using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Tiku.Api.Contracts;
using Tiku.Application.Growth;
using Tiku.Application.Security;
using Tiku.Application.Tenancy;
using Tiku.Domain.Tenancy;
using Tiku.Infrastructure.Persistence;

namespace Tiku.Api.Controllers;

[ApiController]
[Tags("学生端-推荐增长")]
[Tiku.Api.Security.RequireSaasFeature(SaasFeatureCatalog.ReferralCommission)]
[Produces("application/json")]
[Route("api/referral")]
public sealed class ReferralController(
    IReferralService referralService,
    ICurrentUser currentUser,
    ITenantContext currentTenant,
    ITenantContextInitializer tenantInitializer,
    ITenantDirectory tenantDirectory) : ControllerBase
{
    [HttpPost("invite-code")]
    [Authorize(Policy = TikuPolicies.CurrentTenantMember)]
    [EndpointSummary("生成或查询当前成员邀请码")]
    [ProducesResponseType<ReferralInviteItem>(StatusCodes.Status200OK)]
    public async Task<ActionResult<ReferralInviteItem>> InviteCode(
        ReferralInviteDto request,
        CancellationToken cancellationToken)
    {
        return Ok(await referralService.GetOrCreateInviteCodeAsync(
            ResolveUserActor(),
            request.ToCommand(),
            cancellationToken));
    }

    [HttpPost("resolve")]
    [AllowAnonymous]
    [EndpointSummary("解析推荐邀请码")]
    [ProducesResponseType<ReferralResolutionItem>(StatusCodes.Status200OK)]
    [ProducesResponseType<ProblemDetails>(StatusCodes.Status404NotFound)]
    public async Task<ActionResult<ReferralResolutionItem>> Resolve(
        ResolveReferralDto request,
        CancellationToken cancellationToken)
    {
        return Ok(await referralService.ResolveAsync(
            new ReferralActor(await ResolveTenantIdAsync(request.TenantCode, cancellationToken), currentUser.UserId),
            request.ToCommand(),
            cancellationToken));
    }

    [HttpPost("track-event")]
    [AllowAnonymous]
    [EndpointSummary("记录推荐行为")]
    [ProducesResponseType<ReferralTrackResult>(StatusCodes.Status200OK)]
    [ProducesResponseType<ProblemDetails>(StatusCodes.Status404NotFound)]
    public async Task<ActionResult<ReferralTrackResult>> TrackEvent(
        TrackReferralEventDto request,
        CancellationToken cancellationToken)
    {
        return Ok(await referralService.TrackEventAsync(
            new ReferralActor(await ResolveTenantIdAsync(request.TenantCode, cancellationToken), currentUser.UserId),
            request.ToCommand(),
            HttpContext.Connection.RemoteIpAddress?.ToString(),
            Request.Headers.UserAgent.FirstOrDefault(),
            cancellationToken));
    }

    [HttpPost("bind")]
    [Authorize(Policy = TikuPolicies.CurrentTenantMember)]
    [EndpointSummary("绑定当前用户推荐归属")]
    [ProducesResponseType<ReferralBindResult>(StatusCodes.Status200OK)]
    public async Task<ActionResult<ReferralBindResult>> Bind(
        BindReferralDto request,
        CancellationToken cancellationToken)
    {
        return Ok(await referralService.BindAsync(
            ResolveUserActor(),
            request.ToCommand(),
            cancellationToken));
    }

    [HttpPost("qrcode")]
    [Authorize(Policy = TikuPolicies.CurrentTenantMember)]
    [EndpointSummary("生成或查询推广二维码")]
    [ProducesResponseType<ReferralQrcodeItem>(StatusCodes.Status200OK)]
    public async Task<ActionResult<ReferralQrcodeItem>> Qrcode(
        ReferralQrcodeDto request,
        CancellationToken cancellationToken)
    {
        return Ok(await referralService.GetOrCreateQrcodeAsync(
            ResolveUserActor(),
            request.ToCommand(),
            cancellationToken));
    }

    [HttpGet("stats")]
    [Tags("租户端-推荐增长")]
    [Authorize(Policy = BackendPermissions.TenantCrmManage)]
    [EndpointSummary("查询推荐人个人统计")]
    [ProducesResponseType<ReferralStatsItem>(StatusCodes.Status200OK)]
    public async Task<ActionResult<ReferralStatsItem>> Stats(
        [FromQuery] ReferralStatsQueryDto query,
        CancellationToken cancellationToken)
    {
        return Ok(await referralService.GetStatsAsync(
            ResolveAdminActor(),
            query.ToQuery(),
            cancellationToken));
    }

    [HttpGet("sales-stats")]
    [Tags("租户端-推荐增长")]
    [Authorize(Policy = BackendPermissions.TenantCrmManage)]
    [EndpointSummary("查询销售推荐统计排行")]
    [ProducesResponseType<ReferralList<ReferralStatsItem>>(StatusCodes.Status200OK)]
    public async Task<ActionResult<ReferralList<ReferralStatsItem>>> SalesStats(
        [FromQuery] ReferralStatsQueryDto query,
        CancellationToken cancellationToken)
    {
        return Ok(await referralService.GetSalesStatsAsync(
            ResolveAdminActor(),
            query.ToQuery(),
            cancellationToken));
    }

