// ==UserScript==
// @name         GitHub Tag Creator
// @namespace    http://tampermonkey.net/
// @version      2.2
// @description  Add ability to create tags on GitHub via API
// @author       freehuntx
// @match        https://github.com/*/*/tags*
// @grant        GM_xmlhttpRequest
// @grant        GM_addStyle
// @grant        GM_getValue
// @grant        GM_setValue
// ==/UserScript==

(function() {
    'use strict';

    console.log('[GitHub Tag Creator] Script loaded on:', window.location.href);

    // Add CSS for the tag creator UI
    GM_addStyle(`
        .tag-creator-button {
            margin-left: 16px;
        }

        .tag-creator-nav-button {
            display: inline-block;
            padding: 5px 16px;
            font-size: 14px;
            font-weight: 500;
            line-height: 20px;
            white-space: nowrap;
            vertical-align: middle;
            cursor: pointer;
            user-select: none;
            border: 1px solid;
            border-radius: 6px;
            appearance: none;
            color: var(--color-btn-text);
            background-color: var(--color-btn-bg);
            border-color: var(--color-btn-border);
            box-shadow: var(--color-btn-shadow), var(--color-btn-inset-shadow);
            transition: 80ms cubic-bezier(0.33, 1, 0.68, 1);
            transition-property: color, background-color, box-shadow, border-color;
        }

        .tag-creator-nav-button:hover {
            background-color: var(--color-btn-hover-bg);
            border-color: var(--color-btn-hover-border);
        }

        .tag-creator-inline-button {
            margin-left: 8px;
            padding: 3px 12px;
            font-size: 12px;
            line-height: 20px;
            color: var(--color-fg-default);
            background-color: var(--color-btn-bg);
            border: 1px solid var(--color-btn-border);
            border-radius: 6px;
            cursor: pointer;
        }

        .tag-creator-inline-button:hover {
            background-color: var(--color-btn-hover-bg);
        }

        .tag-creator-modal {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: var(--color-canvas-default, #ffffff);
            border: 1px solid var(--color-border-default, #d1d5da);
            border-radius: 6px;
            padding: 16px;
            z-index: 1000;
            box-shadow: 0 8px 24px rgba(140,149,159,0.2);
            min-width: 400px;
        }

        .tag-creator-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
        }

        .tag-creator-form {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .tag-creator-input {
            padding: 5px 12px;
            font-size: 14px;
            line-height: 20px;
            color: var(--color-fg-default, #24292e);
            vertical-align: middle;
            background-color: var(--color-canvas-default, #ffffff);
            background-repeat: no-repeat;
            background-position: right 8px center;
            border: 1px solid var(--color-border-default, #d1d5da);
            border-radius: 6px;
            outline: none;
            box-shadow: inset 0 1px 0 rgba(225,228,232,0.2);
        }

        .tag-creator-textarea {
            min-height: 100px;
            resize: vertical;
        }

        .tag-creator-actions {
            display: flex;
            gap: 8px;
            justify-content: flex-end;
            margin-top: 8px;
        }

        .tag-creator-error {
            color: var(--color-danger-fg, #cb2431);
            font-size: 12px;
            margin-top: 4px;
        }

        .tag-creator-success {
            color: var(--color-success-fg, #28a745);
            font-size: 12px;
            margin-top: 4px;
        }

        .tag-creator-close {
            position: absolute;
            top: 8px;
            right: 8px;
            background: none;
            border: none;
            font-size: 20px;
            cursor: pointer;
            color: var(--color-fg-muted, #586069);
            padding: 4px 8px;
        }

        .tag-creator-close:hover {
            color: var(--color-fg-default, #24292e);
        }
    `);

    // Function to get repository info from the current page
    function getRepoInfo() {
        const pathParts = window.location.pathname.split('/').filter(Boolean);
        if (pathParts.length >= 2) {
            return {
                owner: pathParts[0],
                repo: pathParts[1]
            };
        }
        return null;
    }

    // Try to extract token from various sources
    async function getGitHubToken() {
        // 1. Check if we have a saved token
        const savedToken = GM_getValue('github_token', '');
        if (savedToken) {
            return savedToken;
        }

        // 2. Try to get from GitHub's session (this might work if user has certain browser extensions)
        try {
            // Check if we can access GitHub's API with current session
            const response = await fetch('https://api.github.com/user', {
                headers: {
                    'Accept': 'application/vnd.github.v3+json'
                },
                credentials: 'include'
            });

            if (response.ok) {
                // Session auth might work, but we still need a PAT for API calls
                console.log('GitHub session detected, but Personal Access Token still required for API operations');
            }
        } catch (e) {
            console.log('No automatic token detection available');
        }

