package httpserver

import (
	"net/http"
	"net/url"
	"strings"

	"git.yuntuo.hk/k2safe/orbit/internal/consoleauth"
	"git.yuntuo.hk/k2safe/orbit/internal/fault"
	core "git.yuntuo.hk/k2safe/orbit/model"
	"git.yuntuo.hk/k2safe/orbit/platform/auth"
)

// RegisterConsoleApplications 只接受登录 Cookie；业务 Bearer 不能访问跨应用管理。
func RegisterConsoleApplications(server *http.Server, consoleAuth consoleauth.Store, store consoleauth.Applications) {
	if server == nil || consoleAuth == nil || store == nil {
		return
	}
	mux, ok := server.Handler.(*http.ServeMux)
	if !ok {
		return
	}
	check := func(w http.ResponseWriter, r *http.Request) (auth.Token, bool) {
		w.Header().Set("Cache-Control", "no-store")
		w.Header().Set("X-Content-Type-Options", "nosniff")
		token, ok := consoleCookieToken(r)
		if !ok || consoleAuth.ValidateSession(r.Context(), token) != nil {
			writeError(w, "", fault.Unauthorized)
			return auth.Token{}, false
		}
		// 自定义请求头触发跨域预检；不开放 CORS，另校验浏览器 Origin 和 Fetch Metadata。
		if r.Method != "GET" {
			if r.Header.Get("X-Orbit-Console") != "1" || r.Header.Get("Sec-Fetch-Site") == "cross-site" {
				writeError(w, "", fault.Forbidden)
				return auth.Token{}, false
			}
			if origin := r.Header.Get("Origin"); origin != "" {
				u, err := url.Parse(origin)
				if err != nil || (u.Scheme != "http" && u.Scheme != "https") || !strings.EqualFold(u.Host, r.Host) || u.User != nil {
					writeError(w, "", fault.Forbidden)
					return auth.Token{}, false
				}
			}
		}
		return token, true
	}
	if auditor, ok := store.(consoleauth.LoginAuditor); ok {
		mux.HandleFunc("GET /console/auth/audit", func(w http.ResponseWriter, r *http.Request) {
			token, ok := check(w, r)
			if !ok {
				return
			}
			out, err := auditor.ListLoginAudit(r.Context(), token, r.URL.Query().Get("before"))
			if err != nil {
				writeError(w, "", err)
				return
			}
			writeConsoleJSON(w, 200, map[string]any{"data": out})
		})
	}
	mux.HandleFunc("GET /console/applications", func(w http.ResponseWriter, r *http.Request) {
		token, ok := check(w, r)
		if !ok {
			return
		}
		out, err := store.ListApplications(r.Context(), token, core.ID(r.URL.Query().Get("after")))
		if err != nil {
			writeError(w, "", err)
			return
		}
		writeConsoleJSON(w, 200, map[string]any{"data": out})
	})
	mux.HandleFunc("GET /console/applications/{namespace}", func(w http.ResponseWriter, r *http.Request) {
		token, ok := check(w, r)
		if !ok {
			return
		}
		out, err := store.GetApplication(r.Context(), token, core.ID(r.PathValue("namespace")))
		if err != nil {
			writeError(w, "", err)
			return
		}
		writeConsoleJSON(w, 200, map[string]any{"data": out})
	})
	mux.HandleFunc("POST /console/applications/prepare", func(w http.ResponseWriter, r *http.Request) {
		token, ok := check(w, r)
		if !ok {
			return
		}
		var in consoleauth.ApplicationInput
		if err := decodeBody(r, &in); err != nil {
			writeError(w, "", err)
			return
		}
		out, err := store.PrepareApplication(r.Context(), token, in)
		if err != nil {
			writeError(w, "", err)
			return
		}
		writeConsoleJSON(w, 200, map[string]any{"data": out})
	})
	mux.HandleFunc("POST /console/applications/apply", func(w http.ResponseWriter, r *http.Request) {
		token, ok := check(w, r)
		if !ok {
			return
		}
		var in consoleauth.ApplicationOperation
		if err := decodeBody(r, &in); err != nil {
			writeError(w, "", err)
			return
		}
		out, err := store.ApplyApplication(r.Context(), token, in)
		if err != nil {
			writeError(w, "", err)
			return
		}
		writeConsoleJSON(w, 200, map[string]any{"data": out})
	})
	if secrets, ok := store.(consoleauth.CredentialTokens); ok {
		for _, action := range []string{"reveal", "import"} {
			mux.HandleFunc("POST /console/applications/{namespace}/credentials/{credential}/token/"+action, func(w http.ResponseWriter, r *http.Request) {
				token, ok := check(w, r)
				if !ok {
					return
				}
				var in consoleauth.CredentialTokenInput
				if err := decodeBody(r, &in); err != nil {
					writeError(w, "", err)
					return
				}
				out, err := secrets.AccessCredentialToken(r.Context(), token, core.ID(r.PathValue("namespace")), core.ID(r.PathValue("credential")), in, action == "import")
				if err != nil {
					writeError(w, "", err)
					return
				}
				writeConsoleJSON(w, 200, map[string]any{"data": out})
			})
		}
	}
}