/// <reference path="./view.ts" />
/// <reference path="./nodes/moduleView.ts" />
/// <reference path="./nodes/portView.ts" />

namespace pxsim.visuals {
    export const BRICK_HEIGHT_RATIO = 1 / 3;
    export const MODULE_AND_WIRING_HEIGHT_RATIO = 1 / 3; // For inputs and outputs

    export const MODULE_HEIGHT_RATIO = MODULE_AND_WIRING_HEIGHT_RATIO * 4 / 5;
    export const WIRING_HEIGHT_RATIO = MODULE_AND_WIRING_HEIGHT_RATIO / 5;

    export const MODULE_INNER_PADDING_RATIO = 1 / 35;

    export const MAX_MODULE_WIDTH = 100;

    export interface LayoutElement extends View {
        getId(): number;
        getPort(): number;
        getPaddingRatio(): number;
        getWiringRatio(): number;
    }

    export class LayoutView extends ViewContainer {
        private inputs: LayoutElement[] = [];
        private outputs: LayoutElement[] = [];

        private inputContainers: ViewContainer[] = [];
        private outputContainers: ViewContainer[] = [];

        private inputControls: View[] = [];
        private outputControls: View[] = [];

        private inputCloseIcons: View[] = [];
        private outputCloseIcons: View[] = [];

        private inputWires: WireView[] = [];
        private outputWires: WireView[] = [];

        private brick: BrickView;
        private offsets: number[];
        private contentGroup: SVGGElement;
        private scrollGroup: SVGGElement;
        private renderedViews: Map<boolean> = {};
        private hasDimensions = false;

        constructor() {
            super();

            this.outputContainers = [new ViewContainer(), new ViewContainer, new ViewContainer(), new ViewContainer()];
            this.inputContainers = [new ViewContainer(), new ViewContainer, new ViewContainer(), new ViewContainer()];

            this.brick = new BrickView(0);

            for (let port = 0; port < DAL.NUM_OUTPUTS; port++) {
                this.outputWires[port] = new WireView(port);
            }
            for (let port = 0; port < DAL.NUM_INPUTS; port++) {
                this.inputWires[port] = new WireView(port);
            }
        }

        public layout(width: number, height: number) {
            this.hasDimensions = true;
            this.resize(width, height);
            this.scrollGroup.setAttribute("width", width.toString());
            this.scrollGroup.setAttribute("height", height.toString());
            this.position();
        }

        public setBrick(brick: BrickView) {
            this.brick = brick;
            this.brick.inject(this.scrollGroup);
            this.position();
        }

        public getBrick() {
            return this.brick;
        }

        public setInput(port: number, view: LayoutElement, control?: View, closeIcon?: View) {
            if (this.inputs[port] != view || this.inputControls[port] != control) {
                if (this.inputs[port]) {
                    // Remove current input
                    this.inputs[port].dispose();
                }
                this.inputs[port] = view;
                if (this.inputControls[port]) {
                    this.inputControls[port].dispose();
                }
                this.inputControls[port] = control;
                this.inputCloseIcons[port] = closeIcon;

                this.inputContainers[port].clear();
                this.inputContainers[port].addView(view);

                if (control) this.inputContainers[port].addView(control);

                if (view.hasClick()) view.registerClick((ev: any) => {
                    view.setSelected(true);
                    runtime.queueDisplayUpdate();
                }, true);

                if (control && closeIcon) {
                    this.inputContainers[port].addView(closeIcon);
                    closeIcon.registerClick(() => {
                        // Clear selection
                        view.setSelected(false);
                        runtime.queueDisplayUpdate();
                    })
                }
            }

            this.position();
        }

        public setOutput(port: number, view: LayoutElement, control?: View, closeIcon?: View) {
            if (this.outputs[port] != view || this.outputControls[port] != control) {
                if (this.outputs[port]) {
                    // Remove current output
                    this.outputs[port].dispose();
                }
                this.outputs[port] = view;
                if (this.outputControls[port]) {
                    this.outputControls[port].dispose();
                }
                this.outputControls[port] = control;
                this.outputCloseIcons[port] = closeIcon;

                this.outputContainers[port].clear();
                this.outputContainers[port].addView(view);

