package gateway

import (
	"encoding/json"
	"net/http"
	"os"
	"path/filepath"
	"strings"
	"testing"

	capreg "git.yeij.top/AskaEth/Cyrene_v2/internal/capability/registry"
	"git.yeij.top/AskaEth/Cyrene_v2/pkg/plugins/sdk"
)

// dailyBriefYAML 是一份合法的 Skill 定义：两步工作流 + 一条引用 +
// 一条护栏，用来断言注册进注册表的确实是「工作流」而不是空壳。
const dailyBriefYAML = `name: daily-brief
description: 每日简报
prompt: 你是简报助手
steps:
  - name: gather
    prompt: 收集今日要点
  - name: summarize
    prompt: 归纳成 3 条
    depends: [gather]
refs:
  - name: calendar
    type: tool
    value: calendar
guardrails:
  - id: no-pii
    message: 不要泄露隐私
    enforced: true
`

// skillInstallResult 是 install 响应中的 skill 分支字段。
type skillInstallResult struct {
	Installed  bool   `json:"installed"`
	Name       string `json:"name"`
	Kind       string `json:"kind"`
	Refreshed  bool   `json:"refreshed"`
	Steps      int    `json:"steps"`
	Guardrails int    `json:"guardrails"`
}

// errorEnvelope 是 {error:{code,message}} 信封的最小投影。
type errorEnvelope struct {
	Error struct {
		Code    string `json:"code"`
		Message string `json:"message"`
	} `json:"error"`
}

// installSkill 发起一次 skill 安装并返回状态码与原始响应体。
func installSkill(t *testing.T, env *pluginTestEnv, body any) (int, []byte) {
	t.Helper()
	resp, raw := doReq(t, http.MethodPost, env.ts.URL+"/api/v1/admin/plugins/install", body, env.token)
	return resp.StatusCode, raw
}

// TestAdminPluginInstallSkill_RegistersWorkflowCapability 是本条的真断言：
// POST kind="skill" 之后能力注册表里真的出现该 Skill（kind=skill），
// 且其步骤/引用/护栏按 YAML 落地 —— 而不是只回一个 200。
func TestAdminPluginInstallSkill_RegistersWorkflowCapability(t *testing.T) {
	t.Parallel()
	env := newPluginTestEnv(t, nil)

	status, raw := installSkill(t, env, map[string]any{"kind": "skill", "yaml": dailyBriefYAML})
	if status != http.StatusOK {
		t.Fatalf("install status = %d, body = %s", status, raw)
	}
	var envelope struct {
		Data skillInstallResult `json:"data"`
	}
	if err := json.Unmarshal(raw, &envelope); err != nil {
		t.Fatalf("decode: %v (%s)", err, raw)
	}
	if !envelope.Data.Installed || envelope.Data.Kind != "skill" || envelope.Data.Name != "daily-brief" || envelope.Data.Refreshed {
		t.Fatalf("install data = %+v", envelope.Data)
	}
	if envelope.Data.Steps != 2 || envelope.Data.Guardrails != 1 {
		t.Fatalf("install data counts = %+v, want 2 steps / 1 guardrail", envelope.Data)
	}

	cap, err := env.caps.Get("daily-brief")
	if err != nil {
		t.Fatalf("registry lookup: %v", err)
	}
	if cap.Kind != capreg.KindSkill {
		t.Fatalf("capability kind = %q, want %q", cap.Kind, capreg.KindSkill)
	}
	skill, ok := cap.Value.(sdk.Skill)
	if !ok {
		t.Fatalf("capability value = %T, want sdk.Skill", cap.Value)
	}
	if got := skill.Steps(); len(got) != 2 || got[1].Name != "summarize" || len(got[1].Depends) != 1 {
		t.Fatalf("steps = %+v", got)
	}
	if got := skill.Refs(); len(got) != 1 || got[0].Value != "calendar" {
		t.Fatalf("refs = %+v", got)
	}
	if got := skill.Guardrails(); len(got) != 1 || !got[0].Enforced || got[0].Message != "不要泄露隐私" {
		t.Fatalf("guardrails = %+v", got)
	}

	// 管理读面必须看得见它（面板靠 GET /admin/plugins 列出 kind=skill）。
	resp, raw := doReq(t, http.MethodGet, env.ts.URL+"/api/v1/admin/plugins", nil, env.token)
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("plugins list status = %d, body = %s", resp.StatusCode, raw)
	}
	var list struct {
		Data []PluginSummary `json:"data"`
	}
	if err := json.Unmarshal(raw, &list); err != nil {
		t.Fatalf("decode list: %v (%s)", err, raw)
	}
	found := false
	for _, it := range list.Data {
		if it.Name == "daily-brief" && it.Kind == "skill" && it.Description == "每日简报" {
			found = true
		}
	}
	if !found {
		t.Fatalf("skill not visible in /admin/plugins: %+v", list.Data)
	}
}

