using System.Security.Claims;
using System.Text.Json;
using JobTrackerApi.Controllers;
using JobTrackerApi.Models;
using JobTrackerApi.Services;
using JobTrackerApi.Tests.TestSupport;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Moq;
using Xunit;

namespace JobTrackerApi.Tests;

public class CvImportMappingControllerTests
{
    [Fact]
    public async Task Mapping_order_is_part_of_replay_identity_while_exact_legacy_receipts_still_work()
    {
        await using var db = TestHostFactory.CreateInMemoryDb("user-1");
        var user = new ApplicationUser { Id = "user-1", UserName = "mapping-order" };
        db.Users.Add(user);
        var blocks = new[] { new CvImportBlock("b1", "Engineer First", "paragraph", 1), new CvImportBlock("b2", "Lead Second", "paragraph", 1) };
        var document = new CvImportDocument("Engineer First Lead Second", false, "application/pdf", 1, 26, "synthetic.pdf", blocks, Array.Empty<string>(), "synthetic");
        var run = new CvExtractionRun { OwnerUserId = user.Id, ParserVersion = ProfileCvController.DocumentParserVersion, Status = "pending_review", DocumentJson = JsonSerializer.Serialize(document), StructuredProfileJson = StructuredCvProfileJson.SerializePersisted(new()) };
        db.CvExtractionRuns.Add(run);
        await db.SaveChangesAsync();
        var users = TestHostFactory.CreateUserManager();
        users.Setup(u => u.GetUserAsync(It.IsAny<ClaimsPrincipal>())).ReturnsAsync(user);
        users.Setup(u => u.UpdateAsync(user)).ReturnsAsync(IdentityResult.Success);
        var controller = new ProfileCvController(users.Object, Mock.Of<ISummarizerService>(), db, null!) { ControllerContext = new() { HttpContext = new DefaultHttpContext() } };
        var mappings = new[]
        {
            new CvImportRecordMapping("z-first", "jobs", null, new[] { new CvImportMappedField("title", "Engineer", "b1"), new CvImportMappedField("company", "First", "b1") }),
            new CvImportRecordMapping("a-second", "jobs", null, new[] { new CvImportMappedField("title", "Lead", "b2"), new CvImportMappedField("company", "Second", "b2") }),
        };
        var request = new ProfileCvController.ApplyReviewedRequest(0, Array.Empty<CvImportDecision>(), mappings);
        Assert.IsType<OkObjectResult>(await controller.ApplyReviewed(run.Id, request));
        var receipt = System.Text.Json.Nodes.JsonNode.Parse(run.ReviewJson!)!;
        receipt["Hash"] = Convert.ToHexString(System.Security.Cryptography.SHA256.HashData(JsonSerializer.SerializeToUtf8Bytes(new { request.ExpectedVersion, Decisions = request.Decisions!.OrderBy(d => d.Id, StringComparer.Ordinal), Mappings = mappings.OrderBy(m => m.ClientId, StringComparer.Ordinal) })));
        run.ReviewJson = receipt.ToJsonString();
        await db.SaveChangesAsync();
        Assert.IsType<OkObjectResult>(await controller.ApplyReviewed(run.Id, request));
        Assert.IsType<ConflictObjectResult>(await controller.ApplyReviewed(run.Id, request with { Mappings = mappings.Reverse().ToArray() }));
        Assert.Single(await db.CareerProfileVersions.ToListAsync());
    }
    [Fact]
    public async Task Mapping_only_apply_is_revision_bound_audited_and_idempotent()
    {
        await using var db = TestHostFactory.CreateInMemoryDb("user-1");
        var user = new ApplicationUser { Id = "user-1", UserName = "mapping-user" };
        db.Users.Add(user);
        var document = new CvImportDocument("Engineer Example 2020", false, "application/pdf", 1, 21, "synthetic.pdf", new[] { new CvImportBlock("b1", "Engineer Example 2020", "paragraph", 1) }, Array.Empty<string>(), "docling");
        var run = new CvExtractionRun { OwnerUserId = user.Id, ParserVersion = ProfileCvController.DocumentParserVersion, Status = "pending_review", DocumentJson = JsonSerializer.Serialize(document), StructuredProfileJson = StructuredCvProfileJson.SerializePersisted(new()) };
        db.CvExtractionRuns.Add(run);
        await db.SaveChangesAsync();
        var users = TestHostFactory.CreateUserManager();
        users.Setup(u => u.GetUserAsync(It.IsAny<ClaimsPrincipal>())).ReturnsAsync(user);
        users.Setup(u => u.UpdateAsync(user)).ReturnsAsync(IdentityResult.Success);
        var controller = new ProfileCvController(users.Object, Mock.Of<ISummarizerService>(), db, null!) { ControllerContext = new() { HttpContext = new DefaultHttpContext() } };
        var review = Assert.IsType<CvImportReview>(Assert.IsType<OkObjectResult>(await controller.GetImportReview(run.Id)).Value);
        Assert.Single(review.SourceBlocks);
        Assert.Contains(review.MappingCategories, c => c.Category == "jobs" && c.Fields.Any(f => f.Name == "title"));
        var mappings = new[] { new CvImportRecordMapping("job-1", "jobs", null, new[] { new CvImportMappedField("title", "Engineer", "b1"), new CvImportMappedField("company", "Example", "b1"), new CvImportMappedField("start", "2020", "b1") }) };
        var request = new ProfileCvController.ApplyReviewedRequest(0, Array.Empty<CvImportDecision>(), mappings);
        Assert.IsType<OkObjectResult>(await controller.ApplyReviewed(run.Id, request));
        Assert.IsType<OkObjectResult>(await controller.ApplyReviewed(run.Id, request));
        Assert.Single((await new CareerProfileService(db).LoadStructuredAsync(user.Id, default)).Jobs);
        Assert.Single(await db.CareerProfileVersions.ToListAsync());
        Assert.Contains("job-1", run.ReviewJson);
        Assert.IsType<ConflictObjectResult>(await controller.ApplyReviewed(run.Id, request with { Mappings = new[] { mappings[0] with { ClientId = "changed" } } }));
        var updatedReview = Assert.IsType<CvImportReview>(Assert.IsType<OkObjectResult>(await controller.GetImportReview(run.Id)).Value);
        Assert.Contains(updatedReview.Targets, t => t.Category == "jobs" && t.Index == 0);
        Assert.Equal("Engineer", updatedReview.Targets.Single(t => t.Category == "jobs" && t.Index == 0).Values!["title"]);
    }
}