import React, { Component, PropTypes } from 'react';
import { Link } from 'react-router';
import { connect } from 'react-redux';
import { Map, fromJS, OrderedMap } from 'immutable';
import { reduxForm, initialize } from 'redux-form';

// components
import ErrorMessage from 'trc-client-core/src/components/ErrorMessage';
import ErrorList from 'trc-client-core/src/components/ErrorList';
import Grid from 'trc-client-core/src/components/Grid';
import Col from 'trc-client-core/src/components/Col';
import Widget from 'trc-client-core/src/components/Widget';
import CourseSelect from 'trc-client-core/src/components/CourseSelect';
import SortableFieldArray from 'trc-client-core/src/components/SortableFieldArray';

import FormError from 'trc-client-core/src/forms/FormError';

import Input from 'bd-stampy/components/InputElement';
import Label from 'bd-stampy/components/Label';
import Textarea from 'bd-stampy/components/Textarea';
import Fieldset from 'bd-stampy/components/Fieldset';
import InputRow from 'bd-stampy/components/InputRow';

import Select from 'toyota-styles/lib/components/Select';
import Button from 'bd-stampy/components/Button';

import PATHWAY_TYPE_OPTIONS from 'trc-client-core/src/constants/PathwayTypes';
import DEPARTMENT_OPTIONS from 'trc-client-core/src/constants/Departments';

const LEARNING_PLAN_FORM_NAME = 'learningPlanForm';

//
// fields in form
//

export const LEARNING_PLAN_FORM_FIELDS = [
    'careerPlanId',
    'brand',
    'pathwayType',
    'displayName',
    'visible',
    'displayText.headerText',
    'displayText.footerText',
    'displayText.additonalResource',
    'segments[].name',
    'segments[].courses[].courseCode',
    'accessRule.jobPositionId',
    'accessRule.departments',
    'certifications[].name',
    'certifications[].courses[].itemCode',
    'certifications[].courses[].itemName'
];

class AdminLearningPlanForm extends Component {

    submitForm(values, dispatch) {
        this.props.onSubmitForm(values, dispatch);
        this.setCurrentFormDataAsDefault();
    }

    resetForm(ee) {
        ee.preventDefault();
        if(this.props.onResetClick) {
            this.props.onResetClick(() => {
                this.props.resetForm();
            });
        } else {
            this.props.resetForm();
        }
        return false;
    }

    close(ee) {
        ee.preventDefault();
        this.props.onCloseClick(ee, this.props.dirty);
    }

    setCurrentFormDataAsDefault() {
        this.props.dispatch(initialize(LEARNING_PLAN_FORM_NAME, this.props.values, LEARNING_PLAN_FORM_FIELDS));
    }

    //
    // render
    //

    render() {
        const {
            fields: {
                displayName,
                careerPlanId,
                brand,
                pathwayType,
                visible,
                displayText,
                segments,
                certifications,
                accessRule: {
                    jobPositionId,
                    departments
                }
            },
            handleSubmit,
            courses,
            jobPositions,
            onDeleteClick,
            savesToExisting,
            copiesExisting,
            isSaving,
            isDeleting,
            dirty,
            errors
        } = this.props;

        return (
            <form onSubmit={handleSubmit(this.submitForm.bind(this))}>
                <p>
                    <Button onClick={this.close.bind(this)} modifier="grey">Cancel</Button>&nbsp;
                    <Button type="submit" modifier="edit" disabled={isSaving || isDeleting}>{copiesExisting ? "Save new copy" : "Save"}</Button>&nbsp;
                    <Button onClick={this.resetForm.bind(this)} modifier="edit" disabled={!dirty || isSaving || isDeleting}>Reset</Button>&nbsp;
                    <Button onClick={onDeleteClick} modifier="edit" disabled={!savesToExisting || isSaving || isDeleting}>Delete</Button>
                </p>
                <ErrorList {...this.props} />

                <Fieldset legend="General">

                    <Input type="hidden" {...brand} />

                    <InputRow label="Display name">
                        <Input type="text" {...displayName} />
                        <FormError {...displayName} />
                    </InputRow>

                    {savesToExisting &&
                    <InputRow label="Learning plan ID">
                        <Input type="text" disabled {...careerPlanId} />
                        <FormError {...careerPlanId} />
                    </InputRow>}

                    <InputRow label="Pathway type">
                        <Select onChangeString options={PATHWAY_TYPE_OPTIONS} {...pathwayType} />
                        <FormError {...pathwayType} />
                    </InputRow>

                    <InputRow label="Assigned">
                        <Input type="checkbox" {...visible} />
                        <FormError {...visible} />
                    </InputRow>

                </Fieldset>

                <Fieldset legend="Content">

                    <InputRow label="Header text">
                        <Textarea {...displayText.headerText} rows="9" />
                        <FormError {...displayText.headerText} />
                    </InputRow>

