using System.Text.Json;
using System.Text.Json.Nodes;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using MiGu.Server.Configs;
using MiGu.Server.Signal;

namespace MiGu.Server.Controllers;

/// <summary>
/// 迷毂「数据中心」：把 scene.signal 的 Model JSON 以表格读写（PLC 握手 / 磁条交管）。
/// 文件落在 SimpleLite 工作目录 <c>Config/Signal/*.json</c>，不依赖 SimpleLite 进程是否在跑。
/// </summary>
[ApiController]
[Authorize(Policy = "PlatformScope")]
[Route("api/signal-data")]
public sealed class SignalDataController : ControllerBase
{
    private readonly SignalDataStore _store;
    private readonly ConfigStore _config;

    public SignalDataController(SignalDataStore store, ConfigStore config)
    {
        _store = store;
        _config = config;
    }

    [HttpGet]
    public IActionResult List([FromQuery] bool summary = false)
    {
        var enabled = SignalEnabled();
        var tables = summary
            ? _store.GetTables().Select(ProjectSummary).ToList()
            : _store.GetTables().Select(ProjectTable).ToList();
        return Ok(new
        {
            signalEnabled = enabled,
            workingDirectory = _store.ResolveWorkingDirectory(),
            tables
        });
    }

    [HttpGet("{id}")]
    public IActionResult Get(string id)
    {
        var table = _store.Find(id);
        if (table == null)
            return NotFound(new { message = $"未知数据表：{id}" });
        return Ok(ProjectTable(table));
    }

    [HttpPut("{id}")]
    public IActionResult Save(string id, [FromBody] JsonElement body)
    {
        var table = _store.Find(id);
        if (table == null)
            return NotFound(new { message = $"未知数据表：{id}" });

        if (!body.TryGetProperty("rows", out var rowsEl) || rowsEl.ValueKind != JsonValueKind.Array)
            return BadRequest(new { message = "请求体需要 rows 数组" });

        JsonArray rows;
        try
        {
            rows = JsonNode.Parse(rowsEl.GetRawText()) as JsonArray ?? new JsonArray();
        }
        catch (Exception ex)
        {
            return BadRequest(new { message = $"rows 不是合法 JSON 数组：{ex.Message}" });
        }

        try
        {
            _store.SaveRows(table, rows);
        }
        catch (Exception ex)
        {
            return StatusCode(500, new { message = $"保存失败：{ex.Message}" });
        }

        return Ok(ProjectTable(table));
    }

    private object ProjectSummary(SignalTableDef table) => new
    {
        id = table.Id,
        title = table.Title,
        category = table.Category,
        fileName = table.FileName
    };

    private object ProjectTable(SignalTableDef table)
    {
        var (path, error) = _store.ResolveFile(table, createDir: false);
        var exists = path != null && System.IO.File.Exists(path);
        return new
        {
            id = table.Id,
            title = table.Title,
            category = table.Category,
            fileName = table.FileName,
            exists,
            error,
            columns = table.Columns,
            rows = _store.LoadRows(table)
        };
    }

    private bool SignalEnabled() =>
        _config.GetDeployment().ToLauncherSceneIds()
            .Contains(DeploymentProfile.SignalSceneId, StringComparer.OrdinalIgnoreCase);
}