<!-- [DEF:CommitModal:Component] -->
<!--
@SEMANTICS: git, commit, modal, version_control, diff
@PURPOSE:   Модальное окно для создания коммита с просмотром изменений (diff).
@LAYER:     Component
@RELATION:  CALLS -> gitService.commit
@RELATION:  CALLS -> gitService.getStatus
@RELATION:  CALLS -> gitService.getDiff
@RELATION:  DISPATCHES -> commit
-->

<script>
    // [SECTION: IMPORTS]
    import { createEventDispatcher, onMount } from 'svelte';
    import { gitService } from '../../services/gitService';
    import { addToast as toast } from '../../lib/toasts.js';
    import { api } from '../../lib/api';
    // [/SECTION]

    // [SECTION: PROPS]
    export let dashboardId;
    export let show = false;
    // [/SECTION]

    // [SECTION: STATE]
    let message = '';
    let committing = false;
    let status = null;
    let diff = '';
    let loading = false;
    let generatingMessage = false;
    // [/SECTION]

    const dispatch = createEventDispatcher();

    // [DEF:handleGenerateMessage:Function]
    /**
     * @purpose Generates a commit message using LLM.
     */
    async function handleGenerateMessage() {
        generatingMessage = true;
        try {
            console.log(`[CommitModal][Action] Generating commit message for dashboard ${dashboardId}`);
            // postApi returns the JSON data directly or throws an error
            const data = await api.postApi(`/git/repositories/${dashboardId}/generate-message`);
            message = data.message;
            toast('Commit message generated', 'success');
        } catch (e) {
            console.error(`[CommitModal][Coherence:Failed] ${e.message}`);
            toast(e.message || 'Failed to generate message', 'error');
        } finally {
            generatingMessage = false;
        }
    }
    // [/DEF:handleGenerateMessage:Function]

    // [DEF:loadStatus:Function]
    /**
     * @purpose Загружает текущий статус репозитория и diff.
     * @pre dashboardId должен быть валидным.
     */
    async function loadStatus() {
        if (!dashboardId || !show) return;
        loading = true;
        try {
            console.log(`[CommitModal][Action] Loading status and diff for ${dashboardId}`);
            status = await gitService.getStatus(dashboardId);
            // Fetch both unstaged and staged diffs to show complete picture
            const unstagedDiff = await gitService.getDiff(dashboardId, null, false);
            const stagedDiff = await gitService.getDiff(dashboardId, null, true);
            
            diff = "";
            if (stagedDiff) diff += "--- STAGED CHANGES ---\n" + stagedDiff + "\n\n";
            if (unstagedDiff) diff += "--- UNSTAGED CHANGES ---\n" + unstagedDiff;
            
            if (!diff) diff = "";
        } catch (e) {
            console.error(`[CommitModal][Coherence:Failed] ${e.message}`);
            toast('Failed to load changes', 'error');
        } finally {
            loading = false;
        }
    }
    // [/DEF:loadStatus:Function]

    // [DEF:handleCommit:Function]
    /**
     * @purpose Создает коммит с указанным сообщением.
     * @pre message не должно быть пустым.
     * @post Коммит создан, событие отправлено, модальное окно закрыто.
     */
    async function handleCommit() {
        if (!message) return;
        console.log(`[CommitModal][Action] Committing changes for dashboard ${dashboardId}`);
        committing = true;
        try {
            await gitService.commit(dashboardId, message, []);
            toast('Changes committed successfully', 'success');
            dispatch('commit');
            show = false;
            message = '';
            console.log(`[CommitModal][Coherence:OK] Committed`);
        } catch (e) {
            console.error(`[CommitModal][Coherence:Failed] ${e.message}`);
            toast(e.message, 'error');
        } finally {
            committing = false;
        }
    }
    // [/DEF:handleCommit:Function]

    $: if (show) loadStatus();
</script>

<!-- [SECTION: TEMPLATE] -->
{#if show}
    <div class="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50 p-4">
        <div class="bg-white p-6 rounded-lg shadow-xl w-full max-w-4xl max-h-[90vh] flex flex-col">
            <h2 class="text-xl font-bold mb-4">Commit Changes</h2>
            
            <div class="flex flex-col md:flex-row gap-4 flex-1 overflow-hidden">
                <!-- Left: Message and Files -->
                <div class="w-full md:w-1/3 flex flex-col">
                    <div class="mb-4">
                        <div class="flex justify-between items-center mb-1">
                            <label class="block text-sm font-medium text-gray-700">Commit Message</label>
                            <button
                                on:click={handleGenerateMessage}
                                disabled={generatingMessage || loading}
                                class="text-xs text-blue-600 hover:text-blue-800 disabled:opacity-50 flex items-center"
                            >
                                {#if generatingMessage}
                                    <span class="animate-spin mr-1">↻</span> Generating...
                                {:else}
                                    <span class="mr-1">✨</span> Generate with AI
                                {/if}
                            </button>
                        </div>
                        <textarea
                            bind:value={message}
                            class="w-full border rounded p-2 h-32 focus:ring-2 focus:ring-blue-500 outline-none resize-none"
                            placeholder="Describe your changes..."
                        ></textarea>
                    </div>

                    {#if status}
                        <div class="flex-1 overflow-y-auto">
                            <h3 class="text-sm font-bold text-gray-500 uppercase mb-2">Changed Files</h3>
                            <ul class="text-xs space-y-1">
                                {#each status.staged_files as file}
                                    <li class="text-green-600 flex items-center font-semibold" title="Staged">
                                        <span class="mr-2">S</span> {file}
                                    </li>
                                {/each}
                                {#each status.modified_files as file}
                                    <li class="text-yellow-600 flex items-center" title="Modified (Unstaged)">
                                        <span class="mr-2">M</span> {file}
                                    </li>
                                {/each}
                                {#each status.untracked_files as file}
                                    <li class="text-blue-600 flex items-center" title="Untracked">
                                        <span class="mr-2">?</span> {file}
                                    </li>
                                {/each}
                            </ul>
                        </div>
                    {/if}
                </div>

                <!-- Right: Diff Viewer -->
                <div class="w-full md:w-2/3 flex flex-col overflow-hidden border rounded bg-gray-50">
                    <div class="bg-gray-200 px-3 py-1 text-xs font-bold text-gray-600 border-b">Changes Preview</div>
                    <div class="flex-1 overflow-auto p-2">
                        {#if loading}
                            <div class="flex items-center justify-center h-full text-gray-500">Loading diff...</div>
                        {:else if diff}
                            <pre class="text-xs font-mono whitespace-pre-wrap">{diff}</pre>
                        {:else}
                            <div class="flex items-center justify-center h-full text-gray-500 italic">No changes detected</div>
                        {/if}
                    </div>
                </div>
            </div>

            <div class="flex justify-end space-x-3 mt-6 pt-4 border-t">
                <button 
                    on:click={() => show = false}
                    class="px-4 py-2 text-gray-600 hover:bg-gray-100 rounded"
                >
                    Cancel
                </button>
                <button
                    on:click={handleCommit}
                    disabled={committing || !message || loading || (!status?.is_dirty && status?.staged_files?.length === 0)}
                    class="px-4 py-2 bg-blue-600 text-white rounded hover:bg-blue-700 disabled:opacity-50"
                >
                    {committing ? 'Committing...' : 'Commit'}
                </button>
            </div>
        </div>
    </div>
{/if}
<!-- [/SECTION] -->

<style>
    pre {
        tab-size: 4;
    }
</style>

<!-- [/DEF:CommitModal:Component] -->