package memory

import (
	"context"
	"errors"
	"testing"
)

func TestStore_ListScope_User_全局共享(t *testing.T) {
	t.Parallel()
	ctx := context.Background()
	s := newTestStore(t)

	for _, p := range []string{"persona.a", "persona.b"} {
		if _, err := s.AddScoped(ctx, p, MemoryItem{
			PersonaID: p, Scope: ScopeUser, Kind: KindRelationship,
			Content: "用户习惯-" + p,
		}); err != nil {
			t.Fatalf("AddScoped user for %s: %v", p, err)
		}
	}

	// persona.a 能看到两个角色的用户作用域条目（全局共享）。
	items, err := s.ListScope(ctx, ScopeUser, "persona.a")
	if err != nil {
		t.Fatalf("ListScope user: %v", err)
	}
	if len(items) != 2 {
		t.Fatalf("ListScope(user) = %d items, want 2 (globally shared)", len(items))
	}
}

func TestStore_ListScope_Persona_其他角色只读(t *testing.T) {
	t.Parallel()
	ctx := context.Background()
	s := newTestStore(t)

	if _, err := s.AddScoped(ctx, "persona.a", MemoryItem{
		Scope: ScopePersona, Kind: KindWorldEvent, Content: "a的日常",
	}); err != nil {
		t.Fatalf("AddScoped persona.a: %v", err)
	}

	// persona.b 可以读 persona.a 的角色作用域条目（只读规则）。
	items, err := s.ListScope(ctx, ScopePersona, "persona.b")
	if err != nil {
		t.Fatalf("ListScope persona for b: %v", err)
	}
	if len(items) != 1 || items[0].PersonaID != "persona.a" {
		t.Fatalf("ListScope(persona) for persona.b = %+v, want persona.a's item", items)
	}
	// AddScoped 用实施动作者自动填充了 PersonaID。
	if items[0].PersonaID != "persona.a" {
		t.Errorf("owner persona = %q, want persona.a", items[0].PersonaID)
	}
}

func TestStore_AddScoped_Persona_跨角色写_异常(t *testing.T) {
	t.Parallel()
	ctx := context.Background()
	s := newTestStore(t)

	if _, err := s.AddScoped(ctx, "persona.a", MemoryItem{
		Scope: ScopePersona, Kind: KindRelationship, Content: "a的日常",
	}); err != nil {
		t.Fatalf("AddScoped persona.a: %v", err)
	}

	// persona.b 不能写 persona.a 的角色作用域条目。
	_, err := s.AddScoped(ctx, "persona.b", MemoryItem{
		PersonaID: "persona.a", Scope: ScopePersona, Kind: KindRelationship,
		Content: "b想改a的日常",
	})
	if !errors.Is(err, ErrReadOnly) {
		t.Fatalf("AddScoped cross-persona err = %v, want wrap of ErrReadOnly", err)
	}
}

func TestStore_AddScoped_UserProject_人人写(t *testing.T) {
	t.Parallel()
	ctx := context.Background()
	s := newTestStore(t)

	// 任何角色都可以写用户或项目作用域的条目。
	for _, sc := range []Scope{ScopeUser, ScopeProject} {
		item, err := s.AddScoped(ctx, "persona.b", MemoryItem{
			Scope: sc, Kind: KindWorldEvent, Content: "共享-" + string(sc),
		})
		if err != nil {
			t.Fatalf("AddScoped %s: %v", sc, err)
		}
		// PersonaID 已用实施动作者自动填充。
		if item.PersonaID != "persona.b" {
			t.Errorf("AddScoped %s owner = %q, want persona.b", sc, item.PersonaID)
		}
	}
}

func TestStore_AddScoped_MissingActor_异常(t *testing.T) {
	t.Parallel()
	ctx := context.Background()
	s := newTestStore(t)

	if _, err := s.AddScoped(ctx, "", MemoryItem{
		Content: "x", Scope: ScopeUser,
	}); !errors.Is(err, ErrMissingPersona) {
		t.Fatalf("AddScoped(empty actor) err = %v, want ErrMissingPersona", err)
	}
}

func TestStore_AddScoped_InvalidScope_异常(t *testing.T) {
	t.Parallel()
	ctx := context.Background()
	s := newTestStore(t)

