import { global } from "../../utility";
// import { nullOrEmpty } from "../../utility/strings";
import { createElement } from "../../functions";
import { createIcon } from "../icon";
import { createCheckbox } from "../checkbox";
// import { setTooltip } from "../tooltip";
import { Dropdown } from "../dropdown";

export class GridColumn {
    static create() {
        return createElement('span');
    }

    static setValue(element, val) {
        element.innerText = val;
    }

    static setStyle(element, style) {
        for (let css of Object.entries(style)) {
            element.style.setProperty(css[0], css[1]);
        }
    }

    static setEnabled(element, enabled) {
        const tooltip = element.querySelector('.ui-tooltip-wrapper');
        if (tooltip != null) {
            tooltip.style.display = enabled === false ? 'none' : '';
        }
    }
}

export class GridInputColumn extends GridColumn {
    static get editing() { return true };

    static createEdit(trigger, col, _parent, vals) {
        const input = createElement('input');
        input.setAttribute('type', 'text');
        if (typeof trigger === 'function') {
            input.addEventListener('change', trigger);
        }
        input.addEventListener('input', () => {
            if (vals.__editing == null) {
                vals.__editing = {
                    [col.key]: true
                }
            } else {
                vals.__editing[col.key] = true;
            }
        });
        return input;
    }

    static setValue(element, val) {
        if (element.tagName !== 'INPUT') {
            super.setValue(element, val);
        } else {
            element.value = val;
        }
    }

    static getValue(e) { return e.target.value }

    static setEnabled(element, enabled) {
        super.setEnabled(element , enabled);
        element.disabled = enabled === false;
    }
}

export class GridTextColumn extends GridInputColumn {
    static createEdit(trigger, col, _parent, vals) {
        const input = createElement('textarea');
        if (typeof trigger === 'function') {
            input.addEventListener('change', trigger);
        }
        input.addEventListener('input', () => {
            if (vals.__editing == null) {
                vals.__editing = {
                    [col.key]: true
                }
            } else {
                vals.__editing[col.key] = true;
            }
        });
        return input;
    }

    static setValue(element, val, _item, _col, grid) {
        if (element.tagName !== 'TEXTAREA') {
            super.setValue(element, val);
        } else {
            element.value = val;
            if (val != null) {
                const lines = String(val).split('\n').length;
                element.style.height = `${lines * grid.lineHeight + 12}px`;
            }
            // TODO: bad performance
        }
    }
}

const SymbolDropdown = Symbol.for('ui-dropdown');

export class GridDropdownColumn extends GridColumn {
    static createEdit(trigger, col, parent) {
        const drop = new Dropdown({
            ...col.dropOptions,
            parent,
            holder: parent
        });
        drop.onselected = trigger;
        return drop.create();
    }

    static _getDrop(element) {
        const dropGlobal = global[SymbolDropdown];
        if (dropGlobal == null) {
            return null;
        }
        const dropId = element.dataset.dropId;
        const drop = dropGlobal[dropId];
        if (drop == null) {
            return null;
        }
        return drop;
    }

    static _getSource(item, col) {
        let source = col.source;
        if (typeof source === 'function') {
            source = source(item);
        }
        return source;
    }

    static _setValue(source, element, val) {
        const data = source?.find(v => v.value === val);
        if (data != null) {
            val = data.text;
        }
        super.setValue(element, val);
    }

    static setValue(element, val, item, col) {
        if (element.tagName !== 'DIV') {
            let source = this._getSource(item, col);
            if (source instanceof Promise) {
                source.then(s => this._setValue(s, element, val));
            } else {
                this._setValue(source, element, val);
            }
            return;
        }
        const drop = this._getDrop(element);
        if (drop == null) {
            return;
        }
        if (drop.source == null || drop.source.length === 0) {
            let source = this._getSource(item, col);
            if (source instanceof Promise) {
                source.then(s => {
                    drop.source = s;
                    drop.select(val, true);
                })
                return;
            } else if (source != null) {
                drop.source = source;
            }
        }
        drop.select(val, true);
    }

    static getValue(e) {
        return e.value;
    }

    static setEnabled(element, enabled) {
        super.setEnabled(element , enabled);
        const drop = this._getDrop(element);
        if (drop == null) {
            return;
        }
        drop.disabled = enabled === false;
    }
}

export class GridCheckboxColumn extends GridColumn {
    static createEdit(trigger) {
        const check = createCheckbox({
            onchange: typeof trigger === 'function' ? trigger : null
        });
        return check;
    }

    static setValue(element, val) {
        element.querySelector('input').checked = val;
    }

    static getValue(e) { return e.target.checked }

    static setEnabled(element, enabled) {
        super.setEnabled(element , enabled);
        element.querySelector('input').disabled = enabled === false;
    }
}

export class GridIconColumn extends GridColumn {
    static create() { return createElement('span', 'col-icon') }

    static setValue(element, val, item, col, grid) {
        let className = col.className;
        if (typeof className === 'function') {
            className = className.call(col, item);
        }
        if (className == null) {
            element.className = 'col-icon';
        } else {
            element.className = `col-icon ${className}`;
        }
        let type = col.iconType;
        if (typeof type === 'function') {
            type = type.call(col, item);
        }
        type ??= 'fa-regular';
        if (element.dataset.type !== type || element.dataset.icon !== val) {
            const icon = createIcon(type, val);
            // const layer = element.children[0];
            element.replaceChildren(icon);
            // !nullOrEmpty(col.tooltip) && setTooltip(element, col.tooltip, false, grid.element);
            element.dataset.type = type;
            element.dataset.icon = val;
        }
    }

    static setEnabled(element, enabled) {
        super.setEnabled(element , enabled);
        if (enabled === false) {
            element.classList.add('disabled');
        } else {
            element.classList.remove('disabled');
        }
    }
}