package server

import (
	"encoding/json"
	"fmt"
	"net/http"
)

// handleSessionCheck verifies the session is valid and returns session info.
func (s *Server) handleSessionCheck(w http.ResponseWriter, r *http.Request) {
	sess := GetSession(r)
	if sess == nil {
		if cookie, err := r.Cookie("session_id"); err == nil && cookie.Value != "" {
			sess = s.sessions.Get(cookie.Value)
		}
	}
	if sess == nil {
		s.writeJSONRPC(w, nil, nil, &RPCError{
			Code: 100, Message: "Session expired",
		})
		return
	}
	s.writeJSONRPC(w, nil, s.buildSessionInfo(sess), nil)
}

// handleSessionModules returns installed module names.
func (s *Server) handleSessionModules(w http.ResponseWriter, r *http.Request) {
	s.writeJSONRPC(w, nil, []string{
		"base", "web", "contacts", "sale", "account", "stock",
		"purchase", "crm", "hr", "project", "fleet", "product", "l10n_de",
	}, nil)
}

// handleManifest returns a minimal PWA manifest.
func (s *Server) handleManifest(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/manifest+json")
	json.NewEncoder(w).Encode(map[string]interface{}{
		"name":             "Odoo",
		"short_name":       "Odoo",
		"start_url":        "/web",
		"display":          "standalone",
		"background_color": "#71639e",
		"theme_color":      "#71639e",
		"icons": []map[string]string{
			{"src": "/web/static/img/odoo-icon-192x192.png", "sizes": "192x192", "type": "image/png"},
		},
	})
}

// handleBootstrapTranslations returns translations for initial boot (login page etc.).
// Mirrors: odoo/addons/web/controllers/webclient.py bootstrap_translations()
func (s *Server) handleBootstrapTranslations(w http.ResponseWriter, r *http.Request) {
	lang := "en_US"

	// Try to detect language from request
	if r.Method == http.MethodPost {
		var req JSONRPCRequest
		if err := json.NewDecoder(r.Body).Decode(&req); err == nil {
			var params struct {
				Mods []string `json:"mods"`
				Lang string   `json:"lang"`
			}
			if err := json.Unmarshal(req.Params, &params); err == nil && params.Lang != "" {
				lang = params.Lang
			}
		}
	}

	langParams := map[string]interface{}{
		"direction":     "ltr",
		"date_format":   "%%m/%%d/%%Y",
		"time_format":   "%%H:%%M:%%S",
		"grouping":      "[3,0]",
		"decimal_point": ".",
		"thousands_sep": ",",
		"week_start":    1,
	}

	// Try to load language parameters from res_lang
	var dateFormat, timeFormat, decimalPoint, thousandsSep, direction string
	err := s.pool.QueryRow(r.Context(),
		`SELECT date_format, time_format, decimal_point, thousands_sep, direction
		 FROM res_lang WHERE code = $1 AND active = true`, lang,
	).Scan(&dateFormat, &timeFormat, &decimalPoint, &thousandsSep, &direction)
	if err == nil {
		langParams["date_format"] = dateFormat
		langParams["time_format"] = timeFormat
		langParams["decimal_point"] = decimalPoint
		langParams["thousands_sep"] = thousandsSep
		langParams["direction"] = direction
	}

	// Check if multiple languages are active
	multiLang := false
	var langCount int
	if err := s.pool.QueryRow(r.Context(),
		`SELECT COUNT(*) FROM res_lang WHERE active = true`).Scan(&langCount); err == nil {
		if langCount > 1 {
			multiLang = true
		}
	}

	s.writeJSONRPC(w, nil, map[string]interface{}{
		"lang":            lang,
		"hash":            fmt.Sprintf("odoo-go-boot-%s", lang),
		"lang_parameters": langParams,
		"modules":         map[string]interface{}{},
		"multi_lang":      multiLang,
	}, nil)
}