        // 3. Check for GitHub CLI token (gh) in localStorage
        try {
            const ghToken = localStorage.getItem('gh-token');
            if (ghToken) {
                return ghToken;
            }
        } catch (e) {}

        return '';
    }

    // Function to get the default branch
    async function getDefaultBranch(owner, repo, token) {
        return new Promise((resolve, reject) => {
            GM_xmlhttpRequest({
                method: 'GET',
                url: `https://api.github.com/repos/${owner}/${repo}`,
                headers: {
                    'Authorization': token ? `token ${token}` : '',
                    'Accept': 'application/vnd.github.v3+json'
                },
                onload: function(response) {
                    if (response.status >= 200 && response.status < 300) {
                        const data = JSON.parse(response.responseText);
                        resolve(data.default_branch);
                    } else {
                        reject(new Error(`Failed to fetch repository info: ${response.statusText}`));
                    }
                },
                onerror: function(error) {
                    reject(new Error(`Network error: ${error}`));
                }
            });
        });
    }

    // Function to get the latest commit SHA from default branch
    async function getLatestCommitSHA(owner, repo, token) {
        const defaultBranch = await getDefaultBranch(owner, repo, token);

        return new Promise((resolve, reject) => {
            GM_xmlhttpRequest({
                method: 'GET',
                url: `https://api.github.com/repos/${owner}/${repo}/git/refs/heads/${defaultBranch}`,
                headers: {
                    'Authorization': token ? `token ${token}` : '',
                    'Accept': 'application/vnd.github.v3+json'
                },
                onload: function(response) {
                    if (response.status >= 200 && response.status < 300) {
                        const data = JSON.parse(response.responseText);
                        resolve(data.object.sha);
                    } else {
                        reject(new Error(`Failed to fetch branch info: ${response.statusText}`));
                    }
                },
                onerror: function(error) {
                    reject(new Error(`Network error: ${error}`));
                }
            });
        });
    }

    // Function to create the tag via GitHub API
    async function createTag(owner, repo, tagName, commitSHA, message, token) {
        const refUrl = `https://api.github.com/repos/${owner}/${repo}/git/refs`;
        const tagData = {
            ref: `refs/tags/${tagName}`,
            sha: commitSHA
        };

        return new Promise((resolve, reject) => {
            GM_xmlhttpRequest({
                method: 'POST',
                url: refUrl,
                headers: {
                    'Authorization': `token ${token}`,
                    'Accept': 'application/vnd.github.v3+json',
                    'Content-Type': 'application/json'
                },
                data: JSON.stringify(tagData),
                onload: function(response) {
                    if (response.status >= 200 && response.status < 300) {
                        resolve(JSON.parse(response.responseText));
                    } else {
                        let errorMsg = `Failed to create tag: ${response.statusText}`;
                        try {
                            const errorData = JSON.parse(response.responseText);
                            if (errorData.message) {
                                errorMsg = errorData.message;
                            }
                        } catch (e) {}
                        reject(new Error(errorMsg));
                    }
                },
                onerror: function(error) {
                    reject(new Error(`Network error: ${error}`));
                }
            });
        });
    }

    // Function to create annotated tag
    async function createAnnotatedTag(owner, repo, tagName, commitSHA, message, token) {
        // First, get user info for tagger details
        const userInfo = await new Promise((resolve) => {
            GM_xmlhttpRequest({
                method: 'GET',
                url: 'https://api.github.com/user',
                headers: {
                    'Authorization': `token ${token}`,
                    'Accept': 'application/vnd.github.v3+json'
                },
                onload: function(response) {
                    if (response.status >= 200 && response.status < 300) {
                        resolve(JSON.parse(response.responseText));
                    } else {
                        resolve({ login: 'freehuntx', email: 'freehuntx@users.noreply.github.com' });
                    }
                }
            });
        });

        const tagUrl = `https://api.github.com/repos/${owner}/${repo}/git/tags`;
        const tagData = {
            tag: tagName,
            message: message,
            object: commitSHA,
            type: 'commit',
            tagger: {
                name: userInfo.name || userInfo.login || 'freehuntx',
                email: userInfo.email || `${userInfo.login || 'freehuntx'}@users.noreply.github.com`,
                date: new Date().toISOString()
            }
        };