    [HttpGet("conversion-report")]
    [Tags("租户端-推荐增长")]
    [Authorize(Policy = BackendPermissions.TenantCrmManage)]
    [EndpointSummary("查询推荐转化报告")]
    [ProducesResponseType<ReferralConversionReport>(StatusCodes.Status200OK)]
    public async Task<ActionResult<ReferralConversionReport>> ConversionReport(
        [FromQuery] ReferralConversionQueryDto query,
        CancellationToken cancellationToken)
    {
        return Ok(await referralService.GetConversionReportAsync(
            ResolveAdminActor(),
            query.ToQuery(),
            cancellationToken));
    }

    [HttpGet("sales-clients")]
    [Tags("租户端-推荐增长")]
    [Authorize(Policy = BackendPermissions.TenantCrmManage)]
    [EndpointSummary("查询推荐人名下客户")]
    [ProducesResponseType<ReferralList<ReferralLeadItem>>(StatusCodes.Status200OK)]
    public async Task<ActionResult<ReferralList<ReferralLeadItem>>> SalesClients(
        [FromQuery] ReferralStatsQueryDto query,
        CancellationToken cancellationToken)
    {
        return Ok(await referralService.GetClientsAsync(
            ResolveAdminActor(),
            query.ToQuery(),
            cancellationToken));
    }

    [HttpPost("manual-bind")]
    [Tags("租户端-推荐增长")]
    [Authorize(Policy = BackendPermissions.TenantCrmManage)]
    [EndpointSummary("人工调整学生推荐归属")]
    [ProducesResponseType<ReferralBindResult>(StatusCodes.Status200OK)]
    public async Task<ActionResult<ReferralBindResult>> ManualBind(
        ManualBindReferralDto request,
        CancellationToken cancellationToken)
    {
        return Ok(await referralService.ManualBindAsync(
            ResolveAdminActor(),
            request.ToCommand(),
            cancellationToken));
    }

    [HttpGet("team")]
    [Tags("租户端-推荐增长")]
    [Authorize(Policy = BackendPermissions.TenantCrmManage)]
    [EndpointSummary("查询推荐团队成员")]
    [ProducesResponseType<ReferralList<ReferralTeamItem>>(StatusCodes.Status200OK)]
    public async Task<ActionResult<ReferralList<ReferralTeamItem>>> Team(
        [FromQuery] ReferralTeamQueryDto query,
        CancellationToken cancellationToken)
    {
        return Ok(await referralService.GetTeamAsync(
            ResolveAdminActor(),
            query.ToQuery(),
            cancellationToken));
    }

    [HttpPut("team")]
    [Tags("租户端-推荐增长")]
    [Authorize(Policy = BackendPermissions.TenantCrmManage)]
    [EndpointSummary("新增或更新推荐团队关系")]
    [ProducesResponseType<ReferralTeamItem>(StatusCodes.Status200OK)]
    public async Task<ActionResult<ReferralTeamItem>> UpsertTeam(
        UpsertReferralTeamDto request,
        CancellationToken cancellationToken)
    {
        return Ok(await referralService.UpsertTeamAsync(
            ResolveAdminActor(),
            request.ToCommand(),
            cancellationToken));
    }

    private ReferralActor ResolveUserActor()
    {
        if (currentTenant.TenantId is null || currentUser.UserId is null)
        {
            throw new ReferralException("Current referral actor was not resolved.", "referral_access_denied");
        }

        return new ReferralActor(currentTenant.TenantId.Value, currentUser.UserId.Value);
    }

    private ReferralAdminActor ResolveAdminActor()
    {
        if (currentTenant.TenantId is null || currentUser.UserId is null)
        {
            throw new ReferralException("Referral admin actor was not resolved.", "referral_access_denied");
        }

        return new ReferralAdminActor(currentTenant.TenantId.Value, currentUser.UserId.Value);
    }

    private async Task<Guid> ResolveTenantIdAsync(string? tenantCode, CancellationToken cancellationToken)
    {
        if (currentTenant.TenantId.HasValue)
        {
            return currentTenant.TenantId.Value;
        }

        var resolvedTenantCode = tenantCode ?? Request.Headers["x-tenant-code"].FirstOrDefault();
        if (string.IsNullOrWhiteSpace(resolvedTenantCode))
        {
            throw new TenantNotFoundException();
        }

        var tenant = await tenantDirectory.FindByCodeAsync(resolvedTenantCode.Trim(), cancellationToken)
            ?? throw new TenantNotFoundException();
        tenantInitializer.Initialize(tenant.TenantId, tenant.TenantCode, TenantResolutionSource.TenantCode);
        return tenant.TenantId;
    }
}