//go:build e2e

package e2e

import (
	"encoding/json"
	"fmt"
	"net/http"
	"os"
	"testing"

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

func TestPermission_Catalog(t *testing.T) {
	e2eStep(t, "P-01", "GET", "/api/v1/permissions/catalog", "讀全平台 Permission Catalog 樹狀結構")
	c := NewClient(t)
	env := c.DoExpectOK(t, http.MethodGet, "/api/v1/permissions/catalog?tree=true", nil, true)
	var data struct {
		Tree []map[string]any `json:"tree"`
	}
	require.NoError(t, json.Unmarshal(env.Data, &data))
	require.NotEmpty(t, data.Tree)
}

func TestPermission_Me(t *testing.T) {
	e2eStep(t, "P-02", "GET", "/api/v1/permissions/me", "讀當前 user 的角色 + 權限樹")
	c := NewClient(t)
	env := c.DoExpectOK(t, http.MethodGet, "/api/v1/permissions/me?include_tree=true", nil, true)
	var data struct {
		UID         string            `json:"uid"`
		TenantID    string            `json:"tenant_id"`
		Roles       []string          `json:"roles"`
		Permissions map[string]string `json:"permissions"`
		Tree        []map[string]any  `json:"tree"`
	}
	require.NoError(t, json.Unmarshal(env.Data, &data))
	require.Equal(t, c.Fixture.UID, data.UID)
	require.Equal(t, c.Fixture.TenantID, data.TenantID)
	require.Contains(t, data.Roles, c.Fixture.RoleKey)
	require.NotEmpty(t, data.Permissions)
}

func TestPermission_RoleCRUD(t *testing.T) {
	e2eStep(t, "P-03~P-06", "*", "/api/v1/permissions/roles", "租戶角色 CRUD：建立 → 列表 → 更新 display_name → 刪除")
	c := NewClient(t)

	createEnv := c.DoExpectOK(t, http.MethodPost, "/api/v1/permissions/roles", map[string]string{
		"key":          "e2e_custom_role",
		"display_name": "E2E Custom",
		"status":       "open",
	}, true)
	var role struct {
		ID  string `json:"id"`
		Key string `json:"key"`
	}
	require.NoError(t, json.Unmarshal(createEnv.Data, &role))
	require.Equal(t, "e2e_custom_role", role.Key)
	require.NotEmpty(t, role.ID)
	// 避免 e2e-up 反覆跑時 role 殘留 → 後續 Create 撞 unique key
	t.Cleanup(func() { _, _ = c.Do(t, http.MethodDelete, "/api/v1/permissions/roles/"+role.ID, nil, true) })

	listEnv := c.DoExpectOK(t, http.MethodGet, "/api/v1/permissions/roles", nil, true)
	var list struct {
		Roles []struct {
			Key string `json:"key"`
		} `json:"roles"`
	}
	require.NoError(t, json.Unmarshal(listEnv.Data, &list))
	found := false
	for _, r := range list.Roles {
		if r.Key == "e2e_custom_role" {
			found = true
			break
		}
	}
	require.True(t, found, "created role should appear in list")

	patchEnv := c.DoExpectOK(t, http.MethodPatch, "/api/v1/permissions/roles/"+role.ID, map[string]string{
		"display_name": "E2E Custom Renamed",
	}, true)
	var patched struct {
		DisplayName string `json:"display_name"`
	}
	require.NoError(t, json.Unmarshal(patchEnv.Data, &patched))
	require.Equal(t, "E2E Custom Renamed", patched.DisplayName)

	c.DoExpectOK(t, http.MethodDelete, "/api/v1/permissions/roles/"+role.ID, nil, true)
}

func TestPermission_RolePermissions(t *testing.T) {
	e2eStep(t, "P-07/P-08", "PUT/GET", "/api/v1/permissions/roles/:id/permissions", "Role 全量替換 Permission（含 parent closure），再讀回比對")
	c := NewClient(t)
	permissionID := firstCatalogPermissionID(t, c)

