<?php
session_start();
if (!isset($_SESSION['user_id']) || $_SESSION['role'] !== 'founder') {
    header("Location: login.php");
    exit;
}

require_once __DIR__ . '/db/config.php';
require_once __DIR__ . '/ai/LocalAIApi.php';

$error = '';
$success = '';
$existingStartup = null;

$startup_id = (int)($_GET['id'] ?? 0);
if ($startup_id > 0) {
    $stmt = db()->prepare("SELECT * FROM startups WHERE id = ? AND founder_id = ?");
    $stmt->execute([$startup_id, $_SESSION['user_id']]);
    $existingStartup = $stmt->fetch();
}

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    // Basic Info
    $name = trim($_POST['name'] ?? '');
    $legal_name = trim($_POST['legal_name'] ?? '');
    $country = trim($_POST['country'] ?? '');
    $industry = trim($_POST['industry'] ?? '');
    $sub_industry = trim($_POST['sub_industry'] ?? '');
    $business_model = trim($_POST['business_model'] ?? '');
    $product_service = trim($_POST['product_service'] ?? '');
    $operational_stage = trim($_POST['operational_stage'] ?? '');

    // Equity Structure
    $total_shares = (int)($_POST['total_shares'] ?? 0);
    $share_classes = trim($_POST['share_classes'] ?? '');
    $founder_ownership = trim($_POST['founder_ownership'] ?? '');
    $investor_ownership = trim($_POST['investor_ownership'] ?? '');
    $esop_percentage = (float)($_POST['esop_percentage'] ?? 0);
    $convertible_instruments = trim($_POST['convertible_instruments'] ?? '');

    // Current Financials
    $current_cash_balance = (float)($_POST['current_cash_balance'] ?? 0);
    $outstanding_debt = trim($_POST['outstanding_debt'] ?? '');
    $accounts_receivable_payable = trim($_POST['accounts_receivable_payable'] ?? '');
    $burn_rate = (float)($_POST['burn_rate'] ?? 0);

    // File Uploads
    $upload_dir = 'assets/docs/financials/';
    if (!is_dir($upload_dir)) {
        mkdir($upload_dir, 0775, true);
    }

    $doc_fields = [
        'doc_income_statements',
        'doc_balance_sheets',
        'doc_cash_flow_statements',
        'doc_revenue_breakdown',
        'doc_gross_margin',
        'doc_opex_breakdown'
    ];

    $uploaded_paths = [];
    foreach ($doc_fields as $field) {
        if (isset($_FILES[$field]) && $_FILES[$field]['error'] === UPLOAD_ERR_OK) {
            $file_ext = pathinfo($_FILES[$field]['name'], PATHINFO_EXTENSION);
            $file_name = uniqid($field . '_', true) . '.' . $file_ext;
            $dest_path = $upload_dir . $file_name;
            if (move_uploaded_file($_FILES[$field]['tmp_name'], $dest_path)) {
                $uploaded_paths[$field] = $dest_path;
            } else {
                $error = "Failed to upload $field.";
                break;
            }
        } elseif ($existingStartup && !empty($existingStartup[$field])) {
            $uploaded_paths[$field] = $existingStartup[$field];
        } else {
            $error = "The financial document for $field is mandatory.";
            break;
        }
    }

    if (!$error) {
        if (empty($name) || empty($legal_name) || empty($country) || empty($industry) || empty($business_model) || empty($product_service) || empty($operational_stage)) {
            $error = "Please fill in all mandatory company information fields.";
        }
    }

    if (!$error) {
        db()->beginTransaction();
        try {
            // Compute AI Recommended Return Rate
            $recommended_return_rate = $existingStartup['recommended_return_rate'] ?? 0.0;
            
            // Re-calculate only if it's a new startup or if financials changed significantly (simplified: always re-calc if it's a POST)
            $prompt = "As a financial analyst, calculate a recommended annual dividend yield (interest percentage) based on this startup profile:
            Name: {$name}
            Industry: {$industry}/{$sub_industry}
            Business Model: {$business_model}
            Product: {$product_service}
            Stage: {$operational_stage}
            Cash Balance: £{$current_cash_balance}
            Burn Rate: £{$burn_rate}
            
            Respond ONLY with a JSON object: {\"recommended_rate\": X.X}";

