@inject IMRBService mrbService
@inject ISnackbar snackbar
@inject ICustomerService customerService

<MudDialog>
    <DialogContent>
        <MudPaper Class="m-2 p-2">
            <MudForm @bind-Errors="@errors">
                <MudSelect T="string"
                           Label="Action"
                           Disabled="@(!string.IsNullOrWhiteSpace(mrbAction.Action))"
                           Required="true"
                           RequiredError="You must select an action!"
                           @bind-Value="@mrbAction.Action"
                           Text="@mrbAction.Action">
                    <MudSelectItem Value="@("Block")" />
                    <MudSelectItem Value="@("Convert")" />
                    <MudSelectItem Value="@("Recall")" />
                    <MudSelectItem Value="@("Scrap")" />
                    <MudSelectItem Value="@("Unblock")" />
                    <MudSelectItem Value="@("Waiver")" />
                </MudSelect>
                @if (mrbAction.Action.Equals("Convert", StringComparison.InvariantCultureIgnoreCase)) {
                    <MudSelect T="string"
                               Label="Convert From Customer"
                               Required
                               Variant="Variant.Outlined"
                               AnchorOrigin="Origin.BottomCenter"
                               @bind-Value=convertFromCustomer
                               Text="@convertFromCustomer">
                        @foreach (string customer in customerNames) {
                            <MudSelectItem Value="@(customer)" />
                        }
                    </MudSelect>
                    <MudTextField @bind-Value="@convertFromPart"
                                  Label="Convert From Part Number"
                                  Required
                                  RequiredError="Part number required!"
                                  Text="@convertFromPart" />
                    <MudSelect T="string"
                               Label="Convert To Customer"
                               Required
                               Variant="Variant.Outlined"
                               AnchorOrigin="Origin.BottomCenter"
                               @bind-Value=convertToCustomer
                               Text="@convertToCustomer">
                        @foreach (string customer in customerNames) {
                            <MudSelectItem Value="@(customer)" />
                        }
                    </MudSelect>
                    <MudTextField @bind-Value="@convertToPart"
                                  Label="Convert To Part Number"
                                  Required
                                  RequiredError="Part number required!"
                                  Text="@convertToPart" />
                } else {
                    <MudSelect T="string"
                               Label="Affected Customer"
                               Required
                               Variant="Variant.Outlined"
                               AnchorOrigin="Origin.BottomCenter"
                               @bind-Value=mrbAction.Customer
                               Text="@mrbAction.Customer">
                        @foreach (string customer in customerNames) {
                            <MudSelectItem Value="@(customer)" />
                        }
                    </MudSelect>
                    <MudAutocomplete T="string"
                                     Label="Part Number"
                                     Variant="Variant.Outlined"
                                     AnchorOrigin="Origin.BottomCenter"
                                     @bind-Value=mrbAction.PartNumber
                                     Text="@mrbAction.PartNumber"
                                     SearchFunc="@PartNumberSearch"
                                     ResetValueOnEmptyText
                                     CoerceText />
                }
                <MudTextField T="int"
                              InputType="@InputType.Number"
                              Label="Qty"
                              Required="true"
                              RequiredError="You must supply a quantity!"
                              @bind-Value=mrbAction.Quantity
                              Text="@mrbAction.Quantity.ToString()" />
                <MudAutocomplete T="string"
                                 Label="Batch Number / Lot Number"
                                 Variant="Variant.Outlined"
                                 AnchorOrigin="Origin.BottomCenter"
                                 @bind-Value=mrbAction.LotNumber
                                 Text="@mrbAction.LotNumber"
                                 SearchFunc="@LotNumberSearch"
                                 ResetValueOnEmptyText
                                 CoerceText />
                @if (mrbAction.Action.Equals("Scrap")) {
                    <MudSelect T="string"
                               Label="Justification"
                               Required
                               RequiredError="Justification required!"
                               Variant="Variant.Outlined"
                               AnchorOrigin="Origin.BottomCenter"
                               @bind-Value=mrbAction.Justification
                               Text="@mrbAction.Justification">
                        <MudSelectItem Value="@("Obsolete")" />
                        <MudSelectItem Value="@("Aged Material")" />
                        <MudSelectItem Value="@("Out of Specification")" />
                    </MudSelect>
                }
            </MudForm>
        </MudPaper>
    </DialogContent>
    <DialogActions>
        <MudButton Variant="Variant.Filled"
                   Color="Color.Tertiary"
                   Class="m1-auto"
                   OnClick=SaveMRBAction>
            @if (processingSave) {
                <MudProgressCircular Class="m-1" Size="Size.Small" Indeterminate="true" />
                <MudText>Processing</MudText>
            } else {
                <MudText>Save</MudText>
            }
        </MudButton>
        @if (mrbAction is not null && mrbAction.ActionID > 0) {
            <MudButton Variant="Variant.Filled"
                       Color="Color.Secondary"
                       Disabled="@(mrbAction is null || (mrbAction is not null && mrbAction.ActionID <= 0))"
                       Class="m1-auto"
                       OnClick=DeleteMRBAction>
                @if (processingDelete) {
                    <MudProgressCircular Class="m-1" Size="Size.Small" Indeterminate="true" />
                    <MudText>Processing</MudText>
                } else {
                    <MudText>Delete</MudText>
                }
            </MudButton>
        }
        <MudButton Variant="Variant.Filled"
                   Class="grey text-black m1-auto"
                   OnClick=Cancel>
            Cancel
        </MudButton>
    </DialogActions>
</MudDialog>

