using AgriculturalPlatform.Api.Data;
using AgriculturalPlatform.Api.Dtos;
using AgriculturalPlatform.Api.Models;
using AgriculturalPlatform.Api.Services;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace AgriculturalPlatform.Api.Controllers;

[ApiController]
[Route("api/orgs")]
[Authorize]
public class OrgsController(AppDbContext db, DataScopeService scope, CurrentUserService currentUser) : ControllerBase
{
    /// <summary>组织列表（按数据权限过滤）</summary>
    [HttpGet]
    public async Task<ActionResult> List(string? type, string? keyword)
    {
        var visible = await scope.GetVisibleOrgIdsAsync(currentUser.Get());
        var query = db.Organizations.Include(o => o.Parent).AsQueryable();
        if (visible is not null)
            query = query.Where(o => visible.Contains(o.Id));
        if (!string.IsNullOrWhiteSpace(type) && Enum.TryParse<OrgType>(type, out var orgType))
            query = query.Where(o => o.Type == orgType);
        if (!string.IsNullOrWhiteSpace(keyword))
            query = query.Where(o => o.Name.Contains(keyword) || o.ContactPerson.Contains(keyword) || o.Phone.Contains(keyword));

        var items = await query.OrderBy(o => o.Type).ThenBy(o => o.Id).ToListAsync();
        return Ok(items.ToDtos());
    }

    /// <summary>组织详情</summary>
    [HttpGet("{id:int}")]
    public async Task<ActionResult<OrgDto>> Get(int id)
    {
        var org = await db.Organizations.Include(o => o.Parent).FirstOrDefaultAsync(o => o.Id == id);
        if (org is null) return NotFound();
        return Ok(org.ToDto());
    }

    /// <summary>新增组织</summary>
    [HttpPost]
    public async Task<ActionResult<OrgDto>> Create(OrgSaveRequest req)
    {
        if (!Enum.TryParse<OrgType>(req.Type, out var orgType))
            return BadRequest(new { message = "组织类型不正确" });

        var org = new Organization
        {
            Type = orgType,
            Name = req.Name,
            ParentId = req.ParentId,
            ContactPerson = req.ContactPerson,
            Phone = req.Phone,
            Address = req.Address,
            TaxNo = req.TaxNo,
            IsActive = req.IsActive
        };
        db.Organizations.Add(org);
        await db.SaveChangesAsync();
        return Ok((await db.Organizations.Include(o => o.Parent).FirstAsync(o => o.Id == org.Id)).ToDto());
    }

    /// <summary>修改组织</summary>
    [HttpPut("{id:int}")]
    public async Task<ActionResult<OrgDto>> Update(int id, OrgSaveRequest req)
    {
        var org = await db.Organizations.FindAsync(id);
        if (org is null) return NotFound();
        if (Enum.TryParse<OrgType>(req.Type, out var orgType)) org.Type = orgType;
        org.Name = req.Name;
        org.ParentId = req.ParentId;
        org.ContactPerson = req.ContactPerson;
        org.Phone = req.Phone;
        org.Address = req.Address;
        org.TaxNo = req.TaxNo;
        org.IsActive = req.IsActive;
        await db.SaveChangesAsync();
        return Ok((await db.Organizations.Include(o => o.Parent).FirstAsync(o => o.Id == org.Id)).ToDto());
    }

    /// <summary>删除组织（存在关联时禁止删除）</summary>
    [HttpDelete("{id:int}")]
    public async Task<IActionResult> Delete(int id)
    {
        var org = await db.Organizations.FindAsync(id);
        if (org is null) return NotFound();
        if (await db.Organizations.AnyAsync(o => o.ParentId == id))
            return BadRequest(new { message = "该组织下存在下级组织，无法删除" });
        if (await db.PurchaseOrders.AnyAsync(p => p.PurchaserOrgId == id))
            return BadRequest(new { message = "该组织已有收购业务，无法删除" });
        if (await db.Users.AnyAsync(u => u.OrgId == id))
            return BadRequest(new { message = "该组织下存在用户，无法删除" });

        db.Organizations.Remove(org);
        await db.SaveChangesAsync();
        return Ok(new { message = "删除成功" });
    }
}