	createEnv := c.DoExpectOK(t, http.MethodPost, "/api/v1/permissions/roles", map[string]string{
		"key":          "e2e_role_permissions",
		"display_name": "E2E Role Permissions",
	}, true)
	var role struct {
		ID string `json:"id"`
	}
	require.NoError(t, json.Unmarshal(createEnv.Data, &role))
	require.NotEmpty(t, role.ID)
	t.Cleanup(func() { _, _ = c.Do(t, http.MethodDelete, "/api/v1/permissions/roles/"+role.ID, nil, true) })

	c.DoExpectOK(t, http.MethodPut, "/api/v1/permissions/roles/"+role.ID+"/permissions", map[string][]string{
		"permission_ids": {permissionID},
	}, true)

	listEnv := c.DoExpectOK(t, http.MethodGet, "/api/v1/permissions/roles/"+role.ID+"/permissions", nil, true)
	var list struct {
		Permissions []struct {
			ID string `json:"id"`
		} `json:"permissions"`
	}
	require.NoError(t, json.Unmarshal(listEnv.Data, &list))
	require.NotEmpty(t, list.Permissions)
	found := false
	for _, p := range list.Permissions {
		if p.ID == permissionID {
			found = true
			break
		}
	}
	require.True(t, found, "role should include requested permission")

	c.DoExpectOK(t, http.MethodDelete, "/api/v1/permissions/roles/"+role.ID, nil, true)
}

func TestPermission_AssignUserRole(t *testing.T) {
	e2eStep(t, "P-09~P-11", "*", "/api/v1/permissions/users/:uid/roles", "User ↔ Role 指派 / 列表 / 撤銷")
	c := NewClient(t)

	createEnv := c.DoExpectOK(t, http.MethodPost, "/api/v1/permissions/roles", map[string]string{
		"key":          "e2e_assign_role",
		"display_name": "E2E Assign",
	}, true)
	var role struct {
		ID string `json:"id"`
	}
	require.NoError(t, json.Unmarshal(createEnv.Data, &role))
	t.Cleanup(func() {
		_, _ = c.Do(t, http.MethodDelete, "/api/v1/permissions/users/"+c.Fixture.UID+"/roles/"+role.ID, nil, true)
		_, _ = c.Do(t, http.MethodDelete, "/api/v1/permissions/roles/"+role.ID, nil, true)
	})

	c.DoExpectOK(t, http.MethodPost, "/api/v1/permissions/users/"+c.Fixture.UID+"/roles", map[string]string{
		"role_id": role.ID,
	}, true)

	listEnv := c.DoExpectOK(t, http.MethodGet, "/api/v1/permissions/users/"+c.Fixture.UID+"/roles", nil, true)
	var list struct {
		UserRoles []struct {
			RoleID string `json:"role_id"`
		} `json:"user_roles"`
	}
	require.NoError(t, json.Unmarshal(listEnv.Data, &list))
	found := false
	for _, r := range list.UserRoles {
		if r.RoleID == role.ID {
			found = true
			break
		}
	}
	require.True(t, found)

	c.DoExpectOK(t, http.MethodDelete, "/api/v1/permissions/users/"+c.Fixture.UID+"/roles/"+role.ID, nil, true)
	c.DoExpectOK(t, http.MethodDelete, "/api/v1/permissions/roles/"+role.ID, nil, true)
}

func TestPermission_RoleMappingCRUD(t *testing.T) {
	e2eStep(t, "P-12", "*", "/api/v1/permissions/role-mappings", "外部 IdP group → 內部 Role.Key 對映 CRUD")
	c := NewClient(t)
	roleKey := "e2e_mapping_role"
	externalKey := fmt.Sprintf("e2e-group-%s", c.Fixture.UID)