// TestAdminPluginInstallSkill_ReinstallRefreshesSameName 钉住「重复安装同名 =
// 刷新」语义：第二次带新描述的 YAML 必须换掉旧定义，而不是报冲突、
// 更不是留下旧定义（否则面板「保存成功」是假的）。
func TestAdminPluginInstallSkill_ReinstallRefreshesSameName(t *testing.T) {
	t.Parallel()
	env := newPluginTestEnv(t, nil)
	if status, raw := installSkill(t, env, map[string]any{"kind": "skill", "yaml": dailyBriefYAML}); status != http.StatusOK {
		t.Fatalf("first install status = %d, body = %s", status, raw)
	}
	updated := strings.Replace(dailyBriefYAML, "description: 每日简报", "description: 每日简报 v2", 1)
	status, raw := installSkill(t, env, map[string]any{"kind": "skill", "yaml": updated})
	if status != http.StatusOK {
		t.Fatalf("refresh status = %d, body = %s", status, raw)
	}
	var envelope struct {
		Data skillInstallResult `json:"data"`
	}
	if err := json.Unmarshal(raw, &envelope); err != nil {
		t.Fatalf("decode: %v (%s)", err, raw)
	}
	if !envelope.Data.Refreshed {
		t.Fatalf("refreshed = false, want true for same-name reinstall: %s", raw)
	}
	cap, err := env.caps.Get("daily-brief")
	if err != nil {
		t.Fatalf("registry lookup: %v", err)
	}
	if cap.Description != "每日简报 v2" {
		t.Fatalf("description after refresh = %q, want 每日简报 v2", cap.Description)
	}
	if n := len(env.caps.List(capreg.KindSkill)); n != 1 {
		t.Fatalf("skill count = %d, want 1 (refresh must not duplicate)", n)
	}
}

// TestAdminPluginInstallSkill_FromFile 覆盖 design/09 §2.1 的第二种来源：
// 磁盘 YAML 路径。同时验证卸载沿用通用能力移除路径。
func TestAdminPluginInstallSkill_FromFile(t *testing.T) {
	t.Parallel()
	env := newPluginTestEnv(t, nil)
	path := filepath.Join(t.TempDir(), "daily-brief.yaml")
	if err := os.WriteFile(path, []byte(dailyBriefYAML), 0o600); err != nil {
		t.Fatalf("write skill file: %v", err)
	}
	status, raw := installSkill(t, env, map[string]any{"kind": "skill", "path": path})
	if status != http.StatusOK {
		t.Fatalf("install status = %d, body = %s", status, raw)
	}
	if _, err := env.caps.Get("daily-brief"); err != nil {
		t.Fatalf("skill not registered from file: %v", err)
	}

	resp, raw := doReq(t, http.MethodPost, env.ts.URL+"/api/v1/admin/plugins/uninstall", map[string]any{"name": "daily-brief"}, env.token)
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("uninstall status = %d, body = %s", resp.StatusCode, raw)
	}
	if _, err := env.caps.Get("daily-brief"); err == nil {
		t.Fatal("skill still registered after uninstall")
	}
}

// TestAdminPluginInstallSkill_RejectsNameConflictWithOtherKind 证明刷新语义
// 不会越界：同名已被一个 tool 占用时返回 409，且那个 tool 必须原样存活
// （绝不先删后装）。
func TestAdminPluginInstallSkill_RejectsNameConflictWithOtherKind(t *testing.T) {
	t.Parallel()
	env := newPluginTestEnv(t, nil)
	if err := env.caps.RegisterTool(stubTool{}); err != nil { // 名为 "echo" 的工具
		t.Fatalf("register tool: %v", err)
	}
	conflicting := strings.Replace(dailyBriefYAML, "name: daily-brief", "name: echo", 1)
	status, raw := installSkill(t, env, map[string]any{"kind": "skill", "yaml": conflicting})
	if status != http.StatusConflict {
		t.Fatalf("status = %d, want 409, body = %s", status, raw)
	}
	var envErr errorEnvelope
	if err := json.Unmarshal(raw, &envErr); err != nil {
		t.Fatalf("decode error envelope: %v (%s)", err, raw)
	}
	if envErr.Error.Code != "name_conflict" {
		t.Fatalf("error code = %q, want name_conflict (%s)", envErr.Error.Code, raw)
	}
	cap, err := env.caps.Get("echo")
	if err != nil {
		t.Fatalf("tool echo disappeared after a rejected skill install: %v", err)
	}
	if cap.Kind != capreg.KindTool {
		t.Fatalf("capability echo kind = %q, want %q", cap.Kind, capreg.KindTool)
	}
}

