

		// 创建多个测试权限
		permIDs := make([]uint, 3)
		for i := 0; i < 3; i++ {
			perm := &model.Permission{
				PermName: "多权限测试_" + string(rune('A'+i)),
				PermCode: "multi:perm:test:" + string(rune('a'+i)),
				PermType: constants.PermissionTypeMenu,
				Status:   constants.StatusEnabled,
			}
			db.Create(perm)
			permIDs[i] = perm.ID
		}

		// 分配权限
		rps, err := roleSvc.AssignPermissions(userCtx, role.ID, permIDs)
		require.NoError(t, err)
		assert.Len(t, rps, 3)
	})

	t.Run("获取角色的权限列表", func(t *testing.T) {
		// 创建测试角色
		role := &model.Role{
			RoleName: "获取权限列表测试角色",
			RoleType: constants.RoleTypeSuper,
			Status:   constants.StatusEnabled,
		}
		db.Create(role)

		// 创建并分配权限
		perm := &model.Permission{
			PermName: "获取权限列表测试",
			PermCode: "get:perm:list:test",
			PermType: constants.PermissionTypeMenu,
			Status:   constants.StatusEnabled,
		}
		db.Create(perm)

		_, err := roleSvc.AssignPermissions(userCtx, role.ID, []uint{perm.ID})
		require.NoError(t, err)

		// 获取权限列表
		perms, err := roleSvc.GetPermissions(userCtx, role.ID)
		require.NoError(t, err)
		assert.Len(t, perms, 1)
		assert.Equal(t, perm.ID, perms[0].ID)
	})

	t.Run("移除角色的权限", func(t *testing.T) {
		// 创建测试角色
		role := &model.Role{
			RoleName: "移除权限测试角色",
			RoleType: constants.RoleTypeSuper,
			Status:   constants.StatusEnabled,
		}
		db.Create(role)

		// 创建并分配权限
		perm := &model.Permission{
			PermName: "移除权限测试",
			PermCode: "remove:perm:test",
			PermType: constants.PermissionTypeMenu,
			Status:   constants.StatusEnabled,
		}
		db.Create(perm)

		_, err := roleSvc.AssignPermissions(userCtx, role.ID, []uint{perm.ID})
		require.NoError(t, err)

		// 移除权限
		err = roleSvc.RemovePermission(userCtx, role.ID, perm.ID)
		require.NoError(t, err)

		// 验证权限已被软删除
		var rp model.RolePermission
		err = db.Unscoped().Where("role_id = ? AND perm_id = ?", role.ID, perm.ID).First(&rp).Error
		require.NoError(t, err)
		assert.NotNil(t, rp.DeletedAt)
	})

	t.Run("重复分配权限不会创建重复记录", func(t *testing.T) {
		// 创建测试角色
		role := &model.Role{
			RoleName: "重复权限测试角色",
			RoleType: constants.RoleTypeSuper,
			Status:   constants.StatusEnabled,
		}
		db.Create(role)

		// 创建测试权限
		perm := &model.Permission{
			PermName: "重复权限测试",
			PermCode: "duplicate:perm:test",
			PermType: constants.PermissionTypeMenu,
			Status:   constants.StatusEnabled,
		}
		db.Create(perm)

		// 第一次分配
		_, err := roleSvc.AssignPermissions(userCtx, role.ID, []uint{perm.ID})
		require.NoError(t, err)

		// 第二次分配相同权限
		_, err = roleSvc.AssignPermissions(userCtx, role.ID, []uint{perm.ID})
		require.NoError(t, err)

		// 验证只有一条记录
		var count int64
		db.Model(&model.RolePermission{}).Where("role_id = ? AND perm_id = ?", role.ID, perm.ID).Count(&count)
		assert.Equal(t, int64(1), count)
	})

	t.Run("角色不存在时分配权限失败", func(t *testing.T) {
		perm := &model.Permission{
			PermName: "角色不存在测试",
			PermCode: "role:not:exist:test",
			PermType: constants.PermissionTypeMenu,
			Status:   constants.StatusEnabled,
		}
		db.Create(perm)

		_, err := roleSvc.AssignPermissions(userCtx, 99999, []uint{perm.ID})
		assert.Error(t, err)
	})

	t.Run("权限不存在时分配失败", func(t *testing.T) {
		role := &model.Role{
			RoleName: "权限不存在测试角色",
			RoleType: constants.RoleTypeSuper,
			Status:   constants.StatusEnabled,
		}
		db.Create(role)

		_, err := roleSvc.AssignPermissions(userCtx, role.ID, []uint{99999})
		assert.Error(t, err)
	})
}

// TestRolePermissionAssociation_SoftDelete 测试软删除对角色权限关联的影响
func TestRolePermissionAssociation_SoftDelete(t *testing.T) {
	ctx := context.Background()

	// 启动容器
	pgContainer, err := testcontainers_postgres.RunContainer(ctx,
		testcontainers.WithImage("postgres:14-alpine"),
		testcontainers_postgres.WithDatabase("testdb"),
		testcontainers_postgres.WithUsername("postgres"),
		testcontainers_postgres.WithPassword("password"),
		testcontainers.WithWaitStrategy(
			wait.ForLog("database system is ready to accept connections").
				WithOccurrence(2).
				WithStartupTimeout(30*time.Second),
		),
	)
	require.NoError(t, err)
	defer func() { _ = pgContainer.Terminate(ctx) }()

	pgConnStr, _ := pgContainer.ConnectionString(ctx, "sslmode=disable")

