package server

import (
	"net/http"
	"strings"

	"task/internal/sqlite"
)

func (s *Server) handleListProjects(w http.ResponseWriter, r *http.Request) {
	u, _ := s.currentUser(r)
	projects, err := s.Projects.ListIDsForUser(u.ID, u.IsAdmin)
	if err != nil {
		writeError(w, http.StatusInternalServerError, err.Error())
		return
	}
	writeJSON(w, http.StatusOK, projects)
}

func (s *Server) handleCreateProject(w http.ResponseWriter, r *http.Request) {
	u, _ := s.currentUser(r)
	var body struct {
		Name string `json:"name"`
	}
	if err := readJSON(r, &body); err != nil {
		writeError(w, http.StatusBadRequest, "invalid json")
		return
	}
	body.Name = strings.TrimSpace(body.Name)
	if body.Name == "" {
		writeError(w, http.StatusBadRequest, "name is required")
		return
	}
	p, err := s.Projects.Create("", body.Name)
	if err != nil {
		writeError(w, http.StatusBadRequest, err.Error())
		return
	}
	_ = s.DB.SetMember(p.ID, u.ID, sqlite.RoleOwner)
	writeJSON(w, http.StatusCreated, p)
}

func (s *Server) handleGetProject(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	if _, ok, code := s.requireProjectRole(id, sqlite.RoleViewer, r); !ok {
		writeError(w, code, "forbidden")
		return
	}
	p, err := s.Projects.Get(id)
	if err != nil {
		writeError(w, http.StatusNotFound, err.Error())
		return
	}
	writeJSON(w, http.StatusOK, p)
}

func (s *Server) handlePatchProject(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	if _, ok, code := s.requireProjectRole(id, sqlite.RoleAdmin, r); !ok {
		writeError(w, code, "forbidden")
		return
	}
	var body struct {
		Name string `json:"name"`
	}
	if err := readJSON(r, &body); err != nil {
		writeError(w, http.StatusBadRequest, "invalid json")
		return
	}
	if err := s.Projects.Rename(id, body.Name); err != nil {
		writeError(w, http.StatusBadRequest, err.Error())
		return
	}
	p, _ := s.Projects.Get(id)
	writeJSON(w, http.StatusOK, p)
}

func (s *Server) handleDeleteProject(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	if _, ok, code := s.requireProjectRole(id, sqlite.RoleOwner, r); !ok {
		writeError(w, code, "forbidden")
		return
	}
	_ = s.Times.DeleteByProject(id)
	if err := s.Projects.Delete(id); err != nil {
		writeError(w, http.StatusBadRequest, err.Error())
		return
	}
	writeJSON(w, http.StatusOK, map[string]string{"status": "ok"})
}

func (s *Server) handleListMembers(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	if _, ok, code := s.requireProjectRole(id, sqlite.RoleViewer, r); !ok {
		writeError(w, code, "forbidden")
		return
	}
	members, err := s.DB.ListMembers(id)
	if err != nil {
		writeError(w, http.StatusInternalServerError, err.Error())
		return
	}
	writeJSON(w, http.StatusOK, members)
}

func (s *Server) handleSetMember(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	userID := r.PathValue("userId")
	if _, ok, code := s.requireProjectRole(id, sqlite.RoleAdmin, r); !ok {
		writeError(w, code, "forbidden")
		return
	}
	var body struct {
		Role string `json:"role"`
	}
	if err := readJSON(r, &body); err != nil {
		writeError(w, http.StatusBadRequest, "invalid json")
		return
	}
	if err := s.DB.SetMember(id, userID, body.Role); err != nil {
		writeError(w, http.StatusBadRequest, err.Error())
		return
	}
	writeJSON(w, http.StatusOK, map[string]string{"status": "ok"})
}

func (s *Server) handleRemoveMember(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	userID := r.PathValue("userId")
	if _, ok, code := s.requireProjectRole(id, sqlite.RoleAdmin, r); !ok {
		writeError(w, code, "forbidden")
		return
	}
	if err := s.DB.RemoveMember(id, userID); err != nil {
		writeError(w, http.StatusBadRequest, err.Error())
		return
	}
	writeJSON(w, http.StatusOK, map[string]string{"status": "ok"})
}