package service

import (
	"context"
	"testing"

	"github.com/Tencent/WeKnora/internal/application/repository"
	"github.com/Tencent/WeKnora/internal/types"
	"github.com/Tencent/WeKnora/internal/types/interfaces"
	"github.com/stretchr/testify/require"
)

func TestGlobalInstructionSkillCanBeReadMountedButNotOverwrittenByOthers(t *testing.T) {
	s, alice := instructionHarness(t)
	bob := instructionContext(1, "bob", types.TenantRoleContributor)
	skill, err := s.Import(alice, "global.md", "", "", []byte("shared rules"))
	require.NoError(t, err)
	require.NoError(t, s.db.Model(&types.TenantSkillCatalogEntity{}).Where("id = ?", skill.ID).Update("visibility", "global").Error)
	view, err := s.Get(bob, skill.ID)
	require.NoError(t, err)
	require.Equal(t, "shared rules", view.Instructions)
	require.Equal(t, "global", view.Visibility)
	require.True(t, view.Enabled)
	list, err := s.List(bob)
	require.NoError(t, err)
	require.Len(t, list, 1)
	agent := types.CustomAgent{ID: "bob-agent", TenantID: 1, CreatedBy: "bob", Name: "Bob"}
	require.NoError(t, s.db.Create(&agent).Error)
	_, err = s.Mount(bob, InstructionSkillMountRequest{AgentIDs: []string{agent.ID}, SkillIDs: []string{skill.ID}})
	require.NoError(t, err)
	require.NoError(t, s.db.First(&agent, "id = ?", agent.ID).Error)
	prompt, err := s.ResolveAgentInstructions(bob, &agent)
	require.NoError(t, err)
	require.Contains(t, prompt, "shared rules")
	require.Error(t, s.Delete(bob, skill.ID, true))
	copy, err := s.Import(bob, "global.md", "", "", []byte("bob rules"))
	require.NoError(t, err)
	require.NotEqual(t, skill.ID, copy.ID)
	original, err := s.Get(alice, skill.ID)
	require.NoError(t, err)
	require.Equal(t, "shared rules", original.Instructions)
}

func TestInstructionLifecycleIsCheckedAtExecutionTime(t *testing.T) {
	s, alice := instructionHarness(t)
	bob := instructionContext(1, "bob", types.TenantRoleContributor)
	skill, err := s.Import(alice, "rules.md", "", "", []byte("sensitive rules"))
	require.NoError(t, err)
	agent := types.CustomAgent{ID: "shared-agent", TenantID: 1, CreatedBy: "alice", Name: "Shared", Visibility: "global", Enabled: true, Config: types.CustomAgentConfig{InstructionSkillIDs: []string{skill.ID}}}
	prompt, err := s.ResolveAgentInstructions(bob, &agent)
	require.NoError(t, err, "sharing an Agent includes execution of its owner's bound rules")
	require.Contains(t, prompt, "sensitive rules")
	_, err = s.Get(bob, skill.ID)
	require.Error(t, err, "Agent execution must not independently expose the private skill")
	require.NoError(t, s.db.Model(&types.TenantSkillCatalogEntity{}).Where("id = ?", skill.ID).Update("visibility", "global").Error)
	prompt, err = s.ResolveAgentInstructions(bob, &agent)
	require.NoError(t, err)
	require.Contains(t, prompt, "sensitive rules")
	require.NoError(t, s.db.Model(&types.TenantSkillCatalogEntity{}).Where("id = ?", skill.ID).Update("enabled", false).Error)
	for _, ctx := range []context.Context{alice, bob, instructionContext(1, "admin", types.TenantRoleAdmin)} {
		prompt, err = s.ResolveAgentInstructions(ctx, &agent)
		require.Error(t, err)
		require.Empty(t, prompt)
	}
	_, err = s.Get(bob, skill.ID)
	require.Error(t, err)
	list, err := s.List(bob)
	require.NoError(t, err)
	require.Empty(t, list)
	updated, err := s.Import(alice, "rules.md", "", "", []byte("revised rules"))
	require.NoError(t, err)
	require.False(t, updated.Enabled, "reimport must not reactivate a disabled skill")
	require.Equal(t, "global", updated.Visibility)
	agent.Config.InstructionSkillIDs = nil
	agent.Enabled = false
	_, err = s.ResolveAgentInstructions(alice, &agent)
	require.ErrorContains(t, err, "停用")
	agent.Enabled = true
	agent.Config.InstructionSkillIDs = []string{skill.ID}
	_, err = s.ResolveAgentInstructions(instructionContext(2, "admin", types.TenantRoleAdmin), &agent)
	require.ErrorContains(t, err, "跨工作空间")
}

