package httpapi

import (
	"errors"
	"net/http"
	"strings"

	"github.com/descrybe/descrybe-v2/apps/api/internal/aiprompts"
	"github.com/descrybe/descrybe-v2/apps/api/internal/aiprovider"
	"github.com/descrybe/descrybe-v2/apps/api/internal/company"
)

func (s *Server) handleGetAIIntegration(w http.ResponseWriter, r *http.Request) {
	if s.AI == nil {
		Error(w, http.StatusServiceUnavailable, "ai integration unavailable")
		return
	}
	cid, _ := CompanyIDFromContext(r.Context())
	cfg, err := s.AI.GetConfig(r.Context(), cid)
	if err != nil {
		Error(w, http.StatusInternalServerError, "failed to load ai settings")
		return
	}
	JSON(w, http.StatusOK, cfg)
}

func (s *Server) handlePutAIIntegration(w http.ResponseWriter, r *http.Request) {
	role, _ := RoleFromContext(r.Context())
	if role != "admin" {
		Error(w, http.StatusForbidden, "admin required")
		return
	}
	if s.AI == nil {
		Error(w, http.StatusServiceUnavailable, "ai integration unavailable")
		return
	}
	cid, _ := CompanyIDFromContext(r.Context())
	var body aiprovider.UpdateInput
	if err := DecodeJSON(r, &body); err != nil {
		Error(w, http.StatusBadRequest, "invalid json")
		return
	}
	cfg, err := s.AI.UpdateConfig(r.Context(), cid, body)
	if err != nil {
		ClientOrLog(w, http.StatusBadRequest, "could not update ai settings", err, aiprovider.ClientError)
		return
	}
	JSON(w, http.StatusOK, cfg)
}

func (s *Server) handleTestAIIntegration(w http.ResponseWriter, r *http.Request) {
	role, _ := RoleFromContext(r.Context())
	if role != "admin" {
		Error(w, http.StatusForbidden, "admin required")
		return
	}
	if s.AI == nil {
		Error(w, http.StatusServiceUnavailable, "ai integration unavailable")
		return
	}
	cid, _ := CompanyIDFromContext(r.Context())
	result, err := s.AI.TestConnection(r.Context(), cid)
	if errors.Is(err, aiprovider.ErrNotConfigured) {
		Error(w, http.StatusBadRequest, "ai provider not configured")
		return
	}
	if err != nil {
		// Safe message only — never echo provider error bodies (may contain key fragments).
		JSON(w, http.StatusOK, result)
		return
	}
	JSON(w, http.StatusOK, result)
}

func (s *Server) handleGetAIPrompts(w http.ResponseWriter, r *http.Request) {
	if s.AIPrompts == nil {
		Error(w, http.StatusServiceUnavailable, "ai prompts unavailable")
		return
	}
	cid, _ := CompanyIDFromContext(r.Context())
	lang := strings.TrimSpace(r.URL.Query().Get("language"))
	if lang == "" {
		lang = company.LoadLanguage(r.Context(), s.Pool, cid)
	}
	bundle, err := s.AIPrompts.GetBundle(r.Context(), cid, lang)
	if err != nil {
		Error(w, http.StatusInternalServerError, "failed to load ai prompts")
		return
	}
	JSON(w, http.StatusOK, bundle)
}

func (s *Server) handlePutAIPrompts(w http.ResponseWriter, r *http.Request) {
	role, _ := RoleFromContext(r.Context())
	if role != "admin" {
		Error(w, http.StatusForbidden, "admin required")
		return
	}
	if s.AIPrompts == nil {
		Error(w, http.StatusServiceUnavailable, "ai prompts unavailable")
		return
	}
	cid, _ := CompanyIDFromContext(r.Context())
	var body aiprompts.UpdateInput
	if err := DecodeJSON(r, &body); err != nil {
		Error(w, http.StatusBadRequest, "invalid json")
		return
	}
	bundle, err := s.AIPrompts.Update(r.Context(), cid, body)
	if err != nil {
		ClientOrLog(w, http.StatusBadRequest, "could not update ai prompts", err, aiprompts.ClientError)
		return
	}
	JSON(w, http.StatusOK, bundle)
}