        return new Promise((resolve, reject) => {
            GM_xmlhttpRequest({
                method: 'POST',
                url: tagUrl,
                headers: {
                    'Authorization': `token ${token}`,
                    'Accept': 'application/vnd.github.v3+json',
                    'Content-Type': 'application/json'
                },
                data: JSON.stringify(tagData),
                onload: async function(response) {
                    if (response.status >= 200 && response.status < 300) {
                        const tagObject = JSON.parse(response.responseText);
                        // Now create the reference to this tag object
                        try {
                            await createTag(owner, repo, tagName, tagObject.sha, message, token);
                            resolve(tagObject);
                        } catch (error) {
                            reject(error);
                        }
                    } else {
                        let errorMsg = `Failed to create annotated tag: ${response.statusText}`;
                        try {
                            const errorData = JSON.parse(response.responseText);
                            if (errorData.message) {
                                errorMsg = errorData.message;
                            }
                        } catch (e) {}
                        reject(new Error(errorMsg));
                    }
                },
                onerror: function(error) {
                    reject(new Error(`Network error: ${error}`));
                }
            });
        });
    }

    // Function to show the tag creation modal
    async function showTagCreatorModal(repoInfo) {
        // Remove any existing modal
        const existingModal = document.querySelector('.tag-creator-overlay');
        if (existingModal) {
            existingModal.remove();
        }

        // Try to get saved token
        const savedToken = await getGitHubToken();

        // Create modal HTML with close button
        const modalHTML = `
            <div class="tag-creator-overlay">
                <div class="tag-creator-modal">
                    <button class="tag-creator-close" title="Close">&times;</button>
                    <h3 style="margin-top: 0;">Create New Tag</h3>
                    <form class="tag-creator-form">
                        <div>
                            <label for="tag-name">Tag Name:</label>
                            <input type="text" id="tag-name" class="tag-creator-input" placeholder="v1.0.0" required>
                        </div>
                        <div>
                            <label for="commit-sha">Commit SHA:</label>
                            <input type="text" id="commit-sha" class="tag-creator-input" placeholder="Leave empty for latest commit">
                        </div>
                        <div>
                            <label for="tag-message">Message (optional for annotated tag):</label>
                            <textarea id="tag-message" class="tag-creator-input tag-creator-textarea" placeholder="Tag message..."></textarea>
                        </div>
                        <div>
                            <label for="github-token">GitHub Personal Access Token:</label>
                            <input type="password" id="github-token" class="tag-creator-input" placeholder="ghp_..." required value="${savedToken}">
                            <small style="color: var(--color-fg-muted);">
                                Need a token? <a href="https://github.com/settings/tokens/new?scopes=repo" target="_blank">Create one here</a> with 'repo' scope.
                            </small>
                        </div>
                        <div>
                            <label>
                                <input type="checkbox" id="save-token" ${savedToken ? 'checked' : ''}> Save token for future use
                            </label>
                        </div>
                        <div class="tag-creator-error" style="display: none;"></div>
                        <div class="tag-creator-success" style="display: none;"></div>
                        <div class="tag-creator-actions">
                            <button type="button" class="btn">Cancel</button>
                            <button type="submit" class="btn btn-primary">Create Tag</button>
                        </div>
                    </form>
                </div>
            </div>
        `;

        // Add modal to page
        document.body.insertAdjacentHTML('beforeend', modalHTML);

        // Handle close actions
        const closeModal = () => {
            document.querySelector('.tag-creator-overlay').remove();
        };

        // Close on overlay click
        document.querySelector('.tag-creator-overlay').addEventListener('click', (e) => {
            if (e.target.classList.contains('tag-creator-overlay')) {
                closeModal();
            }
        });

        // Close on close button click
        document.querySelector('.tag-creator-close').addEventListener('click', closeModal);

        // Close on cancel button click
        document.querySelector('.tag-creator-form button[type="button"]').addEventListener('click', closeModal);

        // Handle form submission
        const form = document.querySelector('.tag-creator-form');
        const errorDiv = document.querySelector('.tag-creator-error');
        const successDiv = document.querySelector('.tag-creator-success');

        form.addEventListener('submit', async (e) => {
            e.preventDefault();

            const tagName = document.getElementById('tag-name').value.trim();
            const commitSHA = document.getElementById('commit-sha').value.trim();
            const message = document.getElementById('tag-message').value.trim();
            const token = document.getElementById('github-token').value.trim();
            const saveToken = document.getElementById('save-token').checked;

            if (!tagName || !token) {
                errorDiv.textContent = 'Tag name and token are required';
                errorDiv.style.display = 'block';
                successDiv.style.display = 'none';
                return;
            }

            // Save token if requested
            if (saveToken) {
                GM_setValue('github_token', token);
            } else {
                // Clear saved token if unchecked
                GM_setValue('github_token', '');
            }