            $aiResponse = LocalAIApi::createResponse([
                'input' => [
                    ['role' => 'system', 'content' => 'You are a financial analyst. Return JSON only.'],
                    ['role' => 'user', 'content' => $prompt],
                ],
            ]);

            if (!empty($aiResponse['success'])) {
                $decoded = LocalAIApi::decodeJsonFromResponse($aiResponse);
                $recommended_return_rate = (float)($decoded['recommended_rate'] ?? 5.0);
            }

            if ($existingStartup) {
                $stmt = db()->prepare("UPDATE startups SET 
                    name = ?, legal_name = ?, country = ?, industry = ?, sub_industry = ?, business_model = ?, product_service = ?, operational_stage = ?,
                    total_shares = ?, share_classes = ?, founder_ownership = ?, investor_ownership = ?, esop_percentage = ?, convertible_instruments = ?,
                    current_cash_balance = ?, outstanding_debt = ?, accounts_receivable_payable = ?, burn_rate = ?,
                    doc_income_statements = ?, doc_balance_sheets = ?, doc_cash_flow_statements = ?, doc_revenue_breakdown = ?, doc_gross_margin = ?, doc_opex_breakdown = ?,
                    recommended_return_rate = ?
                    WHERE id = ? AND founder_id = ?");

                $stmt->execute([
                    $name, $legal_name, $country, $industry, $sub_industry, $business_model, $product_service, $operational_stage,
                    $total_shares, $share_classes, $founder_ownership, $investor_ownership, $esop_percentage, $convertible_instruments,
                    $current_cash_balance, $outstanding_debt, $accounts_receivable_payable, $burn_rate,
                    $uploaded_paths['doc_income_statements'], $uploaded_paths['doc_balance_sheets'], $uploaded_paths['doc_cash_flow_statements'], 
                    $uploaded_paths['doc_revenue_breakdown'], $uploaded_paths['doc_gross_margin'], $uploaded_paths['doc_opex_breakdown'],
                    $recommended_return_rate, $existingStartup['id'], $_SESSION['user_id']
                ]);
                $final_id = $existingStartup['id'];
            } else {
                $stmt = db()->prepare("INSERT INTO startups (
                    name, legal_name, country, industry, sub_industry, business_model, product_service, operational_stage,
                    total_shares, share_classes, founder_ownership, investor_ownership, esop_percentage, convertible_instruments,
                    current_cash_balance, outstanding_debt, accounts_receivable_payable, burn_rate,
                    doc_income_statements, doc_balance_sheets, doc_cash_flow_statements, doc_revenue_breakdown, doc_gross_margin, doc_opex_breakdown,
                    founder_id, recommended_return_rate, status
                ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 'private')");

                $stmt->execute([
                    $name, $legal_name, $country, $industry, $sub_industry, $business_model, $product_service, $operational_stage,
                    $total_shares, $share_classes, $founder_ownership, $investor_ownership, $esop_percentage, $convertible_instruments,
                    $current_cash_balance, $outstanding_debt, $accounts_receivable_payable, $burn_rate,
                    $uploaded_paths['doc_income_statements'], $uploaded_paths['doc_balance_sheets'], $uploaded_paths['doc_cash_flow_statements'], 
                    $uploaded_paths['doc_revenue_breakdown'], $uploaded_paths['doc_gross_margin'], $uploaded_paths['doc_opex_breakdown'],
                    $_SESSION['user_id'], $recommended_return_rate
                ]);
                $final_id = db()->lastInsertId();
            }

            db()->commit();
            $success = "Startup profile saved successfully! Recommended return rate: " . number_format($recommended_return_rate, 2) . "%ற்றில்";
            header("refresh:2;url=startup_details.php?id=" . $final_id);
        } catch (Exception $e) {
            db()->rollBack();
            $error = "Error: " . $e->getMessage();
        }
    }
}

$platformName = defined('PLATFORM_NAME') ? PLATFORM_NAME : 'Gatsby';
?>
<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title><?= $existingStartup ? 'Edit Profile' : 'Step 1: Setup Startup Profile' ?> — <?= htmlspecialchars($platformName) ?></title>
    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap" rel="stylesheet">
    <link rel="stylesheet" href="assets/css/custom.css?v=<?php echo time(); ?>">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
</head>
<body style="padding: 60px 20px; background: #0f0f13;">

<div class="container" style="max-width: 900px; margin: 0 auto;">
    <div class="card" style="padding: 40px;">
        <h1 style="font-size: 32px; font-weight: 800; margin-bottom: 10px;"><?= $existingStartup ? 'Edit Startup Profile' : 'Step 1: Company Profile Setup' ?></h1>
        <p style="color: var(--text-secondary); margin-bottom: 30px;">
            <?= $existingStartup ? 'Update your venture details below.' : 'This information is required to establish your startup entity and calculate investor return projections.' ?>
        </p>

        <?php if ($error): ?>
            <div style="background: rgba(255, 0, 0, 0.1); border: 1px solid rgba(255, 0, 0, 0.3); color: #ff5555; padding: 15px; border-radius: 12px; margin-bottom: 25px;">
                <i class="fas fa-exclamation-circle" style="margin-right: 8px;"></i> <?= htmlspecialchars($error) ?>
            </div>
        <?php endif; ?>