                    <InputRow label="Footer text">
                        <Textarea {...displayText.footerText} rows="9" />
                        <FormError {...displayText.footerText} />
                    </InputRow>

                    <InputRow label="Additional resources">
                        <Textarea {...displayText.additonalResource} rows="9" />
                        <FormError {...displayText.additonalResource} />
                    </InputRow>

                </Fieldset>

                <Fieldset legend="Access">


                    <InputRow label="Job positions">
                        <Select onChangeString multi {...jobPositionId} options={jobPositions} />
                        <FormError {...jobPositionId} />
                    </InputRow>

                    <InputRow label="Departments">
                        <Select onChangeString multi {...departments} options={DEPARTMENT_OPTIONS} />
                        <FormError {...departments} />
                    </InputRow>

                </Fieldset>

                <Fieldset legend="Courses">
                    <SortableFieldArray items={segments} itemName="segment" modifier="large">
                        {segments.map((segment, index) =>
                            <div>                            
                                <InputRow label="Segment name">
                                    <Input type="text" {...segment.name} />
                                    <FormError {...segment.name} />
                                </InputRow>
                                <InputRow label="Courses">
                                    <SortableFieldArray items={segment.courses} itemName="course">
                                        {segment.courses.map((course, index) =>
                                            <div>
                                                <CourseSelect onChangeString {...course.courseCode} className="hug-bottom" courses={courses} />
                                                <FormError {...course.courseCode} />
                                            </div>
                                        )}
                                    </SortableFieldArray>
                                </InputRow>
                            </div>
                        )}
                    </SortableFieldArray>
                </Fieldset>

                <Fieldset legend="Certification map">
                    <SortableFieldArray items={certifications} itemName="certifications" modifier="large">
                        {certifications.map((segment, index) =>
                            <div>
                                <InputRow label="Segment name">
                                    <Input type="text" {...segment.name}/>
                                    <FormError {...segment.name} />
                                    <FormError {...segment.coursesError} />
                                </InputRow>
                                <InputRow label="Items">
                                    <SortableFieldArray items={segment.courses}>
                                        {segment.courses.map((course, index) =>
                                            <Grid>
                                                <Col width={6}>
                                                    <Input type="text" className="hug-bottom" placeholder="ABC123" {...course.itemCode} />
                                                    <FormError {...course.itemCode} />
                                                </Col>
                                                <Col width={6}>
                                                    <Input type="text" className="hug-bottom" {...course.itemName} />
                                                    <FormError {...course.itemName} />
                                                </Col>
                                            </Grid>
                                        )}
                                    </SortableFieldArray>
                                </InputRow>
                            </div>
                        )}
                    </SortableFieldArray>
                </Fieldset>

                <p>
                    <Button onClick={this.close.bind(this)} modifier="grey">Cancel</Button>&nbsp;
                    <Button type="submit" modifier="edit" disabled={isSaving || isDeleting}>{copiesExisting ? "Save new copy" : "Save"}</Button>&nbsp;
                    <Button onClick={this.resetForm.bind(this)} modifier="edit" disabled={!dirty || isSaving || isDeleting}>Reset</Button>&nbsp;
                    <Button onClick={onDeleteClick} modifier="edit" disabled={!savesToExisting || isSaving || isDeleting}>Delete</Button>
                </p>
                <ErrorList {...this.props} />

            </form>
        );
    }
}

AdminLearningPlanForm.propTypes = {
    initialValues: PropTypes.object,
    courses: PropTypes.array,
    jobPositions: PropTypes.array,
    onDeleteClick: PropTypes.func,
    savesToExisting: PropTypes.bool,
    copiesExisting: PropTypes.bool,
    isSaving: PropTypes.bool,
    isDeleting: PropTypes.bool
};

//
// validation
//

const AdminLearningPlanFormValidation = function(data) {
    const errors = {
        segments: [],
        certifications: []
    };
    if(!data.displayName || data.displayName.trim()=="") {
        errors.displayName = 'You must supply a display name';
    }
    data.segments.map((seg, ii) => {
        if(!seg.name || seg.name.trim()=="") {
            errors.segments[ii] = {
                name: 'You must supply a segment name for course segment #'+(ii+1)
            };
        }
    });
    data.certifications.map((cert, ii) => {
        var certErrors = {};
        if(!cert.name || cert.name.trim()=="") {
            certErrors.name = 'You must supply a segment name for certification segment #'+(ii+1);
        }
        errors.certifications[ii] = certErrors;
    });
    return errors;
}

//
// redux form
//

export default reduxForm({
    form: LEARNING_PLAN_FORM_NAME,
    fields: LEARNING_PLAN_FORM_FIELDS,
    validate: AdminLearningPlanFormValidation

},
(state, props) => {
    return {
        initialValues: props.initialValues
    };
}

)(AdminLearningPlanForm);