	createEnv := c.DoExpectOK(t, http.MethodPost, "/api/v1/permissions/roles", map[string]string{
		"key":          roleKey,
		"display_name": "E2E Mapping Role",
	}, true)
	var role struct {
		ID string `json:"id"`
	}
	require.NoError(t, json.Unmarshal(createEnv.Data, &role))
	require.NotEmpty(t, role.ID)
	t.Cleanup(func() {
		_, _ = c.Do(t, http.MethodDelete, "/api/v1/permissions/role-mappings", map[string]string{
			"external_source": "zitadel",
			"external_key":    externalKey,
		}, true)
		_, _ = c.Do(t, http.MethodDelete, "/api/v1/permissions/roles/"+role.ID, nil, true)
	})

	upsertEnv := c.DoExpectOK(t, http.MethodPut, "/api/v1/permissions/role-mappings", map[string]string{
		"external_source":   "zitadel",
		"external_key":      externalKey,
		"internal_role_key": roleKey,
	}, true)
	var mapping struct {
		ID              string `json:"id"`
		ExternalSource  string `json:"external_source"`
		ExternalKey     string `json:"external_key"`
		InternalRoleID  string `json:"internal_role_id"`
		InternalRoleKey string `json:"internal_role_key"`
	}
	require.NoError(t, json.Unmarshal(upsertEnv.Data, &mapping))
	require.NotEmpty(t, mapping.ID)
	require.Equal(t, "zitadel", mapping.ExternalSource)
	require.Equal(t, externalKey, mapping.ExternalKey)
	require.Equal(t, role.ID, mapping.InternalRoleID)
	require.Equal(t, roleKey, mapping.InternalRoleKey)

	listEnv := c.DoExpectOK(t, http.MethodGet, "/api/v1/permissions/role-mappings?source=zitadel", nil, true)
	var list struct {
		Mappings []struct {
			ExternalKey string `json:"external_key"`
		} `json:"mappings"`
	}
	require.NoError(t, json.Unmarshal(listEnv.Data, &list))
	found := false
	for _, item := range list.Mappings {
		if item.ExternalKey == externalKey {
			found = true
			break
		}
	}
	require.True(t, found, "created role mapping should appear in list")

	c.DoExpectOK(t, http.MethodDelete, "/api/v1/permissions/role-mappings", map[string]string{
		"external_source": "zitadel",
		"external_key":    externalKey,
	}, true)
	c.DoExpectOK(t, http.MethodDelete, "/api/v1/permissions/roles/"+role.ID, nil, true)
}

func TestPermission_CasbinRBAC(t *testing.T) {
	e2eStep(t, "P-13/P-14", "*", "/api/v1/permissions/{policy/reload,roles}", "Casbin enforcement：owner reload policy → no-role user GET /roles=403")
	if os.Getenv("E2E_CASBIN") != "1" {
		t.Skip("set E2E_CASBIN=1 and use e2e.casbin.yaml to enable Casbin enforcement")
	}

	owner := NewClient(t)
	reloadEnv := owner.DoExpectOK(t, http.MethodPost, "/api/v1/permissions/policy/reload", nil, true)
	var reload struct {
		Tenant string `json:"tenant"`
		TS     int64  `json:"ts"`
	}
	require.NoError(t, json.Unmarshal(reloadEnv.Data, &reload))
	require.Equal(t, owner.Fixture.TenantID, reload.Tenant)
	require.Positive(t, reload.TS)

	noRole := NewNoRoleClient(t)
	denied := noRole.DoExpectHTTP(t, http.MethodGet, "/api/v1/permissions/roles", nil, true, http.StatusForbidden)
	require.NotEqual(t, int64(successCode), denied.Code)
}

func firstCatalogPermissionID(t *testing.T, c *Client) string {
	t.Helper()
	env := c.DoExpectOK(t, http.MethodGet, "/api/v1/permissions/catalog?tree=false", nil, true)
	var data struct {
		List []struct {
			ID string `json:"id"`
		} `json:"list"`
	}
	require.NoError(t, json.Unmarshal(env.Data, &data))
	require.NotEmpty(t, data.List)
	require.NotEmpty(t, data.List[0].ID)
	return data.List[0].ID
}