using System.Security.Claims;
using Campaign_Tracker.Server.Audit;
using Campaign_Tracker.Server.Authorization;
using Campaign_Tracker.Server.Municipalities;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;

namespace Campaign_Tracker.Server.Controllers;

[ApiController]
[Authorize(Policy = ApplicationPolicy.ClientServicesAccess)]
[Route("api/municipalities/{profileId}/addresses")]
public sealed class MunicipalityAddressesController : ControllerBase
{
    private readonly IMunicipalityAddressRepository _addresses;
    private readonly IAuditService _audit;
    private readonly TimeProvider _timeProvider;

    public MunicipalityAddressesController(
        IMunicipalityAddressRepository addresses,
        IAuditService audit,
        TimeProvider timeProvider)
    {
        _addresses = addresses;
        _audit = audit;
        _timeProvider = timeProvider;
    }

    [HttpGet]
    public async Task<ActionResult<IReadOnlyList<MunicipalityAddressResponse>>> GetAll(
        string profileId,
        CancellationToken cancellationToken)
    {
        var addresses = await _addresses.GetByProfileIdAsync(profileId, cancellationToken);
        return Ok(addresses.Select(MunicipalityAddressResponse.From).ToArray());
    }

    [HttpGet("{addressId}")]
    public async Task<ActionResult<MunicipalityAddressResponse>> GetById(
        string profileId,
        string addressId,
        CancellationToken cancellationToken)
    {
        var address = await _addresses.GetByIdAsync(addressId, cancellationToken);
        return address is null ? NotFound() : Ok(MunicipalityAddressResponse.From(address));
    }

    [HttpPost]
    public async Task<ActionResult<MunicipalityAddressResponse>> Add(
        string profileId,
        [FromBody] AddMunicipalityAddressRequest request,
        CancellationToken cancellationToken)
    {
        var actor = GetActor();
        var result = await _addresses.AddAsync(
            profileId,
            request.AddressType,
            request.Street,
            request.City,
            request.State,
            request.ZipCode,
            request.EffectiveDate,
            actor,
            cancellationToken);

        if (!result.Saved || result.Address is null)
            return UnprocessableEntity(new MunicipalityAddressProblem(result.Error ?? "Save failed."));

        _audit.Record(new AuditEvent(
            EventType: "MUNICIPALITY_ADDRESS_ADDED",
            ActorIdentity: actor,
            Resource: $"municipalities/{profileId}/addresses/{result.Address.AddressId}",
            Outcome: $"added {result.Address.AddressType} address",
            TraceIdentifier: HttpContext.TraceIdentifier,
            RecordedAt: _timeProvider.GetUtcNow()));

        return CreatedAtAction(nameof(GetById),
            new { profileId, addressId = result.Address.AddressId },
            MunicipalityAddressResponse.From(result.Address));
    }

    [HttpPut("{addressId}")]
    public async Task<ActionResult<MunicipalityAddressResponse>> Update(
        string profileId,
        string addressId,
        [FromBody] UpdateMunicipalityAddressRequest request,
        CancellationToken cancellationToken)
    {
        var actor = GetActor();
        var result = await _addresses.UpdateAsync(
            addressId,
            request.AddressType,
            request.Street,
            request.City,
            request.State,
            request.ZipCode,
            request.EffectiveDate,
            actor,
            cancellationToken);

        if (!result.Saved || result.Address is null)
        {
            if (result.IsNotFound)
                return NotFound(new MunicipalityAddressProblem(result.Error ?? "Address not found."));
            return UnprocessableEntity(new MunicipalityAddressProblem(result.Error ?? "Update failed."));
        }

        _audit.Record(new AuditEvent(
            EventType: "MUNICIPALITY_ADDRESS_UPDATED",
            ActorIdentity: actor,
            Resource: $"municipalities/{profileId}/addresses/{addressId}",
            Outcome: $"updated {result.Address.AddressType} address — new record {result.Address.AddressId}",
            TraceIdentifier: HttpContext.TraceIdentifier,
            RecordedAt: _timeProvider.GetUtcNow()));

        return Ok(MunicipalityAddressResponse.From(result.Address));
    }

    [HttpDelete("{addressId}")]
    public async Task<IActionResult> Delete(
        string profileId,
        string addressId,
        CancellationToken cancellationToken)
    {
        var actor = GetActor();
        var result = await _addresses.SoftDeleteAsync(addressId, actor, cancellationToken);

        if (!result.Saved)
            return result.IsNotFound ? NotFound() : UnprocessableEntity();

        _audit.Record(new AuditEvent(
            EventType: "MUNICIPALITY_ADDRESS_DELETED",
            ActorIdentity: actor,
            Resource: $"municipalities/{profileId}/addresses/{addressId}",
            Outcome: "soft-deleted",
            TraceIdentifier: HttpContext.TraceIdentifier,
            RecordedAt: _timeProvider.GetUtcNow()));

        return NoContent();
    }

    private string GetActor() =>
        User.Identity?.Name
        ?? User.FindFirstValue(ClaimTypes.NameIdentifier)
        ?? "unknown";
}

public sealed record AddMunicipalityAddressRequest(
    string AddressType,
    string Street,
    string City,
    string State,
    string ZipCode,
    DateTimeOffset EffectiveDate);

public sealed record UpdateMunicipalityAddressRequest(
    string AddressType,
    string Street,
    string City,
    string State,
    string ZipCode,
    DateTimeOffset EffectiveDate);

public sealed record MunicipalityAddressResponse(
    string AddressId,
    string ProfileId,
    string AddressType,
    string Street,
    string City,
    string State,
    string ZipCode,
    string EffectiveDate,
    bool IsCurrent,
    string CreatedAt,
    string CreatedBy,
    string UpdatedAt,
    string UpdatedBy)
{
    public static MunicipalityAddressResponse From(MunicipalityAddress a) =>
        new(a.AddressId, a.ProfileId, a.AddressType, a.Street, a.City, a.State, a.ZipCode,
            a.EffectiveDate.ToString("O"), a.IsCurrent,
            a.CreatedAt.ToString("O"), a.CreatedBy,
            a.UpdatedAt.ToString("O"), a.UpdatedBy);
}

public sealed record MunicipalityAddressProblem(string Error);