        <?php if ($success): ?>
            <div style="background: rgba(0, 255, 0, 0.1); border: 1px solid rgba(0, 255, 0, 0.3); color: #55ff55; padding: 15px; border-radius: 12px; margin-bottom: 25px;">
                <i class="fas fa-check-circle" style="margin-right: 8px;"></i> <?= htmlspecialchars($success) ?>
            </div>
        <?php else: ?>
            <form method="POST" enctype="multipart/form-data">
                
                <h3 style="margin-bottom: 20px; border-bottom: 1px solid var(--border-color); padding-bottom: 10px; font-size: 18px;"><i class="fas fa-info-circle"></i> 1. Basic Company Information</h3>
                <div style="display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px;">
                    <div>
                        <label>Startup Name *</label>
                        <input type="text" name="name" required value="<?= htmlspecialchars($existingStartup['name'] ?? '') ?>">
                    </div>
                    <div>
                        <label>Registered Legal Name *</label>
                        <input type="text" name="legal_name" required value="<?= htmlspecialchars($existingStartup['legal_name'] ?? '') ?>">
                    </div>
                    <div>
                        <label>Country of Incorporation *</label>
                        <input type="text" name="country" required value="<?= htmlspecialchars($existingStartup['country'] ?? '') ?>">
                    </div>
                    <div>
                        <label>Industry *</label>
                        <select name="industry" required>
                            <?php $ind = $existingStartup['industry'] ?? ''; ?>
                            <option value="">Select Industry</option>
                            <option value="Fintech" <?= $ind == 'Fintech' ? 'selected' : '' ?>>Fintech</option>
                            <option value="Healthtech" <?= $ind == 'Healthtech' ? 'selected' : '' ?>>Healthtech</option>
                            <option value="Edtech" <?= $ind == 'Edtech' ? 'selected' : '' ?>>Edtech</option>
                            <option value="SaaS" <?= $ind == 'SaaS' ? 'selected' : '' ?>>SaaS</option>
                            <option value="AI & Robotics" <?= $ind == 'AI & Robotics' ? 'selected' : '' ?>>AI & Robotics</option>
                            <option value="Clean Energy" <?= $ind == 'Clean Energy' ? 'selected' : '' ?>>Clean Energy</option>
                            <option value="Other" <?= $ind == 'Other' ? 'selected' : '' ?>>Other</option>
                        </select>
                    </div>
                    <div>
                        <label>Sub-Industry *</label>
                        <input type="text" name="sub_industry" required value="<?= htmlspecialchars($existingStartup['sub_industry'] ?? '') ?>">
                    </div>
                    <div>
                        <label>Operational Stage *</label>
                        <select name="operational_stage" required>
                            <?php $stage = $existingStartup['operational_stage'] ?? ''; ?>
                            <option value="">Select Stage</option>
                            <option value="Idea" <?= $stage == 'Idea' ? 'selected' : '' ?>>Idea / Concept</option>
                            <option value="MVP" <?= $stage == 'MVP' ? 'selected' : '' ?>>MVP (Minimum Viable Product)</option>
                            <option value="Pre-revenue" <?= $stage == 'Pre-revenue' ? 'selected' : '' ?>>Pre-revenue (Early Traction)</option>
                            <option value="Revenue-generating" <?= $stage == 'Revenue-generating' ? 'selected' : '' ?>>Revenue-generating</option>
                            <option value="Scaling" <?= $stage == 'Scaling' ? 'selected' : '' ?>>Scaling / Growth</option>
                        </select>
                    </div>
                </div>
                <div style="margin-bottom: 20px;">
                    <label>Business Model Description *</label>
                    <textarea name="business_model" required style="height: 80px;"><?= htmlspecialchars($existingStartup['business_model'] ?? '') ?></textarea>
                </div>
                <div style="margin-bottom: 30px;">
                    <label>Product/Service Description *</label>
                    <textarea name="product_service" required style="height: 80px;"><?= htmlspecialchars($existingStartup['product_service'] ?? '') ?></textarea>
                </div>

                <h3 style="margin-bottom: 20px; border-bottom: 1px solid var(--border-color); padding-bottom: 10px; font-size: 18px;"><i class="fas fa-chart-pie"></i> 2. Equity Structure Information</h3>
                <div style="display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px;">
                    <div>
                        <label>Total Shares Issued</label>
                        <input type="number" name="total_shares" value="<?= (int)($existingStartup['total_shares'] ?? 1000000) ?>">
                    </div>
                    <div>
                        <label>ESOP Pool (%)</label>
                        <input type="number" step="0.01" name="esop_percentage" value="<?= (float)($existingStartup['esop_percentage'] ?? 0) ?>">
                    </div>
                </div>
                <div style="margin-bottom: 20px;">
                    <label>Share Classes</label>
                    <textarea name="share_classes" style="height: 60px;"><?= htmlspecialchars($existingStartup['share_classes'] ?? '') ?></textarea>
                </div>
                <div style="margin-bottom: 20px;">
                    <label>Founder Ownership Breakdown</label>
                    <textarea name="founder_ownership" style="height: 60px;"><?= htmlspecialchars($existingStartup['founder_ownership'] ?? '') ?></textarea>
                </div>
                <div style="margin-bottom: 20px;">
                    <label>Existing Investor Ownership</label>
                    <textarea name="investor_ownership" style="height: 60px;"><?= htmlspecialchars($existingStartup['investor_ownership'] ?? '') ?></textarea>
                </div>
                <div style="margin-bottom: 30px;">
                    <label>Convertible Instruments (SAFE, Notes)</label>
                    <textarea name="convertible_instruments" style="height: 60px;"><?= htmlspecialchars($existingStartup['convertible_instruments'] ?? '') ?></textarea>
                </div>

