package server

import (
	"net/http"
	"time"

	"task/internal/sqlite"
	"task/internal/ticket"
)

func (s *Server) handleListProjectTime(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
	}
	list, err := s.Times.ListByProject(id)
	if err != nil {
		writeError(w, http.StatusInternalServerError, err.Error())
		return
	}
	writeJSON(w, http.StatusOK, list)
}

func (s *Server) handleCreateTime(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	u, ok, code := s.requireProjectRole(id, sqlite.RoleMember, r)
	if !ok {
		writeError(w, code, "forbidden")
		return
	}
	var body struct {
		TicketID string `json:"ticketId"`
		Duration int64  `json:"durationNs"`
		Note     string `json:"note"`
		Source   string `json:"source"`
	}
	if err := readJSON(r, &body); err != nil {
		writeError(w, http.StatusBadRequest, "invalid json")
		return
	}
	e, err := s.Times.Create(ticket.TimeEntry{
		TicketID:  body.TicketID,
		ProjectID: id,
		Duration:  time.Duration(body.Duration),
		Note:      body.Note,
		Source:    body.Source,
	})
	if err != nil {
		writeError(w, http.StatusBadRequest, err.Error())
		return
	}
	_, _ = s.DB.AppendRevision("time_entry", e.ID, id, "create", u.ID, e)
	writeJSON(w, http.StatusCreated, e)
}

func (s *Server) handleUpdateTime(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	eid := r.PathValue("eid")
	u, ok, code := s.requireProjectRole(id, sqlite.RoleMember, r)
	if !ok {
		writeError(w, code, "forbidden")
		return
	}
	var body struct {
		Duration int64  `json:"durationNs"`
		Note     string `json:"note"`
	}
	if err := readJSON(r, &body); err != nil {
		writeError(w, http.StatusBadRequest, "invalid json")
		return
	}
	entries, err := s.Times.ListByProject(id)
	if err != nil {
		writeError(w, http.StatusInternalServerError, err.Error())
		return
	}
	var found *ticket.TimeEntry
	for i := range entries {
		if entries[i].ID == eid {
			found = &entries[i]
			break
		}
	}
	if found == nil {
		writeError(w, http.StatusNotFound, "not found")
		return
	}
	if body.Duration > 0 {
		found.Duration = time.Duration(body.Duration)
	}
	found.Note = body.Note
	if err := s.Times.Update(*found); err != nil {
		writeError(w, http.StatusBadRequest, err.Error())
		return
	}
	_, _ = s.DB.AppendRevision("time_entry", found.ID, id, "update", u.ID, found)
	writeJSON(w, http.StatusOK, found)
}

func (s *Server) handleDeleteTime(w http.ResponseWriter, r *http.Request) {
	id := r.PathValue("id")
	eid := r.PathValue("eid")
	u, ok, code := s.requireProjectRole(id, sqlite.RoleMember, r)
	if !ok {
		writeError(w, code, "forbidden")
		return
	}
	entries, _ := s.Times.ListByProject(id)
	for _, e := range entries {
		if e.ID == eid {
			_, _ = s.DB.AppendRevision("time_entry", e.ID, id, "delete", u.ID, e)
			break
		}
	}
	if err := s.Times.Delete(eid); err != nil {
		writeError(w, http.StatusBadRequest, err.Error())
		return
	}
	writeJSON(w, http.StatusOK, map[string]string{"status": "ok"})
}

func (s *Server) handleGetTimer(w http.ResponseWriter, r *http.Request) {
	t, err := s.Times.LoadActiveTimer()
	if err != nil {
		writeError(w, http.StatusInternalServerError, err.Error())
		return
	}
	if t == nil {
		writeJSON(w, http.StatusOK, map[string]any{"timer": nil})
		return
	}
	writeJSON(w, http.StatusOK, map[string]any{"timer": t})
}

func (s *Server) handleStartTimer(w http.ResponseWriter, r *http.Request) {
	u, _ := s.currentUser(r)
	var body struct {
		TicketID  string `json:"ticketId"`
		ProjectID string `json:"projectId"`
	}
	if err := readJSON(r, &body); err != nil {
		writeError(w, http.StatusBadRequest, "invalid json")
		return
	}
	if _, ok, code := s.requireProjectRole(body.ProjectID, sqlite.RoleMember, r); !ok {
		writeError(w, code, "forbidden")
		return
	}
	t := &ticket.ActiveTimer{
		TicketID:  body.TicketID,
		ProjectID: body.ProjectID,
		StartedAt: time.Now().UTC(),
	}
	if err := s.Times.SaveActiveTimer(t); err != nil {
		writeError(w, http.StatusInternalServerError, err.Error())
		return
	}
	_ = u
	writeJSON(w, http.StatusOK, t)
}

func (s *Server) handleStopTimer(w http.ResponseWriter, r *http.Request) {
	u, _ := s.currentUser(r)
	active, err := s.Times.LoadActiveTimer()
	if err != nil {
		writeError(w, http.StatusInternalServerError, err.Error())
		return
	}
	if active == nil {
		writeError(w, http.StatusBadRequest, "no active timer")
		return
	}
	if _, ok, code := s.requireProjectRole(active.ProjectID, sqlite.RoleMember, r); !ok {
		writeError(w, code, "forbidden")
		return
	}
	dur := time.Since(active.StartedAt)
	if dur < time.Second {
		dur = time.Second
	}
	e, err := s.Times.Create(ticket.TimeEntry{
		TicketID:  active.TicketID,
		ProjectID: active.ProjectID,
		Start:     active.StartedAt,
		End:       time.Now().UTC(),
		Duration:  dur,
		Source:    ticket.SourceTimer,
	})
	if err != nil {
		writeError(w, http.StatusInternalServerError, err.Error())
		return
	}
	_ = s.Times.SaveActiveTimer(nil)
	_, _ = s.DB.AppendRevision("time_entry", e.ID, active.ProjectID, "create", u.ID, e)
	writeJSON(w, http.StatusOK, e)
}