	// 设置环境
	db, _ := gorm.Open(postgres.Open(pgConnStr), &gorm.Config{
		Logger: logger.Default.LogMode(logger.Silent),
	})
	_ = db.AutoMigrate(&model.Role{}, &model.Permission{}, &model.RolePermission{})

	roleStore := postgresStore.NewRoleStore(db)
	permStore := postgresStore.NewPermissionStore(db)
	rolePermStore := postgresStore.NewRolePermissionStore(db)
	roleSvc := roleService.New(roleStore, permStore, rolePermStore)

	userCtx := middleware.SetUserContext(ctx, 1, constants.UserTypeSuperAdmin, 0)

	t.Run("软删除权限后重新分配可以恢复", func(t *testing.T) {
		// 创建测试数据
		role := &model.Role{
			RoleName: "恢复权限测试角色",
			RoleType: constants.RoleTypeSuper,
			Status:   constants.StatusEnabled,
		}
		db.Create(role)

		perm := &model.Permission{
			PermName: "恢复权限测试",
			PermCode: "restore:perm:test",
			PermType: constants.PermissionTypeMenu,
			Status:   constants.StatusEnabled,
		}
		db.Create(perm)

		// 分配权限
		_, err := roleSvc.AssignPermissions(userCtx, role.ID, []uint{perm.ID})
		require.NoError(t, err)

		// 移除权限
		err = roleSvc.RemovePermission(userCtx, role.ID, perm.ID)
		require.NoError(t, err)

		// 重新分配权限
		rps, err := roleSvc.AssignPermissions(userCtx, role.ID, []uint{perm.ID})
		require.NoError(t, err)
		assert.Len(t, rps, 1)

		// 验证关联已恢复
		perms, err := roleSvc.GetPermissions(userCtx, role.ID)
		require.NoError(t, err)
		assert.Len(t, perms, 1)
	})

	t.Run("批量分配和移除权限", func(t *testing.T) {
		// 创建测试角色
		role := &model.Role{
			RoleName: "批量权限测试角色",
			RoleType: constants.RoleTypeSuper,
			Status:   constants.StatusEnabled,
		}
		db.Create(role)

		// 创建多个权限
		permIDs := make([]uint, 5)
		for i := 0; i < 5; i++ {
			perm := &model.Permission{
				PermName: "批量权限测试_" + string(rune('A'+i)),
				PermCode: "batch:perm:test:" + string(rune('a'+i)),
				PermType: constants.PermissionTypeMenu,
				Status:   constants.StatusEnabled,
			}
			db.Create(perm)
			permIDs[i] = perm.ID
		}

		// 批量分配
		_, err := roleSvc.AssignPermissions(userCtx, role.ID, permIDs)
		require.NoError(t, err)

		// 验证分配成功
		perms, err := roleSvc.GetPermissions(userCtx, role.ID)
		require.NoError(t, err)
		assert.Len(t, perms, 5)

		// 移除部分权限
		for i := 0; i < 3; i++ {
			err = roleSvc.RemovePermission(userCtx, role.ID, permIDs[i])
			require.NoError(t, err)
		}

		// 验证剩余权限
		perms, err = roleSvc.GetPermissions(userCtx, role.ID)
		require.NoError(t, err)
		assert.Len(t, perms, 2)
	})
}

// TestRolePermissionAssociation_Cascade 测试级联行为
func TestRolePermissionAssociation_Cascade(t *testing.T) {
	ctx := context.Background()

	// 启动容器
	pgContainer, err := testcontainers_postgres.RunContainer(ctx,
		testcontainers.WithImage("postgres:14-alpine"),
		testcontainers_postgres.WithDatabase("testdb"),
		testcontainers_postgres.WithUsername("postgres"),
		testcontainers_postgres.WithPassword("password"),
		testcontainers.WithWaitStrategy(
			wait.ForLog("database system is ready to accept connections").
				WithOccurrence(2).
				WithStartupTimeout(30*time.Second),
		),
	)
	require.NoError(t, err)
	defer func() { _ = pgContainer.Terminate(ctx) }()

	pgConnStr, _ := pgContainer.ConnectionString(ctx, "sslmode=disable")

	// 设置环境
	db, _ := gorm.Open(postgres.Open(pgConnStr), &gorm.Config{
		Logger: logger.Default.LogMode(logger.Silent),
	})
	_ = db.AutoMigrate(&model.Role{}, &model.Permission{}, &model.RolePermission{})

	t.Run("验证无外键约束（关联表独立）", func(t *testing.T) {
		// 创建角色和权限
		role := &model.Role{
			RoleName: "级联测试角色",
			RoleType: constants.RoleTypeSuper,
			Status:   constants.StatusEnabled,
		}
		db.Create(role)

		perm := &model.Permission{
			PermName: "级联测试权限",
			PermCode: "cascade:test:perm",
			PermType: constants.PermissionTypeMenu,
			Status:   constants.StatusEnabled,
		}
		db.Create(perm)

		// 创建关联
		rp := &model.RolePermission{
			RoleID: role.ID,
			PermID: perm.ID,
			Status: constants.StatusEnabled,
		}
		db.Create(rp)

		// 删除角色（软删除）
		db.Delete(role)

		// 验证关联记录仍然存在（无外键约束）
		var count int64
		db.Model(&model.RolePermission{}).Where("role_id = ?", role.ID).Count(&count)
		assert.Equal(t, int64(1), count, "关联记录应该仍然存在，因为没有外键约束")

		// 验证可以独立查询关联记录
		var rpRecord model.RolePermission
		err := db.Where("role_id = ? AND perm_id = ?", role.ID, perm.ID).First(&rpRecord).Error
		assert.NoError(t, err, "应该能查询到关联记录")
	})
}