func TestNativeOrganizationExecutionWithoutInstructionSkillsKeepsCompatibility(t *testing.T) {
	shared := &types.CustomAgent{ID: "shared", TenantID: 1, CreatedBy: "alice", Visibility: "private", Enabled: true}
	// The organization-sharing service verifies a share before handing this
	// Agent to QA. There are no instruction bodies to authorize or expose.
	prompt, err := ResolveAgentInstructionPrompt(instructionContext(2, "bob", types.TenantRoleContributor), nil, shared)
	require.NoError(t, err)
	require.Empty(t, prompt)
	shared.Enabled = false
	_, err = ResolveAgentInstructionPrompt(instructionContext(2, "bob", types.TenantRoleAdmin), nil, shared)
	require.ErrorContains(t, err, "停用")
}

func TestDisabledInstructionSkillCannotBeMounted(t *testing.T) {
	s, alice := instructionHarness(t)
	skill, err := s.Import(alice, "disabled.md", "", "", []byte("disabled rules"))
	require.NoError(t, err)
	require.NoError(t, s.db.Model(&types.TenantSkillCatalogEntity{}).Where("id = ?", skill.ID).Update("enabled", false).Error)
	require.NoError(t, s.db.Create(&types.CustomAgent{ID: "a", TenantID: 1, CreatedBy: "alice", Name: "A"}).Error)
	_, err = s.Mount(alice, InstructionSkillMountRequest{AgentIDs: []string{"a"}, SkillIDs: []string{skill.ID}})
	require.ErrorContains(t, err, "停用")
	require.NoError(t, s.db.Model(&types.CustomAgent{}).Where("id = ?", "a").Updates(map[string]any{"enabled": false, "config": types.CustomAgentConfig{InstructionSkillIDs: []string{skill.ID}}}).Error)
	_, err = s.Mount(alice, InstructionSkillMountRequest{AgentIDs: []string{"a"}, SkillIDs: []string{skill.ID}, Mode: "remove"})
	require.NoError(t, err, "owners must be able to repair disabled Agent bindings")
	var repaired types.CustomAgent
	require.NoError(t, s.db.First(&repaired, "id = ?", "a").Error)
	require.False(t, repaired.Enabled)
	require.Empty(t, repaired.Config.InstructionSkillIDs)
}

func TestDisabledBuiltinOverrideIsNotResurrected(t *testing.T) {
	ids := types.GetBuiltinAgentIDs()
	if len(ids) == 0 {
		t.Skip("no builtin registry configured")
	}
	id := ids[0]
	repo := &lifecycleAgentRepo{rows: map[string]*types.CustomAgent{id: {ID: id, TenantID: 1, IsBuiltin: true, Visibility: "global", Enabled: false}}}
	s := &customAgentService{repo: repo}
	bob := instructionContext(1, "bob", types.TenantRoleContributor)
	_, err := s.GetAgentByID(bob, id)
	require.ErrorIs(t, err, ErrAgentNotFound)
	list, err := s.ListAgents(bob)
	require.NoError(t, err)
	for _, a := range list {
		require.NotEqual(t, id, a.ID)
	}
	admin := instructionContext(1, "admin", types.TenantRoleAdmin)
	a, err := s.GetAgentByID(admin, id)
	require.NoError(t, err)
	_, err = ResolveAgentInstructionPrompt(admin, nil, a)
	require.ErrorContains(t, err, "停用")
}

func TestLifecycleCreateDefaultsPreserveExplicitDisabled(t *testing.T) {
	s, _ := instructionHarness(t)
	agent := types.CustomAgent{ID: "disabled", TenantID: 1, Name: "D", Visibility: "private", Enabled: false}
	require.NoError(t, s.db.Create(&agent).Error)
	var stored types.CustomAgent
	require.NoError(t, s.db.First(&stored, "id = ?", agent.ID).Error)
	require.False(t, stored.Enabled)
	legacy := types.CustomAgent{ID: "legacy", TenantID: 1, Name: "L"}
	require.NoError(t, s.db.Create(&legacy).Error)
	require.True(t, legacy.Enabled)
	require.Equal(t, "global", legacy.Visibility)
	skill := types.TenantSkillCatalogEntity{ID: "disabled-skill", TenantID: 1, Name: "D", InstructionOnly: true, Visibility: "private", Enabled: false}
	require.NoError(t, s.db.Create(&skill).Error)
	var storedSkill types.TenantSkillCatalogEntity
	require.NoError(t, s.db.First(&storedSkill, "id = ?", skill.ID).Error)
	require.False(t, storedSkill.Enabled)
}

type lifecycleAgentRepo struct {
	interfaces.CustomAgentRepository
	rows   map[string]*types.CustomAgent
	writes int
}

func (r *lifecycleAgentRepo) CreateAgent(_ context.Context, a *types.CustomAgent) error {
	r.writes++
	r.rows[a.ID] = a
	return nil
}

