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

namespace Campaign_Tracker.Server.Controllers;

/// <summary>
/// Municipality account profile management (Story 1.10).
/// Accessible to ClientServices and Admin roles (HasAny check includes Admin bypass).
/// </summary>
[ApiController]
[Authorize(Policy = ApplicationPolicy.ClientServicesAccess)]
[Route("api/municipalities/profiles")]
public sealed class MunicipalityProfileController : ControllerBase
{
    private readonly IMunicipalityProfileRepository _profiles;
    private readonly ILegacyDataAccess _legacyData;
    private readonly IAuditService _audit;
    private readonly TimeProvider _timeProvider;

    public MunicipalityProfileController(
        IMunicipalityProfileRepository profiles,
        ILegacyDataAccess legacyData,
        IAuditService audit,
        TimeProvider timeProvider)
    {
        _profiles = profiles;
        _legacyData = legacyData;
        _audit = audit;
        _timeProvider = timeProvider;
    }

    // ── Available legacy jurisdictions (JCode picker source) ─────────────────

    [HttpGet("/api/municipalities/jurisdictions")]
    public async Task<ActionResult<IReadOnlyList<LegacyJurisdictionResponse>>> GetJurisdictions(
        CancellationToken cancellationToken)
    {
        var jurisdictions = await _legacyData.GetAllJurisdictionsAsync(cancellationToken);
        return Ok(jurisdictions
            .Select(j => new LegacyJurisdictionResponse(j.JCode, j.Name))
            .ToArray());
    }

    // ── AC #1, AC #2: create and immediately return the combined view ─────────

    [HttpPost]
    public async Task<ActionResult<MunicipalityProfileResponse>> Create(
        [FromBody] CreateMunicipalityProfileRequest request,
        CancellationToken cancellationToken)
    {
        var actor = GetActor();
        var result = await _profiles.CreateAsync(request.JCode, request.DisplayName, actor, cancellationToken);

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

        // AC #3: audit the creation
        _audit.Record(new AuditEvent(
            EventType: "MUNICIPALITY_PROFILE_CREATED",
            ActorIdentity: actor,
            Resource: $"municipalities/profiles/{result.Profile.ProfileId}",
            Outcome: $"created JCode={result.Profile.JCode}",
            TraceIdentifier: HttpContext.TraceIdentifier,
            RecordedAt: _timeProvider.GetUtcNow()));

        var view = await _profiles.GetByIdAsync(result.Profile.ProfileId, cancellationToken);
        if (view is null)
            return StatusCode(500, new MunicipalityProfileProblem("Profile was saved but could not be retrieved."));
        return Ok(MunicipalityProfileResponse.From(view));
    }

    // ── AC #2: list all profiles with resolved legacy data ───────────────────

    [HttpGet]
    public async Task<ActionResult<IReadOnlyList<MunicipalityProfileResponse>>> GetAll(
        CancellationToken cancellationToken)
    {
        var views = await _profiles.GetAllAsync(cancellationToken);
        return Ok(views.Select(MunicipalityProfileResponse.From).ToArray());
    }

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

    // ── AC #3: update with audit log ─────────────────────────────────────────

    [HttpPut("{profileId}")]
    public async Task<ActionResult<MunicipalityProfileResponse>> Update(
        string profileId,
        [FromBody] UpdateMunicipalityProfileRequest request,
        CancellationToken cancellationToken)
    {
        var actor = GetActor();
        var result = await _profiles.UpdateAsync(profileId, request.DisplayName, actor, cancellationToken);

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

        _audit.Record(new AuditEvent(
            EventType: "MUNICIPALITY_PROFILE_UPDATED",
            ActorIdentity: actor,
            Resource: $"municipalities/profiles/{profileId}",
            Outcome: "updated display name",
            TraceIdentifier: HttpContext.TraceIdentifier,
            RecordedAt: _timeProvider.GetUtcNow()));

        var view = await _profiles.GetByIdAsync(profileId, cancellationToken);
        if (view is null)
            return StatusCode(500, new MunicipalityProfileProblem("Profile was updated but could not be retrieved."));
        return Ok(MunicipalityProfileResponse.From(view));
    }

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

public sealed record CreateMunicipalityProfileRequest(string JCode, string? DisplayName);

public sealed record UpdateMunicipalityProfileRequest(string? DisplayName);

public sealed record MunicipalityProfileResponse(
    string ProfileId,
    string JCode,
    string? DisplayName,
    string UpdatedAt,
    string UpdatedBy,
    string? LegacyName,
    string? LegacyMailingAddress,
    string? LegacyCityStateZip)
{
    public static MunicipalityProfileResponse From(MunicipalityProfileView view) =>
        new(view.Profile.ProfileId,
            view.Profile.JCode,
            view.Profile.DisplayName,
            view.Profile.UpdatedAt.ToString("O"),
            view.Profile.UpdatedBy,
            view.LegacyName,
            view.LegacyMailingAddress,
            view.LegacyCityStateZip);
}

public sealed record MunicipalityProfileProblem(string Error);

public sealed record LegacyJurisdictionResponse(string JCode, string? Name);