                if (control) this.outputContainers[port].addView(control);

                if (view.hasClick()) view.registerClick((ev: any) => {
                    view.setSelected(true);
                    runtime.queueDisplayUpdate();
                }, true)

                if (control && closeIcon) {
                    this.outputContainers[port].addView(closeIcon);
                    closeIcon.registerClick(() => {
                        // Clear selection
                        view.setSelected(false);
                        runtime.queueDisplayUpdate();
                    })
                }
            }

            this.position();
        }

        protected buildDom() {
            this.contentGroup = svg.elt("g") as SVGGElement;
            this.scrollGroup = svg.child(this.contentGroup, "g") as SVGGElement;

            this.inputs = [];
            this.outputs = [];
            this.inputControls = [];
            this.outputControls = [];

            // Inject all wires
            for (let port = 0; port < DAL.NUM_OUTPUTS; port++) {
                this.outputWires[port].inject(this.scrollGroup);
            }
            for (let port = 0; port < DAL.NUM_INPUTS; port++) {
                this.inputWires[port].inject(this.scrollGroup);
            }

            // Inject all view containers
            for (let i = 0; i < 4; i++) {
                this.inputContainers[i].inject(this.scrollGroup);
                this.outputContainers[i].inject(this.scrollGroup);
            }

            // Inject all ports
            this.setInput(0, new PortView(0, 'A'));
            this.setInput(1, new PortView(1, 'B'));
            this.setInput(2, new PortView(2, 'C'));
            this.setInput(3, new PortView(3, 'D'));

            this.setOutput(0, new PortView(0, '1'));
            this.setOutput(1, new PortView(1, '2'));
            this.setOutput(2, new PortView(2, '3'));
            this.setOutput(3, new PortView(3, '4'));

            return this.contentGroup;
        }

        public getInnerWidth() {
            if (!this.hasDimensions) {
                return 0;
            }
            return this.width;
        }

        public getInnerHeight() {
            if (!this.hasDimensions) {
                return 0;
            }
            return this.height;
        }

        public updateTheme(theme: IBoardTheme) {
            this.inputs.forEach(n => {
                n.updateTheme(theme);
            })
            this.brick.updateTheme(theme);
            this.outputs.forEach(n => {
                n.updateTheme(theme);
            })
        }

        private position() {
            if (!this.hasDimensions) {
                return;
            }

            this.offsets = [];

            const contentWidth = this.width;
            if (!contentWidth) return;
            const contentHeight = this.height;
            if (!contentHeight) return;

            const noConnections = this.outputs.concat(this.inputs).filter(m => m.getId() != NodeType.Port).length == 0;

            if (noConnections) {
                // No connections render the entire board
                this.brick.resize(contentWidth, contentHeight);
                this.brick.translate(0, 0);

                // Hide all other connections
                this.outputs.concat(this.inputs).forEach(m => m.setVisible(false));
                return;
            } else {
                this.outputs.concat(this.inputs).forEach(m => m.setVisible(true));
            }

            const moduleHeight = this.getModuleHeight();

            const brickHeight = this.getBrickHeight();
            const brickWidth = this.brick.getInnerWidth() / this.brick.getInnerHeight() * brickHeight;
            const brickPadding = (contentWidth - brickWidth) / 2;

            const modulePadding = this.getModulePadding();
            const moduleSpacing = contentWidth / 4;
            const moduleWidth = this.getInnerModuleWidth();
            let currentX = this.getModulePadding();
            let currentY = 0;
            this.outputs.forEach((n, i) => {
                this.outputContainers[i].translate(currentX, currentY);
                if (this.outputs[i]) {
                    const view = this.outputs[i];
                    const outputPadding = this.getInnerModuleWidth() * view.getPaddingRatio();
                    const desiredOutputWidth = this.getInnerModuleWidth() - outputPadding * 2;
                    const outputWidth = Math.min(desiredOutputWidth, MAX_MODULE_WIDTH);
                    const outputHeight = this.getModuleHeight();

                    // Translate and resize view
                    view.resize(outputWidth, outputHeight);
                    const viewHeight = view.getInnerHeight() / view.getInnerWidth() * outputWidth;
                    view.translate(outputPadding + ((desiredOutputWidth - outputWidth) / 2), outputHeight - viewHeight, true);