                <h3 style="margin-bottom: 20px; border-bottom: 1px solid var(--border-color); padding-bottom: 10px; font-size: 18px;"><i class="fas fa-file-invoice-dollar"></i> 3. Mandatory Financials</h3>
                
                <div style="background: rgba(255,255,255,0.03); padding: 20px; border-radius: 12px; margin-bottom: 25px;">
                    <div style="display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px;">
                        <div>
                            <label>Current Cash Balance (£)</label>
                            <input type="number" step="0.01" name="current_cash_balance" value="<?= (float)($existingStartup['current_cash_balance'] ?? 0) ?>">
                        </div>
                        <div>
                            <label>Monthly Burn Rate (£)</label>
                            <input type="number" step="0.01" name="burn_rate" value="<?= (float)($existingStartup['burn_rate'] ?? 0) ?>">
                        </div>
                    </div>
                    <div style="margin-bottom: 20px;">
                        <label>Outstanding Debt</label>
                        <input type="text" name="outstanding_debt" value="<?= htmlspecialchars($existingStartup['outstanding_debt'] ?? '') ?>">
                    </div>
                    <div style="margin-bottom: 20px;">
                        <label>Accounts Receivable / Payable</label>
                        <input type="text" name="accounts_receivable_payable" value="<?= htmlspecialchars($existingStartup['accounts_receivable_payable'] ?? '') ?>">
                    </div>
                </div>

                <p style="font-size: 14px; font-weight: 700; color: var(--accent-blue); margin-bottom: 15px;">Historical Financial Documentation (PDF/Images)</p>
                <div style="display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-bottom: 30px;">
                    <?php 
                    $doc_labels = [
                        'doc_income_statements' => 'Income Statements',
                        'doc_balance_sheets' => 'Balance Sheets',
                        'doc_cash_flow_statements' => 'Cash Flow Statements',
                        'doc_revenue_breakdown' => 'Revenue Breakdown',
                        'doc_gross_margin' => 'Gross Margin Data',
                        'doc_opex_breakdown' => 'OpEx Breakdown'
                    ];
                    foreach ($doc_labels as $f_name => $label):
                    ?>
                    <div class="file-input-group">
                        <label><?= $label ?> <?= $existingStartup ? '' : '*' ?></label>
                        <input type="file" name="<?= $f_name ?>" <?= $existingStartup ? '' : 'required' ?> accept=".pdf,image/*">
                        <?php if ($existingStartup && !empty($existingStartup[$f_name])):
                        ?>
                            <span style="font-size: 10px; color: #4cd964;"><i class="fas fa-check"></i> Already uploaded</span>
                        <?php endif; ?>
                    </div>
                    <?php endforeach; ?>
                </div>

                <button type="submit" class="btn btn-primary" style="width: 100%; padding: 18px; font-weight: 800; font-size: 18px; border-radius: 16px;">
                    <?= $existingStartup ? 'Update Profile' : 'Create Startup Profile' ?> <i class="fas fa-save" style="margin-left: 10px;"></i>
                </button>
                <a href="<?= $existingStartup ? 'startup_details.php?id=' . $startup_id : 'dashboard.php' ?>" style="display: block; text-align: center; margin-top: 15px; color: var(--text-secondary); text-decoration: none;">Cancel</a>
            </form>
        <?php endif; ?>
    </div>
</div>

<style>
    label { display: block; margin-bottom: 8px; font-size: 13px; font-weight: 600; color: var(--text-secondary); }
    input, select, textarea { width: 100%; padding: 12px 16px; background: var(--surface-color); border: 1px solid var(--border-color); border-radius: 12px; color: #fff; font-size: 14px; margin-bottom: 10px; }
    textarea { resize: vertical; }
    .file-input-group { background: rgba(255,255,255,0.02); padding: 15px; border-radius: 12px; border: 1px dashed var(--border-color); }
    .file-input-group input { border: none; padding: 0; margin: 0; background: transparent; }
</style>

</body>
</html>