<?php
header("Content-Type: application/json");
header("Access-Control-Allow-Origin: *");
$action = $_GET["action"] ?? $_POST["action"] ?? "list";
$db_file = "/opt/weval-data/quotes.json";
if (!file_exists(dirname($db_file))) @mkdir(dirname($db_file), 0755, true);
if (!file_exists($db_file)) file_put_contents($db_file, "[]");
$quotes = json_decode(file_get_contents($db_file), true) ?: [];

switch ($action) {
    case "list":
        echo json_encode(["ok"=>true,"count"=>count($quotes),"quotes"=>$quotes]);
        break;
        
    case "create":
        $q = [
            "id" => "DEV-" . date("Ymd") . "-" . str_pad(count($quotes)+1, 3, "0", STR_PAD_LEFT),
            "client" => $_POST["client"] ?? "",
            "project" => $_POST["project"] ?? "",
            "lines" => json_decode($_POST["lines"] ?? "[]", true) ?: [],
            "total_ht" => floatval($_POST["total_ht"] ?? 0),
            "tva" => floatval($_POST["total_ht"] ?? 0) * 0.20,
            "total_ttc" => floatval($_POST["total_ht"] ?? 0) * 1.20,
            "currency" => $_POST["currency"] ?? "MAD",
            "validity_days" => intval($_POST["validity"] ?? 30),
            "status" => "draft", // draft, sent, accepted, rejected, expired, invoiced
            "created_at" => date("c"),
        ];
        // IA: générer une estimation si demandé
        if ($_POST["ai_estimate"] ?? false) {
            $prompt = "Estime le coût d'un projet: " . $q["project"] . " pour " . $q["client"] . 
                      ". Retourne un JSON avec les lignes de devis (description, jours, tjm_mad).";
            $ctx2 = stream_context_create(["http"=>["timeout"=>8,"method"=>"POST",
                "header"=>"Content-Type: application/json",
                "content"=>json_encode(["messages"=>[["role"=>"user","content"=>$prompt]],"max_tokens"=>300,"stream"=>false])]]);
            $resp = @file_get_contents("http://127.0.0.1:4000/v1/chat/completions", false, $ctx2);
            $ai = @json_decode($resp, true);
            $q["ai_estimate"] = $ai["choices"][0]["message"]["content"] ?? "Sovereign indisponible";
        }
        $quotes[] = $q;
        file_put_contents($db_file, json_encode($quotes, JSON_PRETTY_PRINT));
        echo json_encode(["ok"=>true,"quote"=>$q]);
        break;
        
    case "convert_invoice":
        $id = $_POST["id"] ?? "";
        foreach ($quotes as &$q) {
            if ($q["id"] === $id && $q["status"] === "accepted") {
                $q["status"] = "invoiced";
                // Créer la facture automatiquement
                $inv_data = ["client"=>$q["client"],"subtotal_ht"=>$q["total_ht"],"currency"=>$q["currency"],"lines"=>json_encode($q["lines"])];
                // POST vers invoice-api
                echo json_encode(["ok"=>true,"message"=>"Devis converti, créer facture via /api/invoice-api.php?action=create"]);
                break;
            }
        }
        file_put_contents($db_file, json_encode($quotes, JSON_PRETTY_PRINT));
        break;
        
    case "stats":
        echo json_encode(["ok"=>true,"total"=>count($quotes),
            "by_status"=>array_count_values(array_column($quotes,"status")),
            "pipeline_value"=>array_sum(array_map(fn($q)=>$q["status"]==="sent"?$q["total_ttc"]:0,$quotes))]);
        break;
        
    default:
        echo json_encode(["ok"=>false,"actions"=>["list","create","convert_invoice","stats"]]);
}
?>