                    // Resize control
                    const control = this.outputControls[i];
                    if (control) {
                        control.resize(this.getInnerModuleWidth(), outputHeight);

                        // Translate close icon
                        const closeIcon = this.outputCloseIcons[i];
                        if (closeIcon) {
                            const closeIconWidth = closeIcon.getWidth();
                            closeIcon.translate(this.getInnerModuleWidth() / 2 - closeIconWidth / 2, 0);
                        }
                    }
                }
                currentX += moduleSpacing;
            })

            currentX = 0;
            currentY = moduleHeight;

            const wireBrickSpacing = brickWidth / 5;
            const wiringYPadding = 5;
            let wireStartX = 0;
            let wireEndX = brickPadding + wireBrickSpacing;
            let wireEndY = currentY + this.getWiringHeight() + wiringYPadding;
            let wireStartY = currentY - wiringYPadding;

            // Draw output lines
            for (let port = 0; port < DAL.NUM_OUTPUTS; port++) {
                this.outputWires[port].updateDimensions(wireStartX + moduleSpacing * this.outputs[port].getWiringRatio(), wireStartY, wireEndX, wireEndY);
                this.outputWires[port].setSelected(this.outputs[port].getId() == NodeType.Port);
                wireStartX += moduleSpacing;
                wireEndX += wireBrickSpacing;
            }

            currentX = brickPadding;
            currentY += this.getWiringHeight();

            // Render the brick in the middle
            this.brick.resize(brickWidth, brickHeight);
            this.brick.translate(currentX, currentY);

            currentX = modulePadding;
            currentY += brickHeight + this.getWiringHeight();

            this.inputs.forEach((n, i) => {
                this.inputContainers[i].translate(currentX, currentY);
                if (this.inputs[i]) {
                    const view = this.inputs[i];
                    const inputPadding = this.getInnerModuleWidth() * view.getPaddingRatio();
                    const desiredInputWidth = this.getInnerModuleWidth() - inputPadding * 2;
                    const inputWidth = Math.min(desiredInputWidth, MAX_MODULE_WIDTH);
                    const inputHeight = this.getModuleHeight();

                    // Translate and resize view
                    view.resize(inputWidth, inputHeight);
                    view.translate(inputPadding + ((desiredInputWidth - inputWidth) / 2), 0, true);

                    // Resize control
                    const control = this.inputControls[i];
                    if (control) {
                        control.resize(this.getInnerModuleWidth(), inputHeight);

                        // Translate and resize close icon
                        const closeIcon = this.inputCloseIcons[i];
                        if (closeIcon) {
                            const closeIconWidth = closeIcon.getWidth();
                            const closeIconHeight = closeIcon.getHeight();
                            closeIcon.translate(this.getInnerModuleWidth() / 2 - closeIconWidth / 2, this.getModuleHeight() - closeIconHeight);
                        }
                    }
                }
                currentX += moduleSpacing;
            })

            wireStartX = moduleSpacing / 2;
            wireEndX = brickPadding + wireBrickSpacing;
            wireEndY = currentY - this.getWiringHeight() - wiringYPadding;
            wireStartY = currentY + wiringYPadding;

            // Draw input lines
            for (let port = 0; port < DAL.NUM_INPUTS; port++) {
                this.inputWires[port].updateDimensions(wireStartX, wireStartY, wireEndX, wireEndY);
                this.inputWires[port].setSelected(this.inputs[port].getId() == NodeType.Port);
                wireStartX += moduleSpacing;
                wireEndX += wireBrickSpacing;
            }
        }

        public getBrickHeight() {
            return this.height * BRICK_HEIGHT_RATIO;
        }

        public getWiringHeight() {
            return this.height * WIRING_HEIGHT_RATIO;
        }

        public getModuleBounds() {
            return {
                width: this.width / 4,
                height: this.getModuleHeight()
            }
        }

        public getModulePadding() {
            return this.getModuleBounds().width / 35;
        }

        public getInnerModuleWidth() {
            return this.getModuleBounds().width - (this.getModulePadding() * 2);
        }

        public getModuleHeight() {
            return this.height * MODULE_HEIGHT_RATIO;
        }
    }
}