/* ===== Character Prompts Module ===== */
window.NAICharacter = {
    MAX_CHARS: 6,
    characters: [], // [{prompt, uc, row, col}]

    addCharacter() {
        if (this.characters.length >= this.MAX_CHARS) return;
        this.characters.push({
            prompt: '',
            uc: '',
            row: 2,  // 0-indexed, default 3rd row
            col: 2,  // 0-indexed, default 3rd col
        });
        this.render();
    },

    removeCharacter(idx) {
        this.characters.splice(idx, 1);
        this.render();
    },

    isAutoCoords() {
        const cb = $('#char-auto-coords');
        return cb ? cb.checked : true;
    },

    render() {
        const container = $('#char-list');
        container.innerHTML = '';
        const autoCoords = this.isAutoCoords();

        this.characters.forEach((char, idx) => {
            const item = document.createElement('div');
            item.className = 'char-item';

            // Header with remove button
            const header = document.createElement('div');
            header.className = 'char-item-header';
            header.innerHTML = `
                <span class="char-item-title">角色 ${idx + 1}</span>
                <button class="char-remove-btn" title="删除此角色">✕</button>
            `;
            header.querySelector('.char-remove-btn').addEventListener('click', () => this.removeCharacter(idx));
            item.appendChild(header);

            // Prompt textarea
            const promptGroup = document.createElement('div');
            promptGroup.className = 'form-group';
            promptGroup.innerHTML = `
                <label>角色${idx + 1} 提示词</label>
                <textarea class="form-textarea char-prompt" rows="1" placeholder="角色${idx + 1}的提示词...">${char.prompt}</textarea>
            `;
            const promptTA = promptGroup.querySelector('textarea');
            promptTA.addEventListener('input', () => {
                char.prompt = promptTA.value;
                NAIUtils.autoResize(promptTA);
            });
            item.appendChild(promptGroup);
            setTimeout(() => NAIUtils.autoResize(promptTA), 0);

            // UC textarea
            const ucGroup = document.createElement('div');
            ucGroup.className = 'form-group';
            ucGroup.innerHTML = `
                <label>角色${idx + 1} 负面提示词</label>
                <textarea class="form-textarea char-uc" rows="1" placeholder="角色${idx + 1}的负面提示词...">${char.uc}</textarea>
            `;
            const ucTA = ucGroup.querySelector('textarea');
            ucTA.addEventListener('input', () => {
                char.uc = ucTA.value;
                NAIUtils.autoResize(ucTA);
            });
            item.appendChild(ucGroup);
            setTimeout(() => NAIUtils.autoResize(ucTA), 0);

            // 5x5 Grid (only interactive when auto coords is off)
            const gridGroup = document.createElement('div');
            gridGroup.className = 'form-group char-grid-group';
            if (autoCoords) gridGroup.classList.add('disabled');

            const gridLabel = document.createElement('label');
            gridLabel.textContent = `角色${idx + 1} 位置`;
            gridGroup.appendChild(gridLabel);

            const grid = document.createElement('div');
            grid.className = 'char-grid';

            for (let r = 0; r < 5; r++) {
                for (let c = 0; c < 5; c++) {
                    const cell = document.createElement('div');
                    cell.className = 'char-grid-cell';
                    if (r === char.row && c === char.col) {
                        cell.classList.add('selected');
                    }
                    if (!autoCoords) {
                        cell.addEventListener('click', () => {
                            char.row = r;
                            char.col = c;
                            // Update grid selection
                            grid.querySelectorAll('.char-grid-cell').forEach(cl => cl.classList.remove('selected'));
                            cell.classList.add('selected');
                        });
                    }
                    grid.appendChild(cell);
                }
            }
            gridGroup.appendChild(grid);
            item.appendChild(gridGroup);

            container.appendChild(item);
        });

        // Update add button state
        const addBtn = $('#btn-char-add');
        if (addBtn) {
            addBtn.disabled = this.characters.length >= this.MAX_CHARS;
        }
    },

    collectParams() {
        if (this.characters.length === 0) return { characters: [], useCoords: !this.isAutoCoords() };

        const useCoords = !this.isAutoCoords();

        const characters = this.characters.map(char => {
            // x = col * 0.2 + 0.1, y = row * 0.2 + 0.1  (centered in cell)
            const x = parseFloat((char.col * 0.2 + 0.1).toFixed(2));
            const y = parseFloat((char.row * 0.2 + 0.1).toFixed(2));
            return {
                prompt: char.prompt,
                uc: char.uc,
                center: { x, y },
            };
        });

        return { characters, useCoords };
    },

    init() {
        // Toggle
        $('#char-toggle').addEventListener('click', () => {
            const c = $('#char-content');
            const a = $('#char-arrow');
            const open = c.classList.toggle('open');
            a.textContent = open ? '▼' : '▶';
        });

        // Auto coords checkbox
        $('#char-auto-coords').addEventListener('change', () => {
            this.render();
        });

        // Add button
        $('#btn-char-add').addEventListener('click', () => this.addCharacter());
    },
};