@code {
    [CascadingParameter] MudDialogInstance MudDialog { get; set; }

    [Parameter]
    public MRBAction mrbAction { get; set; }

    private IEnumerable<MRBAction>? actions = null;

    private MRBAction lastAction = null;

    private IEnumerable<string> customerNames = new List<string>();

    private string convertFromCustomer = string.Empty;
    private string convertFromPart = string.Empty;
    private string convertToCustomer = string.Empty;
    private string convertToPart = string.Empty;

    private bool isVisible { get; set; }
    private string[] errors = { };
    private bool processingSave = false;
    private bool processingDelete = false;

    protected override async Task OnParametersSetAsync() {
        isVisible = true;

        if (mrbAction is null) {
            snackbar.Add("MRB action cannot be null", Severity.Warning);
            MudDialog.Cancel();
        } else {
            actions = (await mrbService.GetMRBActionsForMRB(mrbAction.MRBNumber, false)).OrderByDescending(a => a.ActionID);

            if (actions is not null && actions.Count() > 0) {
                if (string.IsNullOrWhiteSpace(mrbAction.Action))
                    mrbAction.Action = actions.First().Action;
                if (string.IsNullOrWhiteSpace(mrbAction.Customer))
                    mrbAction.Customer = actions.First().Customer;
                if (string.IsNullOrWhiteSpace(mrbAction.LotNumber))
                    mrbAction.LotNumber = actions.First().LotNumber;
                if (string.IsNullOrWhiteSpace(mrbAction.PartNumber))
                    mrbAction.PartNumber = actions.First().PartNumber;
                if (string.IsNullOrWhiteSpace(mrbAction.Justification))
                    mrbAction.Justification = actions.First().Justification;
                if (mrbAction.Quantity == 0)
                    mrbAction.Quantity = actions.First().Quantity;

                if (mrbAction.Action.Equals("Convert", StringComparison.InvariantCultureIgnoreCase)) {
                    string[] convertFrom = actions.First().ConvertFrom.Split(" ");
                    if (convertFrom.Length > 1) {
                        convertFromCustomer = convertFrom[0];
                        foreach (string partStr in convertFrom.Skip(1))
                            convertFromPart += partStr;
                    }

                    string[] convertTo = actions.First().ConvertTo.Split(" ");
                    if (convertTo.Length > 1) {
                        convertToCustomer = convertTo[0];
                        foreach (string partStr in convertTo.Skip(1))
                            convertToPart += partStr;
                    }
                }
            }
        }

        if (customerNames is null || customerNames.Count() <= 0)
            customerNames = await customerService.GetAllCustomerNames();