// TestAdminPluginInstallSkill_InvalidRequestsReturn400 逐条钉住非法输入的
// 显式 400（不静默、不留半安装状态）。
func TestAdminPluginInstallSkill_InvalidRequestsReturn400(t *testing.T) {
	t.Parallel()
	env := newPluginTestEnv(t, nil)
	dir := t.TempDir()
	leaky := filepath.Join(dir, "leaky.yaml")
	// 类型不匹配会让 yaml 解码器把出错值的前几个字符写进错误信息，
	// 因此「文件来源」这条必须只回显通用原因（见下一条用例）。
	if err := os.WriteFile(leaky, []byte("name: leaky\nsteps: \"LEAKMARKER_SECRET\"\n"), 0o600); err != nil {
		t.Fatalf("write leaky skill: %v", err)
	}
	cases := []struct {
		name     string
		body     map[string]any
		wantCode string
	}{
		{"neither yaml nor path", map[string]any{"kind": "skill"}, "bad_request"},
		{"yaml and path", map[string]any{"kind": "skill", "yaml": dailyBriefYAML, "path": leaky}, "bad_request"},
		{"name mismatch", map[string]any{"kind": "skill", "name": "other", "yaml": dailyBriefYAML}, "name_mismatch"},
		{"blank name in yaml", map[string]any{"kind": "skill", "yaml": "description: 无名字\n"}, "skill_parse_failed"},
		{"not yaml at all", map[string]any{"kind": "skill", "yaml": "]{ not yaml"}, "skill_parse_failed"},
		{"missing file", map[string]any{"kind": "skill", "path": filepath.Join(dir, "nope.yaml")}, "skill_parse_failed"},
		{"path is a directory", map[string]any{"kind": "skill", "path": dir}, "skill_parse_failed"},
		{"bad yaml file", map[string]any{"kind": "skill", "path": leaky}, "skill_parse_failed"},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			t.Parallel()
			status, raw := installSkill(t, env, tc.body)
			if status != http.StatusBadRequest {
				t.Fatalf("status = %d, want 400, body = %s", status, raw)
			}
			var envErr errorEnvelope
			if err := json.Unmarshal(raw, &envErr); err != nil {
				t.Fatalf("decode error envelope: %v (%s)", err, raw)
			}
			if envErr.Error.Code != tc.wantCode {
				t.Fatalf("error code = %q, want %q (%s)", envErr.Error.Code, tc.wantCode, raw)
			}
		})
	}
	if n := len(env.caps.List(capreg.KindSkill)); n != 0 {
		t.Fatalf("skills registered after rejected installs = %d, want 0", n)
	}
}

// TestAdminPluginInstallSkill_FileParseErrorDoesNotEchoContent 是
// 上一条的安全面：文件由服务端读取，解析错误可能带出文件片段
// （yaml 解码器会打印出错值的前 7 个字符），因此响应体绝不回显
// 内容，只给通用原因 + 路径。
func TestAdminPluginInstallSkill_FileParseErrorDoesNotEchoContent(t *testing.T) {
	t.Parallel()
	env := newPluginTestEnv(t, nil)
	path := filepath.Join(t.TempDir(), "leaky.yaml")
	if err := os.WriteFile(path, []byte("name: leaky\nsteps: \"LEAKMARKER_SECRET\"\n"), 0o600); err != nil {
		t.Fatalf("write leaky skill: %v", err)
	}
	status, raw := installSkill(t, env, map[string]any{"kind": "skill", "path": path})
	if status != http.StatusBadRequest {
		t.Fatalf("status = %d, want 400, body = %s", status, raw)
	}
	// "LEAKMAR" 正是解码器会带出的前 7 个字符；回显内联内容时它必现，
	// 因此这一断言能真正抓住「把文件内容透给客户端」的回归。
	if strings.Contains(string(raw), "LEAKMAR") {
		t.Fatalf("file-sourced parse error echoed file content: %s", raw)
	}
	var envErr errorEnvelope
	if err := json.Unmarshal(raw, &envErr); err != nil {
		t.Fatalf("decode error envelope: %v (%s)", err, raw)
	}
	if strings.Contains(envErr.Error.Message, "LEAKMAR") {
		t.Fatalf("decoded message leaked file content: %s", envErr.Error.Message)
	}
	if !strings.Contains(envErr.Error.Message, path) {
		t.Fatalf("error should name the file path, got %q", envErr.Error.Message)
	}
}