            // Disable submit button
            const submitBtn = form.querySelector('button[type="submit"]');
            submitBtn.disabled = true;
            submitBtn.textContent = 'Creating...';

            try {
                let sha = commitSHA;

                // If no SHA provided, get the latest commit
                if (!sha) {
                    sha = await getLatestCommitSHA(repoInfo.owner, repoInfo.repo, token);
                }

                // Create the tag
                if (message) {
                    // Create annotated tag
                    await createAnnotatedTag(
                        repoInfo.owner,
                        repoInfo.repo,
                        tagName,
                        sha,
                        message,
                        token
                    );
                } else {
                    // Create lightweight tag
                    await createTag(repoInfo.owner, repoInfo.repo, tagName, sha, '', token);
                }

                // Success
                successDiv.textContent = `Tag "${tagName}" created successfully!`;
                successDiv.style.display = 'block';
                errorDiv.style.display = 'none';

                // Reload page after 2 seconds
                setTimeout(() => {
                    window.location.reload();
                }, 2000);

            } catch (error) {
                errorDiv.textContent = error.message;
                errorDiv.style.display = 'block';
                successDiv.style.display = 'none';
                submitBtn.disabled = false;
                submitBtn.textContent = 'Create Tag';
            }
        });

        // Focus on tag name input
        document.getElementById('tag-name').focus();
    }

    // Function to add the "Create Tag" button to the tags page
    function addCreateTagButton() {
        const repoInfo = getRepoInfo();
        if (!repoInfo) {
            console.log('[GitHub Tag Creator] No repo info found');
            return;
        }

        // Don't add multiple buttons
        if (document.querySelector('.tag-creator-button')) {
            console.log('[GitHub Tag Creator] Button already exists');
            return;
        }

        console.log('[GitHub Tag Creator] Looking for places to add button...');

        // Try multiple selectors to find the right place
        const selectors = [
            'nav[aria-label="Releases and Tags"]',
            '.subnav',
            '.repository-content nav',
            '.BorderGrid-row nav',
            // Look for the nav containing the Tags link
            'a[href*="/tags"]'
        ];

        let targetElement = null;
        let placement = null;

        for (const selector of selectors) {
            const element = document.querySelector(selector);
            if (element) {
                console.log(`[GitHub Tag Creator] Found element with selector: ${selector}`, element);

                // If we found the Tags link, get its parent nav
                if (selector.includes('href*="/tags"')) {
                    targetElement = element.closest('nav');
                    placement = 'after-nav';
                } else {
                    targetElement = element;
                    placement = 'after-nav';
                }
                break;
            }
        }

        if (!targetElement) {
            console.log('[GitHub Tag Creator] No suitable location found for button');
            return;
        }

        console.log('[GitHub Tag Creator] Adding button to:', targetElement);

        const button = document.createElement('button');
        button.className = 'tag-creator-inline-button tag-creator-button';
        button.textContent = 'Create Tag';
        button.onclick = () => showTagCreatorModal(repoInfo);

        // Insert the button
        if (placement === 'after-nav' && targetElement.tagName === 'NAV') {
            // Create a wrapper div to hold the button
            const wrapper = document.createElement('div');
            wrapper.style.display = 'inline-block';
            wrapper.style.verticalAlign = 'middle';
            wrapper.appendChild(button);

            // Insert after the nav
            targetElement.parentNode.insertBefore(wrapper, targetElement.nextSibling);
        } else {
            // Fallback: just append to the element
            targetElement.appendChild(button);
        }

        console.log('[GitHub Tag Creator] Button added successfully');
    }

    // Wait for the page to be ready
    function waitForPageReady() {
        // Check if we're on a tags page
        if (!window.location.pathname.includes('/tags')) {
            console.log('[GitHub Tag Creator] Not on tags page, skipping');
            return;
        }

        // Try to add button immediately
        addCreateTagButton();

        // Also try after a delay
        setTimeout(() => {
            addCreateTagButton();
        }, 1000);

        // And watch for dynamic changes
        const observer = new MutationObserver((mutations) => {
            // Only react to significant changes
            for (const mutation of mutations) {
                if (mutation.addedNodes.length > 0) {
                    // Check if nav elements were added
                    for (const node of mutation.addedNodes) {
                        if (node.nodeType === 1 && (node.tagName === 'NAV' || node.querySelector?.('nav'))) {
                            console.log('[GitHub Tag Creator] Nav element added, trying to add button');
                            setTimeout(addCreateTagButton, 100);
                            break;
                        }
                    }
                }
            }
        });

        observer.observe(document.body, {
            childList: true,
            subtree: true
        });
    }

    // Start when DOM is ready
    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', waitForPageReady);
    } else {
        waitForPageReady();
    }
})();