func (r *lifecycleAgentRepo) GetAgentByID(_ context.Context, id string, tenant uint64) (*types.CustomAgent, error) {
	a := r.rows[id]
	if a == nil || a.TenantID != tenant {
		return nil, repository.ErrCustomAgentNotFound
	}
	copy := *a
	return &copy, nil
}
func (r *lifecycleAgentRepo) ListAgentsByTenantID(_ context.Context, tenant uint64) ([]*types.CustomAgent, error) {
	out := []*types.CustomAgent{}
	for _, a := range r.rows {
		if a.TenantID == tenant {
			copy := *a
			out = append(out, &copy)
		}
	}
	return out, nil
}
func (r *lifecycleAgentRepo) UpdateAgent(_ context.Context, a *types.CustomAgent) error {
	r.writes++
	r.rows[a.ID] = a
	return nil
}
func (r *lifecycleAgentRepo) DeleteAgent(_ context.Context, id string, _ uint64) error {
	r.writes++
	delete(r.rows, id)
	return nil
}

func TestNativeAgentLifecycleReadWriteAndTenantIsolation(t *testing.T) {
	repo := &lifecycleAgentRepo{rows: map[string]*types.CustomAgent{
		"private":  {ID: "private", TenantID: 1, CreatedBy: "alice", Name: "Private", Visibility: "private", Enabled: true},
		"global":   {ID: "global", TenantID: 1, CreatedBy: "alice", Name: "Global", Visibility: "global", Enabled: true},
		"disabled": {ID: "disabled", TenantID: 1, CreatedBy: "alice", Name: "Disabled", Visibility: "global", Enabled: false},
		"legacy":   {ID: "legacy", TenantID: 1, CreatedBy: "alice", Name: "Legacy"},
	}}
	s := &customAgentService{repo: repo}
	bob := instructionContext(1, "bob", types.TenantRoleContributor)
	for _, id := range []string{"private", "disabled"} {
		_, err := s.GetAgentByID(bob, id)
		require.ErrorIs(t, err, ErrAgentNotFound)
	}
	for _, id := range []string{"global", "legacy"} {
		a, err := s.GetAgentByID(bob, id)
		require.NoError(t, err)
		require.True(t, a.Enabled)
	}
	list, err := s.ListAgents(bob)
	require.NoError(t, err)
	ids := []string{}
	for _, a := range list {
		ids = append(ids, a.ID)
	}
	require.Contains(t, ids, "global")
	require.NotContains(t, ids, "private")
	require.NotContains(t, ids, "disabled")
	_, err = s.UpdateAgent(bob, &types.CustomAgent{ID: "global", Name: "stolen"})
	require.Error(t, err)
	require.Error(t, s.DeleteAgent(bob, "global"))
	_, err = s.CopyAgent(bob, "global")
	require.ErrorContains(t, err, "不能复制")
	require.Zero(t, repo.writes)
	shareService := &agentShareService{agentRepo: repo}
	_, err = shareService.ShareAgent(bob, "private", "organization", "bob", 1, types.OrgRoleViewer)
	require.ErrorIs(t, err, ErrNotAgentOwner, "private Agents cannot be exposed by creating an organization share")
	_, err = s.GetAgentByIDAndTenant(instructionContext(2, "admin", types.TenantRoleAdmin), "global", 1)
	require.ErrorIs(t, err, ErrAgentNotFound)
	alice := instructionContext(1, "alice", types.TenantRoleContributor)
	a, err := s.UpdateAgent(alice, &types.CustomAgent{ID: "disabled", Name: "renamed"})
	require.NoError(t, err)
	require.False(t, a.Enabled, "old clients must preserve lifecycle fields")
	require.NoError(t, s.DeleteAgent(alice, "private"))
}

func TestInstructionCatalogCannotLeakThroughExecutableCatalogFallback(t *testing.T) {
	s, alice := instructionHarness(t)
	require.NoError(t, s.db.AutoMigrate(&types.TenantSkillEntity{}))
	skill, err := s.Import(alice, "secret.md", "", "", []byte("private body"))
	require.NoError(t, err)
	require.NoError(t, s.db.Create(&types.TenantSkillEntity{ID: "installation", TenantID: 1, CatalogID: skill.ID, Name: "secret", Enabled: true}).Error)
	service := NewTenantSkillService(repository.NewTenantSkillRepository(s.db), nil, nil, nil, nil, nil, nil, nil, nil, nil, nil, nil)
	bob := instructionContext(1, "bob", types.TenantRoleContributor)
	list, err := service.ListCatalog(bob, 1)
	require.NoError(t, err)
	require.Empty(t, list)
	for _, id := range []string{skill.ID, "installation"} {
		_, err = service.resolveCatalog(bob, 1, id)
		require.Error(t, err)
	}
	list, err = service.ListCatalog(instructionContext(2, "admin", types.TenantRoleAdmin), 1)
	require.NoError(t, err)
	require.Empty(t, list)
}