	if _, err := s.AddScoped(ctx, "persona.a", MemoryItem{
		Content: "x", Scope: "bogus",
	}); !errors.Is(err, ErrInvalidScope) {
		t.Fatalf("AddScoped(bogus scope) err = %v, want ErrInvalidScope", err)
	}
}

func TestStore_ListScope_前置校验_异常(t *testing.T) {
	t.Parallel()
	ctx := context.Background()
	s := newTestStore(t)

	if _, err := s.ListScope(ctx, ScopeUser, ""); !errors.Is(err, ErrMissingPersona) {
		t.Fatalf("ListScope(empty persona) err = %v, want ErrMissingPersona", err)
	}
	if _, err := s.ListScope(ctx, "bogus", "persona.a"); !errors.Is(err, ErrInvalidScope) {
		t.Fatalf("ListScope(bogus scope) err = %v, want ErrInvalidScope", err)
	}
}

func TestStore_DeleteScoped_跨角色_异常(t *testing.T) {
	t.Parallel()
	ctx := context.Background()
	s := newTestStore(t)

	stored, err := s.AddScoped(ctx, "persona.a", MemoryItem{
		Scope: ScopePersona, Kind: KindRelationship, Content: "a的日常",
	})
	if err != nil {
		t.Fatalf("AddScoped persona.a: %v", err)
	}

	// persona.a 删除自己的条目。
	if err := s.DeleteScoped(ctx, "persona.a", stored.ID); err != nil {
		t.Fatalf("DeleteScoped owner: %v", err)
	}

	// 重新添加，然后 persona.b 不能删除 persona.a 的条目。
	stored2, err := s.AddScoped(ctx, "persona.a", MemoryItem{
		Scope: ScopePersona, Kind: KindRelationship, Content: "a的日常2",
	})
	if err != nil {
		t.Fatalf("AddScoped persona.a: %v", err)
	}
	if err := s.DeleteScoped(ctx, "persona.b", stored2.ID); !errors.Is(err, ErrReadOnly) {
		t.Fatalf("DeleteScoped cross-persona err = %v, want ErrReadOnly", err)
	}
	// 他人的条目依然存在。
	if _, err := s.Get(ctx, stored2.ID); err != nil {
		t.Fatalf("foreign item removed: %v", err)
	}
}

func TestStore_DeleteScoped_BlankActor_异常(t *testing.T) {
	t.Parallel()
	ctx := context.Background()
	s := newTestStore(t)

	if err := s.DeleteScoped(ctx, "", "some-id"); !errors.Is(err, ErrMissingPersona) {
		t.Fatalf("DeleteScoped(empty actor) err = %v, want ErrMissingPersona", err)
	}
}

func TestStore_ListProject_项目记忆(t *testing.T) {
	t.Parallel()
	ctx := context.Background()
	s := newTestStore(t)

	if _, err := s.AddScoped(ctx, "persona.a", MemoryItem{
		Scope: ScopeProject, Kind: KindWorldEvent, Content: "项目Alpha事实",
		ProjectID: "project.alpha",
	}); err != nil {
		t.Fatalf("AddScoped project: %v", err)
	}
	if _, err := s.AddScoped(ctx, "persona.b", MemoryItem{
		Scope: ScopeProject, Kind: KindWorldEvent, Content: "项目Beta事实",
		ProjectID: "project.beta",
	}); err != nil {
		t.Fatalf("AddScoped project: %v", err)
	}

	items, err := s.ListProject(ctx, "project.alpha")
	if err != nil {
		t.Fatalf("ListProject: %v", err)
	}
	if len(items) != 1 || items[0].ProjectID != "project.alpha" {
		t.Fatalf("ListProject(alpha) = %+v, want only alpha item", items)
	}
	if items[0].Content != "项目Alpha事实" {
		t.Errorf("item content = %q, want the alpha item", items[0].Content)
	}
}

func TestStore_ListProject_BlankID_异常(t *testing.T) {
	t.Parallel()
	ctx := context.Background()
	s := newTestStore(t)

	if _, err := s.ListProject(ctx, ""); !errors.Is(err, ErrMissingProjectID) {
		t.Fatalf("ListProject(blank) err = %v, want ErrMissingProjectID", err)
	}
}