        StateHasChanged();
    }

    private bool FormIsValid() {
        bool actionIsValid = mrbAction.Action.Equals("Block") || mrbAction.Action.Equals("Convert") ||
            mrbAction.Action.Equals("Other") || mrbAction.Action.Equals("Recall") || mrbAction.Action.Equals("Scrap") ||
            mrbAction.Action.Equals("Unblock") || mrbAction.Action.Equals("Waiver");
        actionIsValid = actionIsValid && !string.IsNullOrWhiteSpace(mrbAction.Customer) &&
            !string.IsNullOrWhiteSpace(mrbAction.PartNumber) &&
            !string.IsNullOrWhiteSpace(mrbAction.LotNumber);
        actionIsValid = actionIsValid && mrbAction.Quantity > 0;

        if (mrbAction.Action.Equals("Convert", StringComparison.InvariantCultureIgnoreCase)) {
            actionIsValid = actionIsValid && !string.IsNullOrWhiteSpace(convertFromCustomer) &&
                !string.IsNullOrWhiteSpace(convertFromPart) &&
                !string.IsNullOrWhiteSpace(convertToCustomer) &&
                !string.IsNullOrWhiteSpace(convertToPart);
        }

        if (mrbAction.Action.Equals("Scrap", StringComparison.InvariantCultureIgnoreCase))
            actionIsValid = actionIsValid && !string.IsNullOrWhiteSpace(mrbAction.Justification);

        return actionIsValid;
    }

    private async void SaveMRBAction() {
        processingSave = true;
        try {
            if (!FormIsValid()) throw new Exception("You must complete the form before saving!");

            if (mrbAction.Action.Equals("Convert", StringComparison.InvariantCultureIgnoreCase)) {
                mrbAction.ConvertFrom = $"{convertFromCustomer} {convertFromPart}";
                mrbAction.ConvertTo = $"{convertToCustomer} {convertToPart}";
            }

            if (mrbAction.MRBNumber > 0) {
                if (mrbAction.ActionID <= 0) {
                    await mrbService.CreateMRBAction(mrbAction);
                    snackbar.Add("MRB action created", Severity.Success);
                } else {
                    await mrbService.UpdateMRBAction(mrbAction);
                    snackbar.Add("MRB action updated", Severity.Success);
                }

                actions = (await mrbService.GetMRBActionsForMRB(mrbAction.MRBNumber, true)).OrderByDescending(a => a.ActionID);
            } else {
                snackbar.Add("MRB action saved", Severity.Success);
            }

            StateHasChanged();

            MudDialog.Close(DialogResult.Ok(mrbAction));
        } catch (Exception ex) {
            snackbar.Add(ex.Message, Severity.Error);
        }
        processingSave = false;
    }

    private async void DeleteMRBAction() {
        processingDelete = true;
        try {
            if (mrbAction is null) throw new Exception("MRB action cannot be null!");
            if (mrbAction.ActionID <= 0)
                throw new Exception("You cannot delete an action before creating it!");
            if (mrbAction.MRBNumber <= 0)
                throw new Exception("Invalid MRB number!");

            await mrbService.DeleteMRBAction(mrbAction);
            snackbar.Add("MRB action successfully deleted", Severity.Success);

            StateHasChanged();

            MudDialog.Close(DialogResult.Ok<MRBAction>(null));
        } catch (Exception ex) {
            snackbar.Add(ex.Message, Severity.Error);
        }
        processingDelete = false;
    }

    private void Cancel() {
        MudDialog.Cancel();
    }

    private async Task<IEnumerable<string>> PartNumberSearch(string value, CancellationToken token) {
        if (actions is null) return new List<string> { value };

        if (string.IsNullOrWhiteSpace(value)) return new string[0];

        HashSet<string> partNumbers = new();

        partNumbers.Add(value);

        foreach (MRBAction action in actions) {
            if (action.PartNumber.Contains(value, StringComparison.InvariantCultureIgnoreCase))
                partNumbers.Add(action.PartNumber);
        }

        return partNumbers;
    }

    private async Task<IEnumerable<string>> LotNumberSearch(string value, CancellationToken token) {
        if (actions is null) return new List<string> { value };

        if (string.IsNullOrWhiteSpace(value)) return new string[0];

        HashSet<string> lotNumbers = new();

        lotNumbers.Add(value);

        foreach (MRBAction action in actions) {
            if (action.LotNumber.Contains(value, StringComparison.InvariantCultureIgnoreCase))
                lotNumbers.Add(action.LotNumber);
        }

